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Liu Z, Zhao J, Wang A, Yuan H, Chi Y. Adsorption behavior and mechanism of Cu(II) by sodium alginate/carboxymethylcellulose/magnesium hydroxide (SC-MH) hydrogel. Int J Biol Macromol 2024; 277:134046. [PMID: 39033892 DOI: 10.1016/j.ijbiomac.2024.134046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 07/14/2024] [Accepted: 07/18/2024] [Indexed: 07/23/2024]
Abstract
In the present work, an environmentally-friendly, reusable hydrogel ball characterized by its great adsorption capacity to Cu(II) was synthesized. The preparation of this hydrogel drew on sodium alginate (SA) and carboxymethyl cellulose (CMC) as primary composition elements. The endeavor brought novelty by ingeniously infusing it with slurry magnesium hydroxide (MH). The factors (pH, SC-MH amount, initial concentration, adsorption time) that are critical to adsorption were also investigated. FTIR, SEM-EDS and XPS were used to reveal the adsorption mechanism of Cu on SC-MH. The results show that the surface of SC-MH is rough, and there are a large number of gully-like structures conducive to adsorption, which are rich in hydroxyl and carboxyl groups. Under the optimum conditions, the maximum adsorption capacity reached 215.68 mg/g. Based on its high R2 value (0.999), the Langmuir model is determined to be the most appropriate for describing the adsorption behavior, indicating monolayer homogeneous adsorption. The kinetic data align well with the pseudo-second-order kinetic model. Furthermore, thermodynamic analysis reveals the adsorption process to be spontaneous and endothermic, as demonstrated by a negative ΔG and positive ΔH (38.8859 KJ/mol). The mechanism involves electrostatic attraction, chelation, Mg(OH)2 adsorption and ion exchange.
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Affiliation(s)
- Zhong Liu
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
| | - Jianhai Zhao
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China.
| | - Anni Wang
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
| | - Hongying Yuan
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
| | - Yongzhi Chi
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
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Pan X, Cao F, Guo X, Wang Y, Cui Z, Huang T, Hou Y, Guan X. Development of a Safe and Effective Bacillus thuringiensis-Based Nanobiopesticide for Controlling Tea Pests. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:7807-7817. [PMID: 38514390 DOI: 10.1021/acs.jafc.4c00833] [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: 03/23/2024]
Abstract
Mg(OH)2 was used as the nanocarrier of the Bacillus thuringiensis (Bt) Cry1Ac protein, and the synthesized Cry1Ac-Mg(OH)2 composites were regular and uniform nanosheets. Nano-Mg(OH)2 could effectively improve the insecticidal effect of the Cry1Ac protein toward Ectropis obliqua. It could enhance the damage degree of the Cry1Ac protein to intestinal epithelial cells and microvilli, induce and enrich the production of reactive oxygen species (ROS) in the midgut, and enhance the degradation of the Cry1Ac protein into active fragments. Furthermore, an anti-rinsing assay showed that the Cry1Ac-Mg(OH)2 composites were bound to the notch structure of the tea leaf surface. The retention of the Cry1Ac protein increased by 11.45%, and sprayed nano-Mg(OH)2 was rapidly absorbed by different tissues of tea plants. Moreover, nano-Mg(OH)2 and composites did not significantly affect non-target organisms. These results show that nano-Mg(OH)2 can serve as a safe and effective biopesticide carrier, which provides a new approach for stable and efficient Bt preparation.
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Affiliation(s)
- Xiaohong Pan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Fang Cao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Xueping Guo
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Yilin Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Ziqi Cui
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Tianpei Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Youming Hou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
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Laipan M, Zhang M, Wang Z, Zhu R, Sun L. Highly efficient recovery of Zn 2+/Cu 2+ from water by using hydrotalcite as crystal seeds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169954. [PMID: 38211855 DOI: 10.1016/j.scitotenv.2024.169954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/22/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
The efficient and waste-free recovery of heavy metals is critical for heavy metal wastewater treatment. In this work, we explored how heavy metals can be recovered as valuable chemicals in the presence of crystal seeds. Hydrotalcite (one kind of layered double hydroxides (LDHs)) was used as crystal seeds to recover Zn2+ in the presence of Al3+ from water (i.e., seed-Zn2+-Al3+ system), which was compared with the monometallic heterogeneous system (seed-Zn2+) and direct coprecipitation (Zn2+-Al3+) system. Our results demonstrated that the seed-Zn2+-Al3+ system possessed a recovery rate of 2.6-2.8 times and a recovery kinetic rate of 2.7-5.9 times higher than those of the other two systems. Differing from the latter two systems, hydrotalcite seeds could induce Zn2+ and Al3+ to form ZnAl-LDH in seed-Zn2+-Al3+. Interestingly, the ZnAl-LDH presents a compositional divalent/trivalent cation molar ratio of ca. 3, which is comparable with the value in the hydrotalcite. It was demonstrated that the hydrotalcite seeds could act as a template to significantly induce the formation of ZnAl-LDH complying with the seed's structure and compositional ratio. Similar induction effect of seeds as the Zn2+ system was further verified in Cu2+ systems. This work provides a novel strategy for efficient recovery of heavy metals with product selectivity.
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Affiliation(s)
- Minwang Laipan
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Min Zhang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Ziyu Wang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Runliang Zhu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Luyi Sun
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA; Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA.
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Huang L, Li X, Li Q, Wang Q, Zhao F, Liu W. Ammonia removal and simultaneous immobilization of manganese and magnesium from electrolytic manganese residue by a low-temperature CaO roasting process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11321-11333. [PMID: 38217813 DOI: 10.1007/s11356-024-31895-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
A large amount of open-dumped electrolytic manganese residue (EMR) has posed a severe threat to the ecosystem and public health due to the leaching of ammonia (NH4+) and manganese (Mn). In this study, CaO addition coupled with low-temperature roasting was applied for the treatment of EMR. The effects of roasting temperature, roasting time, CaO-EMR mass ratio and solid-liquid ratio were investigated. The most cost-effective and practically viable condition was explored through response surface methodology. At a CaO: EMR ratio of 1:16.7, after roasting at 187 °C for 60 min, the leaching concentrations of NH4+ and Mn dropped to 10.18 mg/L and 1.05 mg/L, respectively, below their discharge standards. In addition, the magnesium hazard (MH) of EMR, which was often neglected, was studied. After treatment, the MH of the EMR leachate was reduced from 60 to 37. Mechanism analysis reveals that roasting can promote NH4+ to escape as NH3 and convert dihydrate gypsum to hemihydrate gypsum. Mn2+ and Mg2+ were mainly solidified as MnO2 and Mg(OH)2, respectively. This study proposes an efficient and low-cost approach for the treatment of EMR and provides valuable information for its practical application.
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Affiliation(s)
- Lirong Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Xiaoqin Li
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China.
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Qingrui Li
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Qian Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Feiping Zhao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, People's Republic of China
| | - Weizhen Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, People's Republic of China
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Kosmulski M. The pH dependent surface charging and points of zero charge. X. Update. Adv Colloid Interface Sci 2023; 319:102973. [PMID: 37573830 DOI: 10.1016/j.cis.2023.102973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/15/2023]
Abstract
Surfaces are often characterized by their points of zero charge (PZC) and isoelectric points (IEP). Different authors use these terms for different quantities, which may be equal to the actual PZC under certain conditions. Several popular methods lead to results which are inappropriately termed PZC. This present review is limited to zero-points obtained in the presence of inert electrolytes (halides, nitrates, and perchlorates of the 1st group metals). IEP are reported for all kinds of materials. PZC of metal oxides obtained as common intersection points of potentiometric curves for 3 or more ionic strengths (or by means of equivalent methods) are also reported, while the apparent PZC obtained by mass titration, pH-drift method, etc. are deliberately neglected. The results published in the recent publications and older results overlooked in the previous compilations by the same author are reported. The PZC/IEP are accompanied by information on the temperature and on the nature and concentration of supporting electrolyte (if available). The references to previous reviews by the same author allow to compare the newest results with the PZC/IEP of similar materials from the older literature.
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Affiliation(s)
- Marek Kosmulski
- Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
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Wang M, Feng L. A carbon based-screen-printed electrode amplified with two-dimensional reduced graphene/Fe 3O 4 nanocomposite as electroanalytical sensor for monitoring 4-aminophenol in environmental fluids. CHEMOSPHERE 2023; 323:138238. [PMID: 36868416 DOI: 10.1016/j.chemosphere.2023.138238] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The analysis water pollutants are so important strategy for investigation of water quality. On the other hand, 4-aminophenol is known as a hazardous and high-risk compound for humans, and its detection and measurement is very important for investigating the quality of surface and groundwater. In this study, graphene/Fe3O4 nanocomposite was synthesized by a simple chemical method and characterized by EDS and TEM methods and results showed Nano spherical shape of Fe3O4 nanoparticle with diameter about 20 nM decorated at surface of 2D reduce graphene nanosheet (2D-rG-Fe3O4). The 2D-rG-Fe3O4 was used as excellent catalyst at surface of carbon-based screen-printed electrode (CSPE) and used as electroanalytical sensor in monitoring and determination of 4-aminophenol in waste water sample. The results confirmed improving ∼4.0 times in oxidation signal and reducing 120 mV in oxidation potential of 4-aminophenol at surface of 2D-rG-Fe3O4/CSPE compare to CSPE, respectively. The electrochemical investigation showed pH dependence behavior with equal value of electron and proton for -aminophenol at surface of 2D-rG-Fe3O4/CSPE. Using square wave voltammetry method (SWV), the 2D-rG-Fe3O4/CSPE successfully monitored 4-aminophenol in the concentration range 1.0 nM-200 μM. Finally, 2D-rG-Fe3O4/CSPE monitored 4-aminophenol in the different environmental fluids such as urban waste water, industrial waste water and river samples with recovery range 97.2%-104.3% that confirm powerful ability of 2D-rG-Fe3O4/CSPE as analytical tool.
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Affiliation(s)
- Moxi Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Li Feng
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
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Shen Z, Zhang C, Wang T, Xu J. Advances in Functional Hydrogel Wound Dressings: A Review. Polymers (Basel) 2023; 15:polym15092000. [PMID: 37177148 PMCID: PMC10180742 DOI: 10.3390/polym15092000] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023] Open
Abstract
One of the most advanced, promising, and commercially viable research issues in the world of hydrogel dressing is gaining functionality to achieve improved therapeutic impact or even intelligent wound repair. In addition to the merits of ordinary hydrogel dressings, functional hydrogel dressings can adjust their chemical/physical properties to satisfy different wound types, carry out the corresponding reactions to actively create a healing environment conducive to wound repair, and can also control drug release to provide a long-lasting benefit. Although a lot of in-depth research has been conducted over the last few decades, very few studies have been properly summarized. In order to give researchers a basic blueprint for designing functional hydrogel dressings and to motivate them to develop ever-more intelligent wound dressings, we summarized the development of functional hydrogel dressings in recent years, as well as the current situation and future trends, in light of their preparation mechanisms and functional effects.
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Affiliation(s)
- Zihao Shen
- Aulin College, Northeast Forestry University, Harbin 150040, China
| | - Chenrui Zhang
- Aulin College, Northeast Forestry University, Harbin 150040, China
| | - Ting Wang
- Aulin College, Northeast Forestry University, Harbin 150040, China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Juan Xu
- National Research Institute for Family Planning, Haidian District, No. 12, Da Hui Si Road, Beijing 100081, China
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Sun X, Mao M, Zheng Z, Wang J, Wu Z, Li X, Lin Z, Liu W. Solar irradiation accelerates the oxidation of Cr(III) by δ-manganese dioxide. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130150. [PMID: 36257107 DOI: 10.1016/j.jhazmat.2022.130150] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/17/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Cr(VI) has been observed to be released from Cr(III)-bearing natural sources or residues when they are found alongside manganese and manganese oxides. However, relevant mechanism studies normally ignore the effect of simulated solar irradiation on this oxidation reaction. Therefore, we investigated the photochemical reaction between Cr(OH)3 and δ-MnO2, the common species of chromium and manganese oxide found in the environment. At pH 11, the oxidation of Cr(OH)3 by δ-MnO2 was accelerated under simulated solar irradiation, which had an oxidation rate 2.7-fold greater than that in the dark condition. Further investigation revealed that δ-MnO2, an n-type semiconductor with a 2.7 eV band gap, can be excited by light with wavelengths < 459 nm and produce photogenic electrons and holes. These photo-induced carriers reacted with surrounding molecules to form free radicals and participate the redox reactions. Free-radical quenching experiments indicated that hydroxyl radicals (•OH) are the main oxidants of Cr(III) under simulated solar irradiation. This work provides new mechanistic insight into the oxidation of Cr(III) to Cr(VI), which may help clarifying the environmental fate of Cr and the potential solar-triggered release of Cr(VI).
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Affiliation(s)
- Xing Sun
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Minlin Mao
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Zhengqiang Zheng
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China
| | - Jiaxin Wang
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Zhen Wu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Xiaoqin Li
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China.
| | - Zhang Lin
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, PR China
| | - Weizhen Liu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou, Guangdong 510006, PR China.
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Development of nanostructured based ZnO@WO3 photocatalyst and its photocatalytic and electrochemical properties: Degradation of Rhodamine B. INT J ELECTROCHEM SC 2023. [DOI: 10.1016/j.ijoes.2023.100055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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10
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Ranjan Jena S, Mandal T, Choudhury J. Metal-Terpyridine Assembled Functional Materials for Electrochromic, Catalytic and Environmental Applications. CHEM REC 2022; 22:e202200165. [PMID: 36002341 DOI: 10.1002/tcr.202200165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 08/02/2022] [Indexed: 12/14/2022]
Abstract
Molecular assembly induced by metal-terpyridine-based coordinative interactions has become an emergent research topic due to its ease of synthesis and diverse applications. This article highlights recent significant developments in the metal-terpyridine-based supramolecular architectures. At first, the design aspect of the molecular building blocks has been described, followed by elaboration on how the ligand backbone plays an important role for achieving different dimensionalities of the resulting assemblies which exhibit a wide range of potential applications. After that, we discussed different synthetic approaches for constructing these assemblies, and finally, we focused on their significant developments in three specific areas, viz., electrochromic materials, catalysis and a new application in wastewater treatment. In the field of electrochromic materials, these assemblies made important advancements in various aspects like sub-second switching time (<1 s), low switching voltage (<1 V), increased switching stability (>10000 cycles), tuning of multiple colors by using multimetallic systems, fabrication of charge storing electrochromic devices, utilizing and storing solar energy etc. Similarly, the catalysis field witnessed application of the metal-terpyridine assemblies in C-H monohalogenation, heterogeneous Suzuki-Miyaura coupling, photocatalysis, reduction of carbon dioxide, etc. Finally, the environmental application of these coordination assemblies includes capturing Cr(VI) from waste water efficiently with high capture capacity, good recyclability, wide pH independency etc.
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Affiliation(s)
- Satya Ranjan Jena
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, India
| | - Tanmoy Mandal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, India
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Karthigaimuthu D, Ramasundaram S, Nisha P, Arjun Kumar B, Sriram J, Ramalingam G, Vijaibharathy P, Oh TH, Elangovan T. Synthesis of MoS 2/Mg(OH) 2/BiVO 4 hybrid photocatalyst by ultrasonic homogenization assisted hydrothermal methods and its application as sunlight active photocatalyst for water decontamination. CHEMOSPHERE 2022; 308:136406. [PMID: 36115472 DOI: 10.1016/j.chemosphere.2022.136406] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/31/2022] [Accepted: 09/07/2022] [Indexed: 06/15/2023]
Abstract
In this work, MoS2/Mg(OH)2/BiVO4 ternary hybrid photocatalyst was synthesized by sonicated precursor mixture to the hydrothermal procedure to generate a highly efficient solar light-induced and simply recyclable photocatalyst. The obtained hybrid was confirmed by the characteristic peaks of MoS2/Mg(OH)2/BiVO4 observed in X-ray diffraction (14.31°/18.62°/28.18°), infrared spectra (465/445/679 cm-1), ultraviolet-visible spectra (636/683/639 nm) studies, and the band-gap narrowing (2.62/2.44/2.25 eV). The morphological structure of MoS2 (rod), Mg(OH)2 (particles), and BiVO4 (random aggregates) were turned into MoS2/Mg(OH)2/BiVO4 hierarchical nanosheets that coexisted with particles. The photodegradation experiments of the photocatalysts were assessed by using Congo Red (CR), Malachite Green (MG) and Textile Industry Effluent (TIE) as the model pollutant under direct sunlight. The photocatalytic efficiency of the hybrids was noticeably 2.1 to 2.3 times higher than that of the individual components. Photocurrent response test indicate that MoS2/Mg(OH)2/BiVO4 ternary hybrid nanocomposites photocatalysts had a more effective electron/hole pair separation than individual and binary composite photocatalysts. The mechanism of photodegradation of MoS2/Mg(OH)2/BiVO4ternary hybrid photocatalysts was investigated and discussed.
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Affiliation(s)
- D Karthigaimuthu
- Smart Energy Materials Research Laboratory (SEMRL), Department of Energy Science and Technology, Periyar University, Salem, India-636011
| | | | - Parthiban Nisha
- Smart Energy Materials Research Laboratory (SEMRL), Department of Energy Science and Technology, Periyar University, Salem, India-636011
| | - B Arjun Kumar
- Quantum Materials Research Lab (QMRL), Department of Nanoscience and Technology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - J Sriram
- Smart Energy Materials Research Laboratory (SEMRL), Department of Energy Science and Technology, Periyar University, Salem, India-636011
| | - G Ramalingam
- Quantum Materials Research Lab (QMRL), Department of Nanoscience and Technology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - P Vijaibharathy
- Department of Physics, C. B. M. College, (Government Aided), Coimbatore, 641042, India
| | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38436, Republic of Korea
| | - T Elangovan
- Smart Energy Materials Research Laboratory (SEMRL), Department of Energy Science and Technology, Periyar University, Salem, India-636011.
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12
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Yan J, Li G, Qi G, Yao X, Song M. Improved feed forward with bald eagle search for conjunctive water management in deficit region. CHEMOSPHERE 2022; 309:136614. [PMID: 36181848 DOI: 10.1016/j.chemosphere.2022.136614] [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: 06/11/2022] [Revised: 09/13/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
Due to increasing requirements on water resources and a lower recharge rate, the farming seasons are a vital season for the management of groundwater and surface water resource management. This condition necessitates the use of combined water distribution to meet the full water requirements. Analysis of existing surface water resources and related restrictions, this research suggested an algorithm for aquifer stabilization and fulfilling optimum water requirements. To manage the optimum withdrawals and the subsequent drop, this technique first employed the MODFLOW model for simulating the water levels. Next, an improved feed-forward neural network (IFFNN) was combined with an optimization method to create a machine learning (ML) framework. During the last phase, the findings of the optimized connectives approach as well as the relevant fields technologies to determine using improved bald eagle search with least square SVM(IBES-LSSVM) method that predicted the level of water deficit for every period, especially during farming seasons. This approach is based on an improved bald eagle search (IBES) optimization technique for finding the best settings for a least-squares support vector machine (LSSVM). The findings revealed that between 2005 and 2020, the year with the biggest water deficit was 2018 when only roughly 64 percent of water need was satisfied by groundwater (69 percent) and surface water (64 percent) (33 percent). The water depth may have risen by around 0.7 m during the study period if the optimum model had been used. The outcome of this research will help the management forecast future water shortages and make smarter water strategic choices.
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Affiliation(s)
- Jixuan Yan
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, 730070, China; College of Forestry, Gansu Agricultural University, Lanzhou, 730070, China.
| | - Guang Li
- Gansu Agricultural University, Lanzhou, 730070, China
| | - Guangping Qi
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, 730070, China
| | - Xiangdong Yao
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, 730070, China
| | - Miao Song
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, 730070, China
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13
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Zhu J, Jiang Z, Feng L. Improved neural network with least square support vector machine for wastewater treatment process. CHEMOSPHERE 2022; 308:136116. [PMID: 36037940 DOI: 10.1016/j.chemosphere.2022.136116] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/22/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
This research offers a unique interval by using the predicting approach for discharge indicators of water quality data such as biochemical oxygen demand (BOD) and ammonia nitrogen (NH3-N). This is considered one of the significant quality metrics in wastewater treatment plants for water quality management as well as surveillance. To begin, the effluent information for BOD/NH3-N and their supplementary parameters are gathered. Hence BOD and NH3 are considered major feature sources for estimating water pollutants. BOD is high then oxygen level is very low in the water due to pollutants or algae. Ammonia nitrogen is an organic waste component in water from sewage. The significant characteristics with good correlation levels of BOD and NH3-N are examined and identified using a grey correlation analysis method after certain basic data pre-processing procedures. The BOD/NH3-N effluent information of a water treatment plant is predicted using an upgraded feed-forward neural network with the least square support vector machine (FFNN-LSSVM) method. An optimization approach for an enhanced feed-forward neural network (IFFNN) is built by Machine Learning Algorithms. The IFFNN used regular influent water quality, influent rate of flow, and Wastewater performance monitoring and operational conditions as input parameters. For future prediction, input variables were previous different wastewater quality measurements. Lastly, the analysis shows that, when compared to other current algorithms, the proposed methodology can forecast wastewater quality of water with high accuracy in predicting BOD and NH3 levels, limited computation duration, mean error less than 10% and R2 is 90% proves better than existing techniques.
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Affiliation(s)
- Junren Zhu
- Chongqing City Management College, Chongqing, 401331, PR China
| | - Zhenzhen Jiang
- Chongqing Vocational Institute of Engineering, Chongqing, 402260, PR China
| | - Li Feng
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, PR China.
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14
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Deng H, Tu Y, Wang H, Wang Z, Li Y, Chai L, Zhang W, Lin Z. Environmental behavior, human health effect, and pollution control of heavy metal(loid)s toward full life cycle processes. ECO-ENVIRONMENT & HEALTH (ONLINE) 2022; 1:229-243. [PMID: 38077254 PMCID: PMC10702911 DOI: 10.1016/j.eehl.2022.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/04/2022] [Accepted: 11/04/2022] [Indexed: 02/23/2024]
Abstract
Heavy metal(loid)s (HMs) have caused serious environmental pollution and health risks. Although the past few years have witnessed the achievements of studies on environmental behavior of HMs, the related toxicity mechanisms, and pollution control, their relationship remains a mystery. Researchers generally focused on one topic independently without comprehensive considerations due to the knowledge gap between environmental science and human health. Indeed, the full life cycle control of HMs is crucial and should be reconsidered with the combination of the occurrence, transport, and fate of HMs in the environment. Therefore, we started by reviewing the environmental behaviors of HMs which are affected by a variety of natural factors as well as their physicochemical properties. Furthermore, the related toxicity mechanisms were discussed according to exposure route, toxicity mechanism, and adverse consequences. In addition, the current state-of-the-art of available technologies for pollution control of HMs wastewater and solid wastes were summarized. Finally, based on the research trend, we proposed that advanced in-operando characterizations will help us better understand the fundamental reaction mechanisms, and big data analysis approaches will aid in establishing the prediction model for risk management.
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Affiliation(s)
- Haoyu Deng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yuling Tu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Han Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Ziyi Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yanyu Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Wenchao Zhang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Zhang Lin
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangdong 510006, China
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15
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Mousavi Khaneghah A, Mahmudiono T, Javanmardi F, Tajdar-Oranj B, Nematollahi A, Pirhadi M, Fakhri Y. The concentration of potentially toxic elements (PTEs) in the coffee products: a systematic review and meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:78152-78164. [PMID: 36178656 DOI: 10.1007/s11356-022-23110-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Coffee is one of the most consumed products globally, and its contamination with potentially toxic elements (PTEs) occurs throughout the production chain and production. Therefore, the current meta-analysis study aimed to estimate the concentration of essential elements (Cu and Co) and the contamination of PTEs (Ni, Cr, Pb, As, and Cd) in coffee. The recommended databases, including PubMed, Scopus, and ScienceDirect, were investigated to collect data regarding the contamination of PTEs in coffee products from 2010 to 2021. Among 644 retrieved citations in the identification step, 34 articles were included in the meta-analysis. The pooled mean concentration of essential elements in coffee products is much higher than that of toxic elements (Co (447.106 µg/kg, 95% CI: 445.695-448.518 µg/kg) > Ni (324.175 µg/kg, 95% CI: 322.072-326.278 µg/kg) > Cu (136.171 µg/kg, 95% CI: 134.840-137.503 µg/kg) > Cr (106.865 µg/kg, 95% CI: 105.309-108.421 µg/kg) > Pb (21.027 µg/kg, 95% CI: 20.824-21.231 µg/kg) > As (3.158 µg/kg, 95% CI: 3.097-3.219 µg/kg) > Cd (0.308 µg/kg; 95% CI: 0.284-0.332 µg/kg)). Results showed high differences between pooled concentrations of all PTEs in coffee products of different countries.
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Affiliation(s)
- Amin Mousavi Khaneghah
- Department of Fruit and Vegetable Product Technology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Warsaw, Poland.
| | - Trias Mahmudiono
- Department of Nutrition, Faculty of Public Health, Universitas Airlangga, Surabaya, Indonesia
| | - Fardin Javanmardi
- Department of Food Science and Technology, Faculty of Nutrition Science and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behrouz Tajdar-Oranj
- Food and Drug Administration, Iran Ministry of Health and Medical Education, Tehran, Iran
| | - Amene Nematollahi
- Department of Food Safety and Hygiene, School of Health, Fasa University of Medical Sciences, Fasa, Iran
| | - Mohadeseh Pirhadi
- Department of Environmental Health Engineering, Division of Food Safety & Hygiene, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Yadolah Fakhri
- Food Health Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
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16
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Wang Z, Fang Z, Wang B, Zhang Y, Yang M, Li Y. Graphitic carbon nitride facilely modified with pyromellitic diimide with enhanced photocatalytic activity and good selectivity towards the photodegradation of cationic dyes. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Zargazi M, Chahkandi M, Baghayeri M. New highly efficient 2D/1D HAp/g‒C 3N 4 photocatalyst thin film insight into crystal orientation and C‒vacancy effects. CHEMOSPHERE 2022; 303:135079. [PMID: 35623431 DOI: 10.1016/j.chemosphere.2022.135079] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/09/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The novel synthetic Sol‒EPD process of a thin film including of well decorated g‒C3N4 nanotubes on plate‒like hydroxyapatite (HAp) were applied. Using Sol‒EPD designable method anisotropic growth of HAp nanocrystals on the substrate were achieved. It has provided the orientation of the different crystal facets resulted in the photogenerated O‒vacancy from phosphate groups. Based on the studied XRD pattern, EPD deposited film of HAp was oriented along c‒plane that can improve the photocatalytic activity of the designed composited film. Systematic designing was applied for decoration of g‒C3N4 nanotubes on the HAp under thermal condensation of melamine coincide with calcination of HAp. This new designed HAp/g‒C3N4 nanofilm was shown high photocatalytic efficiency and completely degradation of persistent pollutant of 4‒nitrophenol in the aqueous solution. According to the electrochemical impedance spectroscopy and current density studies, the higher charge separation/low charge recombination results were obtained for composited g‒C3N4/HAp nano‒film comparing with the single films of HAp and urchin like g‒C3N4. This high separation of charge pairs should be also assigned to the special designed morphology. In addition, wrapped like structure of g‒C3N4 nanotubes with C‒vacancy around HAp nanoplates play key role in separation of photo‒induced charge pairs, light diffusion, and high light harvesting within hollow nanotube. It can be highlighted that the composite degraded more than 95% of 4‒nitrophenol during 90 min that after 5 runs the photocatalytic activity was not significantly changed.
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Affiliation(s)
- Mahboobeh Zargazi
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran
| | - Mohammad Chahkandi
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran.
| | - Mahdi Baghayeri
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran.
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18
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Bayat R, Bingül Reçber Z, Bekmezci M, Nas MS, Calimli MH, Demirbas O, Akin M, Şen F. Synthesis and application of AuNi@AC nano adsorbents for the removal of Maxilon Blue 5G azo dye from aquatic mediums. Food Chem Toxicol 2022; 167:113303. [PMID: 35850400 DOI: 10.1016/j.fct.2022.113303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/04/2022] [Accepted: 07/12/2022] [Indexed: 10/17/2022]
Abstract
In this research, gold-nicel supported on activated carbon (AC) nanoadsorbent (AuNi@AC) synthesized by following a series of physicochemical procedures was prepared for the removal of Maxilon Blue 5G (MB) which is a cationic textile dye. Experimental studies based on parameters specifically pH, contact time, nano catalytic adsorbent particle, initial MB dye concentration and temperature effect were conducted in aqueous solutions in a batch system. AuNi@AC nanoadsorbents (NAs) reached the equilibrium in 30 min under optimum conditions in adsorption of the dye. The pseudo-first, second-order, and intra-particle diffusion models were tested to evaluate a the experimental results. Adsorption kinetics were found to be represented by the pseudo-second-order model, and the maximum adsorption capacity (qmax.) was calculated to be 542.90 mg/g (or 2.041 mmol/g). The synthesized magnetic AuNi@AC nanoadsorbent showed a high-efficiency reusability effect of about 64% after five reuse runs. Also, thermodynamic function parameters such as activation energy (Ea), Gibbs free energy (ΔG *), and entropy (ΔS *) were investigated in the sorption study. After all evaluation of data, it was concluded that the novel AuNi@AC nanoadsorbent could be considered as an effective support material for the removal of various organic pollutants in aquation solution especially for the removal of MB.
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Affiliation(s)
- Ramazan Bayat
- Faculty of Science, Department of Biochemistry, Dumlupınar University, Kütahya, Turkey; Department of Materials Science & Engineering, Faculty of Engineering, Dumlupinar University, Kutahya, Turkey
| | - Züleyha Bingül Reçber
- Faculty of Engineering, Environmental Engineering Department, Igdir University, Igdir, Turkey
| | - Muhammed Bekmezci
- Faculty of Science, Department of Biochemistry, Dumlupınar University, Kütahya, Turkey; Department of Materials Science & Engineering, Faculty of Engineering, Dumlupinar University, Kutahya, Turkey
| | - Mehmet Salih Nas
- Faculty of Engineering, Environmental Engineering Department, Igdir University, Igdir, Turkey; Research Laboratory and Application Center (ALUM), Igdir University, Igdir, Turkey.
| | - Mehmet Harbi Calimli
- Tuzluca Vocational School, Igdir University, Igdir, Turkey; Research Laboratory and Application Center (ALUM), Igdir University, Igdir, Turkey.
| | - Ozkan Demirbas
- Department of Chemistry, Faculty of Science and Literature, University of Balikesir, Balikesir, Turkey
| | - Merve Akin
- Faculty of Science, Department of Biochemistry, Dumlupınar University, Kütahya, Turkey; Department of Materials Science & Engineering, Faculty of Engineering, Dumlupinar University, Kutahya, Turkey
| | - Fatih Şen
- Faculty of Science, Department of Biochemistry, Dumlupınar University, Kütahya, Turkey.
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19
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Nagarajan L, Saravanan P, Kumaraguru K, Joo SW, Vasseghian Y, Rajeshkannan R, Rajasimman M. Synthesis of magnesium nanocomposites decked with multilayer graphene (MG) and its application for the adsorptive removal of pollutant. CHEMOSPHERE 2022; 298:134121. [PMID: 35271899 DOI: 10.1016/j.chemosphere.2022.134121] [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: 12/31/2021] [Revised: 02/19/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Fossil fuel burning is the exclusive of key causes for greenhouse fume Carbon dioxide (CO2). Magnesium nanocomposites synthesized in combination with graphene were characterized and their performance in adsorbing CO2 is validated. The novelty of this work is the use of magnesium oxide decked MG to capture CO2. The magnesium nanocomposites decked with multilayer graphene (MG) were prepared using a simple combustion process. BET surface area of 1480 m2g-1 makes it desirable for adsorbing CO2 molecules. FTIR analysis after adsorption of CO2 shows peak mid position at 3470.45 cm-1, 1300-1000 cm-1, 1603 cm-1, and 1114.30 cm-1 corresponding to the functional groups R-C-O, R-OH, R-COOH, -alkyne, Si-O-Si, and R-C-O-H shifted, signifying that chemisorption has taken place. The effect of many experimental parameters like adsorbent mass, period, and concentration of CO2 was optimized during the experiments. A maximum of 92.2% of CO2 was adsorbed at a concentration of 5 × 10- 4 M at the optimum contact of 70 min. During the experiment, the saturation point was attained at 70 min. Experiment results were best fitting to Langmuir adsorption isotherm; the maximum monolayer adsorption capacity of MG was 7.067 × 10-3 mol/g/min. The kinetics of CO2 on MG was labeled by Pseudo-second-order and R2 value nearly 0.988.
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Affiliation(s)
- L Nagarajan
- Department of Chemical Engineering, Sri Ram Engineering College, Perumalpattu, India
| | - Panchamoorthy Saravanan
- Department of Petrochemical Technology, University College of Engineering- BIT Campus, Anna University, Tiruchirappalli, India
| | - K Kumaraguru
- Department of Petrochemical Technology, University College of Engineering- BIT Campus, Anna University, Tiruchirappalli, India.
| | - Sang-Woo Joo
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - R Rajeshkannan
- Department of Chemical Engineering, Annamalai University, Chidambaram, Tamil Nadu, India
| | - M Rajasimman
- Department of Chemical Engineering, Annamalai University, Chidambaram, Tamil Nadu, India
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20
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Experimental and modeling analyses of COD removal from industrial wastewater using the TiO 2-chitosan nanocomposites. Sci Rep 2022; 12:11088. [PMID: 35773324 PMCID: PMC9247057 DOI: 10.1038/s41598-022-15387-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 06/23/2022] [Indexed: 11/17/2022] Open
Abstract
In the present study, titanium oxide (TiO2) nanoparticles, chitosan, and several nanocomposites containing different mass dosages of TiO2 and chitosan have been applied as the adsorbent for COD removal from the industrial wastewater (Bouali Sina Petrochemical Company, Iran). The FESEM, XRD, and FTIR tests have been employed to characterize TiO2 nanoparticles, chitosan, and fabricated nanocomposites. Then, the effect of adsorption parameters, including TiO2–chitosan mass ratio (1:1, 1:2, and 2:1), adsorbent content (0.25–2.5 g), temperature (20–50 °C), pH (3–11), solution volume (100–500 mL), and contact time (30–180 min) on the COD reduction has also been monitored both experimentally and numerically. The Box–Behnken design of the experiment approves that TiO2–chitosan (1:1), adsorbent content of 2.5 g, temperature = 20 °C, pH 7.4, solution volume of 100 mL, and contact time = 180 min are the condition that maximizes the COD removal (i.e., 94.5%). Moreover, the Redlich–Peterson and Pseudo-second order models are the best isotherm and kinetic scenarios to describe COD removal’s transient and equilibrium behaviors. The maximum monolayer COD adsorption capacity of the TiO2–chitosan nanocomposite is 89.5 mg g−1. The results revealed that the industrial wastewater COD is better to remove using the TiO2–chitosan (1:1) at temperature = 20 °C.
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21
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Electrochemical monitoring sensors of water pollution systems. Food Chem Toxicol 2022; 166:113196. [PMID: 35691466 DOI: 10.1016/j.fct.2022.113196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/23/2022] [Accepted: 05/28/2022] [Indexed: 11/23/2022]
Abstract
Analytical techniques as strong, precise, and expensive are necessary for monitoring food and water safety for contaminants, microorganisms, and allergies that might be harmful if used. Sudan dyes are commonly utilized as an ingredient in food dye substances and a variety of industrial items. These colors are classified as three carcinogens and are linked to liver and bladder cancers. They are not authorized for human consumption by the International Agency for Research on Cancer (IARC) and are not permitted to be used by the Food Standards Agency or the European Union. This article describes electrochemical dye analysis beside the numerous electrochemical sensors utilized to identify these dyes as a food colorant and water. As a result, the qualities, chemistry, and toxicity of dyes as food colorants and industrial goods in Sudan have been investigated in this study. Sudan dyes have been thoroughly studied, and many electrochemical sensors have been developed to define and monitor these dyes in food colorants. As a result, current electrochemical sensors have been found to be neither mass-production nor cost-effective. Mostly, the synthesis of high-performance materials needs high knowledge, and the production of electrode surfaces is remained difficult due to labor-intensive and time-consuming activities.
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22
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Wan J, Zeng Y, Wang M, Dong B, Xu Z. New mechanism of FA in composted sludge inducing Cu fixation on Albite in open-pit mine soil. J Environ Sci (China) 2022; 116:142-150. [PMID: 35219413 DOI: 10.1016/j.jes.2021.08.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/01/2021] [Accepted: 08/13/2021] [Indexed: 06/14/2023]
Abstract
Fulvic acid (FA), typical organic matter derived from humification process in composted sludge, possesses the potential to remediate mine soils contaminated by heavy metals. To understand the cooper (Cu) immobilizing process in open-pit mine soil induced by FA, changes of Cu speciation in mixture of open-pit mine soil and composted sludge was tracked over 180 days. It was observed that the organic-bound and residual fraction of Cu increased dramatically with the corresponding decrease of Fe/Mn oxide-bound Cu in the first 60 days, then the organic-bound fraction decreased to about its initial proportion during 60-120 days, while residual fraction still increased, and the proportion of residual Cu accounted for over 85% and became stable after 120 days. To reveal the mechanism of FA inducing Cu fixation on Albite which is the main phase of soil primary ore, two groups of Cu adsorption experiments with and without FA were designed. With the addition of FA, the adsorption capacity of Cu by Albite increased by 1.55 times and the content of residual Cu in Albite increased by 7.7 times. It was found that the Cu absorbed in smaller Albite particle induced by FA formed a secondary mineral--Chrysocolla, causing increase of residual fraction of Cu. These results revealed the mechanism: FA was absorbed on the surface of Albite after complexing with Cu ions in the solution, and then it induced Cu into the interlayer and pore channels of Albite. The Cu in the Albite was immobilized by forming Chrysocolla finally.
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Affiliation(s)
- Jiapeng Wan
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yifan Zeng
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Mei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China; Shanghai Investigation Design & Research Institute Co. Ltd, Shanghai 200335, China.
| | - Zuxin Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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23
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Hybrid nanocomposite multinetwork hydrogel containing magnesium hydroxide nanoparticles with enhanced antibacterial activity for wound dressing applications. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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24
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Zhang X, Yang Z, Mei J, Hu Q, Chang S, Hong Q, Yang S. Outstanding performance of sulfurated titanomaghemite (Fe 2TiO 5) for hexavalent chromium removal: Sulfuration promotion mechanism and its application in chromium resource recovery. CHEMOSPHERE 2022; 287:132360. [PMID: 34826960 DOI: 10.1016/j.chemosphere.2021.132360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/11/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
A lot of magnetic sorbents have been developed to meet the current demand for removing Cr (VI) from wastewater. However, the application of magnetic sorbents remains restricted by the unsatisfactory Cr (VI) removal efficiency, sorbent regeneration, and safe disposition of adsorbed Cr species. In this study, magnetic titanomaghemite (Fe2TiO5) was sulfurated with gaseous H2S to improve its Cr (VI) removal efficiency. Sulfuration significantly improved the Cr (VI) removal efficiency of Fe2TiO5 from 3%-14% to 27%-82% at pH 4-10 due to drastically increased the electrostatic adsorption of Cr (VI) and heterogeneous reduction of adsorbed Cr (VI) to Cr (III). Furthermore, the sulfurated Fe2TiO5 recovered using magnetic separation can be regenerated by re-sulfuration without degrading the Cr (VI) removal efficiency, therefore, sulfurated Fe2TiO5 can be recycled for Cr (VI) removal after the regeneration. Moreover, Cr (VI) in aqueous solution can be enriched on sulfurated Fe2TiO5 after multiple adsorptions in the form of Cr2O3 in a content of more than 30% what can be considered as a source of chrome ore. Therefore, sulfurated Fe2TiO5 may be a promising, low-cost, and environment-friendly sorbent for Cr recovery as a co-benefit of Cr (VI) removal from wastewater.
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Affiliation(s)
- Xufan Zhang
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China
| | - Zhenya Yang
- Jiangsu Environmental Engineering Technology Co., Ltd, Nanjing, 210019, PR China
| | - Jian Mei
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China.
| | - Qixing Hu
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China
| | - Shuai Chang
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China
| | - Qianqian Hong
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China
| | - Shijian Yang
- School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China.
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Amrulloh H, Kurniawan YS, Ichsan C, Jelita J, Simanjuntak W, Situmeang RTM, Krisbiantoro PA. Highly efficient removal of Pb(II) and Cd(II) ions using magnesium hydroxide nanostructure prepared from seawater bittern by electrochemical method. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127687] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Aparicio JD, Espíndola D, Montesinos VN, Litter MI, Donati E, Benimeli CS, Polti MA. Evaluation of the sequential coupling of a bacterial treatment with a physicochemical process for the remediation of wastewater containing Cr and organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126307. [PMID: 34130164 DOI: 10.1016/j.jhazmat.2021.126307] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
A restoration strategy was developed for the treatment of two artificial liquid systems (Minimal Medium, MM, and Water Carbon Nitrogen, WCN) contaminated with Cr(VI), lindane (γ-HCH), phenanthrene (Phe), and reactive black 5 (RB5), through the use of an actinobacteria consortium, coupled with a physicochemical treatment using a column filled with nano-scale zero valent iron particles immobilized on dried Macrocystis pyrifera algae biomass. The Sequential Treatment A (STA: physicochemical followed by biological method) removed the three organic compounds with different effectiveness; however, it was very ineffective for Cr(VI) removal. The Sequential Treatment B (STB: biological followed by the physicochemical method) removed the four compounds with variable efficiencies. The removal of γ-HCH, Phe, and RB5 in both effluents did not present significant differences, regardless of the sequential treatment used. The highest removal of Cr(VI) and total Cr was observed in MM and WCN, respectively. Ecotoxicity tests (L. sativa) of the effluents treated with both methodological couplings demonstrated that the toxicity of WCN only decreased at the end of STA, while that of MM decreased at all stages of both sequential treatments. Therefore, MM would be more appropriate to perform both treatments.
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Affiliation(s)
- Juan Daniel Aparicio
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pasaje Caseros, 4000 Tucumán, Argentina; Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 491, 4000 Tucumán, Argentina
| | - Diego Espíndola
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pasaje Caseros, 4000 Tucumán, Argentina; Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 491, 4000 Tucumán, Argentina
| | - Víctor Nahuel Montesinos
- Gerencia Química, Centro Atómico Constituyentes, CNEA, Av. Gral. Paz 1499, 1650 San Martín, Prov. de Buenos Aires, Argentina
| | - Marta Irene Litter
- IIIA (CONICET-UNSAM), Universidad Nacional de General San Martín, Campus Miguelete, Av. 25 de Mayo y Francia, 1650 San Martín, Prov. de Buenos Aires, Argentina
| | - Edgardo Donati
- CINDEFI (CONICET, UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Claudia Susana Benimeli
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pasaje Caseros, 4000 Tucumán, Argentina; Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Catamarca, Av. Belgrano 300, 4700 Catamarca, Argentina.
| | - Marta Alejandra Polti
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pasaje Caseros, 4000 Tucumán, Argentina; Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 205, 4000 Tucumán, Argentina.
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Zhang Y, Huang X, Chen Y, Xie T, Jia L, Tan X, Yu T. Cadmium ions sequestration and transformation on confined magnesium hydroxide gel beads. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Wang XY, Hao Y, Zhao HB, Guo YR, Pan QJ. 2D-layered Mg(OH) 2 material adsorbing cellobiose via interfacial chemical coupling and its applications in handling toxic Cd 2+ and UO 22+ ions. CHEMOSPHERE 2021; 279:130617. [PMID: 34134416 DOI: 10.1016/j.chemosphere.2021.130617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/08/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
The interfacial chemistry of nanocomposite materials is of overarching importance in the separation and purification science; moreover, its understanding helps to guide synthesis, clarify structure-property relationship and unearth novel applications. However, the composites feature rather complicated local structures and hydrogen bonds are often involved in the interface and the vicinity of active sites. In this regard, density functional theory first-principle calculations associated with experimental study have synergistically examined two-dimensional (2D) magnesium hydroxide material with different layers and their adsorption toward cellobiose. Hydrogen bonds are found responsible for the interfacial coupling, which make it vital to cover the dispersion correction in the calculation. The average adsorption energy ranges from -0.29 to -0.35 eV, falling well within the range of reported hydrogen-bonding strength. On the basis of calculated structural/interfacial properties and experimental findings, the 2D Mg(OH)2 in terms of three-layer model was unraveled to substitute toxic Cd2+ ion and sorb radioactive UO22+ that is coordinated by water and hydroxyl groups. These reactions are thermodynamically feasible. The ion-exchanging mechanism was proposed for cadmium removal and the outer-sphere adsorption one for uranium extraction.
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Affiliation(s)
- Xin-Yu Wang
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China
| | - Yang Hao
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China
| | - Hong-Bo Zhao
- Department of Food and Pharmaceutical Engineering, Suihua University, Suihua, 152061, China
| | - Yuan-Ru Guo
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin, 150040, China.
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China.
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Zhu Y, Tang Y, Ruan Z, Dai Y, Li Z, Lin Z, Zhao S, Cheng L, Sun B, Zeng M, Zhu J, Zhao R, Lu B, Long H. Mg(OH) 2 nanoparticles enhance the antibacterial activities of macrophages by activating the reactive oxygen species. J Biomed Mater Res A 2021; 109:2369-2380. [PMID: 34110087 DOI: 10.1002/jbm.a.37219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 05/04/2021] [Accepted: 05/04/2021] [Indexed: 11/09/2022]
Abstract
Infection often causes disastrous consequences in all fields of clinical medicine, especially orthopedics. Hence, critical efforts are being made to engineer novel nanomaterials for the treatment of orthopedic infections due to the high biocompatibility and antibacterial properties they possess. The purpose of this study was to investigate the antibacterial effects of magnesium hydroxide (Mg(OH)2 ) nanoparticles (NPs) in vitro and determine their possible mechanisms of action. In this study, Escherichia coli was selected as the pathogenic bacteria and it was found that Mg(OH)2 NPs significantly inhibited the growth of E. coli by promoting nucleic acid leakage, inhibiting protein synthesis, and suppressing the metabolic activity. The minimum inhibitory concentration for these bacteria was determined to be 4.4 μg/ml. In vitro flow cytometry and immunofluorescence tests indicated that Mg(OH)2 NPs induced the macrophages to generate reactive oxygen species to kill the bacteria. To understand the mechanisms involved in this process, western blotting was performed and it was found that Mg(OH)2 NPs activated the phosphatidylinositol-3-kinase/serine-threonine kinase (PI3K/Akt) signaling pathway of macrophages to enhance their phagocytosis with no obvious cytotoxicity. Thus, Mg(OH)2 NPs are a suitable choice to develop promising agents or coating materials for the treatment of clinically widespread infections in view of their safety, biocompatibility, and powerful antibacterial properties.
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Affiliation(s)
- Yong Zhu
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Yifu Tang
- Department of Orthopaedics, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhe Ruan
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Yilong Dai
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, China
| | - Zhaohui Li
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Zhangyuan Lin
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Shushan Zhao
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Liang Cheng
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Buhua Sun
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Ming Zeng
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Jianxi Zhu
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Ruibo Zhao
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Bangbao Lu
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Haitao Long
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
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Zhang K, Min X, Zhang T, Si M, Jiang J, Chai L, Shi Y. Biodeposited Nano-CdS Drives the In Situ Growth of Highly Dispersed Sulfide Nanoparticles during Pyrolysis for Enhanced Oxygen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2020; 12:54553-54562. [PMID: 33231421 DOI: 10.1021/acsami.0c14388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A novel, efficient, and stable graphene-based composite oxygen evolution reaction (OER) catalyst, BG@Ni/Ni3S2, was designed via high-specificity, low-cost biosynthesis and efficient electrostatic self-assembly. In the synthetic process, bacterial cells containing biodeposited CdS nanocrystals, graphene oxide (GO), and Ni2+ ions are assembled into a sandwich-type hybrid precursor. The nanosized sulfur source drives in situ sulfidation during pyrolysis, which induces the uniform formation and growth of Ni/Ni3S2 composite nanoparticles (NPs) on the graphene substrate. Benefiting from the high specific surface area and uniform distribution of NPs, the catalyst has a large number of exposed active sites and exhibits rapid mass transfer. In addition, the skeleton composed of a conductive carbon matrix and metallic Ni-Ni network ensures the excellent electron transfer during the OER, and the synergistic effect of Ni0 and Ni3S2 further optimizes the electronic structure and accelerates the OER kinetics. The dominant catalytic sites at the nanointerface between Ni0 and Ni3S2 provide favorable thermodynamic conditions for the adsorption of OER intermediates. As a result, BG@Ni/Ni3S2 exhibits efficient catalytic performance for the OER: the overpotential and Tafel slope are only 320 mV at 100 mA cm-2 and 41 mV dec-1, respectively. This work provides a novel understanding of the intrinsic activity of transition metal sulfide composites and a biological-based design for OER catalysts.
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Affiliation(s)
- Kejing Zhang
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
| | - Xiaoye Min
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
| | - Tingzheng Zhang
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
| | - Mengying Si
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
| | - Jun Jiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha 410083, P.R. China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha 410083, P.R. China
| | - Yan Shi
- School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha 410083, P.R. China
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31
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Bae S, Yoon S, Kaplan U, Kim H, Han S, Lee W. Effect of groundwater ions (Ca 2+, Na +, and HCO 3-) on removal of hexavalent chromium by Fe(II)-phosphate mineral. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122948. [PMID: 32497861 DOI: 10.1016/j.jhazmat.2020.122948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/08/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
A systematic study was conducted to investigate the effect of major groundwater ions (i.e., Ca2+, Na+, and HCO3-) on removal of hexavalent chromium (Cr(VI)) by an Fe(II)-phosphate mineral (i.e., vivianite). The batch experiments revealed that the second-order rate constant for Cr(VI) removal by vivianite with Ca2+ + CO32- (0.076-1.90 mM) and Na+ + HCO3- (0.26-6.50 mM) was 1.5-5.2 times lower than that without these ions. The removal kinetics of Cr(VI) by vivianite was abruptly slowed down with the increased ion concentration, which showed their inhibitory effect on the reaction. The results of the geochemical modeling and density functional theory calculations showed that the presence of Ca2+ + HCO3- and Na+ + HCO3- can form less favorable Cr(VI) species (i.e., CaCrO4(aq) and NaCrO4-) on the Fe-B site of vivianite surface, leading to the inhibitory effect observed in this study. Finally, the X-ray absorption spectroscopy results showed that reductive immobilization of Cr(VI) to Cr(III) occurred by structural Fe(II) oxidation of vivianite to amorphous mixed-valence Fe-phosphate via an inner-sphere complexation. The results suggest that the presence of Ca2+, Na+, and HCO3- in phosphorous-enriched iron-reducing environments may lower the remedial efficiency of Cr(VI) removal.
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Affiliation(s)
- Sungjun Bae
- Department of Civil and Environmental Engineering, Konkuk University, Seoul 05029, South Korea
| | - Sunho Yoon
- Department of Civil and Environmental Engineering, Konkuk University, Seoul 05029, South Korea
| | - Ugras Kaplan
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Seunghee Han
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, South Korea
| | - Woojin Lee
- Department of Civil and Environmental Engineering, Green Environment and Energy Lab., National Laboratory Astana, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.
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32
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A novel nitrogen-containing covalent organic framework adsorbent for the efficient removal of bisphenol A from aqueous solution. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.08.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Sun Q, Liu F, Yuan Y, Liu W, Zhang W, Zhang J, Lin Z. Cellulose Mediated Reduction and Immobilization of Cr(VI) in Chromite Ore Processing Residue. JOURNAL OF HAZARDOUS MATERIALS 2020; 394:122538. [PMID: 32203717 DOI: 10.1016/j.jhazmat.2020.122538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/06/2020] [Accepted: 03/12/2020] [Indexed: 05/07/2023]
Abstract
It is a great challenge to find an effective method for the treatment of chromite ore processing residue (COPR), due to the highly toxic and mobile characteristic of Cr(VI) in the sludge. This work reported a facile strategy to thoroughly reduce and immobilize Cr(VI) that was encapsulated in COPR by biomass-assistant hydrothermal treatment. After hydrothermal treatment at 160 °C for 180 min, the leaching of Cr(VI) in COPR decreased from 138.6 mg/L to 2.31 mg/L, well below the disposal standard limit (5 mg/L). It was found that in-situ produced volatile synthesis gas (H2, CO and CH4) by cellulose under hydrothermal condition, was responsible for Cr(VI) reduction. The reduction kinetics were temperature-dependent and the rate constants increased from 7.8 × 10-3 min-1 at 120 °C to 77.9 × 10-3 min-1 at 180 °C. Further simulation experiments revealed that (i) Fe-hydrotalcite in COPR acted as the catalyst for the decomposition of cellulose, and (ii) cellulose can hydrothermally produce reductive gas with a high efficiency, where 0.1 g of cellulose can realize the reduction and immobilization of Cr(VI) equivalent to 14 g of COPR by 14 cycles of treatment. This study provided a promising strategy for one-step remediation of COPR by the coupled reduction-stabilization process.
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Affiliation(s)
- Qianzhe Sun
- Key Laboratory of Environmental Nano-technology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Feng Liu
- Key Laboratory of Environmental Nano-technology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Yanjie Yuan
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Weizhen Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P.R. China
| | - Weifang Zhang
- Key Laboratory of Environmental Nano-technology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China; National Engineering Laboratory for VOCs Pollution Control Materials & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Jing Zhang
- Key Laboratory of Environmental Nano-technology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China; National Engineering Laboratory for VOCs Pollution Control Materials & Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China.
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P.R. China
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Ge Q, Feng X, Wang R, Zheng R, Luo S, Duan L, Ji Y, Lin J, Chen H. Mixed Redox-Couple-Involved Chalcopyrite Phase CuFeS 2 Quantum Dots for Highly Efficient Cr(VI) Removal. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8022-8031. [PMID: 32412745 DOI: 10.1021/acs.est.0c01018] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Iron-based nanosized ecomaterials for efficient Cr(VI) removal are of great interest to environmental chemists. Herein, inspired by the "mixed redox-couple" cations involved in the crystal structure and the quantum confinement effects resulting from the particle size, a novel type of iron-based ecomaterial, semiconducting chalcopyrite quantum dots (QDs), was developed and used for Cr(VI) removal. A high removal capacity up to 720 mg/g was achieved under optimal pH conditions, which is superior to those of the state-of-the-art nanomaterials for Cr(VI) removal. The mechanism of Cr(VI) removal was elucidated down to an atomic scale by combining comprehensive characterization techniques with adsorption kinetic experiments and DFT calculations. The experimental results revealed that the material was a good electron donor semiconductor attributed to the existence of "mixed redox couple of Cu(I)-S-Fe(III)" in the crystal structure. With the size-dependent quantum confinement effect and the high surface area, the semiconducting chalcopyrite QDs could effectively remove Cr(VI) from aqueous solution through a syngenetic photocatalytic reduction and adsorption mechanism. This study not only reports the design histogram of the iron-based CuFeS2 QD ecomaterial for efficient Cr(VI) removal but also paves the way for understanding the atomic-scale mechanism behind the syngenetic effects of using the QD semiconducting material for Cr(VI) removal.
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Affiliation(s)
- Qiuyue Ge
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Physics, Shanghai University of Electric Power, Shanghai 200090, China
| | - Xuezhen Feng
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ranhao Wang
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Renji Zheng
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Siyuan Luo
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lele Duan
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yongfei Ji
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Jia Lin
- Department of Physics, Shanghai University of Electric Power, Shanghai 200090, China
| | - Hong Chen
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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Xu S, Zhong Z, Liu W, Deng H, Lin Z. Removal of Sb(III) from wastewater by magnesium oxide and the related mechanisms. ENVIRONMENTAL RESEARCH 2020; 186:109489. [PMID: 32311525 DOI: 10.1016/j.envres.2020.109489] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/29/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
Pollution and remediation of antimony in aquatic ecosystems have been paid increasing attention. In the present work, environmentally friendly nano-MgO was used for the first time to remove Sb(III) from the water system. The batch experiments indicated that the nano-MgO calcined at 400 °C (named 400-MgO) exhibited superior adsorption capacity for Sb(III). The adsorption isotherm was fitted well with the Freundlich model, and especially when the initial concentration is 15 mg‧L-1, the adsorption capacity is as high as 140.1 mg‧g-1. Researches through X-ray diffraction (XRD), Transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) showed that the main removal mechanisms lie in the generation of Mg active sites, which is capable of coordinating Sb(III), during the hydration process of MgO, providing a nucleation center for the progressive production of MgSb2O4. As a whole, precipitation is the predominant mechanism for MgO to remove Sb(III). Over time, a part of MgO is hydrated to Mg(OH)2, and consequent chemisorption also helps to remove Sb(III). Our work has demonstrated that nano-MgO is a promising adsorbent for Sb(III) removal from contaminated water and provided new insights into the interaction mechanism between MgO and Sb(III).
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Affiliation(s)
- Si Xu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling, South China University of Technology, Guangzhou, 510006, China
| | - Zuqi Zhong
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling, South China University of Technology, Guangzhou, 510006, China
| | - Weizhen Liu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling, South China University of Technology, Guangzhou, 510006, China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, South China University of Technology, Guangzhou, 510006, China
| | - Hong Deng
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling, South China University of Technology, Guangzhou, 510006, China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, South China University of Technology, Guangzhou, 510006, China.
| | - Zhang Lin
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling, South China University of Technology, Guangzhou, 510006, China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, South China University of Technology, Guangzhou, 510006, China
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36
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Zheng J, Li J, Ling L, Liu X, Kong S, Liao H, Liu W, Ning P, Lin Z. Crystal regulation of gypsum via hydrothermal treatment with hydrogen ion for Cr(VI) extraction. JOURNAL OF HAZARDOUS MATERIALS 2020; 390:120614. [PMID: 31378419 DOI: 10.1016/j.jhazmat.2019.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 05/02/2019] [Accepted: 05/04/2019] [Indexed: 06/10/2023]
Abstract
Heavy metal-containing gypsum is a widespread hazardous waste. In this work, H+ was found to be the most essential factor of the mineralizers in hydrothermal treatment to completely (≥99.8%) extract Cr(VI) from gypsum waste to the supernatant, where the significant growth (from several μm to several hundreds of μm) and perfection of the gypsum crystals were observed. Moreover, with increasing concentration of H+, the crystal growth (undergoing Ostwald ripening process) was accelerated and the phase transformation temperature of gypsum was decreased from 110℃ (at 0.2 mol/L of HCl) to 100℃ (at 0.3 mol/L of HCl), which are favorable to enhance Cr(VI) extraction efficiency. Pilot experiments further certified this method to be practicable even in ton-scale. This work proposes a practicable and universal method to completely extract Cr(VI) from gypsum waste, and would also inspire the recycle of gypsum waste containing other heavy metals, such as As, Pb, Cd, and Hg.
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Affiliation(s)
- Jiayi Zheng
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China
| | - Jing Li
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China
| | - Lan Ling
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China
| | - Xueming Liu
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China
| | - Silan Kong
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China
| | - Huizhong Liao
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China
| | - Weizhen Liu
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China.
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China
| | - Zhang Lin
- School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China
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Li B, Pu S, Mandal S, Li M. Viscosity modification enhanced the migration and distribution of colloidal Mg(OH) 2 in aquifers contaminated by heavy metals. ENVIRONMENT INTERNATIONAL 2020; 138:105658. [PMID: 32203808 DOI: 10.1016/j.envint.2020.105658] [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: 07/21/2019] [Revised: 01/02/2020] [Accepted: 03/10/2020] [Indexed: 06/10/2023]
Abstract
Mg(OH)2 is extensively considered as an potential material for groundwater remediation because its injection could provide a long-term pH buffering system. In this study, colloidal Mg(OH)2 was regarded as an alternative reagent for the in-situ remediation of heavy metal polluted groundwater. However, experiments demonstrated that the transport performance of colloidal Mg(OH)2 in groundwater was depressed by the contamination of heavy metals and its stabilization performance for heavy metals was deteriorated. To solve these difficulties, the transport properties of colloidal Mg(OH)2 was enhanced by viscosity modification by adding xanthan gum (XG). Column tests were conducted to investigate the transport performance of colloidal Mg(OH)2 with and without viscosity modification, and to evaluate its stabilization effect for Pb and Cd polluted aquifer. Experimental results indicate that although the injection pressure increased during the migration of colloidal Mg(OH)2, the increased viscosity effectively could decrease the intensity of Brownian motion of Mg(OH)2 particles and reduce the collision efficiency between colloidal particles and aquifer media. Thus, deposition of Mg(OH)2 particles on aquifer media significantly reduced after viscosity modification, and its migration performance in groundwater was effectively enhanced. In contrast, the distribution of colloidal Mg(OH)2 was more uniform after viscosity modification, and immobilization of heavy metals in contaminated aquifer was noticeably improved, furthermore the exchangeable fraction of Pb and Cd is significantly reduced.
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Affiliation(s)
- Bowen Li
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, PR China
| | - Shengyan Pu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China.
| | - Sandip Mandal
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Miao Li
- School of Environment, Tsinghua University, Beijing 100084, PR China
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Yang Z, Cai W, Zhou J, Xia Q, Wang T. Fast, Large-Scale, and Stable Preparation of η-Al2O3 Microspheres by Fully Utilizing N,N-Dimethylformamide at Room Temperature. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05407] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhichao Yang
- School of Chemistry & Chemical Engineering, Guangzhou University, 230 Guangzhou University City Outer Ring Road, Guangzhou 510006, P. R. China
- School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Weiquan Cai
- School of Chemistry & Chemical Engineering, Guangzhou University, 230 Guangzhou University City Outer Ring Road, Guangzhou 510006, P. R. China
- School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Jinpeng Zhou
- School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Qing Xia
- School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Tielin Wang
- School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, 206, Guanggu 1st Road, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
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Wang H, Hou L, Shen Y, Huang L, He Y, Yang W, Yuan T, Jin L, Tang CJ, Zhang L. Synthesis of core-shell UiO-66-poly(m-phenylenediamine) composites for removal of hexavalent chromium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:4115-4126. [PMID: 31828712 DOI: 10.1007/s11356-019-07070-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The present research developed a direct in situ heterogeneous method to synthesize UiO-66-poly(m-phenylenediamine) core-shell nanostructures by inducing assembly of m-phenylenediamine radical on UiO-66 surfaces. The strong interaction between negative charged UiO-66 and positive radical from the oxidation of monomer is the major driving force. The produced UiO-66-poly(m-phenylenediamine) composites exhibited a distinct core-shell morphology with controllable surface features. The UiO-661-PmPD0.5 showed a uniform PmPD shell with a thickness of 40-60 nm and the nanocomposite exhibited a high specific surface area of 319.77 m2 g-1. Moreover, the Cr(VI) adsorption amount of the polymeric shell in the nanocomposites can reach as high as 745 mg g-1, far beyond the performance of the original PmPD. The adsorption tends to be equilibrium within 300 min. This research opens a hopeful window for facile and large-scale fabrication of core-shell nanostructures with controllable core-shell configuration, exhibiting high prospect in heavy metal removal from water.
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Affiliation(s)
- Haiying Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China
| | - Lanjing Hou
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Yujun Shen
- Department of Electronic Technology and Engineering, Shanghai Technical Institute of Electronics & Information, Shanghai, 200000, People's Republic of China
| | - Lei Huang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Yingjie He
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Weichun Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China
| | - Tao Yuan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Linfeng Jin
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Chong-Jian Tang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, 410083, China.
| | - Liyuan Zhang
- Department of Civil Engineering, Environmental Engineering Research Centre, The University of Hong Kong, Pokfulam, China.
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40
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Tang Y, Li Z, Xu Z, Zhang J, Qu C, Zhang Z. Synthesis of hierarchical MgO based on a cotton template and its adsorption properties for efficient treatment of oilfield wastewater. RSC Adv 2020; 10:28695-28704. [PMID: 35520079 PMCID: PMC9055877 DOI: 10.1039/d0ra04181e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 07/10/2020] [Indexed: 11/21/2022] Open
Abstract
A biomorphic MgO nanomaterial was fabricated via a facile and low-cost immersion method using cotton as the template.
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Affiliation(s)
- Ying Tang
- College of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an
- China
| | - Zhaoyi Li
- College of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an
- China
| | - Zhongying Xu
- College of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an
- China
| | - Jie Zhang
- State Key Laboratory of Petroleum Pollution Control
- CNPC Research Institute of Safety and Environmental Technology
- Beijing
- China
| | - Chengtun Qu
- State Key Laboratory of Petroleum Pollution Control
- CNPC Research Institute of Safety and Environmental Technology
- Beijing
- China
| | - Zhifang Zhang
- School of Chemistry and Chemical Engineering
- Yulin University
- Yulin
- China
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Wang Y, Lin J, Wang Y, Liu Z, Lian J, Liu M. Highly efficient and selective removal of low-concentration antibiotics from aqueous solution by regenerable Mg(OH) 2. J Environ Sci (China) 2020; 87:228-237. [PMID: 31791495 DOI: 10.1016/j.jes.2019.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 06/10/2023]
Abstract
The prevalent presence of fluoroquinolone antibiotics in aquatic environments has attracted considerable attention because of their harmful effects on humans and the ecological environment. Magnesium hydroxide nanocrystals were found to act as a simple and effective adsorbent to remove low-concentration ciprofloxacin (CIP) in aqueous solution. The as-prepared Mg(OH)2 nanocrystals exhibited excellent CIP adsorption performance and high selectivity toward CIP molecules compared with other antibiotics or aromatics, e.g., norfloxacin (NOR) and eosin B (EB). The adsorbent showed pH-dependent adsorption, indicating that the adsorption process is probably dominated by an electrostatic interaction mechanism. In addition, structural analysis of the adsorbent indicated that coordination and hydrogen bonding between CIP and Mg(OH)2 nanocrystal might also be involved in the adsorption process. Moreover, the adsorbent could be easily recovered by pyrolysis and hydration without significant reduction of adsorption capacity. The superior adsorption behavior of Mg(OH)2 nanocrystal indicates that it may serve as a potential adsorbent material candidate for the selective removal of CIP from aquatic environments.
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Affiliation(s)
- Yongjing Wang
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China
| | - Jingjing Lin
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China
| | - Yonghao Wang
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China.
| | - Zemeng Liu
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China
| | - Jinlu Lian
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China
| | - Minghua Liu
- Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou 350108, China.
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Xiong Y, Chen J, Duan M, Li X, Li J, Zhang C, Fang S, Liu R, Zhang R. Insight into the Adsorption-Interaction Mechanism of Cr(VI) at the Silica Adsorbent Surface by Evanescent Wave Measurement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14414-14427. [PMID: 31607126 DOI: 10.1021/acs.langmuir.9b01556] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The investigation of adsorption performance at the adsorbent surface can help to reveal the treatment mechanism and improve the treatment efficiency of adsorption technology for heavy metal ions (HMIs). This work developed a methodology to investigate the adsorption behavior of HMI Cr(VI) at the silica surface by confined near-field evanescent wave (CNFEW) measurement. A silica optical fiber (SOF) was used as the adsorption substrate and light waveguide element to integrate both Cr(VI) adsorption and CNFEW production on its surface. According to the sensitive CNFEW response, the adsorption behavior of Cr(VI) was in situ monitored and real-time evaluated. The thermodynamic information of adsorption equilibrium constant (Kads) and adsorption free energy (ΔG) and dynamic information of the apparent adsorption rate (vads) and adsorption time (tads) were obtained through Langmuir isotherm and kinetic fitting, respectively. Different reaction performances between Cr(VI) and adsorption sites were successfully differentiated, evaluated, and characterized. A site-decided-mechanism was therefore presented to describe the surface interaction process for Cr(VI), which including fast adsorption on type I Si-O- site through electrostatic attraction with [Formula: see text] and slow adsorption on type II Si-OH site through coordinative interaction with ΔGSiOH-Cr(VI)II = -26.18 kJ mol-1. The adsorption mechanism of Cr(VI) at the SOF silica surface was furthermore verified by zeta potential analysis, Fourier transform infrared investigation, and fluorescence imaging. Unlike conventional ex situ or in bulk detection, the present CNFEW-based approach targets the "localized" adsorption of Cr(VI) adsorbed to the solid adsorbent surface. Consequently, our work favorably constructs a surface platform and provides new insights on understanding the adsorption mechanism for HMIs.
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Affiliation(s)
- Yan Xiong
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
- Compiègne University of Technology, CNRS Institute for Enzyme and Cell Engineering , Rue Roger Couttolenc, CS 60319 , Compiègne Cedex 60203 , France
| | - Jie Chen
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Ming Duan
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Xiang Li
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Jun Li
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Can Zhang
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Shenwen Fang
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Rui Liu
- School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu 610500 , China
| | - Run Zhang
- Australian Institute for Bioengineering and Nanotechnology, AIBN , The University of Queensland , St Lucia , Queensland 4072 , Australia
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Wang J, Dong R, Yang Q, Wu H, Bi Z, Liang Q, Wang Q, Wang C, Mei Y, Cai Y. One body, two hands: photocatalytic function- and Fenton effect-integrated light-driven micromotors for pollutant degradation. NANOSCALE 2019; 11:16592-16598. [PMID: 31460538 DOI: 10.1039/c9nr04295d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The threat of water pollution represents a serious global concern and requires rapid and efficient neutralization methods. Herein, we report novel two-in-one light-driven micromotors, i.e., light-driven TiO2-Fe Janus micromotors with both photocatalysis and photo-Fenton processes, for efficiently degrading organic pollutants in contaminated water. The TiO2-Fe micromotors moved rapidly by utilizing the photocatalytic H2O2 decomposition over TiO2 under UV irradiation, as well as generating highly reactive oxygen species responsible for the in situ degradation of the organic pollutants into non-harmful products. Notably, such coupling of photocatalysis generated on the TiO2 sides and the photo-Fenton process generated on the Fe sides, along with the rapid movement of these catalytic Janus micromotors, results in a synergetic effect that can greatly enhance the degradation of organic pollutants. The degradation efficiency of the TiO2-Fe micromotors is 52-fold that of only Fenton effects, and it is further improved by 40% compared to photocatalytic degradation alone. Considering the excellent advantages of the high efficiency, simple structure, reusability and the bubble-driven property, the new "on-the-fly" TiO2-Fe micromotor-based method has a promising potential for future water cleaning and waste-water treatments.
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Affiliation(s)
- Jiajia Wang
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Renfeng Dong
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Qianxian Yang
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Huiying Wu
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Zijun Bi
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Qiying Liang
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Qinglong Wang
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Chun Wang
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
| | - Yongfeng Mei
- Department of Materials Science, Fudan University, Shanghai, 200433, China.
| | - Yuepeng Cai
- School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China.
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Enhanced Potential Toxic Metal Removal Using a Novel Hierarchical SiO2–Mg(OH)2 Nanocomposite Derived from Sepiolite. MINERALS 2019. [DOI: 10.3390/min9050298] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Clays are widely used as sorbents for heavy metals due to their high specific surface areas, low cost, and ubiquitous occurrence in most soil and sediment environments. However, the low loading capacity for heavy metals is one of their inherent limitations. In this work, a novel SiO2–Mg(OH)2 nanocomposite was successfully prepared via sequential acid–base modification of raw sepiolite. The structural characteristics of the resulting modified samples were characterized by a wide range of techniques including field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and nitrogen physisorption analysis. The results show that a hierarchical nanocomposite constructed by loading the Mg(OH)2 nanosheets onto amorphous SiO2 nanotubes can be successfully prepared, and the nanocomposite has a high surface area (377.3 m2/g) and pore volume (0.96 cm3/g). Batch removal experiments indicate that the nanocomposite exhibits high removal efficiency toward Gd(III), Pb(II), and Cd(II), and their removal capacities were greatly enhanced in comparison with raw sepiolite, due to the synergistic effect of the different components in the hierarchical nanocomposite. This work can provide a novel route toward a hierarchical nanocomposite by using clay minerals as raw material. Taking into account the simplicity of the fabrication route and the high loading capacities for heavy metals, the developed nanocomposite also has great potential applications in water treatment.
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45
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Li Z, Pan Z, Wang Y. Enhanced adsorption of cationic Pb(II) and anionic Cr(VI) ions in aqueous solution by amino-modified nano-sized illite-smectite clay. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:11126-11139. [PMID: 30793246 DOI: 10.1007/s11356-019-04447-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
A raw illite-smectite mixed-layered clay (RI/S) was ground for preparing nano-sized I/S clay (NI/S) and subsequently amino-functionalized via grafting of 3-aminopropyltrithoxysilane (APTES) (NH2-RI/S and NH2-NI/S, respectively). The samples were characterized by particle size analysis, specific surface area measurement, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and 29Si nuclear magnetic resonance (29Si NMR). Compared to RI/S, NI/S has a narrow particle size distribution and appears in a platelet-like morphology due to the disintegration/exfoliation of RI/S after grinding. Based on the 29Si NMR spectra, the appearances of tri-silicate units indicate the chemically grafting of APTES molecules on NH2-RI/S and NH2-NI/S, respectively. NH2-NI/S can adsorb greater amounts of Pb(II) cations and Cr(VI) anions rather than NH2-RI/S since NH2-NI/S grafts more amounts of amine groups (-NH2). The isotherm data for adsorption of Pb(II) cations and Cr(VI) anions can be described by the Langmuir model at different temperatures (i.e., 10 °C, 30 °C, and 50 °C), respectively. The maximum adsorption amounts of Pb(II) cations and Cr(VI) anions onto NH2-NI/S calculated by the Langmuir isotherm model are 131.23 mg/g and 36.91 mg/g at 50 °C, respectively. The adsorptions of Pb(II) cations and Cr(VI) anions onto NH2-NI/S involve in the surface complexation of NI/S and amine groups.
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Affiliation(s)
- Zhenyuan Li
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Zhidong Pan
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Yanmin Wang
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
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46
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Cao ZF, Wen X, Wang J, Yang F, Zhong H, Wang S, Wu ZK. In situ nano-Fe3O4/triisopropanolamine functionalized graphene oxide composites to enhance Pb2+ ions removal. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.10.084] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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47
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Wang X, Lu J, Cao B, Liu X, Lin Z, Yang C, Wu R, Su X, Wang X. Facile synthesis of recycling Fe3O4/graphene adsorbents with potassium humate for Cr(VI) removal. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.10.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Yu S, Wang X, Ning S, Chen Z, Wang X. Highly efficient carbonaceous nanofiber/layered double hydroxide nanocomposites for removal of U(VI) from aqueous solutions. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2018-3061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The three-dimensional (3D) carbonaceous nanofiber and Ni-Al layered double hydroxide (CNF/LDH) nanocomposite was successfully prepared by a facile one-step hydrothermal methodology. Characterization of scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), XRD, and Fourier transformed infrared spectroscopy (FTIR) provided a demonstration that the modified CNF/LDH nanocomposite possessed abundant functional groups, for instance, metal-oxygen surface bonding sites (Ni–O as well as Al–O) and free-metal surface bonding sites (C–O, C–O–C, as well as O–C=O). The elimination of representative radionuclide (i.e. U(VI)) on the CNF/LDH nanocomposite from aqueous solutions was explored as a key function of pH, ionic strength, contact time, reaction temperature as well as radionuclide preliminary concentrations with the use of the batch methodology. As revealed by the findings, the sorption of radionuclides on CNF/LDH nanocomposite adhered to the pseudo-second-order kinetic model as well as Langmuir model. The maximum elimination capacity of U(VI) amounted to be 0.7 mmol/g. The independent of ionic strength shed light on the fact that inner-sphere surface complexation mainly overpowered radionuclide uptake by the CNF/LDH nanocomposite, which was further verified through the combination of FTIR and XPS spectral analyses. The abovementioned analyses shed light on the fact that the CNF/LDH nanocomposite can be regarded as a latent material to preconcentration radionuclides for environmental remediation.
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Affiliation(s)
- Shuqi Yu
- School of Resources, Environment and Materials , Guangxi University , Nanning 530004 , P.R. China
| | - Xiangxue Wang
- College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P.R. China
| | - Shunyan Ning
- School of Resources, Environment and Materials , Guangxi University , Nanning 530004 , P.R. China
| | - Zhongshan Chen
- College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P.R. China
| | - Xiangke Wang
- College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P.R. China , Tel. (Fax): +86-10-61772890
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49
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Si Q, Zhu Q, Xing Z. Simultaneous removal of nitrogen and phosphorus by magnesium-modified calcium silicate core-shell material in water. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:656-664. [PMID: 30098555 DOI: 10.1016/j.ecoenv.2018.07.120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/27/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
In this study, a new core-shell material (CMCS) is prepared with magnesium oxide (MgO) around calcium silicate hydrate (CSH), and CSH is prepared by SiO2 from the red mud. The CMCS simultaneously removes ammonia nitrogen (NH4+) and phosphate (PO43-) by chemical precipitation and it can achieve recovery of nitrogen and phosphorus. The removal process of NH4+ and PO43- is as follows. First, the shell of MgO is used to remove NH4+ and a part of the PO43- by the assisted adsorption and struvite (MgNH4PO4·6H2O) precipitation method. Then the CSH is used to remove the residual part of PO43- by chemical precipitation (Ca5(PO4)3OH, CaHPO4 and Ca3(PO4)2). Furthermore, the MgO shell of CMCS not only removes NH4+ and PO43-, but also can control the calcium ions (Ca2+) spill from CSH and pH in the process of removing NH4+ and PO43-. The removal rate of NH4+ and PO43- can reach 76.63% and 87.18%, respectively, in the solution in 80 min, but in the actual wastewater the removal rate of NH4+ and PO43- is 61.40% and 62.83%, respectively. Finally, CMCS was recycled five times and its removal rates of NH4+ and PO43- are 21.01% and 24.99%, respectively. The aim of this article is to present CMCS, which has a good effect on removing the NH4+ and PO43- simultaneously.
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Affiliation(s)
- Qishi Si
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China
| | - Qi Zhu
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China.
| | - Zipeng Xing
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China.
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Pan Y, Ke K, Cheng L, Zhao H. Nano-Mg(OH)2 platelets coated flexible polyurethane foam for fast and environment-friendly removal of Cu2+ from aqueous solution. POLYM-PLAST TECH MAT 2018. [DOI: 10.1080/03602559.2018.1542728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ying Pan
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, PR China
| | - Ke Ke
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, PR China
| | - Lin Cheng
- New Power Engineering Company, PowerChina Fujian Enginerring Co., Ltd, Fuzhou, PR China
| | - Hongting Zhao
- Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, PR China
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