A gas-permeable silicone membrane bioreactor was used to cultivate the biofilm under hydrogenotrophic condition for reductive dechlorination of 2-chlorophenol (2-CP). The anaerobic sludge obtained from a swine wastewater treatment plant was immobilized by polyvinyl alcohol (PVA) so as to form a biofilm on the surface of the silicone tube. After acclimating for about 4 months, the bioreactor sho...

In this study, wood mulch-based amendments were tested in a bench-scale microcosm experiment order to assess the treatability of saturated soils and groundwater from an industrial site contaminated by chlorinated ethenes. Wood mulch was alone as only electron donor its potential for stimulating biological reductive dechlorination. It also combination with millimetric iron filings ability additi...

Research works in the recent past have revealed three major biodegradation processes leading to the degradation of trichloroethylene. Reductive dechlorination is an anaerobic process in which chlorinated ethenes are used as electron acceptors. On the other hand, cometabolism requires oxygen for enzymatic degradation of chlorinated ethenes, which however yields no benefit for the bacteria involv...

Significant advances in the ecology, physiology and genetics of reductively dechlorinating bacteria have revealed their important environmental roles in bioremediation and in the global chlorine cycle. N2 fixation has been widely observed in symbiotic, associative and free-living bacteria. Here we show physiological and molecular evidence that reductively dechlorinating bacteria are capable of ...

A new method to prepare solid state chlorometallates by reductive dechlorination of solvated niobium pentachloride with vaporisation of nominally free atoms of samanum is described. Products were prepared in an original set-up by evaporation of samarium into a mixed toluene solution of NbCl,, at 180 K. The local order around the Nb atoms was probed by EXAFS spectroscopy at the Nb K edge, using ...

The author used a recent article on lindane (γ-hexachloro-cyclohexane) reductive dechlorination by Fe/Pd bimetallics to point out that many other of published works in several journals do not conform to the state-of-the-art knowledge on the mechanism of aqueous contaminant removal by metallic iron (e.g. in Fe(0)/H(2)O systems). It is the author's view that the contribution of adsorbed Fe(II) to...

Understanding the underlying mechanism that drives microbial community mediated by substrates is crucial to enhance biostimulation in trichloroethene (TCE)-contaminated sites. Here, we investigated performance of stable TCE-dechlorinating consortia monitoring variations TCE-related metabolites and explored their assembly mechanisms using 16S rDNA amplicon sequencing bioinformatics analyses. The...