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Lu Y, Liang F, Qin F, Zhong L, Jiang J, Liu Q, Zhang S, Yan M, Fan C, Dong H. Tourmaline guiding the electric field and dechlorination pathway of 2,3-dichlorophenol by Desulfitobacterium hafniense. J Environ Sci (China) 2024; 135:262-273. [PMID: 37778802 DOI: 10.1016/j.jes.2022.12.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 10/03/2023]
Abstract
The dehalogenation of organohalides has been a research hotspot in bioremediation field; however, the influence of tourmaline, a natural ore that can generate spontaneous electric field, on organohalide-respiring bacteria (OHRB) and their dechlorination process is not well known. In this study, the effect and mechanism of tourmaline on the reductive dechlorination of 2,3-dichlorophenol (2,3-DCP) by Desulfitobacterium hafniense DCB-2T were explored. The characterization results confirmed that tourmaline had good stability and the optimal dosage of tourmaline was 2.5 g/L, which shortened the total time required for dechlorination reaction to 72 hr. Besides, tourmaline amendment also increased the proportion of 2-chlorophenol (2-CP) from 18% to 30% of end products, while that of 3-CP decreased correspondingly. The theoretical calculations showed that the bond charge of the ortho-substituted chlorine declined from -0.179 to -0.067, and that of meta-substituted chlorine increased from -0.111 to -0.129, which indicated that the spontaneous electric field of tourmaline affected the charge distribution of 2,3-DCP and was more conducive to the generation of 2-CP. Overall, tourmaline with the spontaneous electric field affected the reductive dechlorination pathway of Desulfitobacterium,and the tourmaline-OHRB combining system might serve as a novel strategy for the bioremediation of environments polluted with chlorinated phenols.
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Affiliation(s)
- Yue Lu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China.
| | - Fangyi Liang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China
| | - Fanzhi Qin
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China
| | - Linrui Zhong
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China
| | - Jianhong Jiang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410007, China; Hunan Engineering Research Center for Water Treatment Process & Equipment, Changsha 410007, China
| | - Qi Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China
| | - Shoujuan Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China; Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China
| | - Ming Yan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China
| | - Changzheng Fan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China
| | - Haoran Dong
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Shenzhen Research Institute, Hunan Univerisy, Shenzhen 510082, China
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Capozzi SL, Rodenburg LA, Krumins V, Fennell DE, Mack EE. Using positive matrix factorization to investigate microbial dehalogenation of chlorinated benzenes in groundwater at a historically contaminated site. CHEMOSPHERE 2018; 211:515-523. [PMID: 30086528 DOI: 10.1016/j.chemosphere.2018.07.180] [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: 05/14/2018] [Revised: 07/26/2018] [Accepted: 07/29/2018] [Indexed: 06/08/2023]
Abstract
Chlorinated benzenes are common groundwater contaminants in the United States, so demonstrating whether they undergo degradation in the subsurface is important in determining the best remedy for this contamination. The purpose of this work was to use a new data mining approach to investigate chlorinated benzene degradation pathways in the subsurface. Positive Matrix Factorization (PMF) was used to analyze long-term measurements of chlorinated benzene concentrations in groundwater at a contaminated site in New Jersey. A dataset containing 597 groundwater samples and 5 chlorinated benzenes and benzene collected from 144 wells over 20 years was investigated using PMF2 software. Despite the heterogeneity of this dataset, PMF analysis revealed patterns indicative of microbial dechlorination in the groundwater and provided insight about where dechlorination is occurring, to what extent, and under which geochemical conditions. PMF resolved a factor indicative of a source of 1,2,4-trichlorobenzene and 1,2-dichlorobenzene and two factors representing stages of dechlorination, one more advanced than the other. The PMF results indicated that virtually all of the 1,2-dichlorobenzene at the site arises from its use onsite, not from the dechlorination of trichlorobenzenes. Factors were further interpreted using ancillary data such as geochemical indicators and field parameters also measured in the samples. Analysis suggested that the partial and advanced dechlorination signals occur under different subsurface physical conditions. The results provided field validation of the current understanding of anaerobic dechlorination of chlorinated benzenes in the subsurface developed from laboratory studies. PMF is thereby shown to be a useful tool for investigating chlorinated benzene dechlorination.
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Affiliation(s)
- Staci L Capozzi
- Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, United States.
| | - Lisa A Rodenburg
- Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, United States
| | - Valdis Krumins
- Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, United States
| | - Donna E Fennell
- Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, United States
| | - E Erin Mack
- Corporate Remediation Group, E. I. DuPont de Nemours and Company, Wilmington, DE, 19805, United States
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