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Yang Y, Zhong Z, Jin B, Zhang B, Du H, Li Q, Zheng X, Qi R, Ren P. Stabilization of heavy metals in solid waste and sludge pyrolysis by intercalation-exfoliation modified vermiculite. J Environ Manage 2024; 356:120747. [PMID: 38537473 DOI: 10.1016/j.jenvman.2024.120747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/02/2024] [Accepted: 03/20/2024] [Indexed: 04/07/2024]
Abstract
Increasing amounts of solid waste and sludge have created many environmental management problems. Pyrolysis can effectively reduce the volume of solid waste and sludge, but there is still the problem of heavy metal contamination, which limits the application of pyrolysis in environmental management. The intercalated-exfoliated modified vermiculite (IEMV) by intercalators of sodium dodecylbenzene sulfonate, hexadecyltrimethylammonium bromide and octadecyltrimethylammonium bromide were used to control the release of Cd, Cr, Cu, Zn and Pb during pyrolysis process of sludge or solid waste. The retention of heavy metals in sludge was generally better than that in solid waste. The IEMV by octadecyltrimethylammonium bromide as the intercalator calcined 800 °C (STAB-800) was the best additive for heavy metal retention, and the retention of Cr, Cu and Zn was significantly better than that of Pb and Cd. Cr, Cu, Zn and Pb were at low risk, while Cd had considerable risk under certain circumstances. New models were proposed to comprehensively evaluate the results of the risk and forms of heavy metals, and the increasing temperature was beneficial in reducing the hazards of heavy metals by the addition of STAB-800. The reaction mechanism of heavy metals with vermiculite was revealed by simulation of reaction sites, Fukui Function and Frontier Molecular Orbital. Thermal activation-intercalated-exfoliated modified vermiculite (T-IEMV) is more reactive and had more active sites for heavy metals. Mg atoms and outermost O atoms are the main atoms for T-IEMV to react with heavy metals. The Cr, Cu and Zn have better adsorption capacity by T-IEMV than Pb and Cd. This study provides a new insight into managing solid waste and sludge and controlling heavy metal environmental pollution.
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Affiliation(s)
- Yuxuan Yang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Zhaoping Zhong
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
| | - Baosheng Jin
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Bo Zhang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Haoran Du
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Qian Li
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Xiang Zheng
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Renzhi Qi
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
| | - Pengkun Ren
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
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Cha-Um K, Juansawang A, Tisarum R, Praseartkul P, Sotesaritkul T, Singh HP, Cha-Um S. Bioaccumulation efficacy and physio-morphological adaptations in response to iron and aluminium contamination of Indian camphorweed (Pluchea indica L.) using different growth substrates. Environ Sci Pollut Res Int 2024; 31:23623-23637. [PMID: 38418794 DOI: 10.1007/s11356-024-32686-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 02/24/2024] [Indexed: 03/02/2024]
Abstract
The aim of this study was to assess the removal capability of Fe/Al contamination of Indian camphorweed (Pluchea indica; hereafter, P. indica) using different growth substrates (100% sand, gardening soil, vermiculite, and zeolite). In addition, the study aimed at observing the physio-morphological adaptation strategies of P. indica under excess Fe/Al levels in a controlled greenhouse environment. After a 4-week treatment, P. indica plants under excess Fe in the 100% sand substrate exhibited signs of decay and eventually death. In contrast, the growth performances of P. indica under gardening soil substrate remained sustained even when exposed to Fe/Al stress. Under zeolite substrate, Fe in the root tissues was 23.1 and 34.7 mg g-1 DW after 1 and 4 weeks of incubation, respectively. In addition, Al in the root tissues also increased to 1.54 mg g-1 DW after 1 week and 1.59 mg g-1 DW after 4 weeks, when subjected to 20 mM Al treatment. Zeolite was observed to be a promising substrate to regulate the uptake of Fe (3.31 mg plant-1) and Al (0.51 mg plant-1) by the root tissues. The restriction of Fe and Al in the root and a low translocation to the leaf organ was indicated by a low translocation factor (< 1.0). High Fe concentrations in the root and leaf tissues negatively affected root elongation, and the net photosynthetic rate decreased by > 40% compared to positive control. Gas exchange parameters and leaf temperature were found the most sensitive to Fe/Al stress. Moreover, the limited transpiration rate under Fe/Al stress caused an increase of the leaf temperature and crop stress index. The findings suggest that P. indica grown using zeolite substrate may serve as a good model system for constructed wetlands, storing excess Al in the root tissues without any significant growth inhibition.
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Affiliation(s)
- Kwankhao Cha-Um
- Science Classrooms in University-Affiliated School Project (SCIUS), Thamasart University, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Araya Juansawang
- Science Classrooms in University-Affiliated School Project (SCIUS), Thamasart University, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Rujira Tisarum
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Patchara Praseartkul
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Thanyaporn Sotesaritkul
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Harminder Pal Singh
- Department of Environment Studies, Faculty of Science, Panjab University, Chandigarh, 160014, India
| | - Suriyan Cha-Um
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Paholyothin Road, Khlong Nueng, Khlong Luang, 12120, Pathum Thani, Thailand.
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Yang Y, Zhong Z, Du H, Li Q, Zheng X, Qi R, Ren P. Experimental and theoretical study to control the heavy metals in solid waste and sludge during pyrolysis using modified expanded vermiculite. J Hazard Mater 2024; 463:132885. [PMID: 37918072 DOI: 10.1016/j.jhazmat.2023.132885] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 11/04/2023]
Abstract
Na+/K+/Mg2+/Ca2+ expansion-modified vermiculite and calcination expansion (700 °C, 800 °C and 900 °C)-modified vermiculite (700-Mg-V, 800-Mg-V and 900-Mg-V) were prepared as additives to control the emission of five heavy metals (Zn, Cr, Cu, Pb, and Cd) during the pyrolysis of municipal sewage sludge, paper mill sludge, municipal domestic waste, and aged refuse. Mg2+-Modified vermiculite obtained via thermally activated calcination at 800 °C retained 65% of heavy metals from all raw materials at 450 °C. Zn, Cr, and Cu retained nearly 90%. Although modified vermiculite could reduce the ecological risk, Cd had an ecological risk level higher than Zn, Cr, Cu, and Pb. The fine textural properties, laminated morphology, and expansion capacity of modified vermiculite were positively correlated with its retention of heavy metals. Heavy metals interacted with the (002) surface of vermiculite, and the reactions were mainly concentrated near the 17-O and surrounding atoms. The heavy-metal monomers were less capable of binding to the (002) surface of vermiculite than the oxides and chlorides of heavy metals. The effect of heavy-metal oxides and chlorides binding to the (002) surface of vermiculite was related to heavy metals.
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Affiliation(s)
- Yuxuan Yang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Zhaoping Zhong
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
| | - Haoran Du
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Qian Li
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Xiang Zheng
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Renzhi Qi
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Pengkun Ren
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
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Xu M, Wu J, Wang J, Liu W, Sun L, Zhou W, Du Y, Li Y, Li H. Covalent organic framework modified vermiculite for total Cr removal and subsequent recycling for efficient ciprofloxacin and NO photooxidation. J Colloid Interface Sci 2023; 652:218-230. [PMID: 37595439 DOI: 10.1016/j.jcis.2023.08.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/12/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023]
Abstract
Design and fabrication of feasible remediation composites for total Cr (Cr(T)) removal is still challenging but urgently required. Herein, eco-friendly expanded vermiculite (VE) is integrated with a photoactive covalent organic framework (COF) polymer, in which photoinduced electrons of surface anchored COF can freely transfer to Cr(VI) for chemical reduction, and layered expanded VE allows ion exchange between resultant Cr(III) cations and interlayered K+, Ca2+, Mg2+, Na+, etc. The Cr(T) removal capacities of the surface-modified VE with important parameters (solution pH value, initial Cr(VI) concentration, etc.) are discussed extensively to understand how to select the best conditions for optimum Cr(T) removal performance. More interestingly, from a circular economy view point, spent Cr-loading VE-based waste can serve as a photocatalyst towards oxidation conversion of ciprofloxacin and NO gas subsequently. Explanations for different effects on physicochemical properties as well as catalytic activities of the reused Cr-loading waste are given. This strategy could provide valuable and promising contribution towards the development of sustainable low-cost mineral materials for Cr(T) removal. These findings also shed new light on the research of recycling spent photocatalyst for resource and reutilization.
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Affiliation(s)
- Meng Xu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Junshu Wu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China.
| | - Jinshu Wang
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China.
| | - Wanchen Liu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Lingmin Sun
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Wenyuan Zhou
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Yucheng Du
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Yongli Li
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
| | - Hongyi Li
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100022, China
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Zhang B, Gao B, Ma W, Mo Z, Song Y, Xie S, Jiang F, Hu X. Adsorption of uranium(VI) by natural vermiculite: Isotherms, kinetic, thermodynamic and mechanism studies. J Environ Radioact 2023; 270:107305. [PMID: 37857022 DOI: 10.1016/j.jenvrad.2023.107305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/30/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
Human activities such as mining uranium resources, hydrometallurgy, and nuclear fuel preparation inevitably produce wastewater sludge containing radionuclides, posing a severe threat to the environment around the production site. Natural clay minerals have been widely used in groundwater pollution remediation because of their high cation exchange capacity. Through static batch experiments, the optimal pH range of vermiculite for U(VI) adsorption was 6-8,the maximum adsorption capacity was 1.62 × 10-5 mol g-1. The kinetic adsorption results indicated that the adsorption mode was mainly multilayer non-homogeneous chemisorption. In addition, the adsorption of vermiculite on U(VI) was found to be a heat absorption process according to the thermodynamic model fitting, and the spontaneous reactivity of U(VI) adsorption on vermiculite surface was positively correlated with temperature and negatively correlated with the initial concentration of U(VI). Combined with SEM-EDS and FT-IR results, the adsorption process of vermiculite on U(VI) is mainly an ion exchange and complexation reaction, and U(VI) is removed in the form of ≡ SUOU22+ or ≡ SOUO2OH, etc., by XPS means. The results of this study not only investigated the adsorption behavior and mechanism of natural vermiculite in groundwater contaminated with simulated uranium but also provided theoretical support for its feasibility in remediating uranium-polluted groundwater.
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Affiliation(s)
- Bo Zhang
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - Bai Gao
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, China; School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China.
| | - Wenjie Ma
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - Zifen Mo
- The Fifth Geological Brigade of Jiangxi Geological Bureau, Nanchang, 330013, China
| | - Yong Song
- Jiangxi Geological Bureau Non-Ferrous Geology Brigade, Ganzhou, 341000, China
| | - SiLei Xie
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - FangRong Jiang
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - XinWei Hu
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
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Głąb T, Gondek K, Marcińska-Mazur L, Jarosz R, Mierzwa-Hersztek M. Effect of organic/inorganic composites as soil amendments on the biomass productivity and root architecture of spring wheat and rapeseed. J Environ Manage 2023; 344:118628. [PMID: 37536237 DOI: 10.1016/j.jenvman.2023.118628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/26/2023] [Accepted: 07/11/2023] [Indexed: 08/05/2023]
Abstract
Organic and inorganic soil amendments are used to increase crop yields and fertilizer efficiency, as well as to improve the physical and biological properties of soil, increase carbon sequestration, and restore contaminated and saline soils. The present study aimed to evaluate the effect of various zeolite composites mixed with either lignite or leonardite on the biomass production of spring wheat and rapeseed and their root morphology. A pot experiment involved the application of the following treatments: zeolite-carbon, zeolite-vermiculite composites, both mixed with lignite or leonardite, and a control treatment with no amendments. Inorganic composites were applied in a dose of 3% and 6%. The study also included an analysis of the root morphometric parameters and aboveground biomass of spring wheat and rapeseed. The lowest productivity was observed when both crops were not enriched with fertilizers or other amendments, 24.92 g per pot and 29.83 g per pot for spring wheat and rapeseed, respectively. The application of mineral fertilizers in combination with zeolite-carbon composite gave the highest aboveground biomass of spring wheat, 110.11 g per pot. Both zeolite-carbon and zeolite-vermiculite composites modified the morphological parameters of roots, with the control treatment showing the lowest root length and dry matter. Although mineral fertilization was found to have a positive impact root development in relation to untreated control, the treatment amended with zeolite-carbon composite and leonardite exhibited the highest root length and biomass of spring wheat. No other soil amendments improved the properties of rapeseed roots.
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Affiliation(s)
- Tomasz Głąb
- Department of Machinery Exploitation, Ergonomics and Production Processes, University of Agriculture in Krakow, ul. Balicka 116B, 31-149, Krakow, Poland
| | - Krzysztof Gondek
- Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, al. Mickiewicza 21, 31-120, Kraków, Poland
| | - Lidia Marcińska-Mazur
- Department of Mineralogy, Petrography and Geochemistry, AGH University of Science and Technology, al. Mickiewicza 30, 30-059, Krakow, Poland.
| | - Renata Jarosz
- Department of Mineralogy, Petrography and Geochemistry, AGH University of Science and Technology, al. Mickiewicza 30, 30-059, Krakow, Poland
| | - Monika Mierzwa-Hersztek
- Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, al. Mickiewicza 21, 31-120, Kraków, Poland; Department of Mineralogy, Petrography and Geochemistry, AGH University of Science and Technology, al. Mickiewicza 30, 30-059, Krakow, Poland
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de Farias ABV, da Costa TB, da Silva MGC, Vieira MGA. Cerium biosorption onto alginate/ vermiculite-based particles functionalized with ionic imprinting: Kinetics, equilibrium, thermodynamic, and reuse studies. Int J Biol Macromol 2023; 241:124542. [PMID: 37086768 DOI: 10.1016/j.ijbiomac.2023.124542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 04/03/2023] [Accepted: 04/17/2023] [Indexed: 04/24/2023]
Abstract
Cerium is an essential element for several applications in industry, therefore, recovering it from secondary sources is a promising strategy from an economic and environmental perspective. For this purpose, biosorption is a low-cost and effective alternative. The present work evaluated the recovery of Ce3+ from aqueous solutions using alginate/vermiculite-based particles (ALEV) functionalized by ionic imprinting. From the kinetic assays, it was verified that the uptake of Ce3+ followed the pseudo-second-order model and was mainly controlled by external diffusion. The Langmuir model better described the equilibrium data, and a maximum biosorption capacity of 0.671 mmol/g at 45 °C was attained. The evaluation of the thermodynamic quantities revealed that the process occurs spontaneously and endothermically. The particles reuse and Ce3+ recovery were achieved using 0.1 mol/L HCl or 1.0 mol/L CaCl2 solutions for up to four cycles of biosorption/desorption. The biosorbent was characterized before and posted Ce3+ biosorption to investigate the morphology, textural properties, crystallinity, thermal resistance, composition, and functional groups of the biosorbent.
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Affiliation(s)
| | - Talles Barcelos da Costa
- University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil
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Nie Y, Chen W, Kang Y, Yuan X, Li Y, Zhou J, Tao W, Ji X. Two-dimensional porous vermiculite-based nanocatalysts for synergetic catalytic therapy. Biomaterials 2023; 295:122031. [PMID: 36731367 DOI: 10.1016/j.biomaterials.2023.122031] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/09/2023] [Accepted: 01/27/2023] [Indexed: 01/30/2023]
Abstract
This study reports an ultrasound-mediated and two-dimensional (2D) porous vermiculite nanosheets (VMT NSs)-based nanocatalyst platform (Arg@VMT@PDA-PEG) that synergistically harnessed the Fenton reaction-based chemodynamic therapy (CDT), 2D semiconductor-based sonodynamic therapy (SDT) and nitric oxide (NO)-based gas therapy for combination cancer therapy. The tumor microenvironment responsive degradation of polydopamine (PDA) shell could not only prevent L-Arg, a NO donor, leakage during blood circulation, but also selectively release the active sites of VMT NSs for catalytic reactions in tumor cells. Additionally, the Fenton reactions mediated by the abundant Fe2+/Fe3+ in VMT NSs could efficiently produce ·OH and consume glutathione (GSH) for CDT. Moreover, the reactive oxygen species (ROS, ·OH and ·O2-) produced by ultrasound-triggered Arg@VMT@PDA-PEG could not only execute SDT but also oxidize L-Arg to NO for synergetic gas therapy. The results show that the transformation of ROS to NO can enhance curative efficacy owing to the ability of NO with much longer life-time in freely diffusing into cells from intercellular space. This biodegradable Arg@VMT@PDA-PEG nanocatalytic platform integrating three different catalytic reactions provides a new therapeutic paradigm for combination cancer therapy.
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Affiliation(s)
- Yichu Nie
- Clinical Research Institute, First People's Hospital of Foshan, Foshan, Guangdong, 528000, China
| | - Wei Chen
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Yong Kang
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Xue Yuan
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Yongjiang Li
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Jun Zhou
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Wei Tao
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA.
| | - Xiaoyuan Ji
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China; Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA.
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Dubus J, Leonhardt N, Latrille C. Multi-cation exchanges involved in cesium and potassium sorption mechanisms on vermiculite and micaceous structures. Environ Sci Pollut Res Int 2023; 30:1579-1594. [PMID: 35918581 DOI: 10.1007/s11356-022-22321-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Vermiculite and micaceous minerals are relevant Cs+ sorbents in soils and sediments. To understand the bioavailability of Cs+ in soils resulting from multi-cation exchanges, sorption of Cs+ onto clay minerals was performed in batch experiments with solutions containing Ca2+, Mg2+, and K+. A sequence between a vermiculite and various micaceous structures has been carried out by conditioning a vermiculite at various amounts of K. Competing cation exchanges were investigated as function of Cs+ concentration. The contribution of K+ on trace Cs+ desorption is probed by applying different concentrations of K+ on Cs-doped vermiculite and micaceous structures. Cs sorption isotherms at chemical equilibrium were combined with elemental mass balances in solution and structural analyses. Cs+ replaces easily Mg2+ > Ca2+ and competes scarcely with K+. Cs+ is strongly adsorbed on the various matrix, and a K/Cs ratio of about a thousand is required to remobilize Cs+. Cs+ is exchangeable as long as the clay interlayer space remains open to Ca2+. However, an excess of K+, as well as Cs+, in solution leads to the collapse of the interlayer spaces that locks the Cs into the structure. Once K+ and/or Cs+ collapse the interlayer space, the external sorption sites are then particularly involved in Cs sorption. Subsequently, Cs+ preferentially exchanges with Ca2+ rather than Mg2+. Mg2+ is extruded from the interlayer space by Cs+ and K+ adsorption, excluded from short interlayer space and replaced by Ca2+ as Cs+ desorbs.
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Affiliation(s)
- Julien Dubus
- Service d'Etude du Comportement Des Radionucléides, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
- CEA, CNRS, BIAM, Aix Marseille Université, 13108, Saint-Paul-Lez-Durance, France
| | - Nathalie Leonhardt
- CEA, CNRS, BIAM, Aix Marseille Université, 13108, Saint-Paul-Lez-Durance, France
| | - Christelle Latrille
- Service d'Etude du Comportement Des Radionucléides, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France.
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Baruah B, Phillips GD, Ferreira DR, Boone NJ, Mcnutt DA. Comparing Cs + binding affinity of Keggin type polyoxometalate and sodium Tetrakis(4-florophenyl)borate in solution and from Cs-doped pure phase vermiculite. J Environ Radioact 2022; 253-254:107008. [PMID: 36095854 DOI: 10.1016/j.jenvrad.2022.107008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/18/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
We assessed the aptitude of cesium (Cs+) binding by Keggin type polyoxometalates (POMs) and compared the results with the Cs+ binding by sodium tetrakis(4-fluorophenyl)-borate (Na-TFPB). In this work, we aimed to establish a system to treat radioactive Cs+ contaminated soil with POMs economically. We evaluated the effect of initial Cs+ concentration (0.1M) and precipitant (POMs and TFPB) concentrations (0.01M) on Cs+ precipitation. Our comparison of Cs+ precipitation by three different POMs and TFPB was obtained by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). We synthesized POMs molybdovanadophosphoric acid, H5PMo10V2O40 (MVPA), and silicotungstic acid, H4SiW12O40 (STA), and used commercially available phosphotungstic acid, H3PW12O40 (PTA), and TFPB. Cs-doped pure phase vermiculite was also used to demonstrate the extraction potential of Cs+ by TFPB, STA, and PTA. All the POMs and corresponding Cs-bound POMs were characterized by UV-visible spectroscopy, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray powder diffraction (XRD). In this simulation study, we demonstrated that the Cs+ removal by POMs is much more effective than TFPB and could be a promising method for the treatment of radiocesium contaminated soil.
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Affiliation(s)
- Bharat Baruah
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA, 30144-5591, USA.
| | - Grayson D Phillips
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA, 30144-5591, USA
| | - Daniel R Ferreira
- Department of Ecology, Evolution, & Organismal Biology Kennesaw State University, Kennesaw, GA, 30144, USA
| | - Nathan J Boone
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA, 30144-5591, USA
| | - Derek A Mcnutt
- Department of Ecology, Evolution, & Organismal Biology Kennesaw State University, Kennesaw, GA, 30144, USA
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11
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Neves HSDC, da Silva TL, da Silva MGC, Guirardello R, Vieira MGA. Ion exchange and adsorption of cadmium from aqueous media in sodium-modified expanded vermiculite. Environ Sci Pollut Res Int 2022; 29:79903-79919. [PMID: 35034307 DOI: 10.1007/s11356-021-16841-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 09/27/2021] [Indexed: 06/14/2023]
Abstract
The use of mineral clays as alternative adsorbent has received attention due to their physicochemical characteristics, superficial negative charge, abundance of vermiculite (especially in Brazil), low cost, and chemical composition, which allows the material modification to increase the adsorptive capacity. This manuscript evaluated the use of expanded vermiculite (EV) and sodium-modified vermiculite (VNa) in the adsorption and ion exchange of Cd2+ ions. The sodification was successfully carried out making the ion exchange capacity greater in the modified clay, confirmed by EDX, cation exchange capacity (CEC), DRX, and FTIR analysis. The CEC was 210 and 233 mEq/100 g for the EV and VNa, respectively, with 97.8% exchangeable ion (Na+) in the VNa. FTIR spectra showed small variations in the groups related to ion exchange and XRD analysis indicated changes in the distance of the layers with loss of crystallinity after clay modification, which was recovered after cadmium adsorption. The kinetics became faster with an equilibrium time of 10 min for VNa and 45 min for EV. Cd2+ removal by vermiculite above 99% was achieved. Pseudo-second order model best described the kinetics, in which the resistance to mass transfer in external film is the limiting step of the process and, once this resistance is overcome, the ion exchange happens quickly. Despite the decrease in surface area after sodification, the adsorptive capacity increased 158% in the sodified adsorbent, from 0.107 mmol/g for EV to 0.276 mmol/g for VNa, under the evaluated conditions.
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Affiliation(s)
- Henrique Santana de Carvalho Neves
- Department of Processes and Products Design, School of Chemical Engineering, University of Campinas, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
| | - Thiago Lopes da Silva
- Department of Processes and Products Design, School of Chemical Engineering, University of Campinas, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil.
| | - Meuris Gurgel Carlos da Silva
- Department of Processes and Products Design, School of Chemical Engineering, University of Campinas, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
| | - Reginaldo Guirardello
- Department of Processes and Products Design, School of Chemical Engineering, University of Campinas, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
| | - Melissa Gurgel Adeodato Vieira
- Department of Processes and Products Design, School of Chemical Engineering, University of Campinas, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
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12
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Wu M, Wang Q, Wang C, Zeng Q, Li J, Wu H, Wu B, Xu H, Qiu Z. Strategy for enhancing Cr(VI)-contaminated soil remediation and safe utilization by microbial-humic acid- vermiculite-alginate immobilized biocomposite. Ecotoxicol Environ Saf 2022; 243:113956. [PMID: 35964397 DOI: 10.1016/j.ecoenv.2022.113956] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/21/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Bioreduction is an efficient approach to in-situ remediate Cr(VI)-contaminated soil, but further strengthening methods are still urgently needed. Herein, a novel immobilized biocomposite (B-HA-VE-SA) was successfully synthesized by embedding a efficient strain Bacillus sp. CRB-7 with humic acid (HA) combined vermiculite (VE) and sodium alginate (SA). The performance and enhancement mechanism of the immobilized biocomposite on remediating Cr(VI)-contaminated soil were also investigated by analyzing the whole-genome of CRB-7, Cr(VI) detoxification, soil microecological regulation, and subsequent crop growth response. Genomic annotation demonstrated that CRB-7 contains multiple genes contributed to Cr(VI) tolerance, Cr(VI) reduction and other metals resistance. Results showed that embedded CRB-7 biocomposites exhibited more effective reduction of Cr(VI) in soil compared with control and free CRB-7 treatment, especially B-HA-VE-SA achieved the highest Cr(VI) removal efficiency (96.18%) and the residual Cr proportion (49.04%) via multiple mechanisms including carrier effects, nutrient sustained-release, and electron-shuttle effect enhanced the bioremediation process. Furthermore, the synergies of CRB-7 and immobilizers (HA, VE and SA) significantly improved soil microecology (soil enzyme activities, microbial quantity and diversity), and engendered the evolution of microbial community composition and functional pathways. Consequently, pot experiments (Brassica napus L.) verified the plant-growth-promoting (12.00-18.00% and 43.82-69.00% higher in emergence rate and biomass) and Cr-accumulation-reducing effects (19.47-91.09% and 29.11-89.80% lower in root and aerial parts) of free and immobilized CRB-7. Taken together, these findings highlighted the superiority of B-HA-VE-SA in simultaneous remediation, microecological improvement and safe utilization of Cr(VI)-contaminated soil.
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Affiliation(s)
- Minghui Wu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Qiqi Wang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Can Wang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Qilu Zeng
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Jianpeng Li
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Han Wu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Bin Wu
- College of Ecology and Environment, Chengdu University of Technology, 1# Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Heng Xu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
| | - Zhongping Qiu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China.
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13
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Ren S, Huang S, Liu B. Enhanced removal of ammonia nitrogen from rare earth wastewater by NaCl modified vermiculite: Performance and mechanism. Chemosphere 2022; 302:134742. [PMID: 35525451 DOI: 10.1016/j.chemosphere.2022.134742] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/30/2022] [Accepted: 04/23/2022] [Indexed: 06/14/2023]
Abstract
Wastewater from rare earth mining (WREM) is very harmful to environment and human health due to its high concentration of ammonia nitrogen (NH3-N). It is therefore necessary and urgent to find a low-cost and convenient technique to remove high concentration of NH3-N from WREM. In this study, Natural powdered vermiculite (NV) was modified with seven sodium chloride (NaCl) solutions, and seven kinds of sodium chloride modified vermiculite (Na-V) were obtained. The NH3-N adsorption performance of Na-V is greatly improved compared with NV. Among them, vermiculite modified with 180 g/L NaCl yielded the highest ammonium adsorption capacity (Qm, 11.569 mg/g), which was 63.43% higher than NZ (Qm, 7.079 mg/g). The characterizations of 180-Na-V confirmed the removal mechanism of NH3-N that the improved capacity of modified vermiculite was attributed to its higher mesoporous volume and ion-exchange capacity, which are the result of sodium-ion exchange and Interlayer effect from high concentration of NaCl. The adsorption isotherms and kinetics were respectively best consistent with Langmuir model and the pseudo-second-order (PSO) model. The adsorption capacity (3.808 mg/g) of vermiculite after 5 cycles could still maintain 75.09% of the initial adsorption capacity (5.071 mg/g). A large amount of Na-V had little effect on pH of water, which meet the requirements of practical application. Including pH, dosage, coexisting ions, the effects of other factors on ammonium adsorption were also determined. This study provides a new method for vermiculite to remove high concentration of NH3-N.
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Affiliation(s)
- Shigang Ren
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China.
| | - Shaoyong Huang
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China
| | - Baixiong Liu
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China.
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Herr S, Leybros A, Barre Y, Nikitenko S, Pflieger R. Desorption of Cs from vermiculite by ultrasound assisted ion exchange. Chemosphere 2022; 303:135175. [PMID: 35671818 DOI: 10.1016/j.chemosphere.2022.135175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/13/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
Nuclear power plant accidents typically lead to the contamination of large volumes of soils with radioactive cesium. This element is hard to desorb from soil, especially when it is bound to mica minerals, and aggressive and energy-consuming techniques are often required. In this study, we investigated the use of ultrasound with Mg2+ cation exchange for the removal of a133Cs-contaminated vermiculite over a wide range of temperatures (20-200 °C). At room temperature, ultrasound was found to significantly accelerate Cs desorption but only reversibly adsorbed Cs species were removed. Under hydrothermal conditions and ultrasonic irradiation in contrast, the removal efficiency after 1 h was 50% at 100 °C and more than 95% at 200 °C, compared with only 50% without ultrasonication at 200 °C. Cs contamination can therefore be nearly totally removed, even from collapsed vermiculite sites where sorption is considered irreversible. Ultrasound waves and high temperatures both make trapped Cs more accessible by spreading the sheets and improving mass transfer. Acoustic noise spectra show that even at high pressure and temperature, cavitation bubbles form, oscillate and collapse, with the desired physical effects. These results demonstrate the potential of synergistic ultrasound and hydrothermal treatment for soil remediation.
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Affiliation(s)
- Sophie Herr
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France
| | | | - Yves Barre
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | - Sergueï Nikitenko
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France
| | - Rachel Pflieger
- ICSM, Univ Montpellier, UMR 5257, CEA, CNRS, ENSCM, Marcoule, France.
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15
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Bai G, Luo F, Zou Y, Liu Y, Wang R, Yang H, Liu Z, Chang J, Wu Z, Zhang Y. Effects of vermiculite on the growth process of submerged macrophyte Vallisneria spiralis and sediment microecological environment. J Environ Sci (China) 2022; 118:130-139. [PMID: 35305761 DOI: 10.1016/j.jes.2021.08.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 06/14/2023]
Abstract
Ecological restoration is one of the hot technologies for the reconstruction of eutrophic lake ecosystems in which the restoration and propagation of submerged plants is the key and difficult step. In this paper, the effect of vermiculite on the growth process of Vallisneria spiralis and sediment microenvironment were investigated, aiming to provide a theoretical basis for the application of vermiculite in aquatic ecological restoration. Results of growth indexes demonstrated that 5% and 10% vermiculite treatment groups statistically promote the growth of Vallisneria spiralis compared to the control. Meanwhile, the results of ecophysiological indexes showed that photosynthetic pigment, soluble sugar content, superoxide dismutase (SOD), and catalase (CAT) activity of 5% and 10% group were increased compared with the control while the malondialdehyde (MDA) content exhibited the opposite result (p < 0.05), which illustrated that vermiculite can improve the resistance of plants and delay the aging process of Vallisneria spiralis. In addition, result of PCA (Principal Component Analysis) demonstrated 5% and 10% group has improved the sediment physical conditions and create more ecological niche for microorganisms directly, and then promoted the growth of plants. The dissolution results showed that vermiculite can dissolve the constant and trace elements needed for plant growth. Furthermore, the addition of vermiculite increased the diversity of microorganisms in the sediments, and promoted the increase of plant growth-promoting bacteria and phosphorus-degrading bacteria. This study could provide a technique reference for the further application of vermiculite in the field of ecological restoration.
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Affiliation(s)
- Guoliang Bai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Feng Luo
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Yilingyun Zou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunli Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rou Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hang Yang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Zisen Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Junjun Chang
- School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Węgrzyn A, Tsurtsumia A, Witkowski S, Freitas O, Figueiredo S, Cybińska J, Stawiński W. Vermiculite as a potential functional additive for water treatment bioreactors inhibiting toxic action of heavy metal cations upsetting the microbial balance. J Hazard Mater 2022; 433:128812. [PMID: 35398796 DOI: 10.1016/j.jhazmat.2022.128812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/25/2022] [Accepted: 03/26/2022] [Indexed: 06/14/2023]
Abstract
A new adsorbent that combines mineral vermiculite with the yeast Saccharomyces cerevisiae, was used for Cd2+ removal. The influence of vermiculite presence on the toxic effects of Cd2+ to Saccharomyces cerevisiae yeast was evaluated as a function of the microorganisms' respiratory activity (CO2 production). The Cd2+ toxicity increased with prolonged exposure time reaching the LC50 value of 857 and 489 mg L-1 after 30 and 120 min, respectively. The yeast managed to bioaccumulate 25.0 ± 0.6 mg g-1 of Cd2+ at the initial Cd2+ concentration of 741.9 mg L-1; the maximum Cd2+ adsorption capacity of vermiculite reached 25 ± 5 mg g-1. The addition of the mineral decreased the cations toxic effect; the LC20 value in vermiculite absence attained approximately 200 mg L-1 after 30 min and decreased to 80 mg L-1 after 2 h, while in the bio-mineral system it was at the level of 435 ± 50 mg L-1 without a significant change in time. The mineral provided a superior living environment for the yeast by removing part of the cations, releasing essential microelements and providing a protective, clay hutch-like habitat for the cells.
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Affiliation(s)
- Agnieszka Węgrzyn
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Avtandil Tsurtsumia
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; Ilia State University, School of Natural Since and Engineering, Sustainable Natural And Forest Resources Management (MBA), Kakutsa Cholokashvili Ave 3/5, Tbilisi 0162, Georgia.
| | - Stefan Witkowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
| | - Olga Freitas
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Sónia Figueiredo
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Joanna Cybińska
- Faculty of Chemistry, University of Wroclaw, ul. F. Joliot-Curie 14, 50-383 Wroclaw, Poland; Łukasiewicz Research Network, PORT Polish Center for Technology Development, Stabłowicka 147, 54-066 Wrocław, Poland.
| | - Wojciech Stawiński
- Łukasiewicz Research Network, PORT Polish Center for Technology Development, Stabłowicka 147, 54-066 Wrocław, Poland.
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Rosa MIG, Boga GA, Cruz SSV, Andrade FRDD, Furquim SAC, Shinzato MC. Mechanisms of chromium(VI) removal from solution by zeolite and vermiculite modified with iron(II). Environ Sci Pollut Res Int 2022; 29:49724-49738. [PMID: 35218482 DOI: 10.1007/s11356-022-19366-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Mechanisms of Cr(VI) reduction by Fe(II) modified zeolite (clinoptilolite/mordenite) and vermiculite were evaluated. Adsorbents were treated with Fe(SO4)·7H2O to saturate their exchange sites with Fe(II). However, this treatment decreased their CEC and pHPZC, probably due to the dealumination process. Vermiculite (V-Fe) adsorbed more Fe(II) (21.8 mg g-1) than zeolite (Z-Fe) (15.1 mg g-1). Z-Fe and V-Fe were used to remove Cr(VI) from solution in a batch test to evaluate the effect of contact time and the initial concentration of Cr(VI). The Cr(VI) was 100% reduced to Cr(III) by Z-Fe and V-Fe in solution at 18 mg L-1 Cr(VI) after 1 min. Considering that 3 mol of Fe(II) are required to reduce 1 mol of Cr(VI) (3Fe+2 + Cr+6 → 3Fe+3 + Cr+3), the iron content released from Z-Fe and V-Fe was sufficient to reduce 100% of the Cr(VI) in solutions up to 46.8 mg L-1 Cr(VI) and about 90% (V-Fe) and 95% (Z-Fe) at 95.3 mg L-1 Cr(VI). The Fe(II), Cr(III), Cr(VI), and K+ contents of the adsorbents and solutions after the batch tests indicated that the K+ ions from the [Formula: see text] solution were the main cation adsorbed by Z-Fe, while vermiculite did not absorb any of these cations. The H+ of the acidic solution (pH around 5) may have been adsorbed by V-Fe. The release of Fe(II) from Z-Fe and V-Fe involved cation exchange between K+ and H+ ions from solution, respectively. The reduction of Cr(VI) by Fe(II) resulted in the precipitation of Cr(III) and Fe(III) and a decrease in the pH of the solution to < 5. As acidity limits the precipitation of Cr(III) ions, they remained in solution and were not adsorbed by either adsorbent (since they prefer to adsorb K+ and H+). To avoid oxidation, Cr(III) can be removed by precipitation or the adsorption by untreated minerals.
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Affiliation(s)
- Maria Isabel Garcia Rosa
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, São Paulo State, CEP 09913-030, Brazil
| | - Gabriella Andrade Boga
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, São Paulo State, CEP 09913-030, Brazil
| | - Suellen Silva Vieira Cruz
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, São Paulo State, CEP 09913-030, Brazil
| | - Fabio Ramos Dias de Andrade
- Instituto de Geociências da Universidade de São Paulo, Rua do Lago, 562, Cidade Universitária, São Paulo (SP), CEP 05508-080, Brazil
| | - Sheila Aparecida Correia Furquim
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, São Paulo State, CEP 09913-030, Brazil
| | - Mirian Chieko Shinzato
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo, Rua São Nicolau, 210, Diadema, São Paulo State, CEP 09913-030, Brazil.
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18
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Shen T, Han T, Zhao Q, Ding F, Mao S, Gao M. Efficient removal of mefenamic acid and ibuprofen on organo-Vts with a quinoline-containing gemini surfactant: Adsorption studies and model calculations. Chemosphere 2022; 295:133846. [PMID: 35120953 DOI: 10.1016/j.chemosphere.2022.133846] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/24/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
To pursue the adsorptivity of versatile vermiculite (Na-Vt)-based adsorbent targeted at emerging pharmaceuticals (mefenamic acid and ibuprofen, corresponding to MEA and IBP, respectively), a quinoline-based gemini surfactant (DHQU) with multi-functional groups is applied as modifier on Na-Vt. Enhanced hydrophobicity, enlarged interlayer space and decreased surface area of DHQU-Vt are obtained, whose modifier availability (the mole ratio of modifier intercalated to added) reaches up to 84.18% as characterized by FT-IR, XRD, TG-DTG, EA and BET analysis. Efficient adsorption of MEA/IBP (123.71/240.69 mg/g) is achieved under an extremely low DHQU dosage (0.2 CEC lower than the usual saturated dosage of organo-Vts), with all the processes fitting satisfactorily with pseudo-second order and Freundlich isotherm models accompanied by an exothermic nature. Acid pickling testifies a stable and reliable reusability process of DHQU-Vt even after 3 cycles. Multiple interactions (i.e., partition process, XH-π interaction, π-π interaction, π-π stacking and electrostatic interaction) are revealed and compared from not only characterization results, but also simulation of frontier orbital analysis, the adsorption configuration and bonding analysis: (i) The greater molecular flexibility of the adsorbate, the greater intra particle diffusion effect. (ii) π-π stacking between isolated aromatic rings is stronger than that between parallelly connected aromatic rings. (iii) The strength of multiple active sites provided by quinoline (CH-π, NH-π and π-π interactions) are comparable but weaker than electrostatic interaction/intra particle diffusion.
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Affiliation(s)
- Tao Shen
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, 102249, PR China.
| | - Tong Han
- Unconventional Natural Gas Institute, China University of Petroleum, Beijing, 102249, PR China.
| | - Qing Zhao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, 102249, PR China.
| | - Fan Ding
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, 102249, PR China.
| | - Shanshan Mao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, 102249, PR China.
| | - Manglai Gao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, 102249, PR China.
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19
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Şenol ZM, Kaya S, Şimşek S, Katin KP, Özer A, Marzouki R. Synthesis and characterization of chitosan- vermiculite-lignin ternary composite as an adsorbent for effective removal of uranyl ions from aqueous solution: Experimental and theoretical analyses. Int J Biol Macromol 2022:S0141-8130(22)00834-0. [PMID: 35461866 DOI: 10.1016/j.ijbiomac.2022.04.128] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/08/2022] [Accepted: 04/17/2022] [Indexed: 12/25/2022]
Abstract
Chitosan (Ch), vermiculite (V) and lignin (L) were used as the components of a natural composite adsorbent (Ch-VL) for the removal of the UO22+ ions in aqueous solutions. During the study, we recorded and analyzed the initial UO22+ ion concentration, initial pH, contact time, temperature, and recovery. The recycling performance of the Ch-VL composite was assessed by three sequential adsorption/desorption experiments. Adsorption performance of the Ch-VL composite for UO22+ ions was 600 mg L-1 at pH 4.5 and temperature of 25 °C. Thermodynamic findings, ΔH0:28.1 kJ mol-1, and ΔG0:-14.1 kJ mol-1 showed that adsorption behavior was endothermic and spontaneous. Its maximum adsorption capacity was 0.322 mol kg-1, obtained from the Langmuir isotherm model. The adsorption kinetics indicated that it followed the pseudo-second-order and intraparticle diffusion rate kinetics. The adsorption thermodynamic shown indicated that the UO22+ ion adsorption was both spontaneous and endothermic. The adsorption process was enlightened by FT-IR and SEM-EDX analyses. The study suggested a simple and cost-effective approach for the removal of toxic UO22+ ions from wastewater. To highlight the adsorption mechanism, DFT calculations were performed. Theoretical results are in good agreement with experimental observations.
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20
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Latrille C, Bildstein O. Cs selectivity and adsorption reversibility on Ca-illite and Ca- vermiculite. Chemosphere 2022; 288:132582. [PMID: 34687680 DOI: 10.1016/j.chemosphere.2021.132582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
For understanding and predicting the Cs behavior in soils and groundwater, Cs adsorption properties of illite and vermiculite were investigated under various pH conditions and Cs concentrations. Cs adsorption and desorption experiments have been conducted with Ca-homoionic illite and Ca-vermiculite in CaCl2 solution with an ionic strength of 0.03 and of 0.06 mol.L-1 respectively, by focusing on cation exchanges between Cs, proton and calcium at thermodynamic equilibrium. Ca-illite displayed more affinity for Cs than Ca-vermiculite. Cs adsorption was non-linear for both clay minerals and a multi-site exchange model approach was adopted to interpret and model adsorption isotherms. Each mineral reactivity was described by their sorption site properties expressed by their exchange capacity and ionic selectivity. High-selective and low-capacity sites were shown to control Cs uptake at concentrations below 10-8-10-7 mol.L-1 for both Ca-illite and Ca-vermiculite. Three high-capacity sites dominated Cs adsorption at higher concentrations. Cs adsorption reversibility was demonstrated for illite at Ca concentrations ranging from 5 10-2 to 10-9 mol.L-1. The partial irreversibility of Cs adsorption onto vermiculite at Cs concentrations greater than 10-5 mol.L-1 was related to interlayer collapse. Reversible adsorption may occur as long as the interlayer space stays open. The irreversible adsorbed fraction was quantified and taken into account in the modeling approach to calculate the selectivity coefficient of each site.
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Affiliation(s)
- Christelle Latrille
- Université Paris-Saclay, CEA, Service d'Etude du Comportement des Radionucléides, 91191, Gif-sur-Yvette, France.
| | - Olivier Bildstein
- CEA-DES-IRESNE-DTN Cadarache, F-13108, Saint-Paul-Lez-Durance, France
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21
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Dong Y, Zeng W, Lin H, Yang Y. Preparation of Fe 2O 3-coated vermiculite composite by hydrophobic agglomeration and its application in As/Cd co-contaminated soil. Environ Technol 2022; 43:83-94. [PMID: 32475297 DOI: 10.1080/09593330.2020.1777589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Exploring an economic and efficient method for simultaneous passivation of As and Cd in soils is of great current significance. In this study, a low-cost composite material, Fe2O3-vermiculite (Fe-V), for effectively passivating As/Cd was synthesized successfully based on hydrophobic aggregation method. The reaction products were characterized by XRD, SEM, EDS and FTIR, results showed that Fe2O3 was successfully loaded onto the surface of vermiculite by the connection with sodium stearate and employed this composite material to passivate the co-contaminated soil with As/Cd. All the percentage of toxicity reduction (Pd value) was higher than the control group, which indicated the passivation was effective. In soil A (As 45 mg/kg and Cd 6 mg/kg), the Pd of As were higher than 90%, the Pd of Cd were 80-100%. And in soil B (As 80 mg/kg and Cd 10 mg/kg), the Pd of As were more than 84.68%, the Pds of Cd were about 99%. In the meantime, the application of Fe-V could apparently increase the residual fraction of As and Cd in soil A and soil B. Moreover, the passivation of As and Cd in soils by Fe-V composite materials was a combined physical and chemical action system. This research shows that Fe-V could play a good role in the passivation of As/Cd in different pollution levels of soils.
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Affiliation(s)
- Yingbo Dong
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, People's Republic of China
- Beijing Key Laboratory on Resource-Oriented Treatment of Industrial Pollutants, Beijing, People's Republic of China
| | - Weihong Zeng
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, People's Republic of China
| | - Hai Lin
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, People's Republic of China
- Beijing Key Laboratory on Resource-Oriented Treatment of Industrial Pollutants, Beijing, People's Republic of China
| | - Yueqing Yang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, People's Republic of China
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22
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Ur Rehman Z, Huh SH, Ullah Z, Pan YT, Churchill DG, Koo BH. LBL generated fire retardant nanocomposites on cotton fabric using cationized starch-clay-nanoparticles matrix. Carbohydr Polym 2021; 274:118626. [PMID: 34702452 DOI: 10.1016/j.carbpol.2021.118626] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 11/16/2022]
Abstract
In this work, starch-clay-TiO2-based nanocomposites were deposited on cotton fabric through layer-by-layer (LBL) process and their effect on the flame retardancy, inhibition of pyrolysis and combustion processes were discussed in details. Polyelectrolyte solutions/suspensions of cationized starch and VMT (vermiculite)/TiO2 nanoparticles were used to deposit these nanocomposites in the form of multi-layered coatings (5, 7, 10 and 15 bilayers). Uniform fabric coverage and presence of electrolytes was imaged by scanning electron microcopy (LV-SEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and EDX characterizations. The greatest pyrolysis reduction was found for the StVT-7 sample (7 bilayers); ~30% and 21%, based on microscale combustion calorimetry (MCC) and thermogravimetric analysis (TGA). When using MCC, the improved values of the PHRR ~ 193 W/g, THR ~ 10.7 kJ/g), HRC ~ 390 J/g∙K and LOI ~ 22.2% were found for the StVT-7 sample which was strongly supported by the UL-94 test.
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Affiliation(s)
- Zeeshan Ur Rehman
- College of Mechatronic Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea
| | - Seok-Hwan Huh
- College of Mechatronic Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea
| | - Zakir Ullah
- Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
| | - Ye-Tang Pan
- National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - David G Churchill
- Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea.
| | - Bon Heun Koo
- College of Mechatronic Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea.
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Krzesińska AM, Bultel B, Loizeau D, Craw D, April R, Poulet F, Werner SC. Mineralogical and Spectral (Near-Infrared) Characterization of Fe-Rich Vermiculite-Bearing Terrestrial Deposits and Constraints for Mineralogy of Oxia Planum, ExoMars 2022 Landing Site. Astrobiology 2021; 21:997-1016. [PMID: 34406809 DOI: 10.1089/ast.2020.2410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Oxia Planum is a Noachian plain on Mars. It was chosen as the final landing site for in situ studies by ExoMars 2022 rover. The main scientific objectives of the mission are to understand the mineralogy and aqueous evolution of ancient Mars with relevance to habitability. Oxia is covered by vast deposits of Fe,Mg-phyllosilicates, but the exact nature of these deposits is not yet fully understood. We performed a survey of potential terrestrial analog rocks, and here we show combined mineralogical characterization of these rocks with their near-infrared spectral analysis. Samples from two terrestrial sites were studied: (1) vermiculitized chlorite-schists from Otago, New Zealand, which underwent an alteration process without significant oxidation; and (2) basaltic tuffs from Granby, Massachusetts, USA, with Fe-rich clays filling amygdales of supposedly hydrothermal origin. Both analogues are incorporated into the newly built Planetary Terrestrial Analogue Library (PTAL) collection. Oxia bedrock clay-rich deposits are spectrally matched best by a well-crystallized trioctahedral vermiculite/saponite mixture from the basaltic tuff, although the contribution of saponite must be minor. Otago vermiculite is a good analogue to Oxia vermiculite in terms of overall mineralogy and Fe content. However, spectral inconsistencies related to the Al content in the Otago clays indicate that illitization of vermiculite, which results from postalteration oxidation, did not occur at Oxia. This implies limited water/rock interactions and reducing conditions during deposition of sediments now constituting the bedrock at Oxia. Whereas the spectral match does not conclusively imply the mineralogy, trioctahedral vermiculite should be considered a likely mineral component of the bedrock unit at Oxia Planum. Vermiculite has great potential to store organic matter, and the postdeposition geological context of Oxia Planum derived from understanding of environmental conditions in analog sites is promising for organic matter preservation.
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Affiliation(s)
- Agata M Krzesińska
- Centre for Earth Evolution and Dynamics (CEED), Department of Geosciences, University of Oslo, Oslo, Norway
| | - Benjamin Bultel
- Centre for Earth Evolution and Dynamics (CEED), Department of Geosciences, University of Oslo, Oslo, Norway
| | - Damien Loizeau
- Institut d'Astrophysique Spatiale, Université Paris-Sud, Orsay, France
| | - David Craw
- Geology Department, University of Otago, Dunedin, New Zealand
| | - Richard April
- Geology Department, Colgate University, Hamilton, New York, USA
| | - François Poulet
- Institut d'Astrophysique Spatiale, Université Paris-Sud, Orsay, France
| | - Stephanie C Werner
- Centre for Earth Evolution and Dynamics (CEED), Department of Geosciences, University of Oslo, Oslo, Norway
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24
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Akemoto Y, Sakti SCW, Kan M, Tanaka S. Interpretation of the interaction between cesium ion and some clay minerals based on their structural features. Environ Sci Pollut Res Int 2021; 28:14121-14130. [PMID: 33210248 DOI: 10.1007/s11356-020-11476-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 10/28/2020] [Indexed: 06/11/2023]
Abstract
Cesium (Cs+) is known to have a strong interaction with various clay minerals; however, it is not interpreted from the structure of clay minerals and the adsorption isotherm. The adsorption interactions between Cs+ and hydrobiotite (H-Bio), biotite (Bio), vermiculite (Verm), and exfoliated vermiculite (E-Verm) were evaluated by analyzing adsorption isotherm, basal spacing, and adsorption/desorption experiments. The Cs+ adsorption of H-Bio and Verm fitted well to the Langmuir adsorption isotherm, while the Cs+ adsorption of Bio and E-Verm fitted well to the Freundlich adsorption isotherm. The basal spacing of H-Bio and Verm was approximately 1.4 nm, while Bio and E-Verm basal spacing was 1.0 nm. The adsorption experiment results for Cs+ under the coexistence of Ca2+ and K+ indicated that the contribution of the interlayer sites to Cs+ adsorption on H-Bio and Verm was 25-40%, while the contribution of the interlayer sites to that on Bio and E-Verm was almost 0%. The adsorption isotherms reflected this interlayer contribution to Cs+ adsorption, which was dependent on the basal spacing. Therefore, the basal spacing of clay minerals is one of the key structural properties controlling both the adsorption capacity and the adsorption mechanism of Cs+ in clay minerals.
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Affiliation(s)
- Yasuhiro Akemoto
- Graduate School of Environmental Science, Hokkaido University, Kita 10 Nishi 5, Kita-ku, Sapporo, 060-0810, Japan.
- Research Institute of Energy, Environment and Geology, Industrial Technology and Environment Research Department, Hokkaido Research Organization, Kita 19 Nishi 11, Kita-ku, Sapporo, 060-0819, Japan.
| | - Satya Candra Wibawa Sakti
- Graduate School of Environmental Science, Hokkaido University, Kita 10 Nishi 5, Kita-ku, Sapporo, 060-0810, Japan
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Campus C, Mulyorejo, Surabaya, 60115, Indonesia
- Supramodification Nano-Micro Engineering Research Group, Universitas Airlangga, Campus C, Mulyorejo, Surabaya, 60115, Indonesia
| | - Masahiko Kan
- Environmental Information Measurement Sciences, Hokkaido University of Education Sapporo, Ainosato 5-3, Kita-ku, Sapporo, 002-8502, Japan
| | - Shunitz Tanaka
- Graduate School of Environmental Science, Hokkaido University, Kita 10 Nishi 5, Kita-ku, Sapporo, 060-0810, Japan.
- Faculty of Environmental Earth Science, Hokkaido University, Kita 10 Nishi 5, Kita-ku, Sapporo, 060-0810, Japan.
- ES General Laboratory Co., Nakanuma Nishi 5-1-8-1, Higashi-ku, Sapporo, Hokkaido, 007-0895, Japan.
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25
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Zhao S, Wang H, Liu K, Li L, Yang J, An X, Li P, Yun L, Zhang Z. The role of JrPPOs in the browning of walnut explants. BMC Plant Biol 2021; 21:9. [PMID: 33407138 PMCID: PMC7789580 DOI: 10.1186/s12870-020-02768-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Tissue culture is an effective method for the rapid breeding of seedlings and improving production efficiency, but explant browning is a key limiting factor of walnut tissue culture. Specifically, the polymerization of PPO-derived quinones that cause explant browning of walnut is not well understood. This study investigated explants of 'Zanmei' walnut shoot apices cultured in agar (A) or vermiculite (V) media, and the survival percentage, changes in phenolic content, POD and PPO activity, and JrPPO expression in explants were studied to determine the role of PPO in the browning of walnut explants. RESULTS The results showed that the V media greatly reduced the death rate of explants, and 89.9 and 38.7% of the explants cultured in V media and A media survived, respectively. Compared with that of explants at 0 h, the PPO of explants cultured in A was highly active throughout the culture, but activity in those cultured in V remained low. The phenolic level of explants cultured in A increased significantly at 72 h but subsequently declined, and the content in the explants cultured in V increased to a high level only at 144 h. The POD in explants cultured in V showed high activity that did not cause browning. Gene expression assays showed that the expression of JrPPO1 was downregulated in explants cultured in both A and V. However, the expression of JrPPO2 was upregulated in explants cultured in A throughout the culture and upregulated in V at 144 h. JrPPO expression analyses in different tissues showed that JrPPO1 was highly expressed in stems, young leaves, mature leaves, catkins, pistils, and hulls, and JrPPO2 was highly expressed in mature leaves and pistils. Moreover, browning assays showed that both explants in A and leaf tissue exhibited high JrPPO2 activity. CONCLUSION The rapid increase in phenolic content caused the browning and death of explants. V media delayed the rapid accumulation of phenolic compounds in walnut explants in the short term, which significantly decreased explants mortality. The results suggest that JrPPO2 plays a key role in the oxidation of phenols in explants after branch injury.
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Affiliation(s)
- Shugang Zhao
- College of Life Sciences, Hebei Agricultural University, Baoding, 071001, China.
| | - Hongxia Wang
- Mountainous Areas Research Institute of Hebei, Baoding, 071001, China
- National Engineering Reseach Center for Agriculture in North Mountainours areas, Baoding, 071001, China
| | - Kai Liu
- College of Horticulture, Hebei Agricultural University, Baoding, 071001, China
| | - Linqing Li
- Mountainous Areas Research Institute of Hebei, Baoding, 071001, China
- National Engineering Reseach Center for Agriculture in North Mountainours areas, Baoding, 071001, China
| | - Jinbing Yang
- College of Life Sciences, Hebei Agricultural University, Baoding, 071001, China
| | - Xiuhong An
- Mountainous Areas Research Institute of Hebei, Baoding, 071001, China
- National Engineering Reseach Center for Agriculture in North Mountainours areas, Baoding, 071001, China
| | - Pingping Li
- College of Life Sciences, Hebei Agricultural University, Baoding, 071001, China
| | - Linying Yun
- College of Life Sciences, Hebei Agricultural University, Baoding, 071001, China
| | - Zhihua Zhang
- Mountainous Areas Research Institute of Hebei, Baoding, 071001, China.
- National Engineering Reseach Center for Agriculture in North Mountainours areas, Baoding, 071001, China.
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26
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Li F, Wan Y, Chen J, Hu X, Tsang DCW, Wang H, Gao B. Novel ball-milled biochar- vermiculite nanocomposites effectively adsorb aqueous As(Ⅴ). Chemosphere 2020; 260:127566. [PMID: 32663674 DOI: 10.1016/j.chemosphere.2020.127566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/17/2020] [Accepted: 06/27/2020] [Indexed: 05/22/2023]
Abstract
Ball milling was used to fabricate a nanocomposite of 20% hickory biochar (600 °C) and 80% expanded vermiculite (20%-BC/VE). This novel composite adsorbent had much higher removal of As(V) from aqueous solutions than ball-milled biochar and expanded vermiculite. Characterization of these adsorbents showed that the enhanced As(V) adsorption was ascribed to much larger surface area and pore volume (2-6 times), notable changes in crystallinity, activation of cations, and increased functional groups in the nanocomposite compared with the ball-milled products of their pristine counterparts. The As(V) adsorption process by the 20%-BC/VE fitted well with the pseudo-second-order kinetic model (R2= 0.990) and Langmuir isotherm model (R2= 0.989) with a maximum adsorption capacity of 20.1 mg g-1. The 20%-BC/VE best performed at pH about 6. The adsorption efficiency was not sensitive to the competition of NO3-, Cl-, SO42-, as well as the coexistence of humic acid. However, the adsorption capacity for As(V) was significantly reduced by coexisting with PO43-. The 20%-BC/VE composite can potentially serve as a superior low-cost adsorbent for As(V) removal in real-world applications.
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Affiliation(s)
- Fang Li
- College of Economics and Management, Shandong Agricultural University, Tai'an, 271018, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, USA
| | - Yongshan Wan
- Center for Environmental Measurement and Modeling, US EPA, Gulf Breeze, FL, 32561, USA
| | - Jianjun Chen
- Mid-Florida Research & Education Center, University of Florida, Apopka, FL, 32703, USA
| | - Xin Hu
- Center of Material Analysis, Nanjing University, Nanjing, 210093, PR China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong, 528000, China
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, USA.
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27
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Topka P, Soukup K, Hejtmánek V, Hlásenský I, Kaštánek F, Šolcová O. Remediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/ vermiculite sorbent for mercury vapor removal. Environ Sci Pollut Res Int 2020; 27:42182-42188. [PMID: 32888153 DOI: 10.1007/s11356-020-10696-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 08/31/2020] [Indexed: 06/11/2023]
Abstract
In this study, we report for the first time a novel type of sorbent that can be used for mercury adsorption from the air-based off-gasses-vermiculite impregnated with alkali polysulfides and thiosulfates. In contrast to other sorbents, vermiculite exhibits superior thermal stability in air and low adsorption capacity for organic vapors. This allows for a more favorable design of the soil remediation unit-direct coupling of thermal desorber with catalytic oxidizer using air as a carrier gas. In the bench-scale test at 180 °C, the sulfur/vermiculite sorbent exhibited significantly higher efficiency for the adsorption of mercury vapor from the off-gasses than the commercial sulfur/activated carbon sorbent at its highest operating temperature (120 °C). The average mercury concentration in the adsorber off-gas decreased from 1.634 mg/m3 for the sulfur/activated carbon to 0.008 mg/m3 achieved with impregnated vermiculite. The total concentration of organic compounds in the soil after thermal desorption was below the detection limit of the employed analytical method.
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Affiliation(s)
- Pavel Topka
- Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02, Praha, Czech Republic.
| | - Karel Soukup
- Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02, Praha, Czech Republic
| | - Vladimír Hejtmánek
- Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02, Praha, Czech Republic
| | - Ivo Hlásenský
- Dekonta, a.s., Dřetovice 109, 273 42, Stehelčeves, Czech Republic
| | - František Kaštánek
- Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02, Praha, Czech Republic
| | - Olga Šolcová
- Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 135, 165 02, Praha, Czech Republic
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28
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Zhou S, Wang M, Xiong X, Tan H, Lv Z, Wang X, Yang F. Effect of thermal expansion additives on alleviating the ash deposition of high-sodium coal. J Environ Manage 2020; 269:110799. [PMID: 32561008 DOI: 10.1016/j.jenvman.2020.110799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/24/2020] [Accepted: 05/16/2020] [Indexed: 06/11/2023]
Abstract
The high content of sodium in coal ash can induce severe ash deposit problems on heated surface. Vermiculite has been investigated to solve this problem in drop-tube furnace recently. In this work, the effects of vermiculite and perlite on appearances, inorganic mineral transformation, elemental composition change and Na capture efficiency of ash deposit were investigated. The results show that the molten deposit obtained by drop-tube furnace at 1373 K was transformed into weakly-condensed deposit and strongly-sticky deposit respectively when vermiculite and perlite were added separately. Vermiculite has a better effect on improving the ash deposition than perlite. The mechanism of alleviating the ash deposition by vermiculite and perlite is proposed as follows: (1) The interaction between ash particles is inhibited due to the combination reactions of thermal expansion additive particles with coal ash particles. (2) The coal ash particles attach to the surface and the gap of thermal expansion additive particles, forming a porous structure. (3) With vermiculite added, Mg2SiO4 (forsterite) increases the fusion point of ash deposit. NaCa2Mg4Al(Si6Al2)O22(OH)2 (pargasite) and Mg1.8Fe0.2SiO4 (forsterite ferroan) result in the weak viscosity of ash deposit. (4) With perlite added, silicate and sodium aluminosilicate in perlite react with coal ash to produce a large amount of amorphous substance, which can flow downwards to make the bottom deposit molten and lead to the strong viscosity of total deposit. (5) Vermiculite has a strong capacity for Na capture at 1023 K, and perlite has a strong capacity for Na capture at 1373 K.
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Affiliation(s)
- Shangkun Zhou
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China.
| | - Meng Wang
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Xiaohe Xiong
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Houzhang Tan
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China.
| | - Zhaomin Lv
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Xuebin Wang
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Fuxin Yang
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China
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29
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Ustaoglu A, Kurtoglu K, Gencel O, Kocyigit F. Impact of a low thermal conductive lightweight concrete in building: Energy and fuel performance evaluation for different climate region. J Environ Manage 2020; 268:110732. [PMID: 32510452 DOI: 10.1016/j.jenvman.2020.110732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
Evaluation of energy performance of a proposed lightweight concrete, a structural component, in a building application is a novel approach and significant attempt for the future of energy-efficient buildings. Buildings are one of the largest energy consumers in the world. Thermal protection in a building is the most effective way for energy saving. Many stimulatory measures for the spreading of energy savings technologies have been recently applied into the building sectors. In this study, an investigation was carried out based upon an experimental investigation to decide the thermal properties of the lightweight concrete with different ratios of vermiculite. Moreover, analytical simulation to evaluate the energy consumption in a real building application was carried out for various fuels and different climate regions of Turkey. The results show that the most significant reduction in the total heat need occurs in the 4th region, with about 5.6 kWh/m2-year for a thickness of 0.2 m. An energy-saving of 7.5% can be achieved in the 1st region. The proposed concrete can provide a significant reduction in energy consumption and can reduce the carbon emission related to the lower energy need of the buildings. The annual saving can increase to 0.61 $/m2 for LPG in the 4th region. The payback period varies between 1.4 years and 9 years, depending on the fuel. Many OECD countries having a high population pay higher prices for electricity and natural gas compared to Turkey. It means that such an energy-efficient material can save more price due to their higher fuel cost.
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Affiliation(s)
- Abid Ustaoglu
- Department of mechanical engineering, Bartin University, Bartin, 74100, Turkey
| | - Kubra Kurtoglu
- Institute of science and technology, Bartin University, Bartin, 74100, Turkey
| | - Osman Gencel
- Department of civil engineering, Bartin University, Bartin, 74100, Turkey.
| | - Fatih Kocyigit
- Department of aviation management, Dicle University, Diyarbakir, Turkey
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Sato M, Inaba S, Noguchi M, Nakagiri A. Vermiculite as a culture substrate greatly improves the viability of frozen cultures of ectomycorrhizal basidiomycetes. Fungal Biol 2020; 124:742-751. [PMID: 32690256 DOI: 10.1016/j.funbio.2020.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
We assessed a new cryopreservation protocol that uses vermiculite as a culture substrate, called the vermiculite protocol (VP), by assessing the viability, recovery time of hyphae after revival, and colony diameter of cryosensitive ectomycorrhizal basidiomycete strains after storage for 2 weeks or 1 year in a vapour-phase liquid nitrogen tank. Twelve difficult-to-preserve strains of nine species (Amanita citrina, A. pantherina, A. rubescens, A. spissa, Kobayasia nipponica, Lactarius akahatsu, L. hatsudake, Sarcodon aspratus, and Tricholoma flavovirens) that did not achieve good revival after cryopreservation with our previous Homolka's perlite protocol and modified perlite protocol (MPP) experiments were used to assess the new methodology. Vermiculite and liquid medium were put into a cryotube and inoculated with an agar plug containing mycelia. The cryotube was cultured for various incubation times. After adequate mycelial growth, a mixture of cryoprotectants (5% dimethyl sulfoxide and 10% trehalose [5D10T] or 5% glycerol and 10% trehalose [5G10T]) was placed into the cryotube. The cryotube was frozen in a freezing container in a -80 °C freezer and then stored in vapour-phase liquid nitrogen. In the recovery test, 10 of 12 strains showed 100% revival after 2 weeks of storage in the 5G10T cryoprotectant, and all 12 strains showed 100% revival after 2 weeks of storage in the 5D10T cryoprotectant. Furthermore, all strains were viable after 1 year of storage in a vapour-phase liquid nitrogen tank. Thus, the VP is applicable to a wide range of ectomycorrhizal basidiomycete cultures, including highly cryosensitive strains.
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Affiliation(s)
- Masanori Sato
- NITE International Patent Organism Depositary (IPOD) 2-5-8, Kazusakamatari, Kisarazu-shi, Chiba, 292-0818, Japan.
| | - Shigeki Inaba
- NITE Biological Resource Center (NBRC) 2-5-8, Kazusakamatari, Kisarazu-shi, Chiba, 292-0818, Japan
| | - Mariko Noguchi
- NITE International Patent Organism Depositary (IPOD) 2-5-8, Kazusakamatari, Kisarazu-shi, Chiba, 292-0818, Japan
| | - Akira Nakagiri
- Fungus/Mushroom Resource and Research Center (FMRC), Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8553, Japan
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Shinzato MC, Wu LF, Mariano TO, Freitas JG, Martins TS. Mineral sorbents for ammonium recycling from industry to agriculture. Environ Sci Pollut Res Int 2020; 27:13599-13616. [PMID: 32030588 DOI: 10.1007/s11356-020-07873-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
In tropical environments, nutrient-poor soils are commonly found, leading to high fertilizers application rates to support agricultural activities. In contrast, anthropogenic activities generate large amounts of effluents containing nitrogen. In this study, two minerals (natural zeolite and vermiculite) were tested to remove NH4+ from an industrial effluent with high pH and contents in Na+ and K+. Afterwards, they were tested as an alternative slow-release fertilizer in the soil. To verify the best conditions to adsorb NH4+, batch tests were conducted using synthetic solutions and an industrial effluent. In general, the efficiency of both minerals in removing NH4+ was high (85% for zeolite and almost 70% for vermiculite) as well as the ability to decrease the industrial effluent pH. In this process, more NH4+ and K+ ions were removed in comparison with Na+, which remained in solution. These minerals were tested as slow-release fertilizers by leaching with distilled water (both minerals releasing 2 mg L-1 NH4+) and with an acid solution (releasing 10 mg L-1 NH4+ from zeolite and 50 mg L-1 NH4+ from vermiculite-corresponding only to 12% of total NH4+ retained by zeolite and 29% by vermiculite). During the test of soil incubation with zeolite-NH4+, the NH4+ ions of the exchangeable sites were retained for a longer period, minimizing their loss by leaching and biological nitrification. Consequently, soil acidification was prevented. Therefore, both minerals showed high efficiency in removing NH4+ from solution which can then be slowly released as a nutrient in the soil.
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Affiliation(s)
- Mirian Chieko Shinzato
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo (UNIFESP - Campus Diadema), Rua São Nicolau, 210, Diadema, SP, CEP: 09913-030, Brazil.
| | - Luis Fernando Wu
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo (UNIFESP - Campus Diadema), Rua São Nicolau, 210, Diadema, SP, CEP: 09913-030, Brazil
| | - Thais Oliveira Mariano
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo (UNIFESP - Campus Diadema), Rua São Nicolau, 210, Diadema, SP, CEP: 09913-030, Brazil
| | - Juliana Gardenalli Freitas
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo (UNIFESP - Campus Diadema), Rua São Nicolau, 210, Diadema, SP, CEP: 09913-030, Brazil
| | - Tereza Silva Martins
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas da Universidade Federal de São Paulo (UNIFESP - Campus Diadema), Rua São Nicolau, 210, Diadema, SP, CEP: 09913-030, Brazil
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Zheng S, Xia S, Han S, Yao F, Zhao H, Huang M. β-Cyclodextrin-loaded minerals as novel sorbents for enhanced adsorption of Cd 2+ and Pb 2+ from aqueous solutions. Sci Total Environ 2019; 693:133676. [PMID: 31634999 DOI: 10.1016/j.scitotenv.2019.133676] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/18/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
The use of minerals to capture heavy metal pollution is limited by their capacity. Here, β-cyclodextrin (β-CD) with a good ability to capture heavy metals is loaded onto the surface of zeolite and vermiculite to adsorb lead and cadmium ions. Using epichlorohydrin (EPI) as a crosslinking agent, β-CD is loaded onto zeolite and vermiculite, as confirmed by a characterization analysis. Isothermal adsorption of Cd2+ and Pb2+ by the loaded minerals is tested at different concentrations, while contact time, pH, and kinetic and thermodynamic characteristics of the adsorption processes are analyzed. The amount of β-CD and crosslinker loaded onto a unit mass of zeolite is higher than that of vermiculite due to the unique porous structure of the zeolite surface. After β-CD loading, the adsorption saturation of zeolite for Cd2+ and Pb2+ are 93.06 and 175.25 mg/g, respectively. The adsorption saturation of Cd2+ and Pd2+ by β-CD-loaded vermiculite is 68.65 and 126.35 mg/g, respectively. The mechanism study revealed that the adsorption process of lead and cadmium ions by β-CD-loaded minerals was combined by diffusional movement with a chemical exchange of ionizable protons or cations, as well as by chemical bonding among heavy metal ions and functional groups (-OH, -COOH and CO).
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Affiliation(s)
- Shengyang Zheng
- College of Environmental Science and Engineering, State Environmental Protection Engineering, Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China; College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Siqi Xia
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Shuwen Han
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Fenxia Yao
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Haitao Zhao
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China.
| | - Manhong Huang
- College of Environmental Science and Engineering, State Environmental Protection Engineering, Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
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Razmjou A, Eshaghi G, Orooji Y, Hosseini E, Korayem AH, Mohagheghian F, Boroumand Y, Noorbakhsh A, Asadnia M, Chen V. Lithium ion-selective membrane with 2D subnanometer channels. Water Res 2019; 159:313-323. [PMID: 31102860 DOI: 10.1016/j.watres.2019.05.018] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/30/2019] [Accepted: 05/05/2019] [Indexed: 06/09/2023]
Abstract
In the last two years, the rapidly rising demand for lithium has exceeded supply, resulting in a sharp increase in the price of the metal. Conventional electric driven membrane processes can separate Li+ from divalent cations, but there is virtually no commercial membrane that can efficiently and selectively extract Li+ from a solution containing chemically similar ions such as Na+ and K+. Here, we show that the different movement behavior of Li+ ion within the sub-nanometre channel leads to Li+ ion-selectivity and high transport rate. Using inexpensive negatively charged 2D subnanometer hydrous phyllosilicate channels with interlayer space of 0.43 nm in a membrane-like morphology, we observed that for an interlayer spacing of below 1 nm, Li+ ions move along the length of the channel by jumping between its two walls. However, for above 1 nm spacing, the ions used only one channel wall to jump and travel. Molecular dynamic (MD) simulation also revealed that ions within the nanochannel exhibit acceleration-deceleration behavior. Experimental results showed that the nanochannels could selectively transport monovalent ions of Li+> Na+> and K+ while excluding other ions such as Cl- and Ca2+, with the selectivity ratios of 1.26, 1.59 and 1.36 for Li+/Na+, Li+/K+, and Na+/K+ respectively, which far exceed the mobility ratios in traditional porous ion exchange membranes. The findings of this work provide researchers with not only a new understanding of ions movement behavior within subnanometer confined areas but also make a platform for the future design of ion-selective membranes.
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Affiliation(s)
- Amir Razmjou
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 73441-81746, Iran; UNESCO Centre for Membrane Science and Technology, School of Chemical Science and Engineering, University of New South Wales, Sydney, 2052, Australia.
| | - Ghazaleh Eshaghi
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 73441-81746, Iran
| | - Yasin Orooji
- College of Materials Science and Engineering, Nanjing Forestry University, No. 158, Longpan Road, Nanjing, 210037, Jiangsu, People's Republic of China
| | - Ehsan Hosseini
- School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
| | | | - Fereshteh Mohagheghian
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 73441-81746, Iran
| | - Yasaman Boroumand
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 73441-81746, Iran
| | - Abdollah Noorbakhsh
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, 73441-81746, Iran
| | - Mohsen Asadnia
- School of Engineering, Macquarie University, Sydney, New South Wales, 2109, Australia
| | - Vicki Chen
- School of Chemical Engineering, University of Queensland, St. Lucia, 4072, Australia; UNESCO Centre for Membrane Science and Technology, School of Chemical Science and Engineering, University of New South Wales, Sydney, 2052, Australia
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Konen T, Johnson JE, Lindgren P, Williams A. Cancer incidence and mortality associated with non-occupational and low dose exposure to Libby vermiculite in Minnesota. Environ Res 2019; 175:449-456. [PMID: 31158563 DOI: 10.1016/j.envres.2019.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/02/2019] [Accepted: 04/05/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND A vermiculite processing plant in a Minneapolis, Minnesota neighborhood utilized asbestos-containing ore from Libby, Montana from the late 1930's until 1989. Multiple pathways of exposure to Libby asbestos were characterized in a cohort of over 6000 plant workers and residents living near the plant. OBJECTIVE We conducted a cohort linkage study to assess the impact of cumulative low dose exposure and the role of occupational history on asbestos-related mortality and cancer morbidity among cohort members residing near a vermiculite plant. METHODS Cohort members alive in 1988 (n = 5848) were linked to the Minnesota Cancer Surveillance System to identify incident cases of mesothelioma, lung cancer, and all-cancer diagnosed from 1988 to 2010. Proportional incidence ratios (PIRs) were calculated for mesothelioma and lung cancer. Vital status and cause of death were ascertained from Minnesota vital records and the National Death Index (1988-2011). Mortality rates of the cohort (2001-2011) for asbestos-related outcomes were compared to the Minnesota population to estimate standardized mortality ratios (SMRs) and stratified by gender, exposure, and occupational history categories. RESULTS We identified seven cases of mesothelioma, with elevated incidence only in females (PIR = 11.76, 95% CI: 3.17, 30.12). Lung cancer was elevated in both genders: PIR = 1.54 (95% CI: 1.19, 2.0) in males and 1.62 (95% CI: 1.21, 2.12) in females. We found elevated mortality from COPD, lung cancer, and mesothelioma among females (SMR for mesothelioma in females = 18.97, CI: 3.91, 55.45), among the 546 deaths identified. All four deaths from mesothelioma occurred in the >75th percentile of exposure (>0.0156 fiber/cc x months). The SMR for lung cancer and all respiratory cancer was elevated even after controlling for occupation. CONCLUSIONS Community exposure to Libby amphibole asbestos from a vermiculite processing plant is associated with increased risk of COPD, lung cancer and mesothelioma incidence and mortality, most notably among females, and is likely to remain a public health issue for years to come.
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Affiliation(s)
- Tess Konen
- Minnesota Department of Health, 85 East 7th Place, PO Box 64882, St. Paul, MN 55164, USA.
| | - Jean E Johnson
- Minnesota Department of Health, 85 East 7th Place, PO Box 64882, St. Paul, MN 55164, USA
| | - Paula Lindgren
- Minnesota Department of Health, 85 East 7th Place, PO Box 64882, St. Paul, MN 55164, USA
| | - Allan Williams
- Minnesota Department of Health, 85 East 7th Place, PO Box 64882, St. Paul, MN 55164, USA
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Wang M, Dong C, Gao W. Evaluation of the growth, photosynthetic characteristics, antioxidant capacity, biomass yield and quality of tomato using aeroponics, hydroponics and porous tube- vermiculite systems in bio-regenerative life support systems. Life Sci Space Res (Amst) 2019; 22:68-75. [PMID: 31421850 DOI: 10.1016/j.lssr.2019.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 05/26/2019] [Accepted: 07/14/2019] [Indexed: 05/22/2023]
Abstract
The nutrient delivery system is one of the most important hardware components in tomato (Lycopersicon esculentum Mill.) production in Bio-regenerative Life Support Systems (BLSS) for future long-term space mission. The objective of this study was to investigate the influences of different nutrient delivery systems (aeroponics, hydroponics and porous tube-vermiculite) on the growth, photosynthetic characteristics, antioxidant capacity, biomass yield and quality of tomato during its life cycle. The results showed that the dry weight of aeroponics and porous tube-vermiculite treatment group was 1.95 and 1.93 g/fruit, but the value of hydroponics treatment group was only 1.56 g/fruit. Both tomato photosynthesis and stomatal conductance maximized at the development stage and then decreased later in senescent leaves. At the initial stage and the development stage, POD activities in the aeroponics treatment were higher than other two treatments, reached 3.6 U/mg prot and 4.6 U/mg prot, respectively. The fresh yield 431.3 g/plant of hydroponics treatment group was lower. At the same time, there were no significant differences among nutrient delivery systems in the per fruit fresh mass, which was 14.2-17.5 g/fruit.
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Affiliation(s)
- Minjuan Wang
- Key Laboratory of Agricultural Informatization Standardization, Ministry of Agriculture, China Agricultural University, Beijing, 100083, China; College of Information and Electrical Engineering, China Agricultural University, 100083, Beijing, China
| | - Chen Dong
- School of Sport Social Science, Shandong Sport University, 250102, Jinan, China; College of Information and Electrical Engineering, China Agricultural University, 100083, Beijing, China.
| | - Wanlin Gao
- Key Laboratory of Agricultural Informatization Standardization, Ministry of Agriculture, China Agricultural University, Beijing, 100083, China; College of Information and Electrical Engineering, China Agricultural University, 100083, Beijing, China.
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Yamaguchi N, Hikono A, Saito T. Effects of zeolite and vermiculite addition on exchangeable radiocaesium in soil with accelerated ageing. J Environ Radioact 2019; 203:18-24. [PMID: 30844680 DOI: 10.1016/j.jenvrad.2019.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 06/09/2023]
Abstract
Soil amendments with zeolite and vermiculite were expected to prevent radiocaesium (137Cs) dissolution and uptake from the soil by plants. In this study, we investigated how zeolite and vermiculite added to soil influence the radiocaesium fixation with ageing. Zeolite and vermiculite were mixed with soil (1 wt%) before or after the addition of carrier-free caesium-137 (137Cs) to soils with different radiocaesium interception potential (RIP), which is related to the capacity of the soil to fix trace radiocaesium. Then, the soils were exposed for repeated wet and dry cycles to accelerate 137Cs immobilization, and its extractability by 1 mol L-1 ammonium acetate was determined before and after 30 dry and wet cycles. Before accelerated ageing (i.e before dry and wet cycles), when 137Cs was adsorbed on the soil before the addition of the amendments, the addition of zeolite and vermiculite caused a decrease in the amount of exchangeable 137Cs in low-RIP soils but an increase in the amount of exchangeable 137Cs in high-RIP soils. The amount of exchangeable 137Cs was significantly decreased after accelerated ageing regardless of the application of amendments. However, radiocaesium fixation with accelerated ageing was partly inhibited by the addition of zeolite, regardless of the RIP values. The 137Cs adsorbed on highly selective sites in zeolite is exchangeable by 1 mol L-1 ammonium acetate. Thus, because a portion of the 137Cs is selectively adsorbed on highly selective sites in zeolite, the redistribution of 137Cs to frayed edge site followed by ageing-induced fixation was likely limited. However, when 137Cs was adsorbed on the soil before the addition of the amendments, the addition of zeolite and vermiculite had little influence on the amount of exchangeable 137Cs. In conclusion, the use of realistic doses of zeolite and vermiculite as agricultural amendments is not effective in enhancing the immobilization of radiocaesium in soil.
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Affiliation(s)
- Noriko Yamaguchi
- Institute for Agro-environmental Science, NARO, 3-1-3, Kannondai, Tsukuba, Ibaraki, 305-8604, Japan.
| | - Atsuko Hikono
- Institute for Agro-environmental Science, NARO, 3-1-3, Kannondai, Tsukuba, Ibaraki, 305-8604, Japan.
| | - Takashi Saito
- Hama Agricultural Regeneration Research Centre, Fukushima Agricultural Technology Centre, 45-169 Sukakeba, Kaibama, Haramachi-ku, Minamisoma, Fukushima, 975-0036, Japan.
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Chen M, Wu P, Li S, Yang S, Lin Z, Dang Z. The effects of interaction between vermiculite and manganese dioxide on the environmental geochemical process of thallium. Sci Total Environ 2019; 669:903-910. [PMID: 30970457 DOI: 10.1016/j.scitotenv.2019.03.079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/06/2019] [Accepted: 03/06/2019] [Indexed: 05/26/2023]
Abstract
The interaction among various soil minerals can significantly impact on the environmental geochemical process of contaminants. Therefore, this study investigated the effects of interaction between vermiculite (VER) and manganese dioxide (MnO2) on the migration and transformation of Tl(I). The VER exhibited typical layered structure and MnO2 possessed a flower-like structure with serious reunion phenomenon, while the production of interaction between vermiculite and manganese dioxide, labeled VER-MnO2, illustrated as fish scales evenly spread over a large sheet, suggesting that MnO2 could triumphantly be anchored on the VER and the aggregation of MnO2 was prevented. Compared with the pure MnO2, VER acted as template substrate contributed the higher specific surface area (298.18 m2·g-1) and the oxidation degree of Mn. VER-MnO2 showed the highest fixation capacity (144.29 mg·g-1) than other two materials in the order VER-MnO2 > MnO2 > VER, and there was no risk derived from Mn dissolution. The influence mechanism of VER-MnO2 on Tl(I) migration and transformation lied in immobilization, ion exchange and oxidization. Fixed-bed column immobilization experiments showed that VER-MnO2 could purify drinking water contaminated by Tl (20 μg·L-1) and the effective breakthrough volumes were 900 bed volumes until reaching the maximum limits allowed in drinking water (0.1 μg·L-1). VER-MnO2 excellently catches Tl to prevent groundwater pollution. This study provides a theoretical guidance for environmental fate and restoration of soil heavy metal pollution.
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Affiliation(s)
- Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, PR China.
| | - Shuaishuai Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Shanshan Yang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, PR China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
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Moraes DS, Rodrigues EMS, Lamarão CN, Marques GT, Rente AFS. New sodium activated vermiculite process. Testing on Cu 2+ removal from tailing dam waters. J Hazard Mater 2019; 366:34-38. [PMID: 30500696 DOI: 10.1016/j.jhazmat.2018.11.086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
New sodium activated vermiculite was used as Cu2+ adsorbent on water simulating the composition of tailing dam of a copper mine in the north region of Brazil. Starting material was vermiculite applied as thermal insulator and adsorbent of Sigma-Aldrich chemical products packs. Characterization was made by X-ray powder diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA) and N2 adsorption-desorption (77 K) to raw vermiculite (VERM) and sodium activated vermiculite (NaVERM) and SEM/EDS and FTIR to by-product metal like-xanthate. Activation process was very successful improving the Cu2+ adsorption in acidic medium by vermiculite from 38 to 79%. A bonus of the activation process was a production of metal like-xanthate (MEX) by hydrometallurgical leaching process.
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Affiliation(s)
- Dorsan S Moraes
- Instituto de Geociências, Universidade Federal do Pará (UFPA), 66075-110, Belém, PA, Brazil.
| | - Elizabeth M S Rodrigues
- Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará (UFPA), 66075-110, Belém, PA, Brazil
| | - Cláudio N Lamarão
- Instituto de Geociências, Universidade Federal do Pará (UFPA), 66075-110, Belém, PA, Brazil
| | - Gisele T Marques
- Instituto de Geociências, Universidade Federal do Pará (UFPA), 66075-110, Belém, PA, Brazil
| | - Augusto F S Rente
- Instituto de Geociências, Universidade Federal do Pará (UFPA), 66075-110, Belém, PA, Brazil
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Yang S, Wu P, Ye Q, Li W, Chen M, Zhu N. Efficient catalytic degradation of bisphenol A by novel Fe 0- vermiculite composite in photo-Fenton system: Mechanism and effect of iron oxide shell. Chemosphere 2018; 208:335-342. [PMID: 29883867 DOI: 10.1016/j.chemosphere.2018.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/24/2018] [Accepted: 06/02/2018] [Indexed: 06/08/2023]
Abstract
Novel Fe0-vermiculite (Fe-Ver-C-H2) composite was synthesized by thermal reduction and acted as catalysts to remove bisphenol A (BPA) in photo-Fenton system. In term of activation ability toward H2O2, separation ability and stability, Fe-Ver-C-H2 presented obvious advantages over other kinds of Fe0-vermiculite composite (Fe-Ver-NaBH4), which obtained by traditional liquid reduction. The reason was that iron oxide shells on the surface of Fe0 were α-Fe2O3 and Fe3O4 for Fe-Ver-NaBH4 and Fe-Ver-C-H2, respectively. And for Fe-Ver-C-H2, the synergistic effect between iron core (Fe0) and iron oxide shell (Fe3O4) is beneficial to catalytic performance. The mechanism and plausible pathway of BPA degradation were also proposed according to the results of radical scavenger studies and gas chromatography-mass spectrometry (GC-MS), respectively. In addition, factorial effects for Fe-Ver-C-H2 in photo-Fenton system were also investigated and optimized as: pH of 5, dosage of 0.2 g L-1 and H2O2 concentration of 20 mM. This study presented a facile method to synthesize novel Fe0-vermiculite composite and provided a new sight to investigate the effect of iron oxide shell on the catalytic performance when Fe0-vermiculite composite acted as catalyst to remove contaminants from the environment in photo-Fenton system.
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Affiliation(s)
- Shanshan Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, China.
| | - Quanyun Ye
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Wen Li
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, Guangdong, 528216, PR China
| | - Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, 510006, PR China
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He Z, Lin H, Hao J, Kong X, Tian K, Bei Z, Tian X. Impact of vermiculite on ammonia emissions and organic matter decomposition of food waste during composting. Bioresour Technol 2018; 263:548-554. [PMID: 29778793 DOI: 10.1016/j.biortech.2018.05.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
This study investigated the effects of adding vermiculite to the food waste composting process. Four treatments with varying vermiculite percent compositions, 0%, 5%, 10% and 15% (w/w, wet weight of food waste basis) mixed with initial food waste were designed and then composted for 42 days. Results show that adding vermiculite prolongs the thermophilic phase, speeds up the organic matter loss, reduces the NH3 emissions and electrical conductivity values. Compared to the control, the amount of nitrogen loss through NH3 emissions in the treatments of 5%, 10% and 15% vermiculite decreased by 9.89%, 26.39% and 18.65%, respectively. Finally this work suggests that vermiculite is a suitable additive for food waste composting, especially when the makeup of the compost is 10% vermiculite.
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Affiliation(s)
- Zaihua He
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Hong Lin
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jiewei Hao
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xiangshi Kong
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Kai Tian
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Zhanlin Bei
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xingjun Tian
- School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu, China.
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Essabti F, Guinault A, Roland S, Régnier G, Ettaqi S, Gervais M. Preparation and characterization of poly(ethylene terephthalate) films coated by chitosan and vermiculite nanoclay. Carbohydr Polym 2018; 201:392-401. [PMID: 30241835 DOI: 10.1016/j.carbpol.2018.08.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/13/2018] [Accepted: 08/19/2018] [Indexed: 11/22/2022]
Abstract
Chitosan (CS) layers are coated on a poly(ethylene terephthalate) (PET) film in order to decrease the oxygen permeability through the polymeric films for food packaging applications. Oxygen transmission rate (OTR) of the 130 μm PET films can be decreased from 11 to only 0.31 cm3/m².day with a coated layer of 2 μm of CS. Additional decrease is obtained with the addition of vermiculite (VMT) to CS matrix in high proportion (40 to 50 w/w%). The OTR of the coated PET films decreased to very low values, below the detection limit of commercial instrumentation (≤0.008 cm3/m2 day). This high-barrier behavior is believed to be due to the brick wall nanostructure, which produces an extremely tortuous path for oxygen molecules.
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Garabrant DH, Pastula ST. A comparison of asbestos fiber potency and elongate mineral particle (EMP) potency for mesothelioma in humans. Toxicol Appl Pharmacol 2018; 361:127-36. [PMID: 30077661 DOI: 10.1016/j.taap.2018.07.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 06/26/2018] [Accepted: 07/04/2018] [Indexed: 11/20/2022]
Abstract
We analyzed the mesothelioma mortality in cohorts of workers exposed to crocidolite, amosite, and chrysotile to estimate asbestos fiber potency for mesothelioma, using the method of Hodgson and Darnton (2000). We relied on the original 17 cohort studies in their analysis, along with 3 updates of those studies and 3 new asbestos cohort studies published since 2000. We extended the analyses to examine the mesothelioma potency of tremolite in vermiculite from Libby, Montana, and for non-asbestiform elongate mineral particles (EMPs) in taconite iron ore, talc, and South Dakota gold mining. Mesothelioma potency (RMeso) was calculated as the percent of all expected deaths that were due to mesothelioma per fiber/cc-year of exposure.The RMeso was 0.0012 for chrysotile, 0.099 for amosite, and 0.451 for crocidolite: thus, the relative potency of chrysotile:amosite:crocidolite was 1:83:376, which was not appreciably different from the estimates by Hodgson and Darnton in 2000. The RMeso for taconite mining fibers was 0.069 which was slightly smaller than that for amosite. The RMeso for Libby fibers was 0.028 which was greater than that for chrysotile and less than that for amosite. Talc and gold mining EMPs were non-potent for mesothelioma. Although there are a number of methods for estimating fiber potency of asbestos and non-asbestiform EMPs, the method of Hodgson and Darnton provides a uniform method by which fiber potency can be compared across many fiber types. Our estimates of RMeso provide a useful addition to our knowledge of mesothelioma potency for different asbestos and non-asbestiform EMP fibers.
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Silva A, Martinho S, Stawiński W, Węgrzyn A, Figueiredo S, Santos LHMLM, Freitas O. Application of vermiculite-derived sustainable adsorbents for removal of venlafaxine. Environ Sci Pollut Res Int 2018; 25:17066-17076. [PMID: 29637454 DOI: 10.1007/s11356-018-1869-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 03/26/2018] [Indexed: 06/08/2023]
Abstract
Removal of emerging pollutants, such as pharmaceuticals, from wastewater is a challenge. Adsorption is a simple and efficient process that can be applied. Clays, which are natural and low-cost materials, have been investigated as adsorbent. In this work, raw vermiculite and its three modified forms (expanded, base, and acid/base treated) were tested for removal of a widely used antidepressant, venlafaxine. Adsorption kinetics followed Elovich's model for raw vermiculite while the pseudo-2nd order model was a better fit in the case of other materials. Equilibrium followed Langmuir's model for the raw and the acid/base-treated vermiculite, while Redlich-Peterson's model fitted better the expanded and the base-treated materials. The adsorption capacity of vermiculite was significantly influenced by the changes in the physical and chemical properties of the materials caused by the treatments. The base-treated, raw, and expanded vermiculites showed lower maximum adsorption capacities (i.e., 6.3 ± 0.5, 5.8 ± 0.7, 3.9 ± 0.2 mg g-1, respectively) than the acid/base-treated material (33 ± 4 mg g-1). The acid/base-treated vermiculite exhibited good properties as a potential adsorbent for tertiary treatment of wastewater in treatment plants, in particular for cationic species as venlafaxine due to facilitation of diffusion of the species to the interlayer gallery upon such treatment. Graphical abstract ᅟ.
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Affiliation(s)
- Andreia Silva
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal
| | - Sílvia Martinho
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal
| | - Wojciech Stawiński
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal
| | - Agnieszka Węgrzyn
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060, Kraków, Poland
| | - Sónia Figueiredo
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal
| | - Lúcia H M L M Santos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal
| | - Olga Freitas
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal.
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Raymond NS, Müller Stöver D, Jensen LS, Håkansson S. Survival and phosphate solubilisation activity of desiccated formulations of Penicillium bilaiae and Aspergillus niger influenced by water activity. J Microbiol Methods 2018; 150:39-46. [PMID: 29778653 DOI: 10.1016/j.mimet.2018.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/16/2018] [Accepted: 05/16/2018] [Indexed: 10/16/2022]
Abstract
The impact of formulation and desiccation on the shelf life of phosphate (P)-solubilising microorganisms is often under-studied, particularly relating to their ability to recover P-solubilisation activity. Here, Penicilllium bilaiae and Aspergillus niger were formulated on vermiculite (V) alone, or with the addition of protectants (skimmed milk (V + SM) and trehalose (V + T)), and on sewage sludge ash with (A + N) and without nutrients (A), and dried in a convective air dryer. After drying, the spore viability of P. bilaiae was greater than that of A. niger. V formulations achieved the highest survival rates without being improved by the addition of protectants. P. bilaiae formulated on V was selected for desiccation in a fluidised bed dryer, in which several temperatures and final water activities (aw) were tested. The highest spore viability was achieved when the formulation was dried at 25 °C to a final aw >0.3. During three months' storage, convective air dried formulations were stable for both strains, except in the presence of skimmed milk for P. bilaiae which saw a decrease in spore viability. In the fluidised bed-dried formulations, when aw >0.3, the loss in viability was higher, especially when stored at 20 °C, than at aw <0.1. P-solubilisation activity performed on ash was preserved in most of the formulations after desiccation and storage. Overall, a low drying temperature and high final aw positively affected P. bilaiae viability, however a trade-off between higher viability after desiccation and shelf life should be considered. Further research is needed to optimise viability over time and on more sustainable carriers.
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Affiliation(s)
- Nelly Sophie Raymond
- Plant and Soil Science Section, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Dorette Müller Stöver
- Plant and Soil Science Section, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark.
| | - Lars Stoumann Jensen
- Plant and Soil Science Section, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Sebastian Håkansson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 750 07 Uppsala, Sweden
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Liu S, Wu P, Chen M, Yu L, Kang C, Zhu N, Dang Z. Amphoteric modified vermiculites as adsorbents for enhancing removal of organic pollutants: Bisphenol A and Tetrabromobisphenol A. Environ Pollut 2017; 228:277-286. [PMID: 28551558 DOI: 10.1016/j.envpol.2017.03.082] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 03/22/2017] [Accepted: 03/26/2017] [Indexed: 06/07/2023]
Abstract
Three novel organic vermiculites (VER) modified by amphoteric surfactants (BS, SB and PBS) with different negatively charged groups (carboxylate, sulfonate and phosphate) were demonstrated and used for removal of bisphenol A (BPA) and tetrabromobisphenol A (TBBPA). The difference in the structure and surface properties of modified vermiculites were investigated using a series of characterization methods. BS and SB surfactant mainly adsorbed on the surface and hard to intercalate into the interlayer of VER, while both adsorption and intercalation occurred in PBS modification. This difference resulted in different packing density of surfactant and hydrophobicity according to the results of contact angle, and affect the adsorption capacities ultimately. The adsorption of two pollutants onto these modified vermiculites were very fast and well fitted with pseudo-second-order kinetic model and Langmuir isotherm. PBS-VER exhibited the highest adsorption capacity (92.67 and 88.87 mg g-1 for BPA and TBBPA, respectively) than other two modified vermiculites in this order PBS-VER > BS-VER > SB-VER. The ionic strength (Na+, Ca2+) and coexisting compounds (Pb2+, humic acid) have different effects on the adsorption. PBS-VER had a good reusability and could remove ionic (methylene blue and orange G) and molecular (BPA) pollutants simultaneously and effectively due to the function of amphoteric hydrophilic groups and alkyl chains. The results might provide novel information for developing low-cost and effective adsorbents for removal of neutral and charged organic pollutants.
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Affiliation(s)
- Shuai Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, PR China.
| | - Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Langfeng Yu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Chunxi Kang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China
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Mazloomi F, Jalali M. Adsorption of ammonium from simulated wastewater by montmorillonite nanoclay and natural vermiculite: experimental study and simulation. Environ Monit Assess 2017; 189:415. [PMID: 28744669 DOI: 10.1007/s10661-017-6080-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 06/20/2017] [Indexed: 05/12/2023]
Abstract
In this research, montmorillonite nanoclay (MNC) and vermiculite were used to adsorb ammonium (NH4+) from simulated wastewater. The effect of organic acids, cations, and anions on adsorption of NH4+ was also studied using batch experiments. The presence of organic acids significantly decreased the NH4+ adsorption using both adsorbents and the reduction followed the order of citric acid > malic acid > oxalic acid. The presence of cations in wastewater could decrease the adsorption of NH4+ and the ion exchange selectivity on the MNC and vermiculite followed the orders Mg > Ca ≥ K > Na and Mg > > Ca > Na > K, respectively. Adsorption of NH4+ by adsorbents in the presence of sulfate (SO4) was higher than those in the presence of phosphate (PO4) and chloride (Cl) anions. Results indicated that MNC and vermiculite had good potential for NH4+ removal depending on adsorbent dosage, pH, contact time, and initial NH4+ concentration. The effect of pH on removal of NH4+ indicated that MNC would be more appropriate as the adsorbent than vermiculite at low pH values. Kinetic analysis demonstrated that the rate-controlling step adsorption for NH4+ by MNC and vermiculite was heterogeneous chemisorption and followed the pseudo-second-order model. The desorption experiments indicated that the adsorption of NH4+ by adsorbents was not fully reversible, and the total recovery of adsorbed NH4+ for MNC and vermiculite varied in the range of 72 to 94.6% and 11.5 to 45.7%, respectively. Cation exchange model (CEM) in PHREEQC program was used to simulate NH4+ adsorption. Agreement between measured and simulated data suggested that CEM was favored in simulating adsorption of NH4+ by clay minerals. The results indicated that MNC and vermiculite have good performance as economic and nature-friendly adsorbents that can ameliorate the water and environment quality.
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Affiliation(s)
- Farhad Mazloomi
- Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran.
| | - Mohsen Jalali
- Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran
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Stawiński W, Węgrzyn A, Dańko T, Freitas O, Figueiredo S, Chmielarz L. Acid-base treated vermiculite as high performance adsorbent: Insights into the mechanism of cationic dyes adsorption, regeneration, recyclability and stability studies. Chemosphere 2017; 173:107-115. [PMID: 28107708 DOI: 10.1016/j.chemosphere.2017.01.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 09/08/2016] [Accepted: 01/05/2017] [Indexed: 06/06/2023]
Abstract
Additional treatment with NaOH of acid activated vermiculite results in even higher increase in the adsorption capacity in comparison to samples modified only in acidic solution (first step of activation) with respect to raw material. Optimization of treatment conditions and adsorption capacity for two cationic dyes (methylene blue (MB) and astrazon red (AR)), also as binary mixture, was evaluated. The capacity, based on column studies, increased from 48 ± 2 to 203 ± 4 mg g-1 in the case of methylene blue and from 51 ± 1 to 127 ± 2 mg g-1 in the case of astrazon red on starting and acid-base treated material, respectively. It was shown that adsorption mechanism changes for both cationic dyes after NaOH treatment and it results in decrease of adsorption rate. In binary mixtures methylene blue is bound stronger by adsorbent and astrazon red may be removed in initial stage of adsorption. Extensive studies on desorption/regeneration process proved high efficiency in recyclable use of all materials. Although cation exchange capacity decreases due to acid treatment, after base treatment exchange properties are used more efficiently. On the other hand, increased specific surface area has less significant contribution into the adsorption potential of studied materials. Obtained adsorbents worked efficiently in 7 adsorption-regeneration cycles and loss of adsorption capacity was observed only in two first cycles.
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Affiliation(s)
- Wojciech Stawiński
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal.
| | - Agnieszka Węgrzyn
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060, Kraków, Poland.
| | - Tomasz Dańko
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060, Kraków, Poland.
| | - Olga Freitas
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal.
| | - Sónia Figueiredo
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072, Porto, Portugal.
| | - Lucjan Chmielarz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060, Kraków, Poland.
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48
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Yin X, Wang X, Wu H, Ohnuki T, Takeshita K. Enhanced desorption of cesium from collapsed interlayer regions in vermiculite by hydrothermal treatment with divalent cations. J Hazard Mater 2017; 326:47-53. [PMID: 27987449 DOI: 10.1016/j.jhazmat.2016.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 05/26/2023]
Abstract
Adsorption of cesium (Cs) on phyllosilicates has been intensively investigated because natural soils have strong ability of immobilizing Cs within clay minerals resulting in difficulty of decontamination. The objectives of present study are to clarify how Cs fixation on vermiculite is influenced by structure change caused by Cs sorption at different loading levels and how Cs desorption is affected by various replacing cations induced at different treating temperature. As a result, more than 80% of Cs was readily desorbed from vermiculite with loading amount of 2% saturated Cs (5.49×10-3mmolg-1) after four cycles of treatment of 0.01M Mg2+/Ca2+ at room temperature, but less than 20% of Cs was desorbed from saturated vermiculite. These distinct desorption patterns were attributed to inhibition of Cs desorption by interlayer collapse of vermiculite, especially at high Cs loadings. In contrast, elevated temperature significantly facilitated divalent cations to efficiently desorb Cs from collapsed regions. After five cycles of treatment at 250°C with 0.01M Mg2+, ∼100% removal of saturated Cs was achieved. X-ray diffraction analysis results suggested that Cs desorption was completed through enhanced diffusion of Mg2+ cations into collapsed interlayer space under hydrothermal condition resulting in subsequent interlayer decollapse and readily release of Cs+.
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Affiliation(s)
- Xiangbiao Yin
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Xinpeng Wang
- College of Resources and Metallurgy, Guangxi University, 100 Daxue East Road, Nanning 530004, PR China
| | - Hao Wu
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshihiko Ohnuki
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kenji Takeshita
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Jolin WC, Kaminski M. Sorbent materials for rapid remediation of wash water during radiological event relief. Chemosphere 2016; 162:165-71. [PMID: 27494317 PMCID: PMC6468322 DOI: 10.1016/j.chemosphere.2016.07.077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/22/2016] [Accepted: 07/24/2016] [Indexed: 05/22/2023]
Abstract
Procedures for removing harmful radiation from interior and exterior surfaces of homes and businesses after a nuclear or radiological disaster may generate large volumes of radiologically contaminated waste water. Rather than releasing this waste water to potentially contaminate surrounding areas, it is preferable to treat it onsite. Retention barrels are a viable option because of their simplicity in preparation and availability of possible sorbent materials. This study investigated the use of aluminosilicate clay minerals as sorbent materials to retain (137)Cs, (85)Sr, and (152)Eu. Vermiculite strongly retained (137)Cs, though other radionuclides displayed diminished affinity for the surface. Montmorillonite exhibited increased affinity to sorb (85)Sr and (152)Eu in the presence of higher concentrations of (137)Cs. To simulate flow within retention barrels, vermiculite was mixed with sand and used in small-scale column experiments. The GoldSim contaminate fate module was used to model breakthrough and assess the feasibility of using clay minerals as sorbent materials in retention barrels. The modeled radionuclide breakthrough profiles suggest that vermiculite-sand and montmorillonite-sand filled barrels could be used for treatment of contaminated water generated from field operations.
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Affiliation(s)
- William C Jolin
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Michael Kaminski
- Nuclear Engineering, Argonne National Laboratory, Lemont, IL 60439, USA.
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Stawiński W, Freitas O, Chmielarz L, Węgrzyn A, Komędera K, Błachowski A, Figueiredo S. The influence of acid treatments over vermiculite based material as adsorbent for cationic textile dyestuffs. Chemosphere 2016; 153:115-129. [PMID: 27015571 DOI: 10.1016/j.chemosphere.2016.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 02/22/2016] [Accepted: 03/03/2016] [Indexed: 06/05/2023]
Abstract
The influence of different acid treatments over vermiculite was evaluated. Equilibrium, kinetic and column studies have been conducted. The results showed that vermiculite first treated with nitric acid and then with citric acid has higher adsorption capacity, presenting maximum adsorption capacities in column experiments: for Astrazon Red (AR), 100.8 ± 0.8 mg g(-1) and 54 ± 1 mg g(-1) for modified and raw material, respectively; for Methylene Blue (MB) 150 ± 4 mg g(-1) and 55 ± 2 mg g(-1) for modified and raw material, respectively. Materials characterization by X-ray diffraction, UV-vis-diffuse reflectance spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, X-ray fluorescence, N2 adsorption and CEC determination, has been performed. The results suggest the existence of exchange of interlayer cations, leaching of metals from vermiculite's sheets and formation of an amorphous phase in the material. Adsorption follows pseudo 2(nd) order model kinetics for both dyestuffs and equilibrium occurs accordingly to Langmuir's model for AR and Freundlich's model for MB. In column systems Yan's model is the best fit. The enhanced properties of acid treated vermiculite offer new perspectives for the use of this adsorbent in wastewater treatment.
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Affiliation(s)
- Wojciech Stawiński
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Olga Freitas
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
| | - Lucjan Chmielarz
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Agnieszka Węgrzyn
- Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland.
| | - Kamila Komędera
- Mössbauer Spectroscopy Laboratory, Pedagogical University, ul. Podchorążych 2, 30-084, Kraków, Poland.
| | - Artur Błachowski
- Mössbauer Spectroscopy Laboratory, Pedagogical University, ul. Podchorążych 2, 30-084, Kraków, Poland.
| | - Sónia Figueiredo
- REQUIMTE, LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
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