Anaerobic biotransformation of hexachlorocyclohexane isomers by Dehalococcoides species and an enrichment culture

Bashir, Safdar; Kuntze, Kevin; Vogt, Carsten; Nijenhuis, Ivonne

doi:10.1007/s10532-018-9838-9

Cited by 31 publications

(21 citation statements)

References 44 publications

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“…Several studies reported that the microbial anaerobic degradation of lindane is different from aerobic degradation (Endo et al, 2005;Bashir et al, 2018). Dichloro-elimination and dehydrochlorination appear to be the main processes during the transformation of lindane via tetrachlorocyclohexene (TCCH) into lower chlorinated products under the anoxic conditions of aquifer sediments (Lal et al, 2010).…”

Section: Anaerobic Degradationmentioning

confidence: 99%

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

et al. 2020

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Lindane (γ-hexachlorocyclohexane) is an organochlorine pesticide that has been widely used in agriculture over the last seven decades. The increasing residues of lindane in soil and water environments are toxic to humans and other organisms. Large-scale applications and residual toxicity in the environment require urgent lindane removal. Microbes, particularly Gram-negative bacteria, can transform lindane into non-toxic and environmentally safe metabolites. Aerobic and anaerobic microorganisms follow different metabolic pathways to degrade lindane. A variety of enzymes participate in lindane degradation pathways, including dehydrochlorinase (LinA), dehalogenase (LinB), dehydrogenase (LinC), and reductive dechlorinase (LinD). However, a limited number of reviews have been published regarding the biodegradation and bioremediation of lindane. This review summarizes the current knowledge regarding lindane-degrading microbes along with biodegradation mechanisms, metabolic pathways, and the microbial remediation of lindane-contaminated environments. The prospects of novel bioremediation technologies to provide insight between laboratory cultures and largescale applications are also discussed. This review provides a theoretical foundation and practical basis to use lindane-degrading microorganisms for bioremediation.

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Section: Anaerobic Degradationmentioning

confidence: 99%

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

et al. 2020

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“…and Sphingobium sp. in batch experiments 32,33 and landscape level in the groundwater in Bitterfeld. 34 Recently, CSIA was successfully applied to characterize the transformation of HCHs in garden soil− plant and hydroponic systems.…”

Section: ■ Introductionmentioning

confidence: 99%

Soil from a Hexachlorocyclohexane Contaminated Field Site Inoculates Wheat in a Pot Experiment to Facilitate the Microbial Transformation of β-Hexachlorocyclohexane Examined by Compound-Specific Isotope Analysis

Liu

Kümmel

et al. 2021

Environ. Sci. Technol.

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β-Hexachlorocyclohexane (β-HCH) is a remnant from former HCH pesticide production. Its removal from the environment gained attention in the last few years since it is the most stable HCH isomer. However, knowledge about the transformation of β-HCH in soil− plant systems is still limited. Therefore, experiments with a contaminated field soil were conducted to investigate the transformation of β-HCH in soil−plant systems by compound specific isotope analysis (CSIA). The results showed that the δ 13 C and δ 37 Cl values of β-HCH in the soil of the planted control remained stable, revealing no transformation due to a low bioavailability. Remarkably, an increase of the δ 13 C and δ 37 Cl values in soil and plant tissues of the spiked treatments were observed, indicating the transformation of β-HCH in both the soil and the plant. This was surprising as previously it was shown that wheat is unable to transform β-HCH when growing in hydroponic culture or garden soil. Thus, results of this work indicate for the first time that a microbial community of the soil inoculated the wheat and then facilitated the transformation of β-HCH in the wheat, which may have implications for the development of phytoremediation concepts. A high abundance of HCH degraders belonging to Sphingomonas sp., Mycobacterium sp., and others was detected in the β-HCH-treated bulk and rhizosphere soil, potentially supporting the biotransformation.

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“…Of the currently-characterized OHRB, Dehalococcoides represents a unique lineage for reductive dechlorination of a wide range of organohalides, and is an optimal candidate for applying the Bio-RD-PAO process. For example, Dehalococcoides is one of the only two organohaliderespiring genera able to dechlorinate hexachlorocyclohexane (HCH) (Doesburg et al, 2005;Maphosa et al, 2012;Bashir et al, 2018). Dehalococcoides transforms (α, β, γ, δ)-HCH to monochlorobenzene and benzene (Bashir et al, 2018), which enables their efficient and complete degradation via subsequent PAO.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

“…For example, Dehalococcoides is one of the only two organohaliderespiring genera able to dechlorinate hexachlorocyclohexane (HCH) (Doesburg et al, 2005;Maphosa et al, 2012;Bashir et al, 2018). Dehalococcoides transforms (α, β, γ, δ)-HCH to monochlorobenzene and benzene (Bashir et al, 2018), which enables their efficient and complete degradation via subsequent PAO. For reductive dichlorination of PCBs, Dehalococcoides, Dehalogenimonas and Dehalobacter can remove flanked meta-/para-chlorines from PCBs with different specificities and generate a variety of lowly-chlorinated PCBs for subsequent degradation using PAO.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Wang

2021

Front. Environ. Sci. Eng.

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Due to the toxicity of bioaccumulative organohalides to human beings and ecosystems, a variety of biotic and abiotic remediation methods have been developed to remove organohalides from contaminated environments. Bioremediation employing organohalide-respiring bacteria (OHRB)-mediated microbial reductive dehalogenation (Bio-RD) represents a cost-effective and environmentally friendly approach to attenuate highly-halogenated organohalides, specifically organohalides in soil, sediment and other anoxic environments. Nonetheless, many factors severely restrict the implications of OHRB-based bioremediation, including incomplete dehalogenation, low abundance of OHRB and consequent low dechlorination activity. Recently, the development of in situ chemical oxidation (ISCO) based on sulfate radicals (SO 4 ·− ) via the persulfate activation and oxidation (PAO) process has attracted tremendous research interest for the remediation of lowly-halogenated organohalides due to its following advantages, e.g., complete attenuation, high reactivity and no selectivity to organohalides. Therefore, integration of OHRB-mediated Bio-RD and subsequent PAO (Bio-RD-PAO) may provide a promising solution to the remediation of organohalides. In this review, we first provide an overview of current progress in Bio-RD and PAO and compare their limitations and advantages. We then critically discuss the integration of Bio-RD and PAO (Bio-RD-PAO) for complete attenuation of organohalides and its prospects for future remediation applications. Overall, Bio-RD-PAO opens up opportunities for complete attenuation and consequent effective in situ remediation of persistent organohalide pollution.

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Anaerobic biotransformation of hexachlorocyclohexane isomers by Dehalococcoides species and an enrichment culture

Cited by 31 publications

References 44 publications

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

Soil from a Hexachlorocyclohexane Contaminated Field Site Inoculates Wheat in a Pot Experiment to Facilitate the Microbial Transformation of β-Hexachlorocyclohexane Examined by Compound-Specific Isotope Analysis

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

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