1
|
Feng Z, Yang Z, Yang S, Xiong H, Ning Y, Wang C, Li Y. Current status and future challenges of chlorobenzenes pollution in soil and groundwater (CBsPSG) in the twenty-first century: a bibliometric analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:111748-111765. [PMID: 37843707 DOI: 10.1007/s11356-023-29956-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/14/2023] [Indexed: 10/17/2023]
Abstract
The global industrial structure had undertaken significant changes since the twenty-first century, making a severe problem of chlorobenzene pollution in soil and groundwater (CBsPSG). CBsPSG receives increasing attention due to the high toxicity, persistence, and bioaccumulation of chlorobenzenes. To date, despite the gravity of this issue, no bibliometric analysis (BA) of CBsPSG does exist. This study fills up the gap by conducting a BA of 395 articles related to CBsPSG from the Web of Science Core Collection database using CiteSpace. Based on a comprehensive analysis of various aspects, including time-related, related disciplines, keywords, journal contribution, author productivity, and institute and country distribution, the status, development, and hotspots of research in the field were shown visually and statistically. Moreover, this study has also delved into the environmental behavior and remediation techniques of CBsPSG. In addition, four challenges (unequal research development, insufficient cooperation, deeply mechanism research, and developing new technologies) have been identified, and corresponding suggestions have been proposed for the future development of research in the field. Afterwards, the limitations of BA were discussed. This work provides a powerful insight into CBsPSG, enabling to quickly identify the hotspot and direction of future studies by relevant researchers.
Collapse
Affiliation(s)
- Zhi Feng
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Zhe Yang
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Sen Yang
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Hanxiang Xiong
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Yu Ning
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Changxiang Wang
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Yilian Li
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China.
| |
Collapse
|
2
|
Chang SH, Wu CF, Yang CF, Lin CW. Evaluation use of bioaugmentation and biostimulation to improve degradation of sulfolane in artificial groundwater. CHEMOSPHERE 2021; 263:127919. [PMID: 32829221 DOI: 10.1016/j.chemosphere.2020.127919] [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: 05/12/2020] [Revised: 07/22/2020] [Accepted: 08/03/2020] [Indexed: 06/11/2023]
Abstract
Column systems were used to evaluate the effectiveness of different bioremediation methods (biostimulation (BS) and bioaugmentation (BA)) in treating sulfolane-contaminated groundwater. Batch test results confirmed that Cupriavidus sp. Y9 (Y9) was the most effective strain for BA. The optimal ratio of added native bacteria to Y9 was 10:3. The BA column adapted to a high sulfolane concentration (150 mg L-1) more rapidly and had higher sulfolane removal efficiency (90%) than did the BS column. The change in the biotoxicity of sulfolane-contaminated groundwater upon bioremediation, according to a Microtox test, revealed decreases in the inhibition of the passing of light by the BS column and BS + BA column of 38% and 63%, respectively. These results reveal that combining BS with BA can reduce the biotoxicity of sulfolane. The column tests confirmed the most effective added bacterium in BA, the operating conditions for high-efficiency bioremediation, and possible problems in its future application. The results provide an important reference for the design of methods for the remediation of contaminated sites.
Collapse
Affiliation(s)
- Shih-Hsien Chang
- Department of Public Health, Chung-Shan Medical University, Taichung, 402, Taiwan, ROC; Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan, ROC
| | - Cheng-Fang Wu
- Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, 64002, Taiwan, ROC
| | - Chu-Fang Yang
- Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, 64002, Taiwan, ROC
| | - Chi-Wen Lin
- Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, 64002, Taiwan, ROC; National Yunlin University of Science and Technology, Feng Tay Distinguished Professor, Taiwan.
| |
Collapse
|
3
|
Kuyukina MS, Ivshina IB. Bioremediation of Contaminated Environments Using Rhodococcus. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-11461-9_9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Seifan M, Berenjian A. Application of microbially induced calcium carbonate precipitation in designing bio self-healing concrete. World J Microbiol Biotechnol 2018; 34:168. [PMID: 30387067 DOI: 10.1007/s11274-018-2552-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/29/2018] [Indexed: 12/25/2022]
Abstract
Concrete is one of the most broadly used construction materials in the world due to its number of performance characteristics. Despite the long life of concrete structure under ideal conditions, it tends to crack and this phenomenon results in a considerable reduction in service life and performance. Evidence of microbial involvement in the precipitation of minerals has led to a massive investigation on adapting this technology for addressing the concrete cracking issue. Calcium carbonate is one of most compatible materials with the concrete constituents and it can be induced via biological process. In this review paper, the effects of different factors, such as nucleation site, pH, nutrient and temperature, on the biosynthesis of calcium carbonate are elucidated. Moreover, the influences of effective factors on calcium carbonate polymorphism are extensively elaborated. Finally, the limitations for the future application of this innovative technology in construction industry are highlighted.
Collapse
Affiliation(s)
- Mostafa Seifan
- School of Engineering, Faculty of Science and Engineering, The University of Waikato, Hamilton, New Zealand
| | - Aydin Berenjian
- School of Engineering, Faculty of Science and Engineering, The University of Waikato, Hamilton, New Zealand.
| |
Collapse
|
5
|
Marchesi M, Alberti L, Shouakar-Stash O, Pietrini I, de Ferra F, Carpani G, Aravena R, Franzetti A, Stella T. 37Cl-compound specific isotope analysis and assessment of functional genes for monitoring monochlorobenzene (MCB) biodegradation under aerobic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:784-793. [PMID: 29161603 DOI: 10.1016/j.scitotenv.2017.11.150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/13/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
A laboratory approach was adopted in this study to explore the potential of 37Cl-CSIA in combination with 13C-CSIA and Biological Molecular Tools (BMTs) to estimate the occurrence of monochloroenzene (MCB) aerobic biodegradation. A new analytical method for 37Cl-CSIA of MCB was developed in this study. This methodology using a GC-IRMS allowed to determine δ37Cl values within an internal error of ±0.3‰. Samples from a heavily MCB contaminated site were collected and MCB aerobic biodegradation microcosms with indigenous cultures in natural and enhanced conditions were set up. The microcosms data show a negligible fractionation for 13C associated to MCB mass decrease of >95% over the incubation time. Conversely, an enrichment factor of -0.6±0.1‰ was estimated for 37Cl, which is a reflection of a secondary isotope effect. Moreover, the dual isotope approach showed a pattern for aerobic degradation which differ from the theoretical trend for reductive dehalogenation. Quantitative Polymerase Chain Reaction (qPCR) results showed a significant increase in todC gene copy number with respect to its initial levels for both natural attenuation and biostimulated microcosms, suggesting its involvement in the MCB aerobic degradation, whereas phe gene copy number increased only in the biostimulated ones. Indeed, 37Cl fractionation in combination with the dual carbon‑chlorine isotope approach and the todC gene copy number represent valuable indicators for a qualitative assessment of MCB aerobic biodegradation in the field.
Collapse
Affiliation(s)
- Massimo Marchesi
- Politecnico di Milano, Department of Civil and Environmental Engineering, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
| | - Luca Alberti
- Politecnico di Milano, Department of Civil and Environmental Engineering, Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
| | - Orfan Shouakar-Stash
- Department of Earth and Environmental Sciences, University of Waterloo, 200 University Ave. West, Waterloo N2L 3G1, Canada; Isotope Tracer Technologies Inc., Waterloo N2V 1Z5, Ontario, Canada
| | - Ilaria Pietrini
- Politecnico di Milano, Department of Civil and Environmental Engineering, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
| | - Francesca de Ferra
- Research Center for Non-Conventional Energy, Istituto Eni Donegani Environmental Technologies, via Maritano 26, 20097 San Donato Milanese, Milan, Italy
| | - Giovanna Carpani
- Research Center for Non-Conventional Energy, Istituto Eni Donegani Environmental Technologies, via Maritano 26, 20097 San Donato Milanese, Milan, Italy
| | - Ramon Aravena
- Department of Earth and Environmental Sciences, University of Waterloo, 200 University Ave. West, Waterloo N2L 3G1, Canada
| | - Andrea Franzetti
- University of Milano-Bicocca, Department of Earth and Environmental Sciences, Piazza della Scienza, 1, 20126 Milan, Italy
| | - Tatiana Stella
- University of Milano-Bicocca, Department of Earth and Environmental Sciences, Piazza della Scienza, 1, 20126 Milan, Italy
| |
Collapse
|
6
|
Nijenhuis I, Stollberg R, Lechner U. Anaerobic microbial dehalogenation and its key players in the contaminated Bitterfeld-Wolfen megasite. FEMS Microbiol Ecol 2018; 94:4828323. [PMID: 29385441 DOI: 10.1093/femsec/fiy012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 01/25/2018] [Indexed: 11/14/2022] Open
Abstract
The megasite Bitterfeld-Wolfen is highly contaminated as a result of accidents and because of dumping of wastes from local chemical industries in the last century. A variety of contaminants including chlorinated ethenes and benzenes, hexachlorohexanes and chlorinated dioxins can still be found in the groundwater and (river) sediments. Investigations of the in situ microbial transformation of organohalides have been performed only over the last two decades at this megasite. In this review, we summarise the research on the activity of anaerobic dehalogenating bacteria at the field site in Bitterfeld-Wolfen, focusing on chlorinated ethenes, monochlorobenzene and chlorinated dioxins. Various methods and concepts were applied including ex situ cultivation and isolation, and in situ analysis of hydrochemical parameters, compound-specific stable isotope analysis of contaminants, 13C-tracer studies and molecular markers. Overall, biotransformation of organohalides is ongoing at the field site and Dehalococcoides mccartyi species play an important role in the detoxification process in the Bitterfeld-Wolfen region.
Collapse
Affiliation(s)
- Ivonne Nijenhuis
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Reiner Stollberg
- Department of Groundwater Remediation, Helmholtz Centre for Environmental Research-UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Ute Lechner
- Institute of Biology/Microbiology Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle, Germany
| |
Collapse
|
7
|
Qiao W, Luo F, Lomheim L, Mack EE, Ye S, Wu J, Edwards EA. Natural Attenuation and Anaerobic Benzene Detoxification Processes at a Chlorobenzene-Contaminated Industrial Site Inferred from Field Investigations and Microcosm Studies. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:22-31. [PMID: 29178800 DOI: 10.1021/acs.est.7b04145] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A five-year site investigation was conducted at a former chemical plant in Nanjing, China. The main contaminants were 1,2,4-trichlorobenzene (TCB) reaching concentrations up to 7300 μg/L, dichlorobenzene (DCB) isomers, monochlorobenzene (MCB), and benzene. Over time, these contaminants naturally attenuated to below regulatory levels under anaerobic conditions. To confirm the transformation processes and to explore the mechanisms, a corresponding laboratory microcosm study was completed demonstrating that 1,2,4-TCB was dechlorinated to 1,2-DCB, 1,3-DCB, and 1,4-DCB in approximately 2%/10%/88% molar proportions. The DCB isomers were dechlorinated via MCB to benzene, and, finally, benzene was degraded under prevailing sulfate-reducing conditions. Dechlorination could not be attributed to known dechlorinators Dehalobacter or Dehalococcoides, while anaerobic benzene degradation was mediated by microbes affiliated to a Deltaproteobacterium ORM2, previously associated with this activity. Unidentified organic compounds, possibly aromatic compounds related to past on-site production processes, were fueling the dechlorination reactions in situ. The microcosm study confirmed transformation processes inferred from field data and provided needed assurance for natural attenuation. Activity-based microcosm studies are often omitted from site characterization in favor of rapid and less expensive molecular surveys. However, the value of microcosm studies for confirming transformation processes, establishing electron balances, assessing cocontaminant inhibition, and validating appropriate monitoring tools is clear. At complex sites impacted by multiple compounds with poorly characterized transformation mechanisms, activity assays provide valuable data to incorporate into the conceptual site model to most effectively inform remediation alternatives.
Collapse
Affiliation(s)
- Wenjing Qiao
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University , Nanjing 210046, China
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto M5S 3E5, Canada
| | - Fei Luo
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto M5S 3E5, Canada
| | - Line Lomheim
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto M5S 3E5, Canada
| | - Elizabeth Erin Mack
- DuPont Corporate Remediation Group , Wilmington, Delaware 19805, United States
| | - Shujun Ye
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University , Nanjing 210046, China
| | - Jichun Wu
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University , Nanjing 210046, China
| | - Elizabeth A Edwards
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto M5S 3E5, Canada
| |
Collapse
|
8
|
Lhotský O, Krákorová E, Linhartová L, Křesinová Z, Steinová J, Dvořák L, Rodsand T, Filipová A, Kroupová K, Wimmerová L, Kukačka J, Cajthaml T. Assessment of biodegradation potential at a site contaminated by a mixture of BTEX, chlorinated pollutants and pharmaceuticals using passive sampling methods - Case study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:1451-1465. [PMID: 28763941 DOI: 10.1016/j.scitotenv.2017.06.193] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 06/07/2023]
Abstract
The present study describes a pilot remediation test of a co-mingled plume containing BTEX, chlorinated pollutants and pharmaceuticals. Remediation was attempted using a combination of various approaches, including a pump and treat system applying an advanced oxidation process and targeted direct push injections of calcium peroxide. The remediation process was monitored intensively and extensively throughout the pilot test using various conventional and passive sampling methods, including next-generation amplicon sequencing. The results showed that the injection of oxygen-saturated treated water with residual hydrogen peroxide and elevated temperature enhanced the in situ removal of monoaromatics and chlorinated pollutants. In particular, in combination with the injection of calcium peroxide, the conditions facilitated the in situ bacterial biodegradation of the pollutants. The mean groundwater concentration of benzene decreased from 1349μg·L-1 prior to the test to 3μg·L-1 within 3months after the calcium peroxide injections; additionally, monochlorobenzene decreased from 1545μg·L-1 to 36μg·L-1, and toluene decreased from 143μg·L-1 to 2μg·L-1. Furthermore, significant degradation of the contaminants bound to the soil matrix in less permeable zones was observed. Based on a developed 3D model, 90% of toluene and 88% of chlorobenzene bound to the soil were removed during the pilot test, and benzene was removed almost completely. On the other hand, the psychopharmaceuticals were effectively removed by the employed advanced oxidation process only from the treated water, and their concentration in groundwater remained stagnant due to inflow from the surroundings and their absence of in situ degradation. The employment of passive sampling techniques, including passive diffusion bags (PDB) for volatile organic pollutants and their respective transformation products, polar organic compound integrative samplers (POCIS) for the pharmaceuticals and in situ soil microcosms for microbial community analysis, was proven to be suitable for monitoring remediation in saturated zones.
Collapse
Affiliation(s)
- Ondřej Lhotský
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic
| | - Eva Krákorová
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Lucie Linhartová
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Zdena Křesinová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Jana Steinová
- Technical University of Liberec, Studentská 2, CZ-461 17 Liberec, Czech Republic
| | - Lukáš Dvořák
- Technical University of Liberec, Studentská 2, CZ-461 17 Liberec, Czech Republic
| | - Torgeir Rodsand
- ALS Laboratory Group Norway AS, Drammensveien 173, N-0214 Oslo, Norway
| | - Alena Filipová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic
| | - Kristýna Kroupová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic
| | - Lenka Wimmerová
- ALS Laboratory Group Norway AS, Drammensveien 173, N-0214 Oslo, Norway; Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 00 Prague 6, Czech Republic
| | - Jan Kukačka
- DEKONTA a.s., Volutová 2523, CZ-158 00 Prague 5, Czech Republic
| | - Tomáš Cajthaml
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20 Prague 4, Czech Republic.
| |
Collapse
|
9
|
Seifan M, Samani AK, Berenjian A. A novel approach to accelerate bacterially induced calcium carbonate precipitation using oxygen releasing compounds (ORCs). BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.10.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Lu S, Zhang X, Xue Y. Application of calcium peroxide in water and soil treatment: A review. JOURNAL OF HAZARDOUS MATERIALS 2017; 337:163-177. [PMID: 28525879 DOI: 10.1016/j.jhazmat.2017.04.064] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/31/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Calcium peroxide (CP) has been progressively applied in terms of environmental protection due to its certain physical and chemical properties. This review focuses on the latest progresses in the applications of CP in water and soil treatment, including wastewater treatment, surface water restoration and groundwater and soil remediation. The stability of CP makes it an effective solid phase to supply H2O2 and O2 for aerobic biodegradation and chemical degradation of contaminants in water and soil. CP has exerted great performance in the removal of dyes, chlorinated hydrocarbons, petroleum hydrocarbons, pesticides, heavy metals and various other contaminants. The research progress in the encapsulation technologies of CP with other materials and the preparation of CP nanoparticles were also presented in this review. Based on the summarized research progresses, the perspective of CP application in the future was proposed.
Collapse
Affiliation(s)
- Shuguang Lu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
| | - Xiang Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Yunfei Xue
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| |
Collapse
|
11
|
Verardo E, Atteia O, Prommer H. Elucidating the fate of a mixed toluene, DHM, methanol, and i-propanol plume during in situ bioremediation. JOURNAL OF CONTAMINANT HYDROLOGY 2017; 201:6-18. [PMID: 28433208 DOI: 10.1016/j.jconhyd.2017.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 04/04/2017] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
Organic pollutants such as solvents or petroleum products are widespread contaminants in soil and groundwater systems. In-situ bioremediation is a commonly used remediation technology to clean up the subsurface to eliminate the risks of toxic substances to reach potential receptors in surface waters or drinking water wells. This study discusses the development of a subsurface model to analyse the performance of an actively operating field-scale enhanced bioremediation scheme. The study site was affected by a mixed toluene, dihydromyrcenol (DHM), methanol, and i-propanol plume. A high-resolution, time-series of data was used to constrain the model development and calibration. The analysis shows that the observed failure of the treatment system is linked to an inefficient oxygen injection pattern. Moreover, the model simulations also suggest that additional contaminant spillages have occurred in 2012. Those additional spillages and their associated additional oxygen demand resulted in a significant increase in contaminant fluxes that remained untreated. The study emphasises the important role that reactive transport modelling can play in data analyses and for enhancing remediation efficiency.
Collapse
Affiliation(s)
- E Verardo
- ENSEGID, EA4592 G&E, 1 allée Daguin, 33607, Pessac, France.
| | - O Atteia
- ENSEGID, EA4592 G&E, 1 allée Daguin, 33607, Pessac, France
| | - H Prommer
- CSIRO Land and Water, Private Bag No. 5, Wembley, WA 6913, Australia; School of Earth Sciences, University of Western Australia, 35 Stirling Hwy, Nedlands, WA 6009, Australia; National Centre for Groundwater Research and Training (NCGRT), Flinders University, Adelaide, GPO Box 2100, SA 5001, Australia
| |
Collapse
|
12
|
Moghadam MJ, Moayedi H, Sadeghi MM, Hajiannia A. A review of combinations of electrokinetic applications. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2016; 38:1217-1227. [PMID: 26780262 DOI: 10.1007/s10653-016-9795-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
Anthropogenic activities contaminate many lands and underground waters with dangerous materials. Although polluted soils occupy small parts of the land, the risk they pose to plants, animals, humans, and groundwater is too high. Remediation technologies have been used for many years in order to mitigate pollution or remove pollutants from soils. However, there are some deficiencies in the remediation in complex site conditions such as low permeability and complex composition of some clays or heterogeneous subsurface conditions. Electrokinetic is an effective method in which electrodes are embedded in polluted soil, usually vertically but in some cases horizontally, and a low direct current voltage gradient is applied between the electrodes. The electric gradient initiates movement of contaminants by electromigration (charged chemical movement), electro-osmosis (movement of fluid), electrolysis (chemical reactions due to the electric field), and diffusion. However, sites that are contaminated with heavy metals or mixed contaminants (e.g. a combination of organic compounds with heavy metals and/or radionuclides) are difficult to remediate. There is no technology that can achieve the best results, but combining electrokinetic with other remediation methods, such as bioremediation and geosynthetics, promises to be the most effective method so far. This review focuses on the factors that affect electrokinetic remediation and the state-of-the-art methods that can be combined with electrokinetic.
Collapse
Affiliation(s)
| | - Hossein Moayedi
- Department of Civil Engineering, Kermanshah University of Technology, Kermanshah, Iran
| | | | - Alborz Hajiannia
- Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
| |
Collapse
|
13
|
Berthold T, Centler F, Hübschmann T, Remer R, Thullner M, Harms H, Wick LY. Mycelia as a focal point for horizontal gene transfer among soil bacteria. Sci Rep 2016; 6:36390. [PMID: 27811990 PMCID: PMC5095653 DOI: 10.1038/srep36390] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 10/12/2016] [Indexed: 11/09/2022] Open
Abstract
Horizontal gene transfer (HGT) is a main mechanism of bacterial evolution endowing bacteria with new genetic traits. The transfer of mobile genetic elements such as plasmids (conjugation) requires the close proximity of cells. HGT between genetically distinct bacteria largely depends on cell movement in water films, which are typically discontinuous in natural systems like soil. Using laboratory microcosms, a bacterial reporter system and flow cytometry, we here investigated if and to which degree mycelial networks facilitate contact of and HGT between spatially separated bacteria. Our study shows that the network structures of mycelia promote bacterial HGT by providing continuous liquid films in which bacterial migration and contacts are favoured. This finding was confirmed by individual-based simulations, revealing that the tendency of migrating bacteria to concentrate in the liquid film around hyphae is a key factor for improved HGT along mycelial networks. Given their ubiquity, we propose that hyphae can act as focal point for HGT and genetic adaptation in soil.
Collapse
Affiliation(s)
- Tom Berthold
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Florian Centler
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Thomas Hübschmann
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Rita Remer
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Martin Thullner
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Hauke Harms
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5E, 04103 Leipzig, Germany
| | - Lukas Y. Wick
- Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Permoserstraße 15, 04318, Leipzig, Germany
| |
Collapse
|
14
|
Shekoohiyan S, Moussavi G, Naddafi K. The peroxidase-mediated biodegradation of petroleum hydrocarbons in a H2O2-induced SBR using in-situ production of peroxidase: Biodegradation experiments and bacterial identification. JOURNAL OF HAZARDOUS MATERIALS 2016; 313:170-178. [PMID: 27060866 DOI: 10.1016/j.jhazmat.2016.03.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 03/26/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
A bacterial peroxidase-mediated oxidizing process was developed for biodegrading total petroleum hydrocarbons (TPH) in a sequencing batch reactor (SBR). Almost complete biodegradation (>99%) of high TPH concentrations (4g/L) was attained in the bioreactor with a low amount (0.6mM) of H2O2 at a reaction time of 22h. A specific TPH biodegradation rate as high as 44.3mgTPH/gbiomass×h was obtained with this process. The reaction times required for complete biodegradation of TPH concentrations of 1, 2, 3, and 4g/L were 21, 22, 28, and 30h, respectively. The catalytic activity of hydrocarbon catalyzing peroxidase was determined to be 1.48U/mL biomass. The biodegradation of TPH in seawater was similar to that in fresh media (no salt). A mixture of bacteria capable of peroxidase synthesis and hydrocarbon biodegradation including Pseudomonas spp. and Bacillus spp. were identified in the bioreactor. The GC/MS analysis of the effluent indicated that all classes of hydrocarbons could be well-degraded in the H2O2-induced SBR. Accordingly, the peroxidase-mediated process is a promising method for efficiently biodegrading concentrated TPH-laden saline wastewater.
Collapse
Affiliation(s)
- Sakine Shekoohiyan
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Gholamreza Moussavi
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Kazem Naddafi
- Department of Environmental Health Engineering, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
15
|
Mena Ramírez E, Villaseñor Camacho J, Rodrigo Rodrigo MA, Cañizares Cañizares P. Feasibility of electrokinetic oxygen supply for soil bioremediation purposes. CHEMOSPHERE 2014; 117:382-387. [PMID: 25173714 DOI: 10.1016/j.chemosphere.2014.07.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 07/21/2014] [Accepted: 07/23/2014] [Indexed: 06/03/2023]
Abstract
This paper studies the possibility of providing oxygen to a soil by an electrokinetic technique, so that the method could be used in future aerobic polluted soil bioremediation treatments. The oxygen was generated from the anodic reaction of water electrolysis and transported to the soil in a laboratory-scale electrokinetic cell. Two variables were tested: the soil texture and the voltage gradient. The technique was tested in two artificial soils (clay and sand) and later in a real silty soil, and three voltage gradients were used: 0.0 (control), 0.5, and 1.0 V cm(-1). It was observed that these two variables strongly influenced the results. Oxygen transport into the soil was only available in the silty and sandy soils by oxygen diffusion, obtaining high dissolved oxygen concentrations, between 4 and 9 mg L(-1), useful for possible aerobic biodegradation processes, while transport was not possible in fine-grained soils such as clay. Electro-osmotic flow did not contribute to the transport of oxygen, and an increase in voltage gradients produced higher oxygen transfer rates. However, only a minimum fraction of the electrolytically generated oxygen was efficiently used, and the maximum oxygen transport rate observed, approximately 1.4 mgO2 L(-1)d(-1), was rather low, so this technique could be only tested in slow in-situ biostimulation processes for organics removal from polluted soils.
Collapse
Affiliation(s)
- E Mena Ramírez
- Chemical Engineering Department, Institute for Chemical and Environmental Technology (ITQUIMA), University of Castilla-La Mancha, Avenida Camilo José Cela s/n 13071, Ciudad Real, Spain
| | - J Villaseñor Camacho
- Chemical Engineering Department, Institute for Chemical and Environmental Technology (ITQUIMA), University of Castilla-La Mancha, Avenida Camilo José Cela s/n 13071, Ciudad Real, Spain.
| | - M A Rodrigo Rodrigo
- Chemical Engineering Department, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, Avenida Camilo José Cela s/n 13071, Ciudad Real, Spain
| | - P Cañizares Cañizares
- Chemical Engineering Department, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, Avenida Camilo José Cela s/n 13071, Ciudad Real, Spain
| |
Collapse
|
16
|
Alfreider A, Vogt C. Genetic evidence for bacterial chemolithoautotrophy based on the reductive tricarboxylic acid cycle in groundwater systems. Microbes Environ 2012; 27:209-14. [PMID: 22791056 PMCID: PMC4036008 DOI: 10.1264/jsme2.me11274] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Geologically and chemically distinct aquifers were screened for the presence of two genes coding for key enzymes of the reverse tricarboxylic acid (rTCA) cycle in autotrophic bacteria, 2-oxoglutarate : ferredoxin oxidoreductase (oorA) and the beta subunit of ATP citrate lyase enzymes (aclB). From 42 samples investigated, aclB genes were detected in two and oorA genes in six samples retrieved from polluted and sulfidic aquifers. aclB genes were represented by a single phylotype of almost identical sequences closely affiliated with chemolithoautotrophic Sulfurimonas species. In contrast, sequences analysis of oorA genes revealed diverse phylotypes mainly related to sequences from cultivation-independent studies.
Collapse
Affiliation(s)
- Albin Alfreider
- Institute of Ecology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
| | | |
Collapse
|
17
|
Application of Rhodococcus in Bioremediation of Contaminated Environments. BIOLOGY OF RHODOCOCCUS 2010. [DOI: 10.1007/978-3-642-12937-7_9] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
18
|
Balcke GU, Paschke H, Vogt C, Schirmer M. Pulsed gas injection: a minimum effort approach for enhanced natural attenuation of chlorobenzene in contaminated groundwater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2009; 157:2011-2018. [PMID: 19299054 DOI: 10.1016/j.envpol.2009.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 02/23/2009] [Accepted: 02/24/2009] [Indexed: 05/27/2023]
Abstract
Chlorobenzene-contaminated groundwater was used to assess pulsed gas sparging as a minimum effort aeration strategy to enhance intrinsic natural attenuation. In contrast to existing biosparging operations, oxygen was supplied at minimum rate by reducing the gas injection frequency to 0.33 day(-1). Field tests in a model aquifer were conducted in a 12 m long reactor, filled with indigenous aquifer material and continuously recharged with polluted groundwater over 3 years. The closed arrangement allowed yield balances, cost accounting as well as the investigation of spatial distributions of parameters which are sensitive to the biodegradation process. Depending on the injection frequency and on the gas chosen for injection (pure oxygen or air) oxygen-deficient conditions prevailed in the aquifer. Despite the limiting availability of dissolved oxygen in the groundwater, chlorobenzene degradation under oxygen-deficient conditions proved to be more effective than under conditions with dissolved oxygen being available in high concentrations.
Collapse
Affiliation(s)
- Gerd Ulrich Balcke
- Department of Hydrogeology, UFZ Helmholtz Centre for Environmental Research, Theodor-Lieser-Strasse 4, D-06120 Halle/Saale, Germany.
| | | | | | | |
Collapse
|
19
|
Wan Y, Wang H, Zhao Q, Klingstedt M, Terasaki O, Zhao D. Ordered Mesoporous Pd/Silica−Carbon as a Highly Active Heterogeneous Catalyst for Coupling Reaction of Chlorobenzene in Aqueous Media. J Am Chem Soc 2009; 131:4541-50. [DOI: 10.1021/ja808481g] [Citation(s) in RCA: 321] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ying Wan
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Haiyan Wang
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Qingfei Zhao
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Miia Klingstedt
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Osamu Terasaki
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| | - Dongyuan Zhao
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China, Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden, and Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China
| |
Collapse
|
20
|
Martínková L, Uhnáková B, Pátek M, Nesvera J, Kren V. Biodegradation potential of the genus Rhodococcus. ENVIRONMENT INTERNATIONAL 2009; 35:162-77. [PMID: 18789530 DOI: 10.1016/j.envint.2008.07.018] [Citation(s) in RCA: 284] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2008] [Revised: 07/02/2008] [Accepted: 07/22/2008] [Indexed: 05/24/2023]
Abstract
A large number of aromatic compounds and organic nitriles, the two groups of compounds covered in this review, are intermediates, products, by-products or waste products of the chemical and pharmaceutical industries, agriculture and the processing of fossil fuels. The majority of these synthetic substances (xenobiotics) are toxic and their release and accumulation in the environment pose a serious threat to living organisms. Bioremediation using various bacterial strains of the genus Rhodococcus has proved to be a promising option for the clean-up of polluted sites. The large genomes of rhodococci, their redundant and versatile catabolic pathways, their ability to uptake and metabolize hydrophobic compounds, to form biofilms, to persist in adverse conditions and the availability of recently developed tools for genetic engineering in rhodococci make them suitable industrial microorganisms for biotransformations and the biodegradation of many organic compounds. The peripheral and central catabolic pathways in rhodococci are characterized for each type of aromatics (hydrocarbons, phenols, halogenated, nitroaromatic, and heterocyclic compounds) in this review. Pathways involved in the hydrolysis of nitrile pollutants (aliphatic nitriles, benzonitrile analogues) and the corresponding enzymes (nitrilase, nitrile hydratase) are described in detail. Examples of regulatory mechanisms for the expression of the catabolic genes are given. The strains that efficiently degrade the compounds in question are highlighted and examples of their use in biodegradation processes are presented.
Collapse
Affiliation(s)
- Ludmila Martínková
- Centre of Biocatalysis and Biotransformation, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídenská 1083, CZ-142 20 Prague 4, Czech Republic.
| | | | | | | | | |
Collapse
|
21
|
van Pinxteren MS, Montero L, Jäsch S, Paschke H, Popp P. Headspace sorptive extraction using silicone tubes for the determination of chlorobenzenes in water. Anal Bioanal Chem 2008; 393:767-75. [DOI: 10.1007/s00216-008-2455-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 09/17/2008] [Accepted: 10/02/2008] [Indexed: 11/28/2022]
|
22
|
Dominguez RF, da Silva MLB, McGuire TM, Adamson D, Newell CJ, Alvarez PJJ. Aerobic bioremediation of chlorobenzene source-zone soil in flow-through columns: performance assessment using quantitative PCR. Biodegradation 2007; 19:545-53. [PMID: 17960485 DOI: 10.1007/s10532-007-9160-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Accepted: 10/08/2007] [Indexed: 11/25/2022]
Abstract
Flow-through aquifer columns were operated for 12 weeks to evaluate the benefits of aerobic biostimulation for the bioremediation of source-zone soil contaminated with chlorobenzenes (CBs). Quantitative Polymerase Chain Reaction (qPCR) was used to measure the concentration of total bacteria (16S rRNA gene) and oxygenase genes involved in the biodegradation of aromatic compounds (i.e., toluene dioxygenase, ring hydroxylating monooxygenase, naphthalene dioxygenase, phenol hydroxylase, and biphenyl dioxygenase). Monochlorobenzene, which is much more soluble than dichlorobenzenes, was primarily removed by flushing, and biostimulation showed little benefit. In contrast, dichlorobenzene removal was primarily due to biodegradation, and the removal efficiency was much higher in oxygen-amended columns compared to a control column. To our knowledge, this is the first report that oxygen addition can enhance CB source-zone soil bioremediation. Analysis by qPCR showed that whereas the biphenyl and toluene dioxygenase biomarkers were most abundant, increases in the concentration of the phenol hydroxylase gene reflected best the higher dichlorobenzene removal due to aerobic biostimulation. This suggests that quantitative molecular microbial ecology techniques could be useful to assess CB source-zone bioremediation performance.
Collapse
Affiliation(s)
- Rosa F Dominguez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | | | | | | | | | | |
Collapse
|
23
|
Balcke GU, Wegener S, Kiesel B, Benndorf D, Schlömann M, Vogt C. Kinetics of chlorobenzene biodegradation under reduced oxygen levels. Biodegradation 2007; 19:507-18. [DOI: 10.1007/s10532-007-9156-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Accepted: 10/01/2007] [Indexed: 11/30/2022]
|
24
|
Field JA, Sierra-Alvarez R. Microbial degradation of chlorinated benzenes. Biodegradation 2007; 19:463-80. [PMID: 17917704 DOI: 10.1007/s10532-007-9155-1] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Accepted: 09/21/2007] [Indexed: 11/30/2022]
Abstract
Chlorinated benzenes are important industrial intermediates and solvents. Their widespread use has resulted in broad distribution of these compounds in the environment. Chlorobenzenes (CBs) are subject to both aerobic and anaerobic metabolism. Under aerobic conditions, CBs with four or less chlorine groups are susceptible to oxidation by aerobic bacteria, including bacteria (Burkholderia, Pseudomonas, etc.) that grow on such compounds as the sole source of carbon and energy. Sound evidence for the mineralization of CBs has been provided based on stoichiometric release of chloride or mineralization of (14)C-labeled CBs to (14)CO(2). The degradative attack of CBs by these strains is initiated with dioxygenases eventually yielding chlorocatechols as intermediates in a pathway leading to CO(2) and chloride. Higher CBs are readily reductively dehalogenated to lower chlorinated benzenes in anaerobic environments. Halorespiring bacteria from the genus Dehalococcoides are implicated in this conversion. Lower chlorinated benzenes are less readily converted, and mono-chlorinated benzene is recalcitrant to biotransformation under anaerobic conditions.
Collapse
Affiliation(s)
- Jim A Field
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA.
| | | |
Collapse
|
25
|
Benndorf D, Balcke GU, Harms H, von Bergen M. Functional metaproteome analysis of protein extracts from contaminated soil and groundwater. ISME JOURNAL 2007; 1:224-34. [DOI: 10.1038/ismej.2007.39] [Citation(s) in RCA: 219] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
26
|
Nestler H, Kiesel B, Kaschabek SR, Mau M, Schlömann M, Balcke GU. Biodegradation of chlorobenzene under hypoxic and mixed hypoxic-denitrifying conditions. Biodegradation 2007; 18:755-67. [PMID: 17279449 DOI: 10.1007/s10532-007-9104-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 01/16/2007] [Indexed: 10/23/2022]
Abstract
Pseudomonas veronii strain UFZ B549, Acidovorax facilis strain UFZ B530, and a community of indigenous groundwater bacteria, adapted to oxygen limitation, were cultivated on chlorobenzene and its metabolites 2-chloro-cis,cis-muconate and acetate/succinate under hypoxic and denitrifying conditions. Highly sensitive approaches were used to maintain defined low oxygen partial pressures in an oxygen-re-supplying headspace. With low amounts of oxygen available all cultures converted chlorobenzene, though the pure strains accumulated 3-chlorocatechol and 2-chloro-cis,cis-muconate as intermediates. Under strictly anoxic conditions no chlorobenzene transformation was observed, while 2-chloro-cis,cis-muconate, the fission product of oxidative ring cleavage, was readily degraded by the investigated chlorobenzene-degrading cultures at the expense of nitrate as terminal electron acceptor. Hence, we conclude that oxygen is an obligatory reactant for initial activation of chlorobenzene and fission of the aromatic ring, but it can be partially replaced by nitrate in respiration. The tendency to denitrify in the presence of oxygen during growth on chlorobenzene appeared to depend on the oxygen availability and the efficiency to metabolize chlorobenzene under oxygen limitation, which is largely regulated by the activity of the intradiol ring fission dioxygenase. Permanent cultivation of a groundwater consortium under reduced oxygen levels resulted in enrichment of a community almost exclusively composed of members of the beta-Proteobacteria and Bacteroidetes. Thus, it is deduced that these strains can still maintain high activities of oxygen-requiring enzymes that allow for efficient CB transformation under hypoxic conditions.
Collapse
Affiliation(s)
- Holger Nestler
- Department of Hydrogeology, Helmholtz Centre for Environmental Research-UFZ, Theodor-Lieser-Strasse 4, D-06120 Halle (Saale), Germany.
| | | | | | | | | | | |
Collapse
|
27
|
Liu SJ, Jiang B, Huang GQ, Li XG. Laboratory column study for remediation of MTBE-contaminated groundwater using a biological two-layer permeable barrier. WATER RESEARCH 2006; 40:3401-8. [PMID: 16962157 DOI: 10.1016/j.watres.2006.07.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 06/26/2006] [Accepted: 07/16/2006] [Indexed: 05/11/2023]
Abstract
In this study, an in situ biological two-layer permeable reactive barrier system consisting of an oxygen-releasing material layer followed by a biodegradation layer was designed to evaluate the remediation effectiveness of MTBE-contaminated groundwater. The first layer containing calcium peroxide (CaO(2)) and other inorganic salts is to provide oxygen and nutrients for the immobilized microbes in the second layer in order to keep them in aerobic condition and maintain their normal metabolism. Furthermore, inorganic salts such as potassium dihydrogen phosphate (KH(2)PO(4)) and ammonium sulphate ((NH(4))(2)SO(4)) can also decrease the high pH caused by the alkali salt degraded from CaO(2). The second layer using granular expanded perlite as microbial carrier is able to biodegrade MTBE entering the barrier system. Batch experiments were conducted to identify the appropriate components of oxygen-releasing materials and the optimum pH value for the biodegradation of MTBE. At pH=8.0, the biodegradation efficiency of MTBE is the maximum and approximately 48.9%. A laboratory-scale experiment using two continuous upflow stainless-steel columns was then performed to evaluate the feasibility of this designed system. The fist column was filled with oxygen-releasing materials at certain ratio by weight. The second column was filled with expanded perlite granules immobilizing MTBE-degrading microbial consortium. Simulated MTBE-contaminated groundwater, in which dissolved oxygen (DO) content was 0mg/L, was pumped into this system at a flow rate of 500mL/d. Samples from the second column were analyzed for MTBE and its major degradation byproduct. Results showed that MTBE could be removed, and its metabolic intermediate, tert-butyl alcohol (TBA), could also be further degraded in this passive system.
Collapse
Affiliation(s)
- She-Jiang Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | | | | | | |
Collapse
|