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Xu J, Cheng H, Zhang H, Sun C, Tian H, Yang J, Ding Y, Lin X, Wang P, Huang C. Visible light irradiation enhanced sulfidated zero-valent iron/peroxymonosulfate process for organic pollutant degradation. ENVIRONMENTAL RESEARCH 2024; 257:119292. [PMID: 38824982 DOI: 10.1016/j.envres.2024.119292] [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: 02/17/2024] [Revised: 05/15/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
This study developed a novel process named sulfidated zero-valent iron/peroxymonosulfate/visible light irradiation (S-mZVI/PMS/vis) for enhanced organic pollutant degradation. The S-mZVI/PMS/vis process exhibited remarkable catalytic activity, achieving a 99.6% rhodamine B (RhB) removal within 10 min. The degradation rate constant of RhB by the S-mZVI/PMS/vis process was found to be 6.49 and 79.84 times higher than that by the S-mZVI/PMS and PMS/vis processes, respectively. Furthermore, the S-mZVI/PMS/vis process worked efficiently across a wide pH range (3.0-9.0), and the result of five-cycle experiments demonstrated the excellent reusability and stability of S-mZVI. Radical quenching tests and electron paramagnetic resonance analysis indicated that ·O2-, 1O2, and h+ significantly contributed to the degradation of RhB through the S-mZVI/PMS/vis process. The visible light irradiation increased the Fe2+ concentration, improved the Fe3+/Fe2+ cycle, and consequently enhanced the PMS decomposition, reactive species production, and RhB degradation. This work offers a promising strategy to highly efficiently activate PMS for organic pollutants elimination from aqueous solutions.
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Affiliation(s)
- Jialu Xu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Hao Cheng
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - He Zhang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Chengyou Sun
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Haoran Tian
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Jikun Yang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Yingxin Ding
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Xuan Lin
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Ping Wang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Chao Huang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China.
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Xu W, Xia C, He F, Wang Z, Liang L. Sulfidation of Nanoscale Zero-Valent Iron by Sulfide: The Dynamic Process, Mechanism, and Role of Ferrous Iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024. [PMID: 39262330 DOI: 10.1021/acs.est.4c04390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Sulfidation of nanoscale zerovalent iron (nZVI) can enhance particle performance. However, the underlying mechanisms of nZVI sulfidation are poorly known. We studied the effects of Fe2+ on 24-h dynamics of nZVI sulfidation by HS- using a dosed S to Fe molar ratio of 0.2. This shows that in the absence of Fe2+, HS- rapidly adsorbed onto nZVI particles and reacted with surface iron oxide to form mackinawite and greigite (<0.5 h). As nZVI corrosion progressed, amorphous FeSx in solution deposited on nZVI, forming S-nZVI (0.5-24 h). However, in the initial presence of Fe2+, the rapid reaction between HS- and Fe2+ produced amorphous FeSx, which deposited on the nZVI and corroded the surface iron oxide layer (<0.25 h). This was followed by redeposition of colloidal iron (hydr)oxide on the particle surface (0.25-8 h) and deposition of residual FeSx (8-24 h) on S-nZVI. S loading on S-nZVI was 1 order of magnitude higher when Fe2+ was present. Surface characterization of the sulfidated particles by TEM-SAED, XPS, and XAFS verified the solution dynamics and demonstrated that S2- and S22-/Sn2- were the principal reduced S species on S-nZVI. This study provides a methodology to tune sulfur loading and S speciation on S-nZVI to suit remediation needs.
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Affiliation(s)
- Wenqiang Xu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chenyun Xia
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi 214122, China
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi 214122, China
| | - Liyuan Liang
- Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, Tennessee 37996, United States
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Liu J, Huang X, Yi Z. Complexing agent-assisted Cr(VI) removal in a continuous fixed-bed system with nanoscale Fe 0/NaA molecular sieve membrane supported on nickel foam. CHEMOSPHERE 2024; 364:143003. [PMID: 39097113 DOI: 10.1016/j.chemosphere.2024.143003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/27/2024] [Accepted: 07/31/2024] [Indexed: 08/05/2024]
Abstract
Complexing agents (CAs) can be used for the removal of Cr(VI) via nanoscale Fe0 (nZVI) reduction in cost-effective manner. However, nZVI is prone to aggregation and passivation, and some conventional CAs are toxic and difficult to biodegrade, potentially causing secondary pollution. Therefore, selecting an environmentally friendly CA for assisting in the removal of Cr(VI) via supported nZVI is imperative. Herein, NaA molecular sieve membrane-supported nZVI (nZVI/NaA-NF) was prepared via the secondary growth and liquid-phase reduction method using nickel foam (NF) as the carrier. The physicochemical characteristics of nZVI/NaA-NF before and after reaction were analysed via SEM, EDS, and XPS. A CA-improved nZVI/NaA-NF was used for the effective removal of Cr(VI) in a continuous fixed-bed system. Furthermore, the influences of various experimental factors including the CA type, CA concentration, solution pH, space velocity, and inlet Cr(VI) concentration on Cr(VI) removal were systematically investigated. The results demonstrated that nZVI particles were homogeneously immobilized on the NaA molecular sieve membrane/NF for fresh nZVI/NaA-NF, and tetrasodium iminidisuccinate (IDS-4Na) inhibited the aggregation of Cr(III)/Fe(III) (hydr)oxide precipitates during the reaction. IDS-4Na demonstrated excellent promotive effect on Cr(VI) removal via nZVI/NaA-NF. The breakthrough time for Cr(VI) in the addition of IDS-4Na was considerably longer than that of nZVI/NaA-NF alone. The breakthrough concentration of Cr(VI) only reached 1.1% and 9.9% of the inlet concentration at 220 and 240 min, with an IDS-4Na concentration of 4 mM, a pH of 2.5, and a space velocity of 0.265 min-1. The Bohart-Adams model was appropriate to predict the initial part of Cr(VI) breakthrough curves in the nZVI/NaA-NF fixed bed. The saturated concentration (N0) increased with an increase in inlet Cr(VI) concentration. The Yoon-Nelson model afforded good fitting results for all breakthrough curves of Cr(VI). The k' value increased with an increase in space velocity, and the τ value decreased.
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Affiliation(s)
- Jian Liu
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China; Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hengyang, 421008, China; Hunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, 421008, China.
| | - Xueren Huang
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China
| | - Zhengji Yi
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China; Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hengyang, 421008, China; Hunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, 421008, China
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Fan B, Chen S, Zhu C, Zhu F, Huang D, Si D, Zhou B, Zhou D, He F, Gao S. Key role of hydrogen atoms in the preparation of sulfidated zero valent iron. WATER RESEARCH 2024; 256:121573. [PMID: 38608618 DOI: 10.1016/j.watres.2024.121573] [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: 12/21/2023] [Revised: 03/30/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024]
Abstract
Sulfidated zero valent iron (ZVI) is a popular material for the reductive degradation of halogenated organic pollutants. Simple and economic synthesis of this material is highly demanded. In this study, sulfidated micro/nanostructured ZVI (MNZVI) particles were prepared by simply heating MNZVI particles and sulfur elements (S0) in pure water (50℃). The iron oxides on the surface of MNZVI particles were conducive to sulfidation reaction, indicating the formation of iron-sulphide minerals (FeSx) on the surface of MNZVI particles might not be from the direct reaction of Fe0 with S0 (Fe0 and S0 acted as reductant and oxidant, respectively). As an important reductant, hydrogen atom (H•) can be generated from the reduction of H+ by MNZVI particles and participate in the formation of FeSx. Quenching experiment and cyclic voltammetry analysis proved the existence of H• on the surface of MNZVI particles. DFT calculation found that the potential barrier of H•/S0 and Fe0/S0 were 1.91 and 7.24 eV, respectively, indicating that S0 would preferentially react with H• instead of Fe0. The formed H• can quickly react with S0 to generate hydrogen sulfide (H2S), which can further react with iron oxides such as α-Fe2O3 on the surface of MNZVI particles to form FeSx. In addition, the H2 partial pressure in water significantly affected the amount of H• generated, thereby affecting the sulfidation efficiency. For TCE degradation, as the sulfur loading of sulfidated MNZVI particles increased, the contribution of H• significantly decreased while the contribution of direct electron transfer increased. This study provided new insights into the synthesis mechanism of sulfidated ZVI in water.
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Affiliation(s)
- Bo Fan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Si Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Changyin Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
| | - Fengxiao Zhu
- School of Environment, Nanjing Normal University, Nanjing 210023, PR China
| | - Danyu Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Dunfeng Si
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Bingnan Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Dongmei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
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Gong L, Ying S, Xia C, Pan K, He F. Carboxymethyl cellulose stabilization induced changes in particle characteristics and dechlorination efficiency of sulfidated nanoscale zero-valent iron. CHEMOSPHERE 2024; 355:141726. [PMID: 38521105 DOI: 10.1016/j.chemosphere.2024.141726] [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: 11/24/2023] [Revised: 02/13/2024] [Accepted: 03/13/2024] [Indexed: 03/25/2024]
Abstract
Polymer stabilization, exemplified by carboxymethyl cellulose (CMC), has demonstrated effectiveness in enhancing the transport of nanoscale zero-valent iron (nZVI). And, sulfidation is recognized for enhancing the reactivity and selectivity of nZVI in dechlorination processes. The influence of polymer stabilization on sulfidated nZVI (S-nZVI) with various sulfur precursors remains unclear. In this study, CMC-stabilized S-nZVI (CMC-S-nZVI) was synthesized using three distinct sulfur precursors (S2-, S2O42-, and S2O32-) through one-step approach. The antioxidant properties of CMC significantly elevated the concentration of reduced sulfur species (S2-) on CMC-S-nZVIs, marking a 3.1-7.0-fold increase compared to S-nZVIs. The rate of trichloroethylene degradation (km) by CMC-S-nZVIs was observed to be 2.2-9.0 times higher than that achieved by their non-stabilized counterparts. Among the three CMC-S-nZVIs, CMC-S-nZVINa2S exhibited the highest km. Interesting, while the electron efficiency of CMC-S-nZVIs surged by 7.9-12 times relative to nZVI, it experienced a reduction of 7.0-34% when compared with S-nZVIs. This phenomenon is attributed to the increased hydrophilicity of S-nZVI particles due to CMC stabilization, which inadvertently promotes the hydrogen evolution reaction (HER). In conclusion, the findings of this study underscores the impact of CMC stabilization on the properties and dechlorination performance of S-nZVI sulfidated using different sulfur precursors, offering guidance for engineering CMC-S-nZVIs with desirable properties for contaminated groundwater remediation.
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Affiliation(s)
- Li Gong
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Shuaixuan Ying
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Chenyun Xia
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Ke Pan
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China; Institute of Environmental Processes and Pollution Control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China.
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Yang Y, Zhan C, Li Y, Zeng J, Lin K, Sun J, Jiang F. In-situ reactivation and reuse of micronsized sulfidated zero-valent iron using SRB-enriched culture: A sustainable PRB technology. WATER RESEARCH 2024; 253:121270. [PMID: 38359598 DOI: 10.1016/j.watres.2024.121270] [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: 09/29/2023] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
Sulfidated zero-valent iron (S-ZVI) is an attractive material of permeable reactive barriers (PRBs) for the remediation of contaminated groundwater. However, S-ZVI is prone to be passivated due to the oxidation of reactive and conductive iron sulfide (FeSx) shell and the formation of inactive and non-conductive ferric (hydr)oxides, which serve as electron transfer barriers to hinder the electron flow from Fe° core to contaminants. This study thus proposed a novel approach for in-situ reactivation and reuse of micronsized S-ZVI (S-mZVI) in PRB using sulfate-reducing bacteria (SRB) enriched culture to realize long-lasting remediation of Cr(VI)-contaminated groundwater. S-mZVI were passivated after reactions with Cr(VI) due to the formation of electron transfer barriers (mainly inactive and non-conductive Fe(III) (hyd)oxides, which increased the polarization resistance from 16.38 to 27.38 kΩ cm2 and hindered the electron transfer from the Fe° core. Interestingly, the passivated S-mZVI was efficiently reactivated by providing the SRB-enriched culture and organic carbon within 12 h, and the Cr(VI) removal capacity of S-mZVI in the three use cycles increased to 37.4 mg Cr/g, which was 2.1 times higher than that of the virgin S-mZVI. After biological reactivation, the Rp of reactivated S-mZVI decreased to 12.30 kΩ cm2. SRB-mediated reactivation removed the electron transfer barriers via biotic and abiotic reduction of Fe(III) (hyd)oxides. Especially, the microbial Fe(III) reduction mediated by FmnA-dmkA-fmnB-pplA-ndh2-eetAB-dmkB protein family enhanced the Fe2+ release from the surface and the subsequent re-formation of reactive and conductive FeSx shell. A long-term PRB column test further demonstrated the feasibility of in-situ biological reactivation and reuse of S-mZVI for enhanced Cr(VI)-contaminated groundwater remediation. Within 64 days, the Cr(VI) removal capacity of S-mZVI in the four use cycles increased by 3.2 times, compared to the virgin one. The bio-reactivation using the SRB-enriched culture and sulfate locally-available in groundwater will reduce the chemical and maintenance costs associated with the frequent replacement of reactive ZVI-based materials. The PRB technology based on the bio-renewable S-mZVI can be a sustainable alternative to the conventional PRBs for the long-lasting and low-cost remediation of groundwater contaminated by oxidative pollutants.
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Affiliation(s)
- Yanduo Yang
- School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Chungeng Zhan
- School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Yu Li
- School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Jiajia Zeng
- School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Keyue Lin
- School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Jianliang Sun
- School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China.
| | - Feng Jiang
- School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou 510275, China.
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Yang G, Wei L, Wang X, Wu X, He Y, Li G, Chen T, Zhu W. Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater. Inorg Chem 2024; 63:1378-1387. [PMID: 38164710 DOI: 10.1021/acs.inorgchem.3c03906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The zero-valent iron (ZVI) has attracted increasing attention due to the enhanced reactivity of ZVI to uranium wastewater. However, ZVI practical application is hampered due to its susceptibility to oxidation and the formation of passivation layers during storage and in situ restoration. To address these issues, we used a biosulfuration approach to modify ZVI for application in uranium ore wastewater treatment. A series of physicochemical characterization tools and photoelectronic analyses showed that BS-ZVI considerably increased carrier separation efficiency and visible light absorption capacity, resulting in a significant photoassisted enhancement effect on uranium extraction. Accordingly, the uranium removal efficiency of BS-ZVI reached 91% within 60 min, and its maximum adsorption capacity was 336.3 mg/g. By analyzing the mechanism, the improved U(VI) removal performance was mostly responsible on the dissolution of the passivation layer on the surface of ZVI, the generation of Fe(II) and FeS, and the important role of Shewanella putrefaciens extracellular polymers (EPS). Overall, the BS-ZVI biohybrid merges with the high activity of ZVI, bio-FeS, and self-regeneration ability of bacteria, expanding a promising new approach for sustainable treatment of uranium mine wastewater.
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Affiliation(s)
- Guolin Yang
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
- Laboratory Animal Centre, North Sichuan Medical College, Nanchong, Sichuan 637100, P. R. China
| | - Ling Wei
- Department of Agricultural Science and Technology, Nanchong Vocation and Technical College, Nanchong, Sichuan 637131, P. R. China
| | - Xin Wang
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Xudong Wu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Yizhou He
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Guo Li
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Tao Chen
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
| | - Wenkun Zhu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China
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8
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Liu J, Sun S, Zhang H, Kong Q, Li Q, Yao X. Remediation materials for the immobilization of hexavalent chromium in contaminated soil: Preparation, applications, and mechanisms. ENVIRONMENTAL RESEARCH 2023; 237:116918. [PMID: 37611786 DOI: 10.1016/j.envres.2023.116918] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/01/2023] [Accepted: 08/16/2023] [Indexed: 08/25/2023]
Abstract
Hexavalent chromium is a toxic metal that can induce severe chromium contamination of soil, posing a potential risk to human health and ecosystems. In recent years, the immobilization of Cr(VI) using remediation materials including inorganic materials, organic materials, microbial agents, and composites has exhibited great potential in remediating Cr(VI)-contaminated soil owing to the environmental-friendliness, short period, simple operation, low cost, applicability on an industrial scale, and high efficiency of these materials. Therefore, a systematical summary of the current progress on various remediation materials is essential. This work introduces the production (sources) of remediation materials and examines their characteristics in detail. Additionally, a critical summary of recent research on the utilization of remediation materials for the stabilization of Cr(VI) in the soil is provided, together with an evaluation of their remediation efficiencies toward Cr(VI). The influences of remediation material applications on soil physicochemical properties, microbial community structure, and plant growth are summarized. The immobilization mechanisms of remediation materials toward Cr(VI) in the soil are illuminated. Importantly, this study evaluates the feasibility of each remediation material application for Cr(VI) remediation. The latest knowledge on the development of remediation materials for the immobilization of Cr(VI) in the soil is also presented. Overall, this review will provide a reference for the development of remediation materials and their application in remediating Cr(VI)-contaminated soil.
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Affiliation(s)
- Jiwei Liu
- College of Geography and Environment, Shandong Normal University, Jinan, Shandong, 250014, China.
| | - Shuyu Sun
- College of Geography and Environment, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Huanxin Zhang
- College of Geography and Environment, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Qiang Kong
- College of Geography and Environment, Shandong Normal University, Jinan, Shandong, 250014, China; Dongying Institute, Shandong Normal University, Dongying, Shandong, 257092, China
| | - Qian Li
- School of Modern Agriculture and Environment, Weifang Institute of Technology, Weifang, Shandong, 261000, China
| | - Xudong Yao
- Project Department, Shandong Luqiao Detection Technology Co., Ltd., Rizhao, Shandong, 276800, China
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Li J, Fan M, Yuan Z, Liu F, Li M. One-Pot Synthesis of Lamellar Fe-Cu Bimetal-Decorated Reduced Graphene Oxide and Its Enhanced Removal of Cr(VI) from Water. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2745. [PMID: 37887896 PMCID: PMC10608891 DOI: 10.3390/nano13202745] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/28/2023]
Abstract
Hexavalent chromium (Cr(VI)) is a typical heavy metal pollutant, making its removal from wastewater imperative. Although nanosized zero-valent iron (nZVI) and graphene-based materials are excellent remediation materials, they have drawbacks, such as agglomeration and being difficult to recycle. A facile synthesis method for decorating reduced graphene oxide (rGO) with ultrathin nZVI (within 10 nm) was explored in this study in order to develop an effective tool for Cr(VI) detoxication. Cu particles were doped in these composites for electron-transfer enhancement and were verified to improve the rate by 2.4~3.4 times. Batch experiments were conducted at different pHs, initial concentrations, ionic strengths, and humic acid (HA) concentrations. From these observations, it was found that the acid condition and appearance of Cu and rGO enhanced the treatment capacity. This procedure was fitted with a pseudo-second-order model, and the existence of NaCl and HA impeded it to some extent. Cr(VI) could be detoxified into Cr(III) and precipitated on the surface. Combining these analyses, a kinetics study, and the characterizations before and after the reaction, the removal mechanism of Cr(VI) was further discussed as a complex process involving adsorption, reduction, and precipitation. The maximum removal capacity of 156.25 mg g-1 occurred in the acid condition, providing a potential Cr(VI) remediation method.
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Affiliation(s)
- Jing Li
- Beijing Institute of Fashion Technology, Beijing 100029, China;
- School of Environment, Tsinghua University, Beijing 100084, China;
| | - Mingjie Fan
- Gudao Oil Production Plant, Shengli Oil Field, Dongying 257000, China;
| | - Ziting Yuan
- Hebei Key Laboratory of Environment Monitoring and Protection of Geological Resources, Hebei Geo-Environment Monitoring Institute, Shijiazhuang 050022, China;
| | - Fang Liu
- School of Environment, Tsinghua University, Beijing 100084, China;
- School of Transportation, Inner Mongolia University, Hohhot 010021, China
| | - Miao Li
- School of Environment, Tsinghua University, Beijing 100084, China;
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10
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Yang Z, Ding G, Yan L, Wang R, Zhang W, Wang X, Rao P. Ball-milled sulfide iron-copper bimetals based composite permeable materials for Cr (VI) removal: Effects of preparation parameters and kinetics study. CHEMOSPHERE 2023; 338:139388. [PMID: 37423409 DOI: 10.1016/j.chemosphere.2023.139388] [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: 03/12/2023] [Revised: 06/10/2023] [Accepted: 06/29/2023] [Indexed: 07/11/2023]
Abstract
Zero-valent iron (ZVI) and modified ZVI have been investigated extensively for groundwater remediation. However, ZVI based powder was difficult to be applied directly as permeable reactive barrier (PRB) materials due to their low water permeability and usage rate. In this study, sulfide iron-copper bimetal was prepared by ball milling, which is environment-friendly without second contamination. The optimal preparation parameters of sulfide iron-copper bimetal for Cr(VI) removal were determined (Cu/Fe ratio (w/w), 0.018; FeS/Fe ratio (w/w), 0.1213; ball milling speed, 450 rpm; ball milling time, 5 h). A composite permeable material was prepared by sintering a mixture of sulfide iron-copper bimetal, sludge, and kaolin. The parameters for composite permeable material preparation including sludge content and particle size, and sintering time were optimized, which were 60%, 60-75 mesh, and 4 h, respectively. The optimal composite permeable material was characterized by SEM-EDS, XRD, and FTIR. The results demonstrated preparation parameters can affect the hydraulic conductivity and hardness of composite permeable material. High sludge content, small particles size, and moderate sintering time resulted in high permeability of composite permeable material and were beneficial for Cr(VI) removal. The dominant Cr(VI) removal mechanism was reduction, and the reaction followed pseudo-first order kinetics. Conversely, low sludge content and large particle size, and long sintering time lead to low permeability of composite permeable material. Chromate removal was mainly by chemisorption following pseudo-second order kinetics. The hydraulic conductivity and hardness of the optimal composite permeable material achieved 1.732 cm/s and 50, respectively. The results of column experiments indicated that its Cr(VI) removal capacity was 0.54 mg/g, 0.39 mg/g and 0.29 mg/g at pH 5, 7 and 9, respectively. The ratio of Cr(VI) to Cr(III) on composite permeable material surface was similar under acidic and alkaline conditions. This study will provide an effective reactive material of PRB for field application.
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Affiliation(s)
- Zhenghan Yang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China.
| | - Guoyu Ding
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 10044, China
| | - Lili Yan
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China
| | - Runkai Wang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China
| | - Wenqi Zhang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China
| | - Xingrun Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Pinhua Rao
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China.
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11
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Cai S, Cao Z, Yang L, Wang H, He F, Wang Z, Xing B. Cations facilitate sulfidation of zero-valent iron by elemental sulfur: Mechanism and dechlorination application. WATER RESEARCH 2023; 242:120262. [PMID: 37390653 DOI: 10.1016/j.watres.2023.120262] [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: 04/21/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/02/2023]
Abstract
The solid-solid reaction of microscale zero-valent iron (mZVI) with elemental sulfur (S0) in water can form sulfidated mZVI (S-mZVI) with high reactivity and selectivity. However, the inherent passivation layer of mZVI hinders the sulfidation. In this study, we demonstrate that ionic solutions of Me-chloride (Me: Mg2+, Ca2+, K+, Na+ and Fe2+) can accelerate the sulfidation of mZVI by S0. The S0 with S/Fe molar ratio of 0.1 was fully reacted with mZVI in all solutions to form unevenly distributed FeS species on S-mZVIs as confirmed by SEM-EDX and XANES characterization. The cations depassivated the mZVI surface by driving the proton release from the surface site (FeOH) and resulting in localized acidification. The probe reaction test (tetrachloride dechlorination) and open circuit potential (EOCP) measurement demonstrated that Mg2+ was most efficient in depassivating the mZVI and therefore promoting sulfidation. The decrease of surface proton for hydrogenolysis on the S-mZVI synthesized in MgCl2 solution also inhibited the formation of cis-1,2-dichloroethylene by 14-79% compared to other S-mZVIs during trichloroethylene dechlorination. In addition, the synthesized S-mZVIs exhibited the highest reduction capacity reported so far. These findings provide a theoretical basis for the facile on-site sulfidation of mZVI by S0 with cation-rich natural waters for sustainable remediation of contaminated sites.
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Affiliation(s)
- Shichao Cai
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Environmental Processes and Pollution control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Zhenyu Cao
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Liwei Yang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Huaqing Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Environmental Processes and Pollution control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
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12
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Zhang Y, Duan Z, Jin Y, Han H, Xu C. Chemical Bond Bridging across Two Domains: Generation of Fe(II) and In Situ Formation of FeS x on Zerovalent Iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023. [PMID: 37433023 DOI: 10.1021/acs.est.3c02768] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
Sulfidation of zerovalent iron (SZVI) can strengthen the decontamination ability by promoting the electron transfer from inner Fe0 to external pollutants by iron sulfide (FeSx). Although FeSx forms easily, the mechanism for the FeSx bonding on the ZVI surface through a liquid precipitation method is elusive. In this work, we demonstrate a key pathway for the sulfidation of ZVI, namely, the in situ formation of FeSx on ZVI surface, which leads to chemical bonding across two domains: the pristine ZVI and the newly formed FeSx phase. The two chemically bridged heterophases display superior activity in electron transportation compared to the physically coated SZVI, eventually bringing about the better performance in reducing Cr(VI) species. It is revealed that the formation of chemically bonded FeSx requires balancing the rates for the two processes of Fe(II) release and sulfidation, which can be achieved by tuning the pH and S(-II) concentration. This study elucidates a mechanism for surface generation of FeSx on ZVI, and it provides new perspectives to design high-quality SZVI for environmental applications.
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Affiliation(s)
- Yue Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Zhongkai Duan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Yuhao Jin
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Haixiang Han
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Chunhua Xu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
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13
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Diao FM, Chen ML, Tong LY, Chen YN, Diao ZH. A green synthesized medicine residue carbon-based iron composite for the removal of chromium (VI) and cadmium (II): Performance, kinetics and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:84011-84022. [PMID: 37355513 DOI: 10.1007/s11356-023-28429-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 06/21/2023] [Indexed: 06/26/2023]
Abstract
Nowadays, clean-up of heavy metals from wastewaters using waste residue carbon-based material has received increasing attention. In this work, a novel Chinese medicine residue carbon-based nano zero-valent iron composite (CM-nZVI) had been successfully prepared using the combined Chinese medicine residue, FeCl3 and green tea extract. Cr(VI) and/ or Cd(II) removal in water by the CM-nZVI were systematacially investigated with a series of batch experiments. The most relevant findings indicated the adsorption efficiecy and capacity of Cr(VI) by CM-nZVI were respecitvely nearly 98% and 26 mg/g under optimized reaction conditions. The negative influences of the cations on the Cr(VI) removal followed the order of Al3+ > Ca2+ > Mg2+ Na+ > K+, but the anions followed the order of HCO3- > PO43- > NO3- > Cl- > SO42-. Humic acid (HA) and ionic strength with high concentrations severely inhibited Cr(VI) removal. The Cr(VI) adsorption on CM-nZVI fitted well by the pseudo-second-order kinetic and Langmuir models. A monolayer endothermic chemisorption occurred on Cr(VI) adsorption over CM-nZVI, and Cr(VI) removal by CM-nZVI primarily involved in the absorption, reduction, precipitation and complexation processes. Both Cr(VI) and Cd(II) removals had been achieved by CM-nZVI at their low concentrations. This CM-nZVI showed a better reusability proprity for Cr(VI) and Cd(II) removal with the regeneration of CM-nZVI through simple pickling. The outcomes of this work show that CM-nZVI could be used an effective material for heavy metals removal from water.
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Affiliation(s)
- Fa-Ming Diao
- Guangdong Hospital of Traditional Chinese Medicine, Guangzhou, 510120, China
| | - Man-Li Chen
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Lin-Yin Tong
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Ying-Nan Chen
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zeng-Hui Diao
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
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14
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Zhou F, Liu Q, Qin Y, Liu W, Zhang L. Efficient Fe(III)/Fe(II) cycling mediated by L-cysteine functionalized zero-valent iron for enhancing Cr(VI) removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 456:131717. [PMID: 37245369 DOI: 10.1016/j.jhazmat.2023.131717] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/28/2023] [Accepted: 05/24/2023] [Indexed: 05/30/2023]
Abstract
Herein, L-cysteine (Cys) was modified on zero-valent iron (C-ZVIbm) by using a mechanical ball-milling method to improve the surface functionality and the Cr(VI) removal efficiency. Characterization results indicated that Cys was modified on the surface of ZVI by the specific adsorption of Cys on the oxide shell to form a -COO-Fe complex. The Cr(VI) removal efficiency of C-ZVIbm (99.6%) was much higher than that of ZVIbm (7.3%) in 30 min. The attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) analysis inferred that Cr(VI) was more likely to be adsorbed on the surface of C-ZVIbm to form bidentate binuclear inner-sphere complexes. The adsorption process was well-matched to the Freundlich isotherm and the pseudo-second-order kinetic model. Electrochemical analysis and electron paramagnetic resonance (ESR) spectroscopy revealed that Cys on the C-ZVIbm lowered the redox potential of Fe(III)/Fe(II), and favored the surface Fe(III)/Fe(II) cycling mediated by the electrons from Fe0 core. These electron transfer processes were beneficial to the surface reduction of Cr(VI) to Cr(III). Our findings provide new understandings into the surface modification of ZVI with a low-molecular weight amino acid to promote in-situ Fe(III)/Fe(II) cycling, and have great potential for the construction of efficient systems for Cr(VI) removal.
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Affiliation(s)
- Fengfeng Zhou
- Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Qiangling Liu
- Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Yaxin Qin
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Wei Liu
- Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China.
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
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15
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Dai Y, Dong Y, Duan L, Zhang B, Wang S, Zhao S. Unraveling the neglected role of elemental sulfur in chromate removal by sulfidated microscale zero-valent iron. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131025. [PMID: 36801721 DOI: 10.1016/j.jhazmat.2023.131025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/12/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Elemental sulfur (S0), as an oxidation product of low-valent sulfur, is widely believed to inhibit the reactivity of sulfidated zero-valent iron (S-ZVI). However, this study found that the Cr(VI) removal and recyclability of S-ZVI with S0 as the dominant sulfur species were superior to those FeS or iron polysulfides (FeSx, x > 1) dominated ones. The more S0 directly mixed with ZVI, the better Cr(VI) removal obtained. This was ascribed to the formation of micro-galvanic cells, the semiconductor properties of cyclo-octasulfur S0 with sulfur atom substituted by Fe2+, and the in situ generations of highly reactive iron monosulfide (FeSaq) or polysulfides precursors (FeSx,aq). The Cr(VI) sequestration of FeSx,aq was 1.2-2 times that of FeSaq, and the reaction rate of amorphous iron sulfides (FexSy) in the removal of Cr(VI) by S-ZVI was 8- and 66-fold faster than that of crystalline FexSy and micron ZVI, respectively. The interaction of S0 with ZVI required direct contact and needed to overcome the spatial barrier caused by FexSy formation. These findings reveal the role of S0 in Cr(VI) removal by S-ZVI and guide the future development of in situ sulfidation technologies to utilize the highly reactive FexSy precursors for field remediation.
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Affiliation(s)
- Yinshun Dai
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Yamin Dong
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Liangfeng Duan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Baiyu Zhang
- The Northern Region Persistent Organic Pollution (NRPOP) Control Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3×5, Canada
| | - Shuguang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Shan Zhao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China.
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16
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Zhao X, Liang H, Wang Z, Li D, Shen X, Xu X, Li K, Xiang Q, Wu Y, Chen Q. Preparation of N-doped cellulose-based hydrothermal carbon using a two-step hydrothermal induction assembly method for the efficient removal of Cr(VI) from wastewater. ENVIRONMENTAL RESEARCH 2023; 219:115015. [PMID: 36535391 DOI: 10.1016/j.envres.2022.115015] [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: 09/29/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Cr(VI) pollution is a growing problem that causes the deterioration of the environment and human health. We report the development of an effective adsorbent for the removal of Cr(VI) from wastewater. N-doped cellulose-based hydrothermal carbon (N-CHC) was prepared via a two-step hydrothermal method. The morphology and structural properties of N-CHC were investigated by various techniques. N-CHC has many O and N groups, which are suitable for Cr(VI) adsorption and reduction. Intermittent adsorption experiments showed that N-CHC had an adsorption capacity of 151.05 mg/g for Cr(VI) at pH 2, indicating excellent adsorption performance. Kinetic and thermodynamic analyses indicates that the adsorption of Cr(VI) on N-CHC follows a monolayer uniform adsorption process, which is a spontaneous endothermic process dominated by chemical interaction and limited by diffusion within particles. In a multi-ion system (Pb2+, Cd2+, Mn7+, Cl-, and SO42-), the selectivity of N-CHC toward Cr(VI) was 82.62%. In addition, N-CHC demonstrated excellent reuse performance over seven adsorption-desorption cycles; the Cr(VI) removal rate of N-CHC in 5-20 mg/L wastewater was >99.87%, confirming the potential of N-CHC for large-scale applications. CN/C-OR, pyridinic-N, and pyrrolic-N were found to play a critical role in the adsorption process. This study provides a new technology for Cr(VI) pollution control that could be utilized in large-scale production and other environmental applications.
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Affiliation(s)
- Xinkun Zhao
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Hongxu Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Zihao Wang
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Daijia Li
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Xiaoyan Shen
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Xiaoya Xu
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Kun Li
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Qingyue Xiang
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Yihan Wu
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China
| | - Qingfeng Chen
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, China.
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17
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Fan B, Li X, Zhu F, Wang J, Gong Z, Shao S, Wang X, Zhu C, Zhou D, Gao S. Anti-passivation ability of sulfidated microscale zero valent iron and its application for 1,1,2,2-tetrachloroethane degradation. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130194. [PMID: 36270192 DOI: 10.1016/j.jhazmat.2022.130194] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/27/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The performance of sulfidated zero valent iron (ZVI) for the degradation of chlorinated hydrocarbons under aerobic conditions remains unclear. In this study, sulfidated microscale ZVI (S-mZVI) was prepared for 1,1,2,2-tetrachloroethane (TeCA) degradation under aerobic conditions. Compared with mZVI, S-mZVI showed excellent passivation resistance during the degradation of TeCA and its hydrolysis/reduction products. This was probably because the existence of FeSx shell (FeS/FeS2/FeSn) protected the internal ZVI core from passivation. Though the outer layer of FeSx shell could be oxidized to FeSn and Fe2(SO4)3 as the reaction proceeded, the inner layer remained stable, which maintained the fast electron transfer capability of S-mZVI. The high temperature could enhance the degradation of TeCA, without compromising the anti-passivation and reusability of S-mZVI. Even after the fifth cycle, S-mZVI could still efficiently degrade 90% of TeCA within 24 h. Furthermore, it was found that the degradation of TeCA and its reduction products (e.g., dichloroethylene (DCE)) by S-mZVI relied on direct electron transfer and hydrogen radical (H•), respectively, which might explain the lower levels of toxic DCE in the S-mZVI system. This study provides valuable information for the practical application of S-mZVI in the treatment of wastewater containing halogenated hydrocarbons under ambient conditions.
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Affiliation(s)
- Bo Fan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xiaoshuai Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Fengxiao Zhu
- School of Environment, Nanjing Normal University, Nanjing 210023, PR China
| | - Jiahao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhimin Gong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shuai Shao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xiaonan Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Changyin Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| | - Dongmei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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18
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He K, Wang S, Liu Y, Cao Z, Yang L, He F. Enhanced removal of hexavalent chromium by lignosulfonate modified zero valent iron: Reaction kinetic, performance and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159397. [PMID: 36240939 DOI: 10.1016/j.scitotenv.2022.159397] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/03/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
The application of lignin derivative as modifier is an economical and efficient approach to improve the reactivity of raw material towards pollutant removal. In this study, lignosulfonate modified zero valent iron (LS-ZVI) was firstly prepared by ball-milling method and utilized for Cr(VI) removal under different conditions. The comparative experiments showed that lignosulfonate modification could significantly enhance the Cr(VI) removal by ZVI from <10 % to 100 % within 90 min reaction. Compared to ZVI, the specific surface area of LS-ZVI increased 3.4 times and surface Fe(0) content increased from 3.4 % to 10.5 % due to the surface erosion, resulting in the high-efficient Cr(VI) removal. Solution and solid-phase analyses indicated that Fe(0) played dominated role and generated Fe(II) involved in Cr(VI) removal process, which mainly included rapid adsorption, reduction and co-precipitation. Batch experiments revealed that lower pH conditions were beneficial for Cr(VI) removal and the effect of co-existing ions (Ca2+, Mg2+, NO3-, Cl-, and SO42-) was negligible except the inhibitory effect of NO3-. Moreover, LS-ZVI also exhibited excellent removal performance for Ni(II), Zn(II), and Cd(II) with removal efficiency beyond 96.6 %. Overall, this work provides a feasible approach for enhancing the reactivity of commercial ZVI in the treatment of heavy metal pollution.
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Affiliation(s)
- Kai He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Shaoxing Research Institute, Zhejiang University of Technology, Shaoxing 312000, China
| | - Shuchen Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yu Liu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhenyu Cao
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Liwei Yang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
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19
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Oral O, Yigit A, Kantar C. Role of reactor type on Cr(VI) removal by zero-valent iron in the presence of pyrite: Batch versus sequential batch reactors. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115854. [PMID: 35961140 DOI: 10.1016/j.jenvman.2022.115854] [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: 04/19/2022] [Revised: 07/14/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
This study was conducted to understand the role of application sequence of pyrite and zero-valent iron (Fe0) (simultaneous vs. sequential) on chromium (VI) removal by Fe0. In batch experiments, pyrite and Fe0 were homogeneously mixed in batch reactors maintained at a constant total solids loading of 2 g L-1. In sequential batch experiments, however, the first reactor containing variable doses of pyrite was operated for 20 min, and the liquid fraction from the first reactor was then subsequently loaded into the second reactor containing a fixed Fe0 dose of 1.2 g L-1. The batch reactors achieved much higher Cr(VI) removal efficiency than sequential batch reactors under similar operating conditions due to discrepancies in Fe redox cycling activities between these two systems. In batch reactors, the Fe0 particles deposited on pyrite surface due to electrostatic attraction between negatively charged pyrite and positively charged Fe0, thus, rendering the overall solids surface charge neutral at optimum pyrite and Fe0 doses. As a result, the whole system behaved like a composite material, with pyrite functioning as a support material for Fe0. This stimulated Fe redox cycling more effectively to generate new Fe(II) sites on Fe0 for enhanced Cr(VI) removal relative to Fe0 only system. In sequential batch reactors, however, the Fe redox cycling activity was limited, but significantly increased with increasing pyrite dose in the first reactor. Overall, our results indicate that the stimulatory effect of pyrite on Cr(VI) removal by Fe0 may be much higher if the reactors are operated in batch mode.
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Affiliation(s)
- Ozlem Oral
- Canakkale Onsekiz Mart University, Department of Environmental Engineering, 17100, Canakkale, Turkey.
| | - Aynur Yigit
- Canakkale Onsekiz Mart University, Department of Environmental Engineering, 17100, Canakkale, Turkey
| | - Cetin Kantar
- Canakkale Onsekiz Mart University, Department of Environmental Engineering, 17100, Canakkale, Turkey.
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20
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Gao J, Liu X, Ren P, Gao J, Chen Y, Chen Z. Removal behavior and mechanism of amino/carboxylate-functionalized Fe@SiO 2 for Cr(VI) and Cd(II) from aqueous solutions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:72058-72073. [PMID: 35610446 DOI: 10.1007/s11356-022-20048-w] [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: 08/25/2021] [Accepted: 03/29/2022] [Indexed: 06/15/2023]
Abstract
The novel iron-based reductive particles, functionalized with amino and carboxylic functional groups, were synthesized to remove Cr(VI) and Cd(II) ions from aqueous solutions. The morphological structure and surface functional groups of new composites were characterized with SEM, XRD, FTIR, BET, and other techniques. The influence of pH, initial concentration, adsorbent dosing, and temperature on removal efficiencies were explored by batch experiments. The adsorption capacity of Cr(VI) and Cd(II) increased by 159.95% and 76.60%, respectively, compared with Fe0, reaching 47.638 and 62.047 mg/g. EDS and XPS analysis showed most of Cr(VI) was reduced to Cr(III) and precipitated as ferrochrome oxide, and Cd(II) was mainly precipitated as hydroxide. Reduction-precipitation and complexation may predominate in the removal process of Cr(VI), which fitted well with Langmuir and Freundlich models and pseudo-second-order kinetics. While hydrolysis and complexation may prevail for Cd(II), which was suited with Langmuir model and pseudo-second-order kinetics. Having good magnetic properties, the A/C-Fe@SiO2 particles exhibited excellent reusable stability after four times regeneration experiments, promising a prospect for in-situ remediations of groundwater contaminated by Cr(VI) and Cd(II).
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Affiliation(s)
- Jingqing Gao
- School of Ecology and Environment, ZhengZhou University, Zhengzhou, 450001, People's Republic of China.
| | - Xiaobang Liu
- School of Ecology and Environment, ZhengZhou University, Zhengzhou, 450001, People's Republic of China
| | - Peng Ren
- School of Ecology and Environment, ZhengZhou University, Zhengzhou, 450001, People's Republic of China
| | - Jianlei Gao
- School of Ecology and Environment, ZhengZhou University, Zhengzhou, 450001, People's Republic of China
| | - Yong Chen
- Department of Resources and Environmental Engineering, Henan University of Engineering, Zhengzhou, 451191, People's Republic of China
| | - Zhijun Chen
- School of Chemical Engineering and Material Science, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou, 450002, People's Republic of China
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21
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Qu J, Wu Z, Liu Y, Li R, Wang D, Wang S, Wei S, Zhang J, Tao Y, Jiang Z, Zhang Y. Ball milling potassium ferrate activated biochar for efficient chromium and tetracycline decontamination: Insights into activation and adsorption mechanisms. BIORESOURCE TECHNOLOGY 2022; 360:127407. [PMID: 35667535 DOI: 10.1016/j.biortech.2022.127407] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/26/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Herein, novel Fe-biochar composites (MBCBM500 and MBCBM700) were synthesized through K2FeO4 co-pyrolysis and ball milling, and were used to eliminate Cr(VI)/TC from water. Characterization results revealed that higher temperature promoted formation of zero-valent iron and Fe3C on MBCBM700 through carbothermal reduction between K2FeO4 and biochar. The higher specific surface area and smaller particle size of MBCBM500/700 stemmed from the corrosive functions of K and the ball milling process. And the maximal uptake amount of MBCBM700 for Cr(VI)/TC was 117.49/90.31 mg/g, relatively higher than that of MBCBM500 (93.86/84.15 mg/g). Furthermore, ion exchange, pore filling, precipitation, complexation, reduction and electrostatic attraction were proved to facilitate the adsorption of Cr(VI), while hydrogen bonding force, pore filling, complexation and π-π stacking were the primary pathways to eliminate TC. This study provide a reasonable design of Fe-carbon materials for Cr(VI)/TC contained water remediation, which required neither extra modifiers nor complex preparation process.
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Affiliation(s)
- Jianhua Qu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Zhihuan Wu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Yang Liu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Ruolin Li
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Di Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Siqi Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Shuqi Wei
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Jingru Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Yue Tao
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Zhao Jiang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
| | - Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun 130102, China.
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22
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Basnet P, Ojha PK, Gyawali D, Ghimire KN, Paudyal H. Thermochemical study of Cr(VI) sequestration onto chemically modified Areca catechu and its recovery by desorptive precipitation method. Heliyon 2022; 8:e10305. [PMID: 36090219 PMCID: PMC9449776 DOI: 10.1016/j.heliyon.2022.e10305] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/28/2022] [Accepted: 08/11/2022] [Indexed: 01/19/2023] Open
Abstract
A new biosorbent for Cr(VI) sequestration was investigated from betel nut waste (BNW), Areca catechu, by H2SO4 charring. Aqueous insolubility and Cr(VI) uptake capacity of native BNW were potentially improved after H2SO4 modification due to cross-linking reaction of betel nut cellulose, thereby creating suitable complexation sites for Cr(VI) ion removal. Langmuir isotherm and pseudo second order (PSO) kinetic models described well with the experimental data. A trace amount of Cr(VI) was effectively removed below the safe drinking water standard (WHO, 0.05 mg/L) using charred BNW (CBNW). The negative value of ΔG° evaluated for all the temperatures suggested the spontaneous nature of Cr(VI) sequestration and positive value of ΔH° (42.43±0.13 kJ/mol) confirmed an endothermic reaction. Co-existing NO3−, Cl−, Na+ and Zn2+ ions showed negligible interferences, whereas SO42− and PO43− notably reduced Cr(VI) uptake capacity of CBNW. More than 98% of adsorbed Cr(VI) was desorbed using 1M NaOH solution. A light yellow precipitate of BaCrO4 was recovered from the desorbed solution after precipitation with BaCl2 solution. Therefore, the CBNW biosorbent investigated in this work is expected to be a promising material for Cr(VI) sequestration and its recovery from polluted water.
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Affiliation(s)
- Prabin Basnet
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- Nepal Engineering College, Pokhara University, Changunarayan, Bhaktapur, Nepal
| | - Pawan Kumar Ojha
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Deepak Gyawali
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- Ministry of Forests and Environment, Department of Environment, Government of Nepal, Nepal
| | - Kedar Nath Ghimire
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Hari Paudyal
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- Corresponding author.
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Han P, Xie J, Qin X, Yang X, Zhao Y. Experimental study on in situ remediation of Cr(VI) contaminated groundwater by sulfidated micron zero valent iron stabilized with xanthan gum. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154422. [PMID: 35276162 DOI: 10.1016/j.scitotenv.2022.154422] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/02/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Micron zero valent iron (mZVI) was an underground remediation material, which had great application potential to replace nano zero valent iron (nZVI) from the perspective of economic and health benefits. However, mZVI was highly prone to gravitational settling, which limited its wide application for in situ remediation of contaminated groundwater. This paper was devoted to develop an efficient and economical groundwater remediation material based on mZVI, which should possess excellent stability, reactivity, and transportability. Thereby xanthan gum (XG) stabilized and Na2S2O4 sulfidated mZVI (XG-S-mZVI) was synthesized and characterized with SEM, XRD, XPS, and FTIR techniques. In terms of stability, the adsorbed XG and the dispersed XG worked together to resist the sedimentation of S-mZVI. In terms of reactivity, sulfidation enhanced the electron transfer rate and electron selectivity of XG-S-mZVI, thereby improved the reactivity of XG-S-mZVI. The hexavalent chromium (Cr(VI)) removal rate constant by XG-S-mZVI was determined to be 832.4 times than bare mZVI. In terms of transportability, the transportability of XG-S-mZVI was greatly improved (~80 cm in coarse sand and ~50 cm in medium sand). Straining was the main mechanism of XG-S-mZVI retention in porous media. XG-S-mZVI in situ reactive zone (XG-S-mZVI-IRZ) was only suitable to the media with a grain size larger than 0.25 mm. This study could provide theoretical support and guidance for the implementation of IRZ technology based on mZVI.
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Affiliation(s)
- Peiling Han
- Key Laboratory of Groundwater Resources and Environment of Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Jiayin Xie
- Key Laboratory of Groundwater Resources and Environment of Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Xueming Qin
- Key Laboratory of Groundwater Resources and Environment of Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Xinru Yang
- Key Laboratory of Groundwater Resources and Environment of Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Yongsheng Zhao
- Key Laboratory of Groundwater Resources and Environment of Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China.
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24
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Qian D, Liu H, Hu F, Song S, Chen Y. Extracellular electron transfer-dependent Cr(VI)/sulfate reduction mediated by iron sulfide nanoparticles. J Biosci Bioeng 2022; 134:153-161. [PMID: 35690565 DOI: 10.1016/j.jbiosc.2022.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 01/18/2023]
Abstract
The slow electron transfer rate is a bottleneck to the biological wastewater treatment. This study evaluated the concomitant biotransformation and nonenzymatic reduction of Cr(VI) mediated by sulfate reducing bacteria (SRB), especially for the reinforcing Cr(VI) reduction via accelerating the electron transfer by the in-situ biosynthesized iron sulfide nanoparticles (FeS NPs). The kinetic results showed that 10 mg/L Cr(VI) was completely removed by pre-cultured FeS NPs within 7 h with kCr(VI) of 2.6 × 10-4 s-1, one magnitude higher than that without FeS NPs. Despite its competing electron to postpone sulfate reduction, the reduction of Cr(VI) was markedly improved via nonenzymatic reactions by the sulfide, the product of sulfate reduction. In the reinforcing system (bio-FeS NP@SRB), the bio-FeS NPs served as an electronic bypass conduit for CoQ could significantly amplify the electron flux, and switch the Cr(VI) reduction from intracellular space to extracellular environment, which had a great detoxification effect on the microorganisms, eventually markedly promoted electron transfer extracellularly and the reduction of Cr(VI). After the long-term acclimatization, Desulfovibrio became the dominant bacteria at the genus level and accounted for the relative abundance of 32%. This study provides an alternative to use biogenic FeS NPs for Cr(VI) remediation.
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Affiliation(s)
- Danshi Qian
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Huimin Liu
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Fan Hu
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Song Song
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Yuancai Chen
- Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China.
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25
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Sewage-sludge derived activated carbon impregnated with polysulfide-sulfidated nZVI:A promising material for Cr(Ⅵ) reductive stabilization. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Removal of Chromium(VI) by Nanoscale Zero-Valent Iron Supported on Melamine Carbon Foam. NANOMATERIALS 2022; 12:nano12111866. [PMID: 35683722 PMCID: PMC9181856 DOI: 10.3390/nano12111866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/20/2022] [Accepted: 05/24/2022] [Indexed: 11/23/2022]
Abstract
The overuse of chromium (Cr) has significantly negatively impacted human life and environmental sustainability. Recently, the employment of nano zero-valent iron (nZVI) for Cr(VI) removal is becoming an emerging approach. In this study, carbonized melamine foam-supported nZVI composites, prepared by a simple impregnation–carbonization–reduction method, were assessed for efficient Cr(VI) removal. The prepared composites were characterized by XPS, SEM, TEM, BET and XRD. Batch experiments at different conditions revealed that the amount of iron added, the temperature of carbonization and the initial Cr(VI) concentration were critical factors. Fe@MF-12.5-800 exhibited the highest removal efficiency of 99% Cr(VI) (10 mg/L) at neutral pH among the carbonized melamine foam-supported nZVI composites. Its iron particles were effectively soldered onto the carbonaceous surfaces within the pore networks. Moreover, Fe@MF-12.5-800 demonstrated remarkable stability (60%, 7 days) in an open environment compared with nZVI particles.
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27
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Dai Y, Duan L, Du W, Yang X, Sun S, Xiu Q, Wang S, Zhao S. Morphology and structure of in situ FeS affect Cr(VI) removal by sulfidated microscale zero-valent iron with short-term ultrasonication. CHEMOSPHERE 2022; 290:133372. [PMID: 34952013 DOI: 10.1016/j.chemosphere.2021.133372] [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: 07/15/2021] [Revised: 11/22/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
The properties of sulfidated zero-valent iron (S-ZVI) are considered to be determined by the entire structure of Fe0 and FexSy as a whole, but few studies focus on the influence of the morphology and structure of the external FexSy layer on the performance of S-ZVI. In this study, after the sulfidation of microscale ZVI in acetate (HAc-NaAc) and 2-(N-morpholino) ethanesulfonic acid (MES) buffer solution, the S-mZVIHAc-NaAc surface presented the in situ growth of the FeS nanosheet, while the S-mZVIMES surface was dominated by agglomerated FeS sub-micron particles. Under short-term ultrasonication, S-mZVIHAc-NaAc was superior to removing Cr(VI) than S-mZVIMES, and the clearance of the passivation layer by ultrasound maximized the conductivity of the FeS nanosheet to strengthen the sulfidation contribution. However, agglomerated FeS particles were easily separated from S-mZVIMES by ultrasonication, resulting in the suppression of its sulfidation contribution. The removal of Cr(VI) by S-ZVI increased linearly with FeS content, and the chemical combination of FeS with ZVI had more significant synergy than their physical mixture. The FeS nanosheet with excellent conductivity and large vertical space benefited the generation of dissolved and surface-associated Fe(II) as electron donors and structural Fe(II) as the electron shuttle. Understanding the relationship between FeS structure and S-ZVI performance will pave a way for optimizing the synthesis of S-ZVI.
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Affiliation(s)
- Yinshun Dai
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Liangfeng Duan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Weiyu Du
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Xiaowei Yang
- Huadian Qingdao Power Generation Corporation Limited, Qingdao, 226031, China
| | - Shiwen Sun
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Qi Xiu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Shuguang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China
| | - Shan Zhao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China.
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28
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Huang J, Zhao D, Zhao Y, Tu Y, Wang R. Polyvinylpyrrolidone supported nZVI/Ni bimetallic nanoparticles for enhanced high-performance removal of aqueous Cr(VI). Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139375] [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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29
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Hydrogen Peroxide Activation with Sulfidated Zero-Valent Iron for Synchronous Removal of Cr(VI) and BPA. Catalysts 2022. [DOI: 10.3390/catal12030252] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
In this work, the synchronous removal of Cr(VI) and bisphenol A (BPA) in a heterogeneous Fenton process with sulfidated nanoscale zero-valent iron (S-nZVI) as the reductant and catalyst was systematically evaluated. Compared to other systems including S-nZVI or H2O2 alone, a simultaneous BPA degradation and Cr(VI) removal could be achieved in the S-nZVI/H2O2 system at an optimum pH of 3. It was, interestingly, found that 7.8% of BPA and 98.2% of Cr(VI) were removed within 60 min in presence of S-nZVI alone, whereas, correspondingly, 98.2% of BPA and 96.9% of Cr(VI) were eliminated in the S-nZVI/H2O2 system. Specifically, humic acid (HA) and H2PO4− inhibited the deterioration of BPA but posed no significant effect on Cr(VI) removal. NO3− had a slight lifting effect on the removal of BPA and Cr(VI), while HCO3− showed a relatively weak prohibition. Experiments with EPR and radical probe tests also provide direct evidence that hydroxyl radicals was monitored in the S-nZVI/H2O2 system, which not only degraded BPA but also inhibited the reduction of Cr(VI). It could not be ignored that FeS accelerated Fe0 corrosion to release Fe2+. In, addition, Fe0, Fe2+ and S2+ could react with Cr(VI) while the most of produced Cr(III) was co-precipitated in the form of CrxFe1−xOOH film. The study confirmed that it was feasible for S-nZVI/H2O2 system to remove synchronously organic pollutants and heavy metal.
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He F, Yu Y, Wan W, Liang L. Enhanced dechlorination of trichloroethene by sulfidated microscale zero-valent iron under low-frequency AC electromagnetic field. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127020. [PMID: 34481402 DOI: 10.1016/j.jhazmat.2021.127020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/21/2021] [Accepted: 08/21/2021] [Indexed: 06/13/2023]
Abstract
In this study an electromagnetic heating strategy is proposed for remediation of trichloroethene (TCE) by ball milled, sulfidated microscale zero valent iron (S-mZVIbm) particles. S-mZVIbm is ferromagnetic, which generates heat under the application of a low-frequency alternating current electromagnetic field (AC EMF). We found that the temperature reached up to ~120 ℃ during 30-min electromagnetic induction heating of 10 g/L S-mZVIbm (with S/Fe molar ratio of 0.1), compared with ~55 ℃ and ~80 ℃ for ZVI and ball milled mZVIbm, respectively. The application of AC EMF accelerated the TCE degradation rate (kTCE = 5.5 × 10-1 h-1) by up to 4-fold without compromising or even enhancing electron efficiency of S-mZVIbm compared to no-heating. Furthermore, this process halved the generation of chlorinated intermediate, cis-DCE. In contrast, water-bath heating only increased the dechlorination rate 2-fold with unchanged cis-DCE generation and lowered electron efficiency. This is attributed to both rising temperature by induction heating and accelerated ZVI corrosion and surface Fe0 exposure caused by AC EMF. In real groundwater, the AC EMF maintained the same promoting effects for TCE dechlorination by S-mZVIbm. This study shows that combination of filed-scale available AC EMF with S-mZVIbm provides a promising approach for remediation of chlorinated hydrocarbons in contaminated groundwater.
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Affiliation(s)
- Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Ye Yu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wubo Wan
- Marine Food Engineering Technology Research Center of, Hainan Province, Hainan Tropical Ocean University, Sanya 572022, China
| | - Liyuan Liang
- Department of Earth and Planetary Sciences, University of, Tennessee, Knoxville, TN 37996, USA
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31
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Zhou L, Li Z, Yi Y, Tsang EP, Fang Z. Increasing the electron selectivity of nanoscale zero-valent iron in environmental remediation: A review. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126709. [PMID: 34315021 DOI: 10.1016/j.jhazmat.2021.126709] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/06/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
Nanoscale zero-valent iron nanoparticles (nZVI) have been used for groundwater remediation and wastewater treatment due to their high reactivity, high adsorption capacity and nontoxicity. However, side reactions generally occur in tandem with the target contaminants removal process, resulting in poor electron selectivity (ES) of nZVI, and subsequently restricting its commercial application. Major efforts to increase ES of nZVI have been made in recent years. This review's objective is to provide a progress report on the significant developments in nZVI's ES during the past decade. Firstly, the definition of ES and its quantification approaches were documented, and the intrinsic (i.e. particle size, crystallinity, and surface area) and extrinsic factors (i.e. solutions pH, target contaminant concentration, and presence of co-contaminants) affecting the ES of nZVI were reported. The latest techniques for increasing ES were summarized in detail, with reference made to sulfidation, magnetization, carbon loading and other features. Then the mechanisms of those strategies for ES enhancement were described. Finally, some constructive suggestions on future research directions concerning nZVI's ES in the future were proposed.
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Affiliation(s)
- Long Zhou
- School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China
| | - Zheng Li
- School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China
| | - Yunqiang Yi
- School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China.
| | - Eric Pokeung Tsang
- Dept. Sci. & Environment Studies, The Education University of Hong Kong, 00852 Hong Kong, China
| | - Zhanqiang Fang
- School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China.
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32
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Yang S, Liu A, Liu J, Liu Z, Zhang W. Advance of Sulfidated Nanoscale Zero-Valent Iron: Synthesis, Properties and Environmental Application. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22080345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Niu Q, Liu M, Fang L, Yu Y, Cheng L, You T. Highly dispersed and stable nano zero-valent iron doped electrospun carbon nanofiber composite for aqueous hexavalent chromium removal. RSC Adv 2022; 12:8178-8187. [PMID: 35424764 PMCID: PMC8982355 DOI: 10.1039/d2ra00193d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/08/2022] [Indexed: 11/21/2022] Open
Abstract
In this work, a nZVI doped electrospun carbon nanofiber (nZVI-CNF) composite was prepared and applied for aqueous hexavalent chromium (Cr(vi)) removal. Firstly, FeCl3/PAN nanofibers were prepared by a simple electrospinning method; Then, nZVI-CNFs were obtained by carbonization of FeCl3/PAN nanofibers at 800 °C. The surface morphology and internal structure of nZVI-CNFs were characterized by SEM and TEM, showing that the uniformly dispersed nZVI particles were well integrated into the carbon layer structure. The Cr(vi) removal efficiency of nZVI-CNFs was 91.5% with a Cr(vi) concentration of 10 mg L−1 and the mechanism was further studied by XRD and XPS. Meanwhile, the nZVI-CNFs exhibited good stability over a wide range of pH values from 4–8 and a long time placement stability. Furthermore, nZVI-CNFs can be used as a filter membrane for continuous treatment of wastewater, suggesting great potential for practical application. Improving the dispersion and stability of nano zero-valent iron (nZVI) is very important for its practical application.![]()
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Affiliation(s)
- Qijian Niu
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Meili Liu
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Longyang Fang
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Yangyang Yu
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Liang Cheng
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
- School of Civil and Mechanical Engineering, Curtin University, Perth, 6102, Australia
| | - Tianyan You
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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Gong L, Qiu X, Cheng D, Hu Y, Zhang Z, Yuan Q, Yang D, Liu C, Liang L, He F. Coincorporation of N and S into Zero-Valent Iron to Enhance TCE Dechlorination: Kinetics, Electron Efficiency, and Dechlorination Capacity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16088-16098. [PMID: 34787396 DOI: 10.1021/acs.est.1c03784] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sulfidated zero-valent iron (S-ZVI) enhances the degradation of chlorinated hydrocarbon (CHC) in contaminated groundwater. Despite numerous studies of S-ZVI, a versatile strategy to improve its dechlorination kinetics, electron efficiency (εe), and dechlorination capacity is still needed. Here, we used heteroatom incorporation of N(C) and S by ball-milling of microscale ZVI with melamine and sulfur via nitridation and sulfidation to synthesize S-N(C)-mZVIbm particles that contain reactive Fe-NX(C) and FeS species. Sulfidation and nitridation synergistically increased the trichloroethene (TCE) dechlorination rate, with reaction constants kSA of 2.98 × 10-2 L·h-1·m-2 by S-N(C)-mZVIbm, compared to 1.77 × 10-3 and 8.15 × 10-5 L·h-1·m-2 by S-mZVIbm and N(C)-mZVIbm, respectively. Data show that sulfidation suppressed the reductive dissociation of N(C) from S-N(C)-mZVIbm, which stabilized the reactive Fe-NX(C) and reserved electrons for TCE dechlorination. In addition to lowering H2 production, S-N(C)-mZVIbm dechlorinated TCE to less reduced products (e.g., acetylene), contributing to the material's higher εe and dechlorination capacity. This synergistic effect on TCE degradation can be extended to other recalcitrant CHCs (e.g., chloroform) in both deionized and groundwater. This multiheteroatom incorporation approach to optimize ZVI for groundwater remediation provides a basis for further advances in reactive material synthesis.
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Affiliation(s)
- Li Gong
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaojiang Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dong Cheng
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yao Hu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zaizhi Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qunsen Yuan
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dezhi Yang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chengshuai Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Liyuan Liang
- Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
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Zhu X, Le TT, Du J, Xu T, Cui Y, Ling H, Kim SH. Novel core-shell sulfidated nano-Fe(0) particles for chromate sequestration: Promoted electron transfer and Fe(II) production. CHEMOSPHERE 2021; 284:131379. [PMID: 34225108 DOI: 10.1016/j.chemosphere.2021.131379] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 06/23/2021] [Accepted: 06/27/2021] [Indexed: 06/13/2023]
Abstract
Sulfidated nanoscale valent iron in form of FeS/Fe (0) shell-core nanoparticle has the aptitude to be a promising remediation material toward reductive removal of metal oxyanions. However, disrupted contact between Fe (0) core and FeS shell by thick iron oxides limited its reactivity improvement, and its mechanism of electron transfer remains unveiled. In this study, a novel sulfidated nZVI core-shell particles (FeS/Fe (0)) was fabricated via a modified post sulfidation approach to achieve a more uniform coverage of FeS for aqueous Cr(VI) sequestration. SEM and STEM tests confirmed the formation of the core-shell FeS/Fe (0) structure with a more solid interaction between FeS layer and Fe (0) core. The highest Cr(VI) removal rate was offered at optimal S/Fe molar ratio of 1/25 that the most chelated Fe2+ was also observed. The improved performance was due to that FeS shell with greater electronegativity could significantly accelerate the corrosion of Fe (0), facilitate the electron transfer form Fe (0) core to FeS shell according to the electrochemical tests. Moreover, FeS shell provided a protective layer for Fe (0) core so as to alleviate its anoxic passivation in water that FeS/Fe (0) had a better longevity for Cr(VI) removal than nFe (0). Characterizations of STEM and XPS revealed that Cr(VI) was reduced to Cr(III) and evenly coprecipitated with surface Fe(II)/Fe(III).
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Affiliation(s)
- Xiaowei Zhu
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Department of Environmental Science and Engineering, Hubei Water Systematic Pollution Control and Remediation Technology Center, China University of Geosciences, Wuhan, 430074, PR China
| | - Thao Thi Le
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Division of Nano and Information Technology, KIST School, University of Science and Technology, Daejeon, 34113, Republic of Korea
| | - Jiangkun Du
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Department of Environmental Science and Engineering, Hubei Water Systematic Pollution Control and Remediation Technology Center, China University of Geosciences, Wuhan, 430074, PR China.
| | - Tiantian Xu
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Department of Environmental Science and Engineering, Hubei Water Systematic Pollution Control and Remediation Technology Center, China University of Geosciences, Wuhan, 430074, PR China
| | - Yayun Cui
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Department of Environmental Science and Engineering, Hubei Water Systematic Pollution Control and Remediation Technology Center, China University of Geosciences, Wuhan, 430074, PR China
| | - Haibo Ling
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, PR China; Hubei Academy of Environmental Sciences, Wuhan, 430072, PR China; Department of Environmental Science and Engineering, Hubei Water Systematic Pollution Control and Remediation Technology Center, China University of Geosciences, Wuhan, 430074, PR China
| | - Sang Hoon Kim
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Division of Nano and Information Technology, KIST School, University of Science and Technology, Daejeon, 34113, Republic of Korea.
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Remediation of Cr(VI)/Cd(ІІ)-Contaminated Groundwater with Simulated Permeable Reaction Barriers Filled with Composite of Sodium Dodecyl Benzene Sulfonate-Modified Maifanite and Anhydride-Modified Fe@SiO2@Polyethyleneimine: Environmental Factors and Effectiveness. ADSORPT SCI TECHNOL 2021. [DOI: 10.1155/2021/4998706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A composite material of sodium dodecyl benzene sulfonate- (SDBS-) modified maifanite and anhydride-modified Fe@SiO2@PEI (PEI) was used as an adsorbent for the removal of hexavalent chromium (Cr(VI)) and bivalent cadmium (Cd(II)) from groundwater by using column experiments and simulated PRB test. In this study, the optimum proportion of SDBS-modified maifanite and anhydride-modified Fe@SiO2@PEI was 5 : 1. In the column experiments, it was found that the penetration time increased with the increase of the initial concentrations (30, 60, and 90 mg/L) and the decrease of the flow rates (5.45, 10.9, and 16.35 mL/min) at an influent pH of
. It was also obtained that the removal rates of Cr(VI) and Cd(ІІ) reached 99.93% and 99.79% at an initial Cr(VI) and Cd(ІІ) concentration of 30 mg/L with the flow rate of 10.9 mL/min, respectively, at 6 h. Furthermore, excellent removal effectiveness of Cr(VI) and Cd(ІІ) (85.94% and 83.45%, respectively) was still achieved in simulated PRB test at a flow rate of 5.45 mL/min with the heavy metal solution concentration of
mg/L (Cr(VI) and Cd(II) concentration were, respectively,
5 mg/L); and the adsorbent had not completely failed by the end of the trial. Yoon-Nelson model was successfully applied to predict the breakthrough curves for the assessment of composite material heavy metal removal performance and was in good agreement with the experimental data of the heavy metal removal efficiency. The strong removal ability of the adsorbent could be attributed to the fact that maifanite with a large diameter can provide support and increase the permeability coefficient and porosity and that zero-valent iron (ZVI) can convert Cr(VI) to Cr(III) and improve the adsorption capacity of maifanite. The obtained results suggested that the novel PRB fillers have great significance for preventing and controlling Cr(VI)/Cd(ІІ)-contaminated groundwater.
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Effective removal of levofloxacin drug and Cr(VI) from water by a composed nanobiosorbent of vanadium pentoxide@chitosan@MOFs. Int J Biol Macromol 2021; 188:879-891. [PMID: 34403678 DOI: 10.1016/j.ijbiomac.2021.08.092] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/15/2021] [Accepted: 08/10/2021] [Indexed: 01/19/2023]
Abstract
Wastewaters is generally polluted with various inorganic and organic contaminants which require effective multipurpose purification technology. In this respect, a novel V2O5@Ch/Cu-TMA nanobiosorbent was constructed via encapsulation of nanoscale metal organic frameworks (Cu-TMA) into vanadium pentoxide-imbedded-chitosan matrix to comprehensively investigate its efficiency in removal of levofloxacin drug (LEVO) (e.g., organic pollutant) and chromium (VI) (e.g., inorganic pollutant) from water. Both LEVO drug and Cr(VI) adsorptions were correlated to pseudo-second order (R2 = 1) and Langmuir isotherm (R2 = 0.9924 for LEVO and R2 = 0.9815 for Cr(VI)). Adsorption of Cr(VI) was confirmed to be spontaneous and endothermic reactions, while LEVO was found to proceed via spontaneous and exothermic reactions based on the thermodynamic parameters. The emerged V2O5@Ch/Cu-TMA is regarded as an excellent nanobiosorbent for removal of inorganic contaminant as Cr(VI) from all natural water samples (tap, sea and wastewater) with percentages range 92.43%-96.95% and organic contaminant as LEVO drug from tap and wastewater (91.99%-97.20%).
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Qu M, Chen H, Wang Y, Wang X, Tong X, Li S, Xu H. Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal. CHEMOSPHERE 2021; 281:130820. [PMID: 34015648 DOI: 10.1016/j.chemosphere.2021.130820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/14/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
The reactivity of zero-valent iron (ZVI) for the Cr(VI) removal in groundwater is mainly limited by the formation of a passivation layer during its application in permeable reactive barrier (PRB). A kind of sulfidated copper-iron bimetal (S-ZVICu) with high reactivity for Cr(VI) removal was prepared by depositing FeSx onto copper modified ZVI via a one-pot method. The surface characteristic, reactivity and Cr(VI) removal performance of S-ZVICu were investigated. It was found that S-ZVICu had a Cr(VI) removal capacity as high as 67.5 mg/g and little risk of secondary contaminant of Cu(II). The optimal Cu/Fe mass ratio and S/Fe molar ratio were 0.0125 and 0.084, respectively. The S-ZVICu exhibited great superiority of Cr(VI) removal compared with ZVI, sulfidated ZVI (SZVI) and coper-iron bimetal (ZVICu). Mineralogy and morphology analysis showed that S-ZVICu had a hierarchical structure of Fe0/Cu0/FeSx, which could effectively reduce the risk of secondary contaminant of copper ions. The mechanism analysis suggested that the copper and FeSx successively plated on the surface of ZVI played a dual role in promoting the corrosion of zero-valent iron, and was facilitated to electron transfer between Fe0, Cu0, FeSx and Cr(VI). In addition, the loose FeSx layer had a positive effect on alleviating the oxidation of ZVI in air, which was helpful in maintaining the reactivity of S-ZVICu in the air. S-ZVICu is an environmentally friendly material for sustainable and effective removal of Cr(VI) in groundwater.
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Affiliation(s)
- Min Qu
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
| | - Huixia Chen
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Yuan Wang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xingrun Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xuejiao Tong
- Yuhuan Environmental Technology Co. LTD., Shijiazhuang, 050091, Hebei Province, China
| | - Shupeng Li
- Beijing Construction Engineering Group Environmental Remediation Co. Ltd., Beijing, 100015, China
| | - Hongbin Xu
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
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Wang X, Zhang Y, Wang Z, Xu C, Tratnyek PG. Advances in metal(loid) oxyanion removal by zerovalent iron: Kinetics, pathways, and mechanisms. CHEMOSPHERE 2021; 280:130766. [PMID: 34162087 DOI: 10.1016/j.chemosphere.2021.130766] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 06/13/2023]
Abstract
Metal(loid) oxyanions in groundwater, surface water, and wastewater can have harmful effects on human or ecological health due to their high toxicity, mobility, and lack of degradation. In recent years, the removal of metal(loid) oxyanions using zerovalent iron (ZVI) has been the subject of many studies, but the full scope of this literature has not been systematically reviewed. The main elements that form metal(loid) oxyanions under environmental conditions are Cr(VI), As(V and III), Sb(V and III), Tc(VII), Re(VII), Mo(VI), V(V), etc. The removal mechanisms of metal(loid) oxyanions by ZVI may involve redox reactions, adsorption, precipitation, and coprecipitation, usually with one of these mechanisms being the main reaction pathway and the other playing auxiliary roles. However, the removal mechanisms are coupled to the reactions involved in corrosion of Fe(0) and reaction conditions. The layer of iron oxyhydroxides that forms on ZVI during corrosion mediates the sequestration of metal(loid) oxyanions. This review summarizes most of the currently available data on mechanisms and performance (e.g., kinetics) of removal of the most widely studies metal(loid) oxyanion contaminants (Cr, As, Sb) by different types of ZVI typically used in wastewater treatment, as well as ZVI that has been sulfidated or combination with catalytic bimetals.
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Affiliation(s)
- Xiao Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Yue Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Zhiwei Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Chunhua Xu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
| | - Paul G Tratnyek
- OHSU-PSU School of Public Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239, USA.
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Xu C, Yang C, Liu X, He Y, Xing X, Zhao Y, Qian Z, Zheng J, Hao Z. Agar-stabilized sulfidated microscale zero-valent iron: Its stability and performance in chromate reduction. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:126019. [PMID: 34229378 DOI: 10.1016/j.jhazmat.2021.126019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 06/13/2023]
Abstract
Sulfidated microscale zero-valent iron (SmZVI) attracts much attention recently in remediation of contaminated groundwater, but whether polymer coating on SmZVI would impact on its reactivity and capacity is yet to be understood. In this work, SmZVI was prepared by milling mZVI with elemental sulfur, and its stability in agar solution was evaluated. The impact of polymer coating on SmZVI grains' capacity and reactivity for chromate reduction was then examined. Experimental results indicated that SmZVI having the best overall performance was attained by grinding mZVI with elemental sulfur at 0.05 S/Fe molar ratio for 10 h. SmZVI's stability can be substantially improved if dispersed in 2.0 g/L agar solution. Existence of agar films on the SmZVI grain (A-SmZVI) lowered the material's capacity for chromate reduction by 56%, and the associated reaction kinetics by 70.4%, as estimated by pseudo first-order reaction model using the early-stage experimental data. Analysis of XPS spectra of A-SmZVI post reaction with chromate indicated that multiple reductive species including Fe0, Fe(II), FeS, and S(-II) may have jointly participated in the redox reaction taking place on the A-SmZVI-water interface. Fitting of XPS data supported that S(-II) was oxidized to SO42-, S2O32-, and S0, in order of decreasing surface concentration.
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Affiliation(s)
- Congbin Xu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Chen Yang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Xiaodan Liu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Yali He
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Xing Xing
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Yurong Zhao
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Zhi Qian
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China
| | - Jianzhong Zheng
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, PR China.
| | - Zhengping Hao
- National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China
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Jiang Y, Yang S, Wang M, Xue Y, Liu J, Li Y, Zhao D. A novel ball-milled aluminum-carbon composite for enhanced adsorption and degradation of hexabromocyclododecane. CHEMOSPHERE 2021; 279:130520. [PMID: 33857650 DOI: 10.1016/j.chemosphere.2021.130520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/14/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Hexabromocyclododecane (HBCD) is one of the priority persistent organic pollutants (POPs), yet a cost-effective technology has been lacking for the removal and degradation of HBCD. Zero-valent aluminum (ZVAl) is an excellent electron donor. However, the inert and hydrophilic surface oxide layer impedes the release of the electrons from the core metallic Al, resulting in poor reactivity towards HBCD. In this research, a new type of modified mZVAl particles (AC@mZVAlbm/NaCl) were prepared through ball milling mZVAl in the presence of activated carbon (AC) and NaCl, and tested for adsorption and reductive degradation of HBCD in water. AC@mZVAlbm/NaCl was characterized with a metallic Al core with newly created reactive surface coated with a thin layer of crushed carbon nanoparticles. AC@mZVAlbm/NaCl was able to rapidly (within 1 h) adsorb HBCD (C0 = 2 mg L-1) and thus effectively enriched HBCD on the carbon surface of AC@mZVAlbm/NaCl. The pre-enriched HBCD was subsequently degraded by the electrons from the core Al, and ∼63.44% of the pre-sorbed HBCD was completely debrominated after 62 h of the contact. A notable time lag (∼12 h) from the onset of the adsorption to the debromination was observed, signifying the importance of the solid-phase mass transfer from the initially adsorbed AC particles to the reactive Al-AC interface. Overall, AC@mZVAlbm/NaCl synergizes the adsorptive properties of AC and the high reactivity of metallic Al, and enables a novel two-step adsorption and reductive degradation process for treating HBCD or likely other POPs.
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Affiliation(s)
- Yuting Jiang
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Shiying Yang
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), Qingdao, 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
| | - Manqian Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yichao Xue
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Junqin Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yang Li
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Dongye Zhao
- Department of Civil and Environmental Engineering, 238 Harbert Engineering Center, Auburn University, Auburn, AL, 36849, USA.
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Garcia AN, Zhang Y, Ghoshal S, He F, O'Carroll DM. Recent Advances in Sulfidated Zerovalent Iron for Contaminant Transformation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8464-8483. [PMID: 34170112 DOI: 10.1021/acs.est.1c01251] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
2021 marks 10 years since controlled abiotic synthesis of sulfidated nanoscale zerovalent iron (S-nZVI) for use in site remediation and water treatment emerged as an area of active research. It was then expanded to sulfidated microscale ZVI (S-mZVI) and together with S-nZVI, they are collectively referred to as S-(n)ZVI. Heightened interest in S-(n)ZVI stemmed from its significantly higher reactivity to chlorinated solvents and heavy metals. The extremely promising research outcomes during the initial period (2011-2017) led to renewed interest in (n)ZVI-based technologies for water treatment, with an explosion in new research in the last four years (2018-2021) that is building an understanding of the novel and complex role of iron sulfides in enhancing reactivity of (n)ZVI. Numerous studies have focused on exploring different S-(n)ZVI synthesis approaches, and its colloidal, surface, and reactivity (electrochemistry, contaminant selectivity, and corrosion) properties. This review provides a critical overview of the recent milestones in S-(n)ZVI technology development: (i) clear insights into the role of iron sulfides in contaminant transformation and long-term aging, (ii) impact of sulfidation methods and particle characteristics on reactivity, (iii) broader range of treatable contaminants, (iv) synthesis for complete decontamination, (v) ecotoxicity, and (vi) field implementation. In addition, this review discusses major knowledge gaps and future avenues for research opportunities.
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Affiliation(s)
- Ariel Nunez Garcia
- Department of Civil and Environmental Engineering, Western University, 1151 Richmond Rd., London, Ontario N6A 5B8, Canada
| | - Yanyan Zhang
- Department of Civil Engineering, McGill University, 817 Sherbrooke Street West, Montreal, Quebec H3A 0C3, Canada
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province China
| | - Subhasis Ghoshal
- Department of Civil Engineering, McGill University, 817 Sherbrooke Street West, Montreal, Quebec H3A 0C3, Canada
| | - Feng He
- Institute of Environmental Chemistry and Pollution Control College of Environment, Zhejiang University of Technology 18 Chaowang Rd, Hangzhou, China 310014
| | - Denis M O'Carroll
- School of Civil and Environmental Engineering, Water Research Centre, University of New South Wales, Sydney New South Wales 2052, Australia
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Zou H, Zhao J, He F, Zhong Z, Huang J, Zheng Y, Zhang Y, Yang Y, Yu F, Bashir MA, Gao B. Ball milling biochar iron oxide composites for the removal of chromium (Cr(VI)) from water: Performance and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125252. [PMID: 33578092 DOI: 10.1016/j.jhazmat.2021.125252] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
As the first of its kind, a novel biochar/iron oxide composite (BM-Fe-HC) was successfully prepared by simply ball milling iron-laden biochar (Fe-HC). The performance and mechanisms of Cr(VI) removal by BM-Fe-HC were investigated. Ball milling effectively reduced particle size, increased specific surface area, more importantly, enhanced the distribution and increased the exposure of iron oxides on biochar surface. As a result, Cr(VI) removal by BM-Fe-HC showed fast kinetics and large adsorption capacity with the Langmuir maximum capacity of 48.1 mg/g, higher than that of other biochar/iron composites reported in the literature. Acidic pH promoted Cr(VI) removal while competition ions (Cl-, SO42- and PO43-) inhibited Cr(VI) removal by BM-Fe-HC. Comparison of pre- and post-adsorption samples revealed that iron oxides of the BM-Fe-HC played the dominant role in the adsorption and reduction of Cr(VI) during the removal. After adsorption, part of adsorbed Cr(VI) was reduced by Fe(II) and then stabilized by Fe(III) in the form of amorphous CrxFe1-x(OH)3 on the composite surface. All the results demonstrate that novel ball-milled biochar/iron oxide composites can be used as an effective adsorbent to remove Cr(VI) from water.
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Affiliation(s)
- Haowen Zou
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiawei Zhao
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Zhong Zhong
- Eco-Environmental Science & Research Institute of Zhejiang Province, Hangzhou 310007, China
| | - Jinsheng Huang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Yulin Zheng
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Yue Zhang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Yicheng Yang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Fang Yu
- School of Resource and Environmental Sciences, Wuhan University, Wuhan 430072, China
| | - M Asaad Bashir
- Department of Soil Science, Faculty of Agriculture & Environment, The Islamia University of Bahawalpur, Pakistan
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
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Zhao J, Su A, Tian P, Tang X, Collins RN, He F. Arsenic (III) removal by mechanochemically sulfidated microscale zero valent iron under anoxic and oxic conditions. WATER RESEARCH 2021; 198:117132. [PMID: 33878661 DOI: 10.1016/j.watres.2021.117132] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/25/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
The interaction of As(III) with micron-sized, mechanochemically sulfidated zero-valent iron (S-mZVIbm) has been studied under both anoxic and oxic conditions. The As(III) removal capacity varied with the increase of S/Fe molar ratio under anoxic conditions, while it continuously decreased under oxic conditions. A series of sequential extractions, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES) spectroscopy analyses were used to investigate As(III) removal mechanisms. In the absence of oxygen, As(III) was removed from solution primarily through the formation of As4S4 with less than half of the removal resulting from the adsorption of As(III)/As(V) and FeAsS precipitation. Under oxic conditions, adsorption onto iron (oxyhydr)oxides was the dominant mechanism of As(III) removal. Increasing sulfidation decreased particle Fe(0) content, which resulted in less production of iron (oxyhydr)oxides and therefore lower As(III) removal capacities. Column experiments showed that less than 2 wt% of S-mZVIbm in sand was able to rapidly reduce the As(III) concentration in a real groundwater from 300 to 10 µg/L, the Chinese drinking water standard, for up to 750 BV with an EBCT of 2.54 min. This study demonstrates that S-mZVIbm is an efficient and cost-effective material in treating As-contaminated water to ensure water safety.
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Affiliation(s)
- Jiawei Zhao
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - An Su
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ping Tian
- Zhejiang Zone-King Environmental Sci & Tech Co., Ltd, Hangzhou 310014, China
| | - Xianjin Tang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Richard N Collins
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
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45
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Yang Z, Zhang X, Jiang Z, Li Q, Huang P, Zheng C, Liao Q, Yang W. Reductive materials for remediation of hexavalent chromium contaminated soil - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145654. [PMID: 33582355 DOI: 10.1016/j.scitotenv.2021.145654] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/18/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Chemical reduction of Cr(VI) to Cr(III) by reductive materials is the most widely used technology for the remediation of Cr(VI)-contaminated soil due to its high efficiency, adaptability and low cost. This paper reviews chromium chemistry and the materials that can effectively reduce Cr(VI) to Cr(III) for the remediation of Cr(VI)-contaminated soil, namely iron-bearing reductants, sulfur-based compounds and organic amendments. Moreover, we discuss the corresponding mechanisms involved in the process of immobilization of Cr(VI) in polluted soil, and emphasize the relationship between the materials remediation performance and soil environmental conditions. Besides, perspectives on the potential future researches of novel materials design and technological development in the remediation of Cr(VI) contaminated soil are also put forward.
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Affiliation(s)
- Zhihui Yang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China
| | - Xiaoming Zhang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Zhi Jiang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Qi Li
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Peicheng Huang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Chujing Zheng
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China
| | - Qi Liao
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China
| | - Weichun Yang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China.
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Wang Q, Liao Z, Yao D, Yang Z, Wu Y, Tang C. Phosphorus immobilization in water and sediment using iron-based materials: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 767:144246. [PMID: 33434847 DOI: 10.1016/j.scitotenv.2020.144246] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/25/2020] [Accepted: 11/24/2020] [Indexed: 05/28/2023]
Abstract
As an essential element for life, phosphorus (P) is very important for organisms. However, excessive P in water and sediment can cause eutrophication, which poses a potential risk to drinking water safety and the sustainability of aquatic ecosystems. Therefore, effective phosphorus-control in water and sediment is the key strategy to control eutrophication. Iron-based materials exhibit high efficiency for P immobilization due to their strong affinity with P, low cost, easy availability, and environmentally friendliness. They are promising materials for controlling P in application. This work comprehensively summarizes the recent advances on P immobilization in water and sediment by different iron-based materials, including iron (hydr)oxides, iron salts, zero-valent iron and iron-loaded materials. This review is focused on the mechanism of the processes and how they are impacted by major influencing factors. The combination of iron-containing materials with other assisting materials is a good strategy to enhance P-fixation efficiency and selectivity. Finally, the current challenges and prospects of P-control technologies based on iron-containing materials are proposed. This review provides a systemic theoretical and experimental foundation for P-immobilization in water and sediment using iron-based materials.
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Affiliation(s)
- Qipeng Wang
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Zaiyi Liao
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China; Department of Architectural Science, Ryerson University, Toronto, Canada
| | - Dongxin Yao
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Zhengjian Yang
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Yonghong Wu
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China
| | - Cilai Tang
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China.
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Brumovský M, Oborná J, Lacina P, Hegedüs M, Sracek O, Kolařík J, Petr M, Kašlík J, Hofmann T, Filip J. Sulfidated nano-scale zerovalent iron is able to effectively reduce in situ hexavalent chromium in a contaminated aquifer. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124665. [PMID: 33301974 DOI: 10.1016/j.jhazmat.2020.124665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/04/2020] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
In a number of laboratory studies, sulfidated nanoscale zero-valent iron (S-nZVI) particles showed increased reactivity, reducing capacity, and electron selectivity for Cr(VI) removal from contaminated waters. In our study, core-shell S-nZVI particles were successfully injected into an aquifer contaminated with Cr(VI) at a former chrome plating facility. S-nZVI migrated towards monitoring wells, resulting in a rapid decrease in Cr(VI) and Crtot concentrations and a long-term decrease in groundwater redox potential observed even 35 m downstream the nearest injection well. Characterization of materials recovered from the injection and monitoring wells confirmed the presence of nZVI particles, together with iron corrosion products. Chromium was identified on the surface of the recovered iron particles as Cr(III), and its occurrence was linked to the formation of insoluble chromium-iron (oxyhydr)oxides such as CrxFe(1-x)(OH)3(s). Injected S-nZVI particles formed aggregates, which were slowly transformed into iron (oxyhydr)oxides and carbonate green rust. Elevated contents of Fe0 were detected even several months after injection, indicating good S-nZVI longevity. The sulfide shell was gradually disintegrated and/or dissolved. Geochemical modelling confirmed the overall stability of the resulting Cr(III) phase at field conditions. This study demonstrates the applicability of S-nZVI for the remediation of a Cr(VI)-contaminated aquifer.
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Affiliation(s)
- Miroslav Brumovský
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic; Department of Environmental Geosciences (EDGE), Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstr. 14, UZA II, 1090 Vienna, Austria.
| | - Jana Oborná
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Petr Lacina
- GEOtest, a.s., Šmahova 1244/112, 627 00 Brno, Czech Republic
| | - Michal Hegedüs
- GEOtest, a.s., Šmahova 1244/112, 627 00 Brno, Czech Republic; Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Ondra Sracek
- Department of Geology, Faculty of Science, Palacký University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Jan Kolařík
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Martin Petr
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Josef Kašlík
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Thilo Hofmann
- Department of Environmental Geosciences (EDGE), Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstr. 14, UZA II, 1090 Vienna, Austria
| | - Jan Filip
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.
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Gong L, Qi J, Lv N, Qiu X, Gu Y, Zhao J, He F. Mechanistic role of nitrate anion in TCE dechlorination by ball milled ZVI and sulfidated ZVI: Experimental investigation and theoretical analysis. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123844. [PMID: 33264925 DOI: 10.1016/j.jhazmat.2020.123844] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 06/12/2023]
Abstract
Mechanistic role of NO3- in trichloroethylene (TCE) dechlorination by ball milled, micro-scale sulfidated and unsulfidated ZVI (e.g., S-mZVIbm and mZVIbm) was explored through experiments and density functional theory (DFT) calculations. Sulfidation inhibited NO3- reduction by mZVIbm as S weakened its interaction with NO3-. mZVIbm reduced NO3- within 2 h. This just resulted in a short-term electron competition during the dechlorination process by mZVIbm and hardly affected its sluggish dechlorination kinetics (complete TCE dechlorination in 11 d). On the contrary, NO3- suppressed TCE dechlorination by S-mZVIbm. This was attributed to that inhibited NO3- reduction by S-mZVIbm (40 % reduction in 6 h) induced continuous electron competition with TCE during the time span of its dechlorination by S-mZVIbm. NO3- reduction was also observed to facilitate formation/crystallization of Fe3O4 on both ZVI particles, promoting dechlorination by mZVIbm after 4 d while not taking effect to the S-mZVIbm/TCE system, as its dechlorination time was too short for the surface of S-mZVIbm to transform. This observation has important implication on groundwater remediation by ZVI or sulfidated ZVI PRBs under a scenario of upgradient anthropogenic release of NO3-.
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Affiliation(s)
- Li Gong
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jianlong Qi
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Neng Lv
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaojiang Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yawei Gu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jiawei Zhao
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
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Cai S, Chen B, Qiu X, Li J, Tratnyek PG, He F. Sulfidation of Zero-Valent Iron by Direct Reaction with Elemental Sulfur in Water: Efficiencies, Mechanism, and Dechlorination of Trichloroethylene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:645-654. [PMID: 33302625 DOI: 10.1021/acs.est.0c05397] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Sulfidation can enhance both the reactivity and selectivity (i.e., electron efficiency, εe) of zero-valent iron (ZVI) in contaminant removal, which may make this technology cost-effective for a wider range of water treatment applications. However, current sulfidation methods involve either hazardous or unstable sulfidation agents (e.g., Na2S, Na2S2O3, and Na2S2O4) or energy-intensive preparations (e.g., mechanochemical sulfidation with elemental sulfur). In this study, we demonstrate that very efficient sulfidation of microscale ZVI (mZVI) can be achieved at all S/Fe molar ratios (∼100% sulfidation efficiency, εs) simply by direct reaction between elemental sulfur (S0) and ZVI in an aqueous suspension at ambient temperature. In comparison, the εs values obtained using Na2S, Na2S2O3, or Na2S2O4 as the sulfidation agents were only ∼23, ∼75, and ∼38%, respectively. The sulfidated mZVI produced using the new method reacts with trichloroethylene (TCE) with very high rates and electron efficiencies: rate constants and electron efficiencies were 800- and 79-fold higher than those of the unsulfidated mZVI. The enhanced performance of this material, together with the operational advantages of S0 for sulfidation (including safety, stability, and cost), may make it a desirable product for full-scale engineering applications.
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Affiliation(s)
- Shichao Cai
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Bo Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaojiang Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiamei Li
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Paul G Tratnyek
- OHSU-PSU School of Public Health Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, United States
| | - Feng He
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
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Wang S, Zhong D, Xu Y, Zhong N. Polyethylene glycol-stabilized bimetallic nickel–zero valent iron nanoparticles for efficient removal of Cr( vi). NEW J CHEM 2021. [DOI: 10.1039/d1nj03122h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In order to solve the agglomeration of nanoscale zero-valent iron (nZVI) and improve its performance in pollutant treatment, polyethylene glycol-stabilized nickel modified nZVI (Ni/Fe–PEG) was synthesized by a liquid-phase reduction method and used to treat Cr(vi) solution for the first time.
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Affiliation(s)
- Shuang Wang
- School of Chemical Engineering
- Chongqing University of Technology
- Chongqing 400054
- China
| | - Dengjie Zhong
- School of Chemical Engineering
- Chongqing University of Technology
- Chongqing 400054
- China
| | - Yunlan Xu
- School of Chemical Engineering
- Chongqing University of Technology
- Chongqing 400054
- China
| | - Nianbing Zhong
- School of Electrical and Electronic Engineering
- Chongqing University of Technology
- Chongqing 400054
- China
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