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Fang Y, Li F, Chao J, Tang Y, Coulon F, Krasucka P, Oleszczuk P, Hu Q, Yang XJ. Highly efficient capture of mercury from complex water matrices by AlZn alloy reduction-amalgamation and in situ layered double hydroxide. ENVIRONMENTAL TECHNOLOGY 2024; 45:2660-2672. [PMID: 36779296 DOI: 10.1080/09593330.2023.2180437] [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: 08/21/2022] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Mercury pollution is a critical, worldwide problem and the efficient, cost-effective removal of mercury from complex, contaminated water matrices in a wide pH range from strongly acidic to alkaline has been a challenge. Here, AlZn and AlFe alloys are investigated and a new process of synergistic reduction-amalgamation and in situ layered double hydroxide (SRA-iLDH) for highly efficient capture of aqueous Hg(II) is developed using AlZn alloys. The parameters include the pH values of 1-12, the Hg(II) concentrations of 10-1000 mg L-1, and the alloy's Zn concentrations of 20%, 50% and 70% and Fe concentrations of 10%, 20% and 50%. The initial rate of Hg(II) uptake by AlZn alloys decreases with increasing Zn concentration while the overall rate is not affected. Specifically, AlZn50 alloy removes >99.5% Hg(II) from 10 mg L-1 solutions at pH 1-12 in 5 min at a rate constant of 0.055 g mg-1 min-1 and achieves a capacity of 5000 mg g-1, being the highest value reported so far. The super-performance of AlZn alloy is attributed to multiple functions of chemical reduction, dual amalgamation, in situ LDH's surface complexation and adsorption, isomorphous substitution and intercalation. This study provides a simple and highly efficient approach for removing Hg(II) from complex water matrices.
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Affiliation(s)
- Yetian Fang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Fangyuan Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Jingbo Chao
- National Institute of Metrology, Beijing, People's Republic of China
| | - Yang Tang
- National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, UK
| | - Patrycja Krasucka
- Faculty of Chemistry, Department of Radiochemistry and Environmental Chemistry, Maria Curie-Sklodowska University, Lublin, Poland
| | - Patryk Oleszczuk
- Faculty of Chemistry, Department of Radiochemistry and Environmental Chemistry, Maria Curie-Sklodowska University, Lublin, Poland
| | - Qing Hu
- Southern University of Science and Technology, Shenzhen, People's Republic of China
- Beijing Huanding Environmental Big Data Institute, Beijing, People's Republic of China
| | - Xiao Jin Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, People's Republic of China
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Zhang J, Song Y, Chao J, Huang H, Liu D, Coulon F, Yang XJ. Rapid and effective removal of copper, nitrate and trichloromethane from aqueous media by aluminium alloys. Heliyon 2024; 10:e23422. [PMID: 38169809 PMCID: PMC10758792 DOI: 10.1016/j.heliyon.2023.e23422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 11/28/2023] [Accepted: 12/04/2023] [Indexed: 01/05/2024] Open
Abstract
Zero-valent iron (ZVI) has been extensively studied for its efficacy in removing heavy metals, nitrate, and chlorinated organic compounds from contaminated water. However, its limited effectiveness due to rapid passivation and poor selectivity is prompting for alternative solutions, such as the use of aluminium alloys. In this study, the efficacy of five distinct aluminium alloys, namely Al-Mg, Al-Fe, Al-Cu, and Al-Ni, each comprising 50 % Al by mass at a concentration of 10 g/L, was assessed using copper, nitrate and trichloromethane (TCM) as model contaminants. Results show that chemical pollutants reacted immediately with Al-Mg. On the contrary, the remaining three alloys exhibited a delay of 24 h before demonstrating significant reactivity. Remarkably, Al-Mg alloy reduced nitrate exclusively to ammonium, indicating minimal preference for nitrate reduction to N2. In contrast, the Al-Cu, Al-Ni, and Al-Fe alloys exhibited N2 selectivity of 3 %, 5 %, and 19 %, respectively. The removal efficiency of copper, nitrate and TCM reached 99 % within 24 h, 95 % within 48h and 48 % within 48h, respectively. Noteworthy findings included the correlation between Fe concentration within the Al-Fe alloy and an increased N2 selectivity from 9.3 % to 24.1 %. This resulted in an increase of Fe concentration from 10 % to 58 % albeit with a concurrent reduction in reactivity. Cu2+ removal by Al-Fe alloy occurred via direct electron transfer, while the removal of nitrate and TCM was facilitated by atomic hydrogen generated by the alloy's hydrolysis. Intriguingly, nitrate and TCM suppressed Cu2+ reduction, whereas Cu2+ improved nitrate reduction and TCM degradation. These findings demonstrate the great potential of Al-Mg and Al-Fe alloys as highly efficient agents for water remediation.
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Affiliation(s)
- Jingqi Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Research & Development Centre, China State Science Dingshi Environmental Engineering Co., Ltd, Beijing, 100102, China
| | - Ying Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jingbo Chao
- Chemical Metrology and Analytical Science Division, National Institute of Metrology, Beijing, 100029, China
| | - Hai Huang
- Research & Development Centre, China State Science Dingshi Environmental Engineering Co., Ltd, Beijing, 100102, China
| | - Dazhi Liu
- Tangshan Weihao Magnesium Powder Co., Ltd, Qianan, Hebei, 064406, China
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Xiao Jin Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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Yin X, Hua H, Dyer J, Landis R, Fennell D, Axe L. Degradation of chlorinated solvents with reactive iron minerals in subsurface sediments from redox transition zones. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130470. [PMID: 36493644 DOI: 10.1016/j.jhazmat.2022.130470] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 11/08/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Reactive iron (Fe) mineral coatings found in subsurface reduction-oxidation transition zones (RTZs) contribute to the attenuation of contaminants. An 18.3-m anoxic core was collected from the site, where constituents of concern (COCs) in groundwater included chlorinated solvents. Reactive Fe mineral coatings were found to be abundant in the RTZs. This research focused on evaluating reaction kinetics with anoxic sediments bearing ferrous mineral nano-coatings spiked with either tetrachloroethylene (PCE), trichloroethylene (TCE), or 1,4-dichlorobenzene (1,4-DCB). Reaction kinetics with RTZ sediments followed pseudo-first-order reactions for the three contaminants with 90% degradation achieved in less than 39 days. The second-order rate constants for the three COCs ranged from 6.20 × 10-4 to 1.73 × 10-3 Lg-1h-1 with pyrite (FeS2), 4.97 × 10-5 to 1.24 × 10-3 Lg-1h-1with mackinawite (FeS), 1.25 × 10-4 to 1.89 × 10-4 Lg-1h-1 with siderite (FeCO3), and 1.79 × 10-4 to 1.10 × 10-3 Lg-1h-1 with magnetite (Fe3O4). For these three chlorinated solvents, the trend for the rate constants followed: Fe(II) sulfide minerals > magnetite > siderite. The high reactivity of Fe mineral coatings is hypothesized to be due to the large surface areas of the nano-mineral coatings. As a result, these surfaces are expected to play an important role in the attenuation of chlorinated solvents in contaminated subsurface environments.
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Affiliation(s)
- Xin Yin
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07032, USA
| | - Han Hua
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07032, USA; Department of Civil, Construction & Environmental Engineering, University of New Mexico, Albuquerque, NM 87131, USA
| | - James Dyer
- Savannah River National Laboratory, Aiken, SC 29808, USA
| | | | - Donna Fennell
- Rutgers University, Department of Environmental Sciences, 14 College Farm Road, New Brunswick, NJ 08901, USA
| | - Lisa Axe
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technzhaology, Newark, NJ 07032, USA.
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Li Q, Yang S, Wu S, Fan D. Mechanochemically synthesized Al-Fe (oxide) composite with superior reductive performance: Solid-state kinetic processes during ball milling. CHEMOSPHERE 2022; 298:134280. [PMID: 35283156 DOI: 10.1016/j.chemosphere.2022.134280] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 02/14/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Recently, mechanical ball milling (BM), a simple and green powder processing method, has been successfully applied to improve the performance of zero-valent metals (ZVMs) for efficient water treatment. However, until now BM is still regarded as a "black box" in which the processes of the solid-state reaction during activation remain unclear. In this paper, firstly, FeSO4·7H2O crystal was used to activate and modify inert microscale zero-valent aluminum (mZVAl) by BM to synthesize Al-Fe (oxide)bm composite that showed superior reactivity in reductive removal of various contaminants and excellent reusability, which may be mainly ascribed to the newly formed iron oxide layer on mZVAl by mechanochemical reaction. At the same time, the formation of iron oxides on mZVAl was closely related to BM parameters. Further kinematic analysis revealed that the occurrence of mechanochemical reaction depended on the impact energy and input energy, which BM speed and BM time were two main factors determining reaction extent on the premise that the precursors were full dose. Moreover, kinetic fitting uncovered the solid-state reaction mechanism between mZVAl and FeSO4·7H2O conformed to three-dimensional diffusion and phase boundary reaction models. This study ponders deeply upon the mechanochemical process and solid reaction mechanism during the preparation of Al-Fe (oxide)bm composite, which deepens comprehensions of material synthesis procedures by BM and promotes applications of ZVM-based composite in polluted water or wastewater treatment.
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Affiliation(s)
- Qianfeng Li
- 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.
| | - Sui Wu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Danyang Fan
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
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Zhang J, Hu H, Chao J, Tang Y, Wan P, Yuan Q, Fisher AC, Coulon F, Hu Q, Yang XJ. Groundwater remediation using Magnesium-Aluminum alloys and in situ layered doubled hydroxides. ENVIRONMENTAL RESEARCH 2022; 204:112241. [PMID: 34695428 DOI: 10.1016/j.envres.2021.112241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 10/08/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
In situ remediation of groundwater by zerovalent iron (ZVI)-based technology faces the problems of rapid passivation, fast agglomeration, limited range of pollutants and secondary contamination. Here a new concept of Magnesium-Aluminum (Mg-Al) alloys and in situ layered double hydroxides on is proposed for the degradation and removal of a wide variety of inorganic and organic pollutants from groundwater. The Mg-Al alloy provides the electrons for the chemical reduction and/or the degradation of pollutants while released Mg2+, Al3+ and OH- ions react to generate in situ LDH precipitates, incorporating other divalent and trivalent metals and oxyanions pollutants and further adsorbing the micropollutants. The Mg-Al alloy outperforms ZVI for treating acidic, synthetic groundwater samples contaminated by complex chemical mixtures of heavy metals (Cd2+, Cr6+, Cu2+, Ni2+ and Zn2+), nitrate, AsO33-, methyl blue, trichloroacetic acid and glyphosate. Specifically, the Mg-Al alloy achieves removal efficiency ≥99.7% for these multiple pollutants at concentrations ranging between 10 and 50 mg L-1 without producing any secondary contaminants. In contrast, ZVI removal efficiency did not exceed 90% and secondary contamination up to 220 mg L-1 Fe was observed. Overall, this study provides a new alternative approach to develop efficient, cost-effective and green remediation for water and groundwater.
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Affiliation(s)
- Jingqi Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Hanjun Hu
- Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China; Beijing Huanding Environmental Big Data Institute, No. 1 Wangzhuang Road, Beijing, 100083, China
| | - Jingbo Chao
- National Institute of Metrology, Beijing, 100029, China
| | - Yang Tang
- National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Pingyu Wan
- National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Adrian C Fisher
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB2 1TN, UK
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Qing Hu
- Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China; Beijing Huanding Environmental Big Data Institute, No. 1 Wangzhuang Road, Beijing, 100083, China
| | - Xiao Jin Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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Li Y, Zhang Y, Yang S, Xue Y, Liu J, Wang M, Liu S, Chen Y. Citrate ligand-enhanced microscale zero-valent aluminum corrosion for carbon tetrachloride degradation with high electron utilization efficiency. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 783:146999. [PMID: 33865126 DOI: 10.1016/j.scitotenv.2021.146999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/28/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Carbon tetrachloride (CT) is highly toxic and recalcitrant in groundwater. In recent years, zero-valent aluminum (ZVAl) is highly reductive but limited by its surface passivation film. One of the effective ways to overcome this bottleneck is to add ligands. In this paper, compared with several other ligands, sodium citrate (SC), a natural organic ligand, was introduced to enhance microscale ZVAl (mZVAl) reactivity for the reductive degradation of CT. The results showed that the SC system could effectively reduce but not completely dechlorinate CT and electron utilization efficiency was as high as 94%. However, without ligands, mZVAl is chemically inert for CT degradation. Through SEM-EDS, BET, XRD, and XPS characterizations and H2 evolution experiments, enhanced mZVAl surface corrosion at the solid-liquid interface of mZVAl/SC system was verified. SC participated in the complexation corrosion reaction with surface inert film to form Al[Cit] complex, which made internal Al0 active sites exposed and then promoted mZVAl corrosion. In the five consecutive reuse experiments of mZVAl, CT can be completely degraded, which indicates that mZVAl, with the help of SC, has excellent sustainable utilization efficiency.
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Affiliation(s)
- Yang Li
- 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
| | - Yuqi Zhang
- 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.
| | - Yichao Xue
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Junqing Liu
- 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
| | - Shaojie Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Youyuan Chen
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China.
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7
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Wang Z, Liu W, Chen H, Zhang Z, Yang Z, Yang Q. Photoreductive degradation of CCl 4 by UV-Na 2SO 3: influence of various factors, mechanism and application. ENVIRONMENTAL TECHNOLOGY 2021; 42:217-226. [PMID: 31145050 DOI: 10.1080/09593330.2019.1625957] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
Due to the strong electron-withdrawing nature of Cl atom in CCl4, CCl4 could not readily be degraded by oxidation process. In the present study, aqueous electron (eaq -), a powerful reducing agent generated in UV-Na2SO3 system, was applied to reductively degradation of CCl4. The effects of several crucial factors (e.g. Na2SO3 concentration, solution pH, inorganic ions and NOM) on CCl4 degradation as well as degradation mechanism and pathway were systematically investigated. Results indicated that CCl4 was efficiently degraded in UV-Na2SO3 system and the process could be well described by pseudo-first order kinetic model. The degradation rate increased with the elevated Na2SO3 concentration (0-10 mmol/L) and solution pH (6.0-8.0), while remained approximately constant in alkaline conditions (pH = 8.0, 9.0 and 10.0). Nevertheless, O2, inorganic ions and NOM exerted a negative effect on CCl4 degradation and the removal efficiency of CCl4 in groundwater was only 31.7%. Mechanistic study implied that degradation of CCl4 was primarily induced by eaq -. CCl4 (10 mg/L) was almost completely dechlorinated within 60 min and the predominant intermediate products were CHCl3, C2Cl4 and C2HCl3. CHCl3 and CH2Cl2 were also rapidly degraded in the UV-Na2SO3 system.
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Affiliation(s)
- Zhen Wang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Wei Liu
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Hai Chen
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Zhonglei Zhang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Zhilin Yang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Qi Yang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
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Zhang J, Wu J, Chao J, Shi N, Li H, Hu Q, Yang XJ. Simultaneous removal of nitrate, copper and hexavalent chromium from water by aluminum-iron alloy particles. JOURNAL OF CONTAMINANT HYDROLOGY 2019; 227:103541. [PMID: 31481250 DOI: 10.1016/j.jconhyd.2019.103541] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 08/03/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
Groundwater contamination is a worldwide concern and the development of new materials for groundwater remediation has been of great interest. This study investigated removal kinetics and mechanisms of nitrate, copper ion and hexavalent chromium (20-50 mg L-1) by particles of Al-Fe alloy consisting of 20% Fe in batch reactors from a single KNO3, CuSO4, Cu(NO3)2, K2Cr2O7 and their mixed solutions. The effects of contaminant interactions and initial pH of the solution were examined and the alloy particles before and after reaction were characterized by X-ray diffraction spectrometer, scanning electron microscopy and X-ray photoelectron spectroscopy. The removal mechanisms were attributed to chemical reduction [Cu(II) to Cu, NO3- to NH3 and Cr(VI) to Cr(III)] and co-precipitation of Cr(III)-Al(III)-Fe(III) hydroxides/oxyhydroxides. Cu(II) enhanced the rates of NO3- and Cr(VI) reduction and Cr(VI) was an inhibitor for Cu(II) and NO3- reduction. This study demonstrates that Al-Fe alloy is of potential for groundwater remediation.
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Affiliation(s)
- Jingqi Zhang
- Beijing Key Laboratory of Membrane Science and Technology, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jing Wu
- Beijing Key Laboratory of Membrane Science and Technology, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jingbo Chao
- National Institute of Metrology, Beijing 100029, China
| | - Naijie Shi
- National Institute of Metrology, Beijing 100029, China
| | - Haifeng Li
- National Institute of Metrology, Beijing 100029, China
| | - Qing Hu
- Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Beijing Huanding Environmental Big Data Institute, No. 1 Wangzhuang Road, 100083 Beijing, China
| | - Xiao Jin Yang
- Beijing Key Laboratory of Membrane Science and Technology, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Wu S, Tang K, Zhang J, Chen X, Hu H, Hu Q, Yang XJ. Removal of 4-chlorophenol from polluted water by aluminum-iron alloys. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:1099-1106. [PMID: 31799953 DOI: 10.2166/wst.2019.349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Chlorophenols are extremely toxic to the environment and recalcitrant to biological degradation. Herein chemical degradation of 4-chlorophenol (4-CP) from aqueous solutions by zero-valent aluminum (Al), zero-valent iron (Fe), Al and Fe mixtures (Al/Fe mass ratio 90/10, labeled as Al/Fe10) and Al-Fe alloy (Al/Fe mass ratio 90/10, labeled as Al-Fe10) were investigated. No removal was found for 50 mg·L-1 4-CP under anoxic conditions at initial pH 2.5 during a period of 10 hrs while 56%, 83%, 78% and 99% of 4-CP were removed by Fe, Al, Al/Fe10 and Al-Fe10, respectively under aeration conditions. The removal of 4-CP by Al/Fe10 mixtures was primarily in the Fe mode in the beginning 4 h and then transitioned to the Al mode. The removal of 4-CP by Al-Fe10 alloy was accomplished via two intermediate products, hydroquinone (HQ) and 4-chlorocatechol (4-CC), and it was speculated that reactive oxygen species and hydroxyl radicals (·OH) play an important role in the degradation of 4-CP and that Al-Fe intermetallic compounds might catalyze the reactions. This study demonstrates that alloying Al with Fe offers a promising strategy for developing new materials for water and wastewater remediation.
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Affiliation(s)
- Shangze Wu
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Ka Tang
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Jingqi Zhang
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Xi Chen
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Hanjun Hu
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Qing Hu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Xiao Jin Yang
- Beijing Key Laboratory of Membrane Science and Technology and Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
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