Biogeochemical reductive dechlorination

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August undefined, 2024

WebReductive dechlorination is a common anaerobic biodegradation mechanism for chlorinated aromatic compounds. This research tested the hypothesis that the rate of reductive dechlorination reactions depend upon the apparent redox potential, or EH, of the reaction medium. ... Coupling to the Biogeochemical Matrix WebContrastingly, VC was metabolically oxidized by ethenotrophs in low-TOC sediments with low reductive dechlorination potential. Accordingly, enrichment and isolation of …

A Chloroflexi bacterium dechlorinates polychlorinated biphenyls in ...

WebThe PCP reductive dechlorination products were mainly 2,4,6-trichlorophenol and 4-mono-chlorophenol with lower toxicity. High-throughput 16S rRNA gene sequencing indicated that Pseudomonas, Soehngenia, and Anaerolinea might be responsible for the two bio-transformations, with detected functional genes of nirS and cprA. WebIn a parallel approach, when the acclimated microorganisms from the Reynolds site were inoculated into fresh sediments from both sources as well as sediments enriched with … the raccoon of wall street

Enhanced reductive dechlorination of tetrachloroethene during reduction ...

WebINIS Repository Search provides online access to one of the world's largest collections on the peaceful uses of nuclear science and technology. The International Nuclear Information System is operated by the IAEA in collaboration with over 150 members. WebWe investigated whether the threshold concentration for polychlorinated biphenyl (PCB) dechlorination may be lower in biosurfactant-amended sediments compared with … WebFeb 1, 2012 · Abiotic agents that may enhance the reductive dechlorination of chlorinated ethanes and ethenes are zero-valent metals, sulphide minerals or green rusts. At some sites, permanganate and … the raccoon society

Field-scale demonstration of induced biogeochemical reductive ...

Geochemical Parameters and Reductive Dechlorination Determine …

WebNov 15, 2001 · Straight chain hydrocarbons were extracted from the dolomite previously found to stimulate reductive dechlorination; these were particularly depleted in hexadecane (HD). Thus, we hypothesized that HD and related hydrocarbons might be anaerobically respired and serve both as the source of on-site DIC and support … WebTo effectively apply this strategy, further understanding of the biogeochemical processes controlling the reductive transformation of these compounds is needed. In this research, we studied the biotic and abiotic reductive dechlorination of carbon tetrachloride (CT) in iron- and sulfate-reducing microcosms that were prepared with natural soils ... the raccoons tommy and julieWebMay 30, 2024 · Results showed that despite the absence of lactate, lactate fermentation transformation products, or hydrogen, biogeochemical conditions remained favorable for the reductive dechlorination of chlorinated ethenes. In locations where soil data showed that TCE DNAPL sources persisted, local contaminant rebound was observed in … the raccoons schaeffer

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Biogeochemical reductive dechlorination

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WebThese iron sulfide minerals provide reductive dechlorination of chlorinated solvents such as PCE, TCE, and DCE. Large quantities of iron sulfides (FeS) can be developed in a … WebOct 1, 2024 · Microbial reductive dechlorination is a major degradation pathway of chlorinated hydrocarbon in anaerobic subsurface environments, has been extensively studied. ... Years later, nZVI was tested for stimulating PCBs dechlorination under in situ-like biogeochemical conditions in a marine sediment (1.6 mg/kg (dry wt.)) collected from …

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WebDec 1, 1994 · A Chloroflexi bacterium dechlorinates polychlorinated biphenyls in marine sediments under in situ-like biogeochemical conditions. Journal of Hazardous Materials 2012, 209-210 , 449 ... Microbial reductive dechlorination of pre-existing PCBs and spiked 2,3,4,5,6-pentachlorobiphenyl in anaerobic slurries of a contaminated sediment of Venice ... WebThe National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C.

WebBiostimulation is widely used to enhance reductive dechlorination of chlorinated ethenes in contaminated aquifers. However, the knowledge on corresponding biogeochemical … Web开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆

WebApr 10, 2024 · Biogeochemical processes leading to the oxidation of DOM and the depletion of DO lead to biotic reductive dechlorination of chlorinated solvents when dominant redox conditions become sufficiently reducing (Wiedemeier et al., 1998; Bradley, 2003, Bradley, 2011). The fracture zones that affect aquitards play a similar role to the … WebOct 15, 2012 · The dechlorination kinetic rate constant of PCE in the nFeSCo(III) suspension (k(FeSCo(III))=0.188±0.003 h(-1)) was 145 times greater than that in nFeS suspension, showing a potential role of ≡S(2-)Co(II) as an electron transfer mediator to shuttle electrons for the enhanced reductive dechlorination.

WebJan 1, 2003 · Biogeochemical Reductive Dechlorination (BiRD) is an alternative to bio- stimulation processes used for the treatment of chlorinated aliphatic hydrocarbons (CAHs). BiRD is a new treatment concept ...

WebMar 30, 2012 · We investigated the reductive dechlorination of Aroclor 1254 PCBs by a coplanar PCB-dechlorinating microbial community enriched from an actual site contaminated marine sediment of the Venice lagoon in sterile slurry microcosms of the same sediment suspended in its site water, i.e., under biogeochemical conditions that closely mime … sign of bad fuel injectorsWebSITUATIONAL SUMMARY. In Situ Chemical Reduction (ISCR) using ELS ® Microemulsion was compared to Enhanced Reductive Dechlorination (ERD) to treat groundwater affected by trichloroethene (TCE). Two pilot tests were conducted that compared the rates of contaminant degradation as well as other biogeochemical processes of both processes. the race 2022WebNov 20, 2006 · Biogeochemical reductive dechlorination (BiRD) is a new remediation approach for chlorinated aliphatic hydrocarbons (CAHs). The approach stimulates … the rac dover ohioWebTraductions en contexte de "métabolique réducteur" en français-anglais avec Reverso Context : Dans le cas de composés azoïques et diazoïques, un système d'activation métabolique réducteur peut s'avérer plus approprié (6) (13). the raccoons sophia tutuWebJan 1, 2014 · Biogeochemical reductive dechlorination is primarily employed as a barrier technology, and to date these usually have been biowalls of mulch amended with gypsum and goethite. In Situ Redox Manipulation.In soil matrices with significant iron (>1 wt%), applications of moderately strong chemical reductants such as sodium dithionite or … the raccoons run with us steve luntWebAn experiment was conducted, in which a carbohydrate solution (molasses) was injected into groundwater wells at a site impacted with chlorinated VOC, e.g., perchloroethylene … the race 2022 atlantaWebHowever, the exact reaction mechanism underlying each step of reductive dechlorination remains at the stage of hypothesis where three different reaction mechanisms have so far been proposed. As molecules containing light isotopes are generally degraded faster than molecules containing heavy isotopes due to energetic reasons, the isotopic ... sign of bad turbo