Microbial dechlorination of HCB, PCP, PCB180, HCH and PCE in a Yangtze Three Gorges Reservoir enrichment culture, China

Kranzioch-Seipel, Irene; Beckert, Ulrike; Shen, Chaofeng; Yin, Daqiang; Tiehm, Andreas

doi:10.1007/s12665-016-5653-y

Cited by 15 publications

(8 citation statements)

References 44 publications

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“…So biochar might have the ability to benefit the growth of dechlorinators by improving the environmental condition for the dechlorinators and easing the competition relation between dechlorinators and other microorganisms to affect the dechlorination process in the presence molybdate. Besides, the family Peptococcaceae , whose abundance decreased significantly in the presence of molybdate, includes many degrading genera like Dehalobacter and Desulfitobacterium ( Dennie et al, 1998 ; Kranzioch-Seipel et al, 2016 ). Molybdate has been reported as capable of partially inhibit the dechlorination of polychlorinated biphenyls at a low concentration (1 mM) ( Ye et al, 1999 ).…”

Section: Discussionmentioning

confidence: 99%

Typical Soil Redox Processes in Pentachlorophenol Polluted Soil Following Biochar Addition

et al. 2018

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Reductive dechlorination is the primary pathway for environmental removal of pentachlorophenol (PCP) in soil under anaerobic condition. This process has been verified to be coupled with other soil redox processes of typical biogenic elements such as carbon, iron and sulfur. Meanwhile, biochar has received increasing interest in its potential for remediation of contaminated soil, with the effect seldom investigated under anaerobic environment. In this study, a 120-day anaerobic incubation experiment was conducted to investigate the effects of biochar on soil redox processes and thereby the reductive dechlorination of PCP under anaerobic condition. Biochar addition (1%, w/w) enhanced the dissimilatory iron reduction and sulfate reduction while simultaneously decreased the PCP reduction significantly. Instead, the production of methane was not affected by biochar. Interestingly, however, PCP reduction was promoted by biochar when microbial sulfate reduction was suppressed by addition of typical inhibitor molybdate. Together with Illumina sequencing data regarding analysis of soil bacteria and archaea responses, our results suggest that under anaerobic condition, the main competition mechanisms of these typical soil redox processes on the reductive dechlorination of PCP may be different in the presence of biochar. In particularly, the effect of biochar on sulfate reduction process is mainly through promoting the growth of sulfate reducer (Desulfobulbaceae and Desulfobacteraceae) but not as an electron shuttle. With the supplementary addition of molybdate, biochar application is suggested as an improved strategy for a better remediation results by coordinating the interaction between dechlorination and its coupled soil redox processes, with minimum production of toxic sulfur reducing substances and relatively small emission of greenhouse gas (CH4) while maximum removal of PCP.

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Section: Discussionmentioning

confidence: 99%

Typical Soil Redox Processes in Pentachlorophenol Polluted Soil Following Biochar Addition

et al. 2018

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“…Nonetheless, most reports of HCB biodegradation employed diluted concentrations of this pollutant (in the range of 0.08 ng g −1 to 50 μg g −1 ), as many microorganisms could not thrive in environments containing higher concentrations of organochlorines. 21,[41][42][43][44] Although the degradation of organochlorinated compounds by fungal laccases from basidiomycetes has been reported, 33,45,46 few research groups explored the degradation of HCB by basidiomycete fungi. In this sense, HCB degradation and its underlying metabolic pathways have been only explored mostly on bacterial models.…”

Section: Discussionmentioning

confidence: 99%

“…In this sense, HCB degradation and its underlying metabolic pathways have been only explored mostly on bacterial models. 1,7,21,[41][42][43][44]47,48 Another important aspect in this study was the anticipation of the peak production of laccase activity in the presence of HCB. This may evidence an important evolutionary adaptation of the fungus to environmental changes and the role of laccase in fungal detoxification of environments contaminated with organochlorinated compounds.…”

Section: Discussionmentioning

confidence: 99%

Application of Deconica castanella ligninolytic enzymatic system in the degradation of hexachlorobenzene in soil

Neto

Coelho

Ballaminut

et al. 2021

Biotech and App Biochem

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Hexachlorobenzene (HCB) is a pollutant still found in the environment despite being widely banned. Considering that basidiomycetes are useful to degrade a variety of organochlorinated pollutants, we therefore report the influence of HCB on the ligninolytic enzymatic system of Deconica castanella. The inoculum was prepared with sugarcane bagasse and soybean flour and was added in soil with and without HCB (2000 mg kg soil −1 ), 5% emulsion containing soybean oil and Tween 20 at proportion 9:1, v:v; with 70% moisture at 25 • C. Fungal biomass was quantified by widely acknowledged growth biomarker ergosterol. The extraction of the enzymatic complex was performed and laccase, Mn-dependent peroxidase (MnP), and lignin peroxidase (LiP) activities were determined. Furthermore, HCB and its metabolites were quantified by gas chromatography and chlorides by potentiometric titration. Results evidenced that HCB did not interfere in fungal growth, though the only detected enzymatic activity was laccase. MnP and Lip were not detected during D. castanella growth in soil. The peak of laccase enzymatic activity occurred in the presence of HCB. In addition, the laccase exhibited thermostability. Therefore, we hereby shed light on the role of laccase in the degradation of HCB by an efficient low-cost and environmentally safe detoxification mechanism.

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“…The project is coordinated by the TZW—Water Technology Center—providing large experience with challenging multinational research projects as well as with fruitful SinoGerman cooperation e.g. within the Yangtze project [1, 18–20]. …”

Section: Scope Of the Project—assure Good Water Quality From The Sourmentioning

confidence: 99%

Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

et al. 2016

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The Taihu (Tai lake) region is one of the most economically prospering areas of China. Due to its location within this district of high anthropogenic activities, Taihu represents a drastic example of water pollution with nutrients (nitrogen, phosphate), organic contaminants and heavy metals. High nutrient levels combined with very shallow water create large eutrophication problems, threatening the drinking water supply of the surrounding cities. Within the international research project SIGN (SinoGerman Water Supply Network, www.water-sign.de), funded by the German Federal Ministry of Education and Research (BMBF), a powerful consortium of fifteen German partners is working on the overall aim of assuring good water quality from the source to the tap by taking the whole water cycle into account: The diverse research topics range from future proof strategies for urban catchment, innovative monitoring and early warning approaches for lake and drinking water, control and use of biological degradation processes, efficient water treatment technologies, adapted water distribution up to promoting sector policy by good governance. The implementation in China is warranted, since the leading Chinese research institutes as well as the most important local stakeholders, e.g. water suppliers, are involved.

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Microbial dechlorination of HCB, PCP, PCB180, HCH and PCE in a Yangtze Three Gorges Reservoir enrichment culture, China

Cited by 15 publications

References 44 publications

Typical Soil Redox Processes in Pentachlorophenol Polluted Soil Following Biochar Addition

Typical Soil Redox Processes in Pentachlorophenol Polluted Soil Following Biochar Addition

Application of Deconica castanella ligninolytic enzymatic system in the degradation of hexachlorobenzene in soil

Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

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