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Xu Y, Chen J. Activity and recyclability enhancement of pH-dependent Fe 0@BC-mediated heterogeneous sodium percarbonate (SPC)-reducing agents (RA) system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120596. [PMID: 38520858 DOI: 10.1016/j.jenvman.2024.120596] [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: 11/29/2023] [Revised: 02/04/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
Dyes pose great threats to the aquatic environment and human health. Fe0-based Fenton-like systems have been widely employed for the degradation of organic dyes. However, the regulation of degradability and recyclability was still unclear. In this study, Rhodamine B (RhB) was served as the model pollutant, hydroxylamine hydrochloride was selected as the RA, the natural photocatalysis system demonstrated stable operation. RA, as performance enhancement agent, was firstly reported in micro/nano-Zero-Valent Iron@Biochar (m/nZVI@BC) based SPC-RA system. Carrier size-fractionated m/nZVI@BC was fabricated by one-step carbothermal method. As a result, RA synergistically interacted with SPC, and the reaction time reduced from 15 min to 4 min. In the 0.010 g m/nZVI@BC-mediated SPC-RA system, over 95% of RhB (100 mg·L-1, 1041.667 mg·g-1) was successfully degraded. The maximum degradation ability could still exceed 1g·g-1 via 5 times repeated applications. Meanwhile, the loss of degradability, caused by halving SPC concentration could be compensated by RA dosage measurement. The entire degradation process was predominantly dominated by free radicals (•OH> 1O2> •O2-> •CO3-). Reactive oxidizing species (ROSs) were primarily excited by α-Fe0, Fe3C and N sites of biochar (BC). Light and BC carrier dedicated slight influence. These discoveries shed a light on the activity and recyclability regulation of catalytic material, aligning with the principles of green chemistry and cleaner production. This study demonstrates a novel approach to efficient management of solid waste disposal, reuse of waste biomass, advanced treatment of dye-containing wastewater, pollution control in aquatic environments.
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Affiliation(s)
- Yan Xu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China
| | - Jiawei Chen
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China.
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2
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Dai G, Li X, Fu H, Wang F, Cui Z, Zhao R, Wang L. A novel oxalated zero-valent iron nanoparticle for Pb(II) removal from aqueous solution: Performance and synergistic mechanisms. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhu J, Zhang L, Liu J, Zhong S, Gao P, Shen J. Trichloroethylene remediation using zero-valent iron with kaolin clay, activated carbon and bacteria. WATER RESEARCH 2022; 226:119186. [PMID: 36244142 DOI: 10.1016/j.watres.2022.119186] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/22/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Nanoscale particles of zero-valent iron were used to form a permeable reactive barrier whose performance in dechlorinating a solution of trichloroethylene was compared with that of a barrier formed from limestone. The iron was combined with kaolin by calcination. The test liquid contained sewage sludge, and also added NH4Cl and KH2PO4. The average removal rates of trichloroethylene and phosphorus over 365 days both exceeded 94%. Chemical oxygen demand was reduced by 92% and ammonium nitrogen by 43.6%. All were significantly greater than the removals with the limestone barrier. The ceramsite barrier retained 85% of its effectiveness even after 365 days of use. Dechloromonas sp. was the main dechlorinating bacterium, but its removal ability is limited. The removal of trichloroethylene in such a barrier mainly depends on reduction by the zero-valent iron and biodegradation. The results show that the prepared ceramsite is stable and effective in removing trichloroethylene from water. It is a promising in-situ remediation material for groundwater.
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Affiliation(s)
- Jiayan Zhu
- School of Life and Environment Sciences, Guilin University of Electronic Technology, Guilin 541004, China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China
| | - Lishan Zhang
- School of Life and Environment Sciences, Guilin University of Electronic Technology, Guilin 541004, China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China.
| | - Junyong Liu
- School of Life and Environment Sciences, Guilin University of Electronic Technology, Guilin 541004, China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China
| | - Shan Zhong
- School of Life and Environment Sciences, Guilin University of Electronic Technology, Guilin 541004, China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China
| | - Pin Gao
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Jinyou Shen
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing, Jiangsu 210094, China
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Xie Y, Lu G, Tao X, Wen Z, Dang Z. A collaborative strategy for elevated reduction and immobilization of Cr(VI) using nano zero valent iron assisted by schwertmannite: Removal performance and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126952. [PMID: 34449341 DOI: 10.1016/j.jhazmat.2021.126952] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 08/08/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
A novel collaborative strategy for enhanced removal of Cr(VI) using nano zero valent iron (nZVI) assisted by schwertmannite (Sch) with two synthesis methods was designed. Batch experiments demonstrated that nZVI/Sch-AP (synthesized by abiotic precipitation of Fe3+ species) exhibited excellent removal performance for Cr(VI) than nZVI/Sch-CO (synthesized by chemical oxidation of Fe2+ species). The results indicated that the removal efficiencies of Cr(VI) by nZVI/Sch-AP and nZVI/Sch-CO were highly pH-dependent and achieved to be 99.99% and 98.01% under the optimal conditions of 10 mg L-1 Cr(VI) concentration, a pH of 6.3 and a Fe(0)/Cr(VI) molar ratio of 12. But nZVI/Sch-AP emerged greater k of 0.1097 min-1 than that of nZVI/Sch-CO (0.0485 min-1). Humic acid exhibited promotion effect on the Cr(VI) removal in low concentration of 1 mg L-1. Results of XRD and XPS demonstrated that α-FeOOH was the dominant products in both incubations of nZVI/Sch-AP and nZVI/Sch-CO, accompanied with FeCr2O4 and CrFe mixed (oxy)hydroxides, and γ-FeOOH was found alone in the incubations of nZVI/Sch-CO. We proposed a consecutive and simultaneous process involving surface absorption-reduction and co-precipitation/immobilization for the removal. This study provides new insights into the elimination of Cr(VI) from wastewater by nZVI/Sch, especially in acid mine drainage.
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Affiliation(s)
- Yingying Xie
- School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Guining Lu
- The Ministry of Education Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
| | - Xueqin Tao
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Zhen Wen
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhi Dang
- The Ministry of Education Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangzhou 510006, 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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Zhang L, Cao F, Sun J, Sun Y. The synergistic effect of attapulgite in the highly enhanced photoreduction of Cr(VI) by oxalic acid in aqueous solution. ENVIRONMENTAL RESEARCH 2021; 197:111070. [PMID: 33794174 DOI: 10.1016/j.envres.2021.111070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/08/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
Attapulgite (ATP), a widely existed clay in nature, was firstly and successfully applied to enhance the photoreduction of highly toxic Cr(VI) by oxalic acid (Ox). In ATP + Ox + UV system, batch effects (Ox concentration, initial Cr(VI) concentration, ATP dosage, and reusability of ATP) were investigated. By studying the impact of the initial pH in the solution, the change of pH and Fe species concentration as well as Ox concentration during the reaction, the free radical scavenging test, and the role of ATP, the mechanism of Cr(VI) removal by ATP + Ox + UV system was revealed. The methyl orange (MO) removal of ATP + Ox + UV system was also inspected. The results indicated that ATP showed the obvious enhancement in efficient photoreduction of Cr(VI) by Ox in water. The Fe and Si components in ATP played an important role in Cr(VI) removal by ATP + Ox + UV system: most of Cr(VI) was reduced by Fe(II) and CO2•‒ produced by the Fe(III)-Ox complex from the dissolved Fe component in ATP under UV irradiation. Some of Cr(VI) was reduced by e- and CO2•‒ from the oxidation of Ox by h+ generated by the photocatalyzed SiO2 in ATP. Furthermore, ATP + Ox + UV system also showed excellent MO removal performance, indicating the great potential in practical applications.
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Affiliation(s)
- Ling Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
| | - Fengming Cao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Jie Sun
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Yanqing Sun
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
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Yuan G, Li F, Li K, Liu J, Li J, Zhang S, Jia Q, Zhang H. Research Progress on Photocatalytic Reduction of Cr(VI) in Polluted Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200317] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gaoqian Yuan
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Faliang Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
- Jiangxi Engineering Research Center of Industrial Ceramics, Pingxiang 337022, P. R. China
| | - Kezhuo Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Jie Liu
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Junyi Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
| | - Shaowei Zhang
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
| | - Quanli Jia
- Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, 75 Daxue Road, Zhengzhou 450052, P. R. China
| | - Haijun Zhang
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
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Niu W, Sun J, Zhang L, Cao F. The enhanced removal of highly toxic Cr(VI) by the synergy of uniform fiber ball loaded with Fe(OH) 3 and oxalate acid. CHEMOSPHERE 2021; 262:127806. [PMID: 32750591 DOI: 10.1016/j.chemosphere.2020.127806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
In the view of green and efficient removal of chromium pollution, uniform fiber ball loaded with Fe(OH)3 (UFB-Fe(OH)3), was firstly synthesized and successfully used in the photoreduction of Cr(VI) by oxalate acid (Ox). The Cr(VI) removal in UFB-Fe(OH)3+Ox + UV system was examined by the effect of concentration of Ox, initial Cr(VI) concentration, dosage of UFB-Fe(OH)3 and the reusability of UFB-Fe(OH)3. By studying the impact of the initial pH in the solution, the relationship between the change in pH during the reaction and the removal efficiency of Cr(VI), the effect of coexisting ion (NO3-), and the free radicals quenching tests, the Cr(VI) removal mechanism in UFB-Fe(OH)3+Ox + UV system was further deduced. The results showed that UFB-Fe(OH)3 could greatly enhance the photoreduction of Cr(VI) by Ox, 1.5 mM Cr(VI) was completely removed in 6 min by UFB-Fe(OH)3+Ox + UV system. UFB-Fe(OH)3 had the feasibility of multiple use, it still exhibited the excellent enhancement in Cr(VI) removal by Ox after six cycles of use. The Cr(VI) photoreduction mechanism was consist of three part: i) Ox generate a part of CO2·- under the ultraviolet (UV) to reduce Cr(VI); ii) the Fe(III) dissolved by UFB-Fe(OH)3 formed FeOH2+ in the solution, and then generated very little Fe(II) under UV to remove Cr(VI); iii) the synergistic effect of UFB-Fe(OH)3 and Ox rapidly generated a large number of CO2·- and Fe(II) under UV excitation to reduce Cr(VI).
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Affiliation(s)
- Weiya Niu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, PR China
| | - Jie Sun
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, PR China
| | - Ling Zhang
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, PR China.
| | - Fengming Cao
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, PR China
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Njoya O, Zhao S, Qu Y, Shen J, Wang B, Shi H, Chen Z. Performance and potential mechanism of Cr(VI) reduction and subsequent Cr(III) precipitation using sodium borohydride driven by oxalate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 275:111165. [PMID: 32854051 DOI: 10.1016/j.jenvman.2020.111165] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/25/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
The method of treating high concentrations of Cr(VI) alone by NaBH4 has proved feasible, but the effects of the coexistence of Cr(VI) and organic compounds have not been evaluated. The objective of this study was to explore the potential mechanism by which oxalate affects the reduction of high concentrations of Cr(VI) treated by sodium borohydride (NaBH4) and the subsequent precipitation of Cr(III). The results show that Cr(VI) reduction could be gradually promoted by oxalate (1.0-10 mM). Compared with the control solution, the reduction of Cr(VI) in a 10 mM oxalate solution could be increased from 56.6% to 99.1%. Particularly, the promotion of Cr(VI) reduction attributed to the enhancement of OH- production from NaBH4 hydrolysis due to the increasing concentration of C2O42- species, forming conjugated acid-base pairs in the form HC2O4--C2O42-, which provided an effective buffer. In 0.10-0.40 mM oxalate-Cr(VI)-NaBH4 systems, the resulting Cr(III) could precipitate at different levels within 20 h, and showed settlement rates in the range of 8.8% and 95.8%, but no precipitate was found in 1.0-10 mM oxalate-Cr-NaBH4 systems. This is related to whether there was a sufficient oxalate dosage, which could be complexed with Cr (III) at a molar ratio of 1:1. The precipitates were analysed by means of electron spin resonance (ESR), atomic force microscopy (AFM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), indicating that Cr (III) could support oxalate coprecipitation. The results of the present study reveal the influence of oxalate on Cr(VI) reduction and subsequent Cr (III) precipitation, which are of great significance to the application of NaBH4 in the treatment of industrial wastewater containing Cr(VI)-oxalate.
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Affiliation(s)
- Ousmanou Njoya
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Shengxin Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
| | - Yanfeng Qu
- School of Public Health, Dali University, Dali, 671003, China
| | - Jimin Shen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Binyuan Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Han Shi
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Zhonglin Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
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