1
|
Ouyang Q, Tobler DJ, Deng J, Huang L, Jakobsen R, Hansen HCB. Fast degradation of vinyl chloride by green rust and nitrogen-doped graphene. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172825. [PMID: 38692311 DOI: 10.1016/j.scitotenv.2024.172825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/03/2024]
Abstract
Carbonaceous materials catalyze reductive dechlorination of chlorinated ethylenes (CEs) by iron(II) materials providing a new approach for the remediation of CE polluted groundwater. While most CEs are reduced via β-elimination, vinyl chloride (VC), the most toxic and recalcitrant CE, degrades by hydrogenolysis. The significance of carbon catalysts for reduction of VC is well documented for iron(0) systems, but hardly investigated with iron(II) materials as reductants. In this study, a layered iron(II)‑iron(III) hydroxide sulfate (green rust) was used as reductant for VC, with an N-doped graphene (NG), prepared by co-pyrolysis of graphene and urea, as catalyst. VC (80 μM) was completely reduced to ethylene within 336 h in the presence of 5 g Fe/L GR and 5 g/L NG pyrolyzed at 950 °C, following pseudo-first-order kinetics with a rate constant of 0.017 h-1. Dosing experiments demonstrated that dechlorination of VC takes place on the NG phase. Monitoring of hydrogen formation, cyclic voltammetry, and quenching experiments demonstrated that atomic hydrogen contributes significantly to the dehalogenation reaction, where NG is critical for formation of atomic hydrogen. CE competition experiments demonstrated the presence of specific VC reduction sites with hydrogenolysis being unaffected by concurrent β-elimination reactions. The system exhibited excellent performance in natural groundwaters and in comparison with iron(0) systems. This study demonstrates that GR + NG is a promising system for remediation of VC contaminated groundwater, and the mechanistic part of the study can be used as a reference for subsequent studies.
Collapse
Affiliation(s)
- Qiong Ouyang
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
| | - Dominique J Tobler
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Jia Deng
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan, PR China
| | - Lizhi Huang
- School of Civil Engineering, Wuhan University, No. 8, East Lake South Road, Wuhan, PR China
| | - Rasmus Jakobsen
- Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 København K, Denmark
| | - Hans Chr B Hansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| |
Collapse
|
2
|
Yin Z, Cagnetta G, Huang J. Mechanochemically sulfidated zero-valent iron as persulfate activation catalyst in permeable reactive barriers for groundwater remediation - A feasibility study. CHEMOSPHERE 2023; 311:137081. [PMID: 36334758 DOI: 10.1016/j.chemosphere.2022.137081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 07/27/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
The technology of permeable reactive barriers is reliable and economically effective to prevent the spread of pollutants in groundwaters. Yet, it is efficacious only with easily reducible chemicals such as heavy metals and halogenated organics. In the present study, sulfidated zero-valent iron solventless synthesized by ball-milling is proposed as a possible barrier filling for activation of persulfate to achieve sound removal of reduction-resistant organic pollutants (the herbicide atrazine was used as a model pollutant). Preliminary batch experiments demonstrated rapid degradation of atrazine. Continuous experiments executed in columns proved the superior efficiency of sulfidated iron as a persulfate activator, compared to zero-valent iron, in terms of removal of both atrazine and byproducts. Optimal atrazine removal in the column was achieved with 10% sulfidated iron packing, and 9 mM persulfate at a hydraulic residence time of 6.02 h. Under such conditions, the estimated bed length of the reactive barrier for 99% atrazine removal was 8.69 cm. The morphology and surface-active species in the column demonstrated that activation of persulfate mainly occurred at the inlet of the column until the complete usage of the active species. Batch experiments with coexisting ions suggested that they have a minor influence on atrazine removal percentage, while Mg2+, Ca2+, CO2- and HCO- had a significant impact on the kinetics of the process. However, analogous column experiments demonstrated that the coexisting ions have a negative influence on both atrazine and its byproducts. The results obtained in this study corroborate the potential application of persulfate-enhanced permeable reactive barriers for in situ removal of atrazine from underground water.
Collapse
Affiliation(s)
- Zhou Yin
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control (BKLEOC), Beijing Laboratory for Environmental Frontier Technologies (BLEFT), School of Environment, Tsinghua University, Beijing, 100084, China
| | - Giovanni Cagnetta
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control (BKLEOC), Beijing Laboratory for Environmental Frontier Technologies (BLEFT), School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jun Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control (BKLEOC), Beijing Laboratory for Environmental Frontier Technologies (BLEFT), School of Environment, Tsinghua University, Beijing, 100084, China.
| |
Collapse
|
3
|
Elzinga EJ. Mechanistic Study of Ni(II) Sorption by Green Rust Sulfate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:10411-10421. [PMID: 34283583 DOI: 10.1021/acs.est.1c01442] [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] [Indexed: 06/13/2023]
Abstract
The sorption of Ni(II) by green rust sulfate (GR-sulfate) was studied in anoxic pre-equilibrated suspensions at pH 7.0 and pH 7.8 with combined batch kinetic experiments, X-ray diffraction measurements, and Ni K-edge X-ray absorption spectroscopy (XAS) analyses. Continuous removal of aqueous Ni(II) was observed over the course of the reaction (1-2.5 weeks) at both pH values, with no concurrent changes in aqueous Fe(II) levels or detectable mineralogical modifications of the GR sorbent. XAS results indicate that Ni(II) is not retained as mononuclear adsorption complexes on the GR surface but rather incorporated in the octahedral layers of an FeII0.67-xNiIIxFeIII0.33(OH)2-layered double hydroxide (LDH) phase with 0 < x < 0.67. The combined macroscopic and spectroscopic data suggest that Ni(II) substitutes into the GR lattice during Fe(II)-catalyzed recrystallization of the sorbent and/or forms secondary Ni(II)/Fe(II)-Fe(III)-LDH phases with a higher stability than that of GR, complemented likely by Ni(II)-Fe(II) exchange at GR particle edges. The results of this study reveal GR to be a dynamic sorbent that engages in dissolution-reprecipitation and exchange reactions, causing extensive incorporation of trace metal Ni(II)aq. Additional work is needed to further define the mechanisms involved and to assess the sorptive reactivity of GR with other trace metal species.
Collapse
Affiliation(s)
- Evert J Elzinga
- Department of Earth & Environmental Sciences, Rutgers University, 101Warren Street, Newark, New Jersey 07102, United States
| |
Collapse
|
4
|
Zhang Y, Ozcer P, Ghoshal S. A comprehensive assessment of the degradation of C1 and C2 chlorinated hydrocarbons by sulfidated nanoscale zerovalent iron. WATER RESEARCH 2021; 201:117328. [PMID: 34171646 DOI: 10.1016/j.watres.2021.117328] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/30/2021] [Accepted: 06/02/2021] [Indexed: 06/13/2023]
Abstract
Sulfidated nanoscale zerovalent iron (S-nZVI) is a promising reductant for trichloroethylene in groundwater, yet a comprehensive understanding of its degradation efficiency for other chlorinated hydrocarbons (CHCs) is lacking. In this study, we assessed the benefits of using S-nZVI for the degradation of two chlorinated methanes, three chlorinated ethanes, and four chlorinated ethenes compared to unamended nZVI, by analyzing the degradation rate constants, the maximum degradation quantity, and the degradation pathways and products under both stoichiometrically electron excess and limited conditions. The improvement in rate constants induced by sulfidation was compound specific and was more significant for chlorinated ethenes (57-707 folds) than for the other CHCs (1.0-17 folds). This is likely because of the different reduction mechanisms of each CHC and sulfidation may favor specific mechanisms associated with the reduction of chlorinated ethenes more than the others. Sulfidation of nZVI enabled either higher (3.1-24.4 folds) or comparable (0.78-0.91) maximum degradation quantity, assessed under electron limited conditions, for all the CHCs investigated, indicating the promise of S-nZVI for remediation of groundwater contaminated by CHC mixtures. Furthermore, we proposed the degradation pathways of various CHCs based on the observed degradation intermediates and products and found that sulfidation suppressed the generation of partially dechlorinated products, particularly for chlorinated methanes and ethanes, and favor degradation pathways leading to the non-chlorinated benign products. This is the first comprehensive study on the efficacy of sulfidation in improving the degradation of a suite of CHCs and the results provide valuable insight to the assessment of applicability and benefits of S-nZVI for CHC remediation.
Collapse
Affiliation(s)
- Yanyan Zhang
- Department of Civil Engineering, McGill University, 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
| | - Pinar Ozcer
- Department of Civil Engineering, McGill University, Montreal, Quebec H3A 0C3, Canada
| | - Subhasis Ghoshal
- Department of Civil Engineering, McGill University, Montreal, Quebec H3A 0C3, Canada.
| |
Collapse
|
5
|
Huang J, Yin W, Li P, Bu H, Lv S, Fang Z, Yan M, Wu J. Nitrate mediated biotic zero valent iron corrosion for enhanced Cd(II) removal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140715. [PMID: 32698046 DOI: 10.1016/j.scitotenv.2020.140715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/14/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
In this study, nitrate mediated biotic zero-valent iron (Fe0) corrosion was employed to enhance cadmium (Cd) removal from groundwater. In comparison with a 17.5% Cd(II) removal treated with abiotic Fe0, a 3.9 times higher Cd(II) removal of 86.2% was recorded in the nitrate-mediated biotic Fe0 system. Solids phase characterization confirmed that biogenic minerals such as green rust and iron sulfide could be formed in the nitrate-amended biotic Fe0 system, offering large amount of adsorption sites for Cd(II) removal. The decrease of nitrate concentration and the competition with cathodic hydrogen for biological nitrate reduction by extra organic substance such as sodium acetate both showed significant inhibition on Cd(II) removal, further proving that hydrogenotrophic denitrification was the main mechanism for enhanced Cd(II) removal. Besides, a relatively high Cd(II) removal efficiency was observed over a pH range of 5-8, and it increased with declining pH values. These results demonstrated that the bio-amended iron corrosion technology coupled Fe0-assisted H2 production with hydrogenotrophic denitrification exhibited excellent Cd(II) removal capacity, which enabled this technology a promising potential for Cd(II)-contaminated groundwater treatment and an alternative strategy for Cd(II) and nitrate co-contaminated groundwater remediation.
Collapse
Affiliation(s)
- Jingling Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Weizhao Yin
- School of Environment, Jinan University, Guangzhou 510632, China
| | - Ping Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Huaitian Bu
- SINTEF Industry, Department of Materials and Nanotechnology, Forskningsveien 1, 0373 Oslo, Norway
| | - Sihao Lv
- School of Chemistry and Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Zhanqiang Fang
- School of Environment, South China Normal University, Guangzhou 510006, China
| | - Mingjia Yan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jinhua Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou 510006, China.
| |
Collapse
|
6
|
Yin W, Fang Z, Huang J, Li P, Zhong J, Chiang P, Wu J. Effects of seepage velocity and concentration on chromium(VI) removal in abiotic and biotic iron columns. JOURNAL OF ENVIRONMENTAL QUALITY 2020; 49:654-662. [PMID: 33016401 DOI: 10.1002/jeq2.20018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 10/21/2019] [Accepted: 12/09/2019] [Indexed: 06/11/2023]
Abstract
Continuous-flow iron and bio-iron columns were used to evaluate the effects of seepage velocity and concentration on Cr(VI) removal from groundwater. Solid-phase analysis showed that microorganisms accelerated iron corrosion by excreting extracellular polymeric substances and generated highly reactive minerals containing Fe(II), which gave the bio-iron column a longer life span and enhanced capacity for Cr(VI) removal via enhanced adsorption and reduction by reactive minerals. The bio-iron column showed much higher Cr(VI) removal capacity than the iron column with increasing Cr(VI) loading, which was obtained by increasing the seepage velocity or influent Cr(VI) concentration from 95 to 1138 m yr-1 and from 5 to 40 mg L-1 , respectively. When the Cr(VI) loading varied in a range of 0 to 10 mg L-1 h-1 , the bio-iron column had a 60% longer longevity and one- to sixfold higher Cr(VI) elimination capacity than the iron column. This result indicated that, under fluctuating hydraulic conditions [e.g., seepage velocity and Cr(VI) concentration], the presence of microorganisms can significantly boost Cr(VI) removal using Fe0 -based permeable reactive barriers.
Collapse
Affiliation(s)
- Weizhao Yin
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
- School of Environment, Jinan Univ., Guangzhou, 510632, PR China
| | - Zhanqiang Fang
- School of Chemistry and Environment, South China Normal Univ., Guangzhou, 510006, PR China
| | - Jingling Huang
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
| | - Ping Li
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
| | - Jiawei Zhong
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
| | - Penchi Chiang
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
| | - Jinhua Wu
- School of Environment and Energy, South China Univ. of Technology, Guangzhou, 510006, PR China
- Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
- Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou, 510006, PR China
| |
Collapse
|
7
|
Puigserver D, Herrero J, Parker BL, Carmona JM. Natural attenuation of pools and plumes of carbon tetrachloride and chloroform in the transition zone to bottom aquitards and the microorganisms involved in their degradation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:135679. [PMID: 31785913 DOI: 10.1016/j.scitotenv.2019.135679] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/19/2019] [Accepted: 11/19/2019] [Indexed: 05/20/2023]
Abstract
In the transition zone between aquifers and aquitards, DNAPL pools of carbon tetrachloride and chloroform accumulate because of heterogeneity in this zone. Natural attenuation occurs at pools and plumes, indicating that remediation might be possible. The aims of the study were: i) to assess the role of heterogeneity in the natural attenuation of these compounds, ii) determine degradation processes within this zone, and iii) identify dechlorinating microorganisms. For this, groundwater concentrations, redox-sensitive parameters, CSIA isotopic and DGGE molecular techniques were used. The main findings at depth of the transition zone were: (1) the important key control played by heterogeneity on natural attenuation of contaminants. (2) Heterogeneity caused the highly anoxic environment and dominant sulfate-reducing conditions, which accounts for more efficient natural attenuation. (3) Heterogeneity also explains that the transition zone constitutes an ecotone. (4) The bacteria size exclusion is governed by the pore throat threshold and determines the penetration of dechlorinating microorganisms into the finest sediments, which is relevant, since it implies the need to verify whether microorganisms proposed for bioremediation can penetrate these materials. (5) Reductive dechlorination caused the natural attenuation of contaminants in groundwater and porewater of fine sediments. In the case of carbon tetrachloride, it was an abiotic process biogenically mediated by A. suillum, a bacterium capable of penetrating the finest sediments. In the case of chloroform, it was a biotic process performed by a Clostridiales bacterium, which is unable to penetrate the finest materials. (6) Both microorganisms have potential to be biostimulated to dechlorinate contaminants in the source and the plume in the transition zone. These outcomes are particularly relevant given the longevity of DNAPL sources and have considerable environmental implications as many supply wells in industrial areas exploit aquifers contaminated by chlorinated solvents emerging from DNAPL pools accumulated on the low-conductivity layers in transition zones.
Collapse
Affiliation(s)
- Diana Puigserver
- Dept. of Mineralogy, Petrology and Applied Geology, Faculty of Earth Sciences, University of Barcelona, C/Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| | - Jofre Herrero
- Dept. of Mineralogy, Petrology and Applied Geology, Faculty of Earth Sciences, University of Barcelona, C/Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| | - Beth L Parker
- School of Engineering, University of Guelph, 50, Stone Road East, Guelph, N1G 2W1, Ontario, Canada.
| | - José M Carmona
- Dept. of Mineralogy, Petrology and Applied Geology, Faculty of Earth Sciences, University of Barcelona, C/Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| |
Collapse
|
8
|
Qiu H, Wang X, Cen J, Shi P, Fan J, Min Y, Xu Q. A novel path to prepare Fe/Al–layered double hydroxide nanosheets by sacrificial double anodes for the treatment of Cr-containing wastewater. J Colloid Interface Sci 2019; 542:73-80. [DOI: 10.1016/j.jcis.2019.01.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 01/17/2019] [Accepted: 01/18/2019] [Indexed: 12/01/2022]
|
9
|
Yin W, Ai J, Huang LZ, Tobler DJ, B Hansen HC. A Silicate/Glycine Switch To Control the Reactivity of Layered Iron(II)-Iron(III) Hydroxides for Dechlorination of Carbon Tetrachloride. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7876-7883. [PMID: 29905472 DOI: 10.1021/acs.est.8b02020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Layered FeII-FeIII hydroxide chloride (chloride green rust, GRCl) has high reactivity toward reducible pollutants such as chlorinated solvents. However, this reactive solid is prone to dissolution, and hence loss of reactivity, during storage and handling. In this study, adsorption of silicate (Si) to GRCl was tested for its ability to minimize GRCl dissolution and to inhibit reduction of carbon tetrachloride (CT). Silicate adsorbed with high affinity to GRCl yielding a sorption maximum of 0.026 g of Si/g of GRCl. In the absence of Si, the pseudo-first-order rate constant for CT dehalogenation by GRCl was 2.1 h-1, demonstrating very high reactivity of GRCl but with substantial FeII dissolution up to 2.5 mM. When Si was adsorbed to GRCl, CT dehalogenation was blocked and FeII dissolution extent was reduced by a factor of 28. The addition of glycine (Gly) was tested for reactivation of the Si-blocked GRCl for CT dehalogenation. At 30 mM Gly, partial reactivation of the GRCl was observed with pseudo-first-order rate constant for CT reduction of 0.075 h-1. This blockage and reactivation of GRCl reactivity demonstrates that it is possible to design a switch for GRCl to control its stability and reactivity under anoxic conditions.
Collapse
Affiliation(s)
- Weizhao Yin
- School of Environment , Jinan University , Guangzhou 510632 , China
- Department of Plant and Environmental Sciences, Faculty of Life Sciences , University of Copenhagen , Thorvaldsensvej 40 , DK-1871 Frederiksberg C , Denmark
| | - Jing Ai
- Department of Plant and Environmental Sciences, Faculty of Life Sciences , University of Copenhagen , Thorvaldsensvej 40 , DK-1871 Frederiksberg C , Denmark
| | - Li-Zhi Huang
- School of Civil Engineering , Wuhan University , No. 8, East Lake South Road , Wuhan , China
- Interdisciplinary Nanoscience Center , Aarhus University , Gustav Wieds Vej 14 , DK-8000 Aarhus C , Denmark
| | - Dominique J Tobler
- Nano-Science Center, Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 , København Ø , Denmark
| | - Hans Christian B Hansen
- Department of Plant and Environmental Sciences, Faculty of Life Sciences , University of Copenhagen , Thorvaldsensvej 40 , DK-1871 Frederiksberg C , Denmark
| |
Collapse
|