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Chaubey A, Pratap T, Preetiva B, Patel M, Singsit JS, Pittman CU, Mohan D. Definitive Review of Nanobiochar. ACS OMEGA 2024; 9:12331-12379. [PMID: 38524436 PMCID: PMC10955718 DOI: 10.1021/acsomega.3c07804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/23/2023] [Accepted: 12/28/2023] [Indexed: 03/26/2024]
Abstract
Nanobiochar is an advanced nanosized biochar with enhanced properties and wide applicability for a variety of modern-day applications. Nanobiochar can be developed easily from bulk biochar through top-down approaches including ball-milling, centrifugation, sonication, and hydrothermal synthesis. Nanobiochar can also be modified or engineered to obtain "engineered nanobiochar" or biochar nanocomposites with enhanced properties and applications. Nanobiochar provides many fold enhancements in surface area (0.4-97-times), pore size (0.1-5.3-times), total pore volume (0.5-48.5-times), and surface functionalities over bulk biochars. These enhancements have given increased contaminant sorption in both aqueous and soil media. Further, nanobiochar has also shown catalytic properties and applications in sensors, additive/fillers, targeted drug delivery, enzyme immobilization, polymer production, etc. The advantages and disadvantages of nanobiochar over bulk biochar are summarized herein, in detail. The processes and mechanisms involved in nanobiochar synthesis and contaminants sorption over nanobiochar are summarized. Finally, future directions and recommendations are suggested.
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Affiliation(s)
| | - Tej Pratap
- School
of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | | | - Manvendra Patel
- School
of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Jonathan S. Singsit
- School
of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Charles U. Pittman
- Department
of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Dinesh Mohan
- School
of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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2
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Zhu X, Chen S, Liu H, Hu X, Wei C, Guo M, Yu Y, Mei C, Chen F, Zheng L, Li W. Study on the removal effect and mechanism of calcined pyrite powder on Cr(VI). INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:448-458. [PMID: 37565667 DOI: 10.1080/15226514.2023.2246591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Pyrite exhibits considerable potential as an adsorbent in wastewater treatment. However, few pyrite adsorbents are directly obtained from natural pyrite, as most are composite materials that require a complex preparation process. To develop a pyrite-based adsorbent with a simple preparation process, pyrite was processed by calcination at 400, 600, and 800 °C for 4 h and ball-milled into a fine powder. The adsorption properties of the pyrite powder were systematically explored. The calcined pyrite powder was characterized by SEM-EDS and XRD. The results revealed that the pyrite calcined at 600 °C exhibited excellent adsorption properties and was primarily composed of Fe7S8. The optimum conditions for Cr(VI) removal were a temperature of 45 °C, an adsorbent dosage of 1 g, an equilibration time of 60 min, and an initial pH of 3. Moreover, the calcined pyrite powder exhibited excellent reusability, and the Cr(VI) removal rate exceeded 65% after three cycles. The Cr(VI) adsorption on pyrite can be well described by the Freundlich model and pseudo-second-order kinetic equation. The calcination temperature is the main factor affecting the adsorption performance of pyrite. Therefore, the calcined pyrite powder is expected to be an excellent adsorbent for Cr(VI) in the wastewater treatment industry.
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Affiliation(s)
- Xingyu Zhu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu College of Nursing, Huai'an, China
| | - Shuli Chen
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Huanjin Liu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaofang Hu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chenxu Wei
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Mengyu Guo
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yinting Yu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chunmei Mei
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Fugui Chen
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Linyu Zheng
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Weidong Li
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
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3
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Li Y, Cheng X, Feng C, Huang X. Interaction of Lead and Cadmium Reduced Cadmium Toxicity in Ficus parvifolia Seedlings. TOXICS 2023; 11:toxics11030271. [PMID: 36977036 PMCID: PMC10054560 DOI: 10.3390/toxics11030271] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/28/2023] [Accepted: 03/14/2023] [Indexed: 05/23/2023]
Abstract
Potentially toxic elements (PTEs) pollution occurs widely in soils due to various anthropogenic activities. Lead (Pb) and cadmium (Cd) coexist in soil frequently, threatening plant growth. To explore the interaction effect between Pb and Cd in Ficus parvifolia and the response of plant physiological characteristics to Pb and Cd stress, we designed a soil culture experiment. The experiment demonstrated that Pb stress improved leaf photosynthesis ability, while Cd stress inhibited it. Furthermore, Pb or Cd stress increased malonaldehyde (MDA) content, but plants were able to reduce it by increasing antioxidant enzyme activities. The presence of Pb could alleviate Cd phytotoxicity in plants by inhibiting Cd uptake and accumulation as well as increasing leaf photosynthesis and antioxidant ability. Pearson correlation analysis illustrated that the variability of Cd uptake and accumulation between Pb and Cd stress was related to plant biomass and antioxidant enzyme activities. This research will offer a new perspective on alleviating Cd phytotoxicity in plants.
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Zhang Q, Zhou J, Zhang L, Zhong S, Ru X, Shu X. Sulfur defect and Fe(III) (hydr)oxides on pyrite surface mediate tylosin adsorption in lake water: effect of solution chemistry and dissolved organic matter. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90248-90258. [PMID: 35869343 DOI: 10.1007/s11356-022-22140-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Pyrite affects the adsorption of tylosin (TYL) due to their coexistence in the lake system. As well as the reactivity groups of S-S-H, S-OH, and Fe-OH, defects also have the possibilities to influence the adsorption of organic contaminants. However, the role of these active sites in antibiotic adsorption on pyrite has not been deeply studied. Besides, pH, N, P, dissolved oxygen, and dissolved organic matter (DOM) fluctuate greatly in lake at different seasons, which may change the surface characteristics of pyrite. Hence, the adsorption of TYL on natural pyrite considered solution chemistry and DOM in lake water was explored in this study. The fitting results of the kinetic and isotherm models showed that the adsorption included physical and chemical interactions. The neutral initial solution pH was conductive to TYL adsorption owing to the combined result of electrostatic and cover of Fe-oxyhydroxide. NO3- and NH4+ had no effect on TYL adsorption, whereas H2PO4- promoted adsorption by forming flocculent Fe(H2PO4)3 precipitates. The dissolved oxygen increased adsorption. This is due to the co-promotion of the pyrite oxidation by oxygen and sulfur defects. The Fe(II)-DOM complex caused by pyrite surface oxidation reduced the concentration of TYL in solution by gathering. Except for the surface charge, reactivity groups on pyrite significantly influenced the adsorption of TYL. The bond fracture of S-S resulted in sulfur defects that contributed to pyrite oxidation. As a result, Fe(III)/Fe(II) on the surface of pyrite or in solution produced a complex Fe(III)/Fe(II) with anions and DOM. In addition, Fe(III)-S on sulfur defects interacted with the O-H of TYL through hydrogen bonding. Furthermore, the Fe-O-C bond is formed by the interaction of C-OH on TYL and Fe(III) (hydr)oxides on the surface of pyrite. The study provides a deep insight into the effect of pyrite surface active sites on amphoteric antibiotic adsorption. It helps to understand antibiotic migration and interactions with widespread pyrite in the real environment.
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Affiliation(s)
- Qian Zhang
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, 541000, Guangxi, China
| | - Jinwen Zhou
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, 541000, Guangxi, China
| | - Lishan Zhang
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, 541000, Guangxi, China
| | - Shan Zhong
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, 541000, Guangxi, China
| | - Xuan Ru
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, 541000, Guangxi, China
| | - Xiaohua Shu
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541000, Guangxi, China.
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Lin Y, Li J, Chen S, Zhou H, Shu Y, Tang L, Qin L, Zhang P, Huang Y. In situ construction of pyrite-marcasite-magnetite composite via FeS2 phase transformation and oxidation for the synergistic degradation of Methyl orange and Cr(VI). Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Zhou P, Qi J, Yang D, Li B, Zhou Y. Purification of Low-Concentration Carbonyl Sulfide by Red Mud-Based Adsorbent. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:194-201. [PMID: 35378594 DOI: 10.1007/s00128-022-03517-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Bauxite residue, also known as red mud (RM), is a kind of industrial solid waste with high alkali content, complex composition and difficult utilization. In this study, a new type of RM-based adsorbent was prepared by using polyethylene glycol modified RM and was used to remove low concentration of COS in flue gas. The optimum preparation conditions of adsorbent and the optimum technological parameters of COS adsorption purification were investigated. Under the optimal conditions, the adsorption efficiency of the new adsorbent exceeds 95%, and the COS adsorption capacity reaches 63.56 mg/m3. The characterization results showed that the main active components of the adsorbent were active alkali, FeOOH and Fe3O4, and the main products were Na2S2O3, Na2SO4, FeS and FeS2.
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Affiliation(s)
- Pengxiang Zhou
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Jiamin Qi
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Di Yang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Bin Li
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
- National and Local Joint Center of Metallurgical and Chemical Waste Gas Resource Recovery, Kunming, 650500, China.
| | - Yue Zhou
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
- National and Local Joint Center of Metallurgical and Chemical Waste Gas Resource Recovery, Kunming, 650500, China.
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Rodríguez DM, Mayordomo N, Schild D, Shams Aldin Azzam S, Brendler V, Müller K, Stumpf T. Reductive immobilization of 99Tc(VII) by FeS 2: The effect of marcasite. CHEMOSPHERE 2021; 281:130904. [PMID: 34289606 DOI: 10.1016/j.chemosphere.2021.130904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/04/2021] [Accepted: 05/13/2021] [Indexed: 06/13/2023]
Abstract
Reductive immobilization of 99Tc by a synthetic FeS2 mixture, i.e. marcasite-pyrite 60:40, was studied by a combined approach of batch experiments and powder X-ray diffraction, X-ray photoelectron spectroscopy as well as Raman microscopy. It was found that the FeS2 mixture removes 100% of Tc from the suspension after 7 days in contact at 6.0 < pH ≤ 9.0. The retention outside that pH range was slower and incomplete. Spectroscopic analysis showed that the redox active species at pH 6.0 is Fe2+ as expected from previous works with pyrite. However, at pH 10.0 the surprising oxidation of S2- to SO42- was found responsible for Tc immobilization. This was explained by the high reactivity of marcasite that is easily oxidized to produce H2SO4. Our work provides new molecular insights into the reductive mobilization of Tc(VII) by oxidative formation of sulfate. The assigned molecular reactions may also be relevant for the assessment of other redox reactive contaminants. Technetium re-oxidation experiments showed that the fast oxidation of marcasite is associated to the reduction of the remaining Tc(VII) in solution, which gives marcasite the potential of Tc natural remediation since it delays the re-oxidation of Tc(IV).
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Affiliation(s)
- Diana M Rodríguez
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Natalia Mayordomo
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Dieter Schild
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Salim Shams Aldin Azzam
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Vinzenz Brendler
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Katharina Müller
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
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8
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Effect of natural pyrite oxidation on the U(VI) adsorption under the acidic and neutral conditions. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07857-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Yi Y, Wang X, Ma J, Ning P. Fe(III) modified Egeria najas driven-biochar for highly improved reduction and adsorption performance of Cr(VI). POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.04.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Yang Z, Zhang X, Jiang Z, Li Q, Huang P, Zheng C, Liao Q, Yang W. Reductive materials for remediation of hexavalent chromium contaminated soil - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145654. [PMID: 33582355 DOI: 10.1016/j.scitotenv.2021.145654] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/18/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Chemical reduction of Cr(VI) to Cr(III) by reductive materials is the most widely used technology for the remediation of Cr(VI)-contaminated soil due to its high efficiency, adaptability and low cost. This paper reviews chromium chemistry and the materials that can effectively reduce Cr(VI) to Cr(III) for the remediation of Cr(VI)-contaminated soil, namely iron-bearing reductants, sulfur-based compounds and organic amendments. Moreover, we discuss the corresponding mechanisms involved in the process of immobilization of Cr(VI) in polluted soil, and emphasize the relationship between the materials remediation performance and soil environmental conditions. Besides, perspectives on the potential future researches of novel materials design and technological development in the remediation of Cr(VI) contaminated soil are also put forward.
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Affiliation(s)
- Zhihui Yang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China
| | - Xiaoming Zhang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Zhi Jiang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Qi Li
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Peicheng Huang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Chujing Zheng
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Qi Liao
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China
| | - Weichun Yang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China.
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Li L, Wu H, Chen J, Xu L, Sheng G, Fang P, Du K, Shen C, Guo X. Anchoring nanoscale iron sulfide onto graphene oxide for the highly efficient immobilization of uranium (VI) from aqueous solutions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115910] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Li W, Yang S, Wang W, Liu Q, He J, Li B, Cai Z, Chen N, Fang H, Sun S. Simultaneous removal of Cr(VI) and acid orange 7 from water in pyrite-persulfate system. ENVIRONMENTAL RESEARCH 2020; 189:109876. [PMID: 32678733 DOI: 10.1016/j.envres.2020.109876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
As the industries advances at a fast pace, efficient and simultaneous removal of both heavy metals and organics from aqueous is essential to protecting public human health and environment. In this work, we used pyrite as reductant and catalyst for simultaneously reducing Cr(VI) and activating persulfate (PS) to degrade acid orange 7 (AO7). The results indicated that the simultaneous removal rate of AO7 and Cr(VI) by pyrite-PS was up to 100% within 60 min under acidic conditions. However, There was a competitive relationship between PS activation and Cr(VI) reduction for robbing Fe2+. At beginning of the reaction, the limited Fe2+ firstly activated persulfate rather than reduce Cr(VI). The effect of dosage of pyrite and PS on Cr(VI) reduction was more significant than that on AO7 degradation. Increased pyrite dosages from 1g·L-1 to 6 g L-1 resulted in enhanced Cr(VI) removal, and excessive PS (more than 0.4 g L-1) was not beneficial to Cr(VI) removal. Electron paramagnetic resonance (EPR) spectroscopy and radical scavenger studies demonstrated that sulfate (SO4-·), singlet oxygen (1O2) and superoxide radical (·O2-) were the crucial reactive oxygen species (ROS) in the pyrite-PS system rather than hydroxyl radical (·OH). This study showed that the pyrite-PS system could simultaneously remove AO7 and Cr(VI), which provided a new idea for the actual wastewater treatment.
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Affiliation(s)
- Wen Li
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China.
| | - Shanshan Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Wenxiang Wang
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China
| | - Qitong Liu
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China
| | - Jiteng He
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China
| | - Baoqing Li
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China; School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Zongping Cai
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China; School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Nanwei Chen
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China; School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Hongsheng Fang
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China
| | - Shuiyu Sun
- Guangdong Polytechnic of Environmental Protection Engineering, Foshan, 528216, Guangdong, People's Republic of China; Guangdong Engineering and Technology Research Center of Solid Waste Resource Recovery and Heavy Metal Pollution Control, Foshan, 528216, PR China; Key Laboratory of Heavy Metals Pollution Prevention and Vocational Education of Guangdong Environmental Protection of Mining and Metallurgy Industry, Foshan, 528216, PR China; Foshan Engineering and Technology Research Center of Heavy Metal Pollution Prevention and Resources Comprehensive Utilization, Foshan, 528216, PR China; School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
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13
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Wang T, Qian T, Zhao D, Liu X, Ding Q. Immobilization of perrhenate using synthetic pyrite particles: Effectiveness and remobilization potential. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 725:138423. [PMID: 32464748 DOI: 10.1016/j.scitotenv.2020.138423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/27/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Radioactive pertechnetate (TcO4-) has been detected in nuclear waste affected soil and groundwater, posing significant effect on human health and the environment. Yet, cost-effective remediation of Tc-contaminated soil and groundwater remains challenging. To address this critical technology need, we prepared a class of pyrite (FeS2) particles for effective immobilization of pertechnetate. Using perrhenate (ReO4-) as a non-radioactive surrogate of TcO4-, we tested the immobilization effectiveness of the material through batch kinetic experiments, and evaluated the remobilization potential of immobilized Re under anoxic (sealed from air) and oxic (exposed to air) conditions and in the presence of humic acid (HA), EDTA, nitrate, and a Chinese loess soil. The results showed that more acidic pH gave faster Re(VII) removal due to more abundant electron sources (Fe2+ and S22-). X-ray diffraction (XRD) and/or X-ray photoelectron spectroscopy (XPS) analyses confirmed formation of ReO2/ReS2 as the major reduction products. The immobilized Re remained highly stable when aged for 360 days under anoxic conditions at different influence factors. Yet, the immobilized Re was vulnerable to oxygen oxidation, and about 78% of Re was remobilized after 40 days of exposure to air regardless of the initial pH (3.5-9.0) due to excessive pyrite oxidation and the associated pH drop (~2). HA at 120 mg/L inhibited Re remobilization under oxic conditions, which lowered the Re remobilization by ~21% after 40 days of oxic aging. The presence of EDTA facilitated dissolution of Fe but inhibited the dissolution of Re under oxic conditions. Nitrate showed negligible effect on Re remobilization. The presence of a Chinese loess soil effectively inhibited Re remobilization under both oxic and anoxic conditions, lowering the leachable Re by ~32% under oxic conditions. The findings may guide engineered application of pyrite particles as a long-lasting reducing material for immobilization pertechnetate or similar redox-active contaminants in soil and water.
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Affiliation(s)
- Ting Wang
- School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China; Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China
| | - Tianwei Qian
- College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong, Shanxi 030600, China.
| | - Dongye Zhao
- Environmental Engineering Program, Department of Civil Engineering, 238 Harbert Engineering Center, Auburn University, Auburn, AL 36849, USA.
| | - Xiaona Liu
- Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China
| | - Qingwei Ding
- Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China
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