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Ouyang W, Huang Y, Li C, Huang W, Yuan S, Liu H. Control of dissolved H 2 concentration enhances electron generation, transport and TCE reduction by indigenous microbial community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:177014. [PMID: 39423892 DOI: 10.1016/j.scitotenv.2024.177014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2024] [Revised: 10/14/2024] [Accepted: 10/15/2024] [Indexed: 10/21/2024]
Abstract
Electrokinetic enhanced bioremediation (EK-Bio) is practical for trichloroethene (TCE) dechlorination because the cathode can produce a wide range of dissolved H2 (DH) concentrations of 1.3-0 mg/L from the electrode to the aquifer. In this study, TCE dechlorination was investigated under different DH concentrations. The mechanisms were discussed by analyzing the microbial community structure and abundance of organohalide-respiring bacteria (OHRB) using 16S rRNA, and the gene abundances of key enzymes in the TCE electron transport chain using metagenomic analysis. The results showed that the moderate DH concentration of 0.19-0.53 mg/L exhibited the most pronounced TCE dechlorination, even better than the higher DH concentrations, due to the optimal redox environment, the enrichments of OHRB, reductive dehalogenase (rdhA) genes and key enzyme genes in the electron generation and transport chain. More electrons were obtained from H2 metabolism by Dehalobacter by promoting the formation of [NiFe] hydrogenase (HupS/L/C) or from glycolysis by versatile OHRB by stimulating the formation of formate and enriching formate dehydrogenase (FDH) under moderate DH conditions. In addition, the enhanced amino acid metabolism improved the vitamin K cycle for electron transport and enriched the reductive dechlorinating enzyme (RDase) genes. This study identifies the optimal DH concentration that facilitates bioremediation efficiency, provides insights into microbial community shifts and key enzymatic pathways in EK-Bio remediation.
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Affiliation(s)
- Weiwei Ouyang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430078, PR China
| | - Yao Huang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430078, PR China
| | - Cui Li
- Hubei Ecology Polytechnic College, Wuhan, Hubei 430200, PR China
| | - Wenyi Huang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430078, PR China
| | - Songhu Yuan
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430078, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei 430078, PR China
| | - Hui Liu
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430078, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei 430078, PR China.
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2
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Budania R, Dangayach S. A comprehensive review on permeable reactive barrier for the remediation of groundwater contamination. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117343. [PMID: 36758361 DOI: 10.1016/j.jenvman.2023.117343] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/31/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Groundwater quality is deteriorating due to contamination from both natural and anthropogenic sources. Traditional "Pump and Treat" techniques of treating the groundwater suffer from the disadvantages of a small-scale and energy-intensive approach. Permeable reactive barriers (PRBs), owing to their passive operation, offer a more sustainable strategy for remediation. This promising technique focuses on eliminating heavy metal pollutants and hazardous aromatic compounds by physisorption, chemisorption, precipitation, denitrification, and/or biodegradation. Researchers have utilized ZVI, activated carbon, natural and manufactured zeolites, and other by-products as reactive media barriers. Environmental parameters, i.e., pH, initial pollutant concentration, organic substance, dissolved oxygen, and reactive media by-products, all influence a PRB's performance. Although their long-term impact and performance are uncertain, PRBs are still evolving as viable alternatives to pump-and-treat techniques. The use of PRBs to remove anionic contaminants (e.g., Fluoride, Nitrate, etc.) has received less attention since precipitates can clog the reactive barrier and hinder groundwater flow. In this paper, we present an insight into this approach and the tremendous implications for future scientific study that integrates this strategy using sustainability and explores the viability of PRBs for anionic pollutants.
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Affiliation(s)
- Ravindra Budania
- Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, 302017, Rajasthan, India.
| | - Sanyam Dangayach
- Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, 302017, Rajasthan, India.
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Zhu X, Wang X, Li N, Wang Q, Liao C. Bioelectrochemical system for dehalogenation: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118519. [PMID: 34793908 DOI: 10.1016/j.envpol.2021.118519] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/26/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Halogenated organic compounds are persistent pollutants, whose persistent contamination and rapid spread seriously threaten human health and the safety of ecosystems. It is difficult to remove them completely by traditional physicochemical techniques. In-situ remediation utilizing bioelectrochemical technology represents a promising strategy for degradation of halogenated organic compounds, which can be achieved through potential modulation. In this review, we summarize the reactor configuration of microbial electrochemical dehalogenation systems and relevant organohalide-respiring bacteria. We also highlight the mechanisms of electrode potential regulation of microbial dehalogenation and the role of extracellular electron transfer in dehalogenation process, and further discuss the application of bioelectrochemical technology in bioremediation of halogenated organic compounds. Therefore, this review summarizes the status of research on microbial electrochemical dehalogenation systems from macroscopic to microscopic levels, providing theoretical support for the development of rapid and efficient in situ bioremediation technologies for halogenated organic compounds contaminated sites, as well as insights for the removal of refractory fluorides.
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Affiliation(s)
- Xuemei Zhu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China
| | - Nan Li
- School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Qi Wang
- Beijing Construction Engineering Group Environmental Remediation Co. Ltd. and National Engineering Laboratory for Site Remediation Technologies, Beijing, 100015, China
| | - Chengmei Liao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China.
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4
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Pilot-Scale Evaluation of a Permeable Reactive Barrier with Compost and Brown Coal to Treat Groundwater Contaminated with Trichloroethylene. WATER 2019. [DOI: 10.3390/w11091922] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluates, under field conditions, the efficiency of a permeable reactive barrier (PRB) with compost and brown coal to remove trichloroethylene (TCE) (109 µg/L) from contaminated groundwater. Three stainless steel boxes (1.2 × 0.5 × 0.5 m) with the brown coal-compost mixture at three different mixing ratios of 1:1, 1:3, and 1:5 (by volume) were installed to simulate the PRB. Groundwater from the TCE-contaminated aquifer was pumped into the system at a flow rate of 3.6 L/h. Residence times in the boxes were of: 25, 20, 10 h, respectively. Effluent samples were analyzed for TCE and its daughter products: dichloroethylene (DCE), vinyl chloride (VC) and ethane. During the 198-day experimental period TCE concentrations in groundwater decreased below ≤1.1 µg/L, i.e., much lower than groundwater and drinking water standards in Poland. After 16 days cis-1,2-DCE was monitored indicating possible reductive dechlorination of TCE. However, complete transformation of TCE into non-toxic byproducts was not evidenced during the time of experiments, indicating that reductive dechlorination slowed down or stopped at DCE, and that the designed residence times were not long enough to allow the complete dechlorination process.
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Niño de Guzmán GT, Hapeman CJ, Millner PD, Torrents A, Jackson D, Kjellerup BV. Presence of organohalide-respiring bacteria in and around a permeable reactive barrier at a trichloroethylene-contaminated Superfund site. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:766-776. [PMID: 30228068 DOI: 10.1016/j.envpol.2018.08.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/29/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
Trichloroethylene (TCE) is one of the most common groundwater contaminants in the United States; however clean-up efforts are a challenge due to its physical and chemical properties. TCE and several of its degradation products were detected in the groundwater of the Beaver Dam Road Landfill site (Beltsville, MD) at concentrations above accepted maximum contaminant levels. A permeable reactive barrier (i.e., biowall) was installed to remediate the groundwater. Microbial infiltration and colonization of the biowall with native site bacteria was expected to occur. An array of molecular biological tools was applied to survey the microbial community for presence of organohalide-respiring microorganisms at the site. Microorganisms belonging to methanogens, acetogens, sulfate-reducing bacteria, and chlorinated aliphatic hydrocarbon-metabolizing bacteria were identified, thus making way for the application of the microbial populations in the biowall bioaugmentation efforts. In concomitant laboratory studies, molecular approaches were used to monitor continuously-fed column reactors containing saturated biowall material spiked with a commercially-available, Dehalococcoides-containing culture (SDC-9), with or without zero-valent iron (ZVI) shavings. The column without ZVI had the highest abundance of Dehalococcoides spp. (2.7 × 106 cells g-1 material, S.D. = 3.8 × 105 cells g-1 material), while the addition of ZVI did not affect the overall population. Although the addition of ZVI and biostimulation did change ratios of the Dehalococcoides strains, the results suggests that if ZVI would be applied as a biowall material amendment, biostimulation would not be required to maintain a Dehalococcoides population. These experimental results will be utilized in future remediation and/or biowall expansion plans to utilize the natural resources most effectively at the biowall site.
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Affiliation(s)
| | - Cathleen J Hapeman
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Patricia D Millner
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Alba Torrents
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA
| | - Dana Jackson
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Birthe V Kjellerup
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA.
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Niño de Guzmán GT, Hapeman CJ, Millner PD, McConnell LL, Jackson D, Kindig D, Torrents A. Using a high-organic matter biowall to treat a trichloroethylene plume at the Beaver Dam Road landfill. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8735-8746. [PMID: 29327189 DOI: 10.1007/s11356-017-1137-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 12/26/2017] [Indexed: 06/07/2023]
Abstract
Trichloroethylene (TCE) is a highly effective industrial degreasing agent and known carcinogen. It was frequently buried improperly in landfills and has subsequently become one of the most common groundwater and soil contaminants in the USA. A common strategy to remediate TCE-contaminated sites and to prevent movement of the TCE plumes into waterways is to construct biowalls which consist of biomaterials and amendments to enhance biodegradation. This approach was chosen to contain a TCE plume emanating from a closed landfill in Maryland. However, predicting the effectiveness of biowalls is often site specific. Therefore, we conducted an extensive series of batch reactor studies at 12 °C as opposed to the typical room temperature to examine biowall fill-material combinations including the effects of zero-valent iron (ZVI) and glycerol amendments. No detectable TCE was observed after several months in the laboratory study when using the unamended 4:3 mulch-to-compost combination. In the constructed biowall, this mixture reduced the upstream TCE concentration by approximately 90% and generated ethylene downstream, an indication of successful reductive dechlorination. However, the more toxic degradation product vinyl chloride (VC) was also detected downstream at levels approximately ten times greater than the maximum contaminant level. This indicates that incomplete degradation also occurred. In the laboratory, ZVI reduced VC formation. A hazard quotient was calculated for the landfill site with and without the biowall. The addition of the biowall decreased the hazard quotient by 88%.
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Affiliation(s)
| | - Cathleen J Hapeman
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Patricia D Millner
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | - Laura L McConnell
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA
| | - Dana Jackson
- US Department of Agriculture, Agricultural Research Service, Beltsville, MD, USA
| | | | - Alba Torrents
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA.
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Xin J, Han J, Zheng X, Shao H, Kolditz O. Mechanism insights into enhanced trichloroethylene removal using xanthan gum-modified microscale zero-valent iron particles. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2015; 150:420-426. [PMID: 25556871 DOI: 10.1016/j.jenvman.2014.12.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/05/2014] [Accepted: 12/10/2014] [Indexed: 06/04/2023]
Abstract
This report focuses on the enhancement in trichloroethylene (TCE) removal from contaminated groundwater using xanthan gum (XG)-modified, microscale, zero-valent iron (mZVI). Compared with bare mZVI, XG-coated mZVI increased the TCE removal efficiency by 30.37% over a 480-h experimental period. Because the TCE removal is attributed to both sorption and reduction processes, the contributions from sorption and reduction were separately investigated to determine the mechanism of XG on TCE removal using mZVI. The results showed that the TCE sorption capacity of mZVI was lower in the presence of XG, whereas the TCE reduction capacity was significantly increased. The FTIR spectra confirmed that XG, which is rich in hydrophilic functional groups, was adsorbed onto the iron surface through intermolecular hydrogen bonds, which competitively repelled the sorption and mass transfer of TCE toward reactive sites. The variations in the pH, Eh, and Fe(2+) concentration as functions of the reaction time were recorded and indicated that XG buffered the solution pH, inhibited surface passivation, and promoted TCE reduction by mZVI. Overall, the XG-modified mZVI was considered to be potentially effective for the in-situ remediation of TCE contaminated groundwater due to its high stability and dechlorination reactivity.
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Affiliation(s)
- Jia Xin
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jun Han
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Xilai Zheng
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
| | - Haibing Shao
- Helmholtz Center for Environmental Research UFZ/TU Dresden, Leipzig 034202, Germany
| | - Olaf Kolditz
- Helmholtz Center for Environmental Research UFZ/TU Dresden, Leipzig 034202, Germany
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Zhou D, Li Y, Zhang Y, Zhang C, Li X, Chen Z, Huang J, Li X, Flores G, Kamon M. Column test-based optimization of the permeable reactive barrier (PRB) technique for remediating groundwater contaminated by landfill leachates. JOURNAL OF CONTAMINANT HYDROLOGY 2014; 168:1-16. [PMID: 25244420 DOI: 10.1016/j.jconhyd.2014.09.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 08/27/2014] [Accepted: 09/03/2014] [Indexed: 06/03/2023]
Abstract
We investigated the optimum composition of permeable reactive barrier (PRB) materials for remediating groundwater heavily contaminated by landfill leachate, in column tests using various mixtures of zero-valent iron (ZVI), zeolite (Zeo) and activated carbon (AC) with 0.01-0.25, 3.0-5.0 and 0.7-1.0mm grain sizes, respectively. The main contributors to the removal of organic/inorganic contaminants were ZVI and AC, and the optimum weight ratio of the three PRB materials for removing the contaminants and maintaining adequate hydraulic conductivity was found to be 5:1:4. Average reductions in chemical oxygen demand (COD) and contents of total nitrogen (TN), ammonium, Ni, Pb and 16 polycyclic aromatic hydrocarbons (PAHs) from test samples using this mixture were 55.8%, 70.8%, 89.2%, 70.7%, 92.7% and 94.2%, respectively. We also developed a systematic method for estimating the minimum required thickness and longevity of the PRB materials. A ≥ 309.6 cm layer with the optimum composition is needed for satisfactory longevity, defined here as meeting the Grade III criteria (the Chinese National Bureau of Standards: GB/T14848/93) for in situ treatment of the sampled groundwater for ≥ 10 years.
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Affiliation(s)
- Dan Zhou
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China; Key Laboratory for Aquatic Product Safety of Ministry of Education, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China
| | - Yan Li
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China; Key Laboratory for Aquatic Product Safety of Ministry of Education, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China.
| | - Yinbo Zhang
- South China Institute of Environmental Science, Ministry of Environmental Protection, No. 7 West Street, Yuancun, Guangzhou 510655, PR China
| | - Chang Zhang
- Shandong Bonaray Analysis Instrument Technology Co., Ltd, Building A5, High and New Technology Industrial Development Zone, Jining 272000, PR China
| | - Xiongfei Li
- Guangdong Provincial Environmental Technology Center, 28 Modiesha Avenue, Xingang Dong Road, Guangzhou 510308, PR China
| | - Zhiliang Chen
- South China Institute of Environmental Science, Ministry of Environmental Protection, No. 7 West Street, Yuancun, Guangzhou 510655, PR China
| | - Junyi Huang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China; Key Laboratory for Aquatic Product Safety of Ministry of Education, School of Marine Sciences, Sun Yat-sen, University, 135 Xin'gang RD.W., Guangzhou 510275, PR China
| | - Xia Li
- Nanhai Environmental Technology Center of Foshan City, Environmental Protection Building, 4 New RD. 3S., Guicheng, Foshan 528200, PR China
| | - Giancarlo Flores
- Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Kyoto 606-8501, Japan
| | - Masashi Kamon
- National College of Technology, 355 Chokushicho, Takamatsu-shi, Kagawa 761-8058, Japan
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Obiri-Nyarko F, Grajales-Mesa SJ, Malina G. An overview of permeable reactive barriers for in situ sustainable groundwater remediation. CHEMOSPHERE 2014; 111:243-59. [PMID: 24997925 DOI: 10.1016/j.chemosphere.2014.03.112] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 03/14/2014] [Accepted: 03/22/2014] [Indexed: 05/26/2023]
Abstract
Permeable reactive barriers (PRBs) are one of the innovative technologies widely accepted as an alternative to the 'pump and treat' (P&T) for sustainable in situ remediation of contaminated groundwater. The concept of the technology involves the emplacement of a permeable barrier containing reactive materials across the flow path of the contaminated groundwater to intercept and treat the contaminants as the plume flows through it under the influence of the natural hydraulic gradient. Since the invention of PRBs in the early 1990s, a variety of materials has been employed to remove contaminants including heavy metals, chlorinated solvents, aromatic hydrocarbons, and pesticides. Contaminant removal is usually accomplished via processes such as adsorption, precipitation, denitrification and biodegradation. Despite wide acknowledgment, there are still unresolved issues about long term-performance of PRBs, which have somewhat affected their acceptability and full-scale implementation. The current paper presents an overview of the PRB technology, which includes the state of art, the merits and limitations, the reactive media used so far, and the mechanisms employed to transform or immobilize contaminants. The paper also looks at the design, construction and the long-term performance of PRBs.
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Affiliation(s)
- Franklin Obiri-Nyarko
- Hydrogeotechnika Sp z oo, Department of Environmental Protection and Cartography, ul. Sciegiennego 262A, 25-112, Kielce, Poland
| | - S Johana Grajales-Mesa
- AGH University of Science and Technology, Department of Hydrogeology and Engineering Geology, Al. Mickiewicza 30, 30-059, Kraków, Poland.
| | - Grzegorz Malina
- AGH University of Science and Technology, Department of Hydrogeology and Engineering Geology, Al. Mickiewicza 30, 30-059, Kraków, Poland
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