Iron oxides stimulate microbial monochlorobenzene in situ transformation in constructed wetlands and laboratory systems

Sediment Monitored Natural Recovery Evidenced by Compound Specific Isotope Analysis and High-Resolution Pore Water Sampling

“…The redox data suggested the dominance of iron reducing conditions along the bottom portion of the sediment. Such redox conditions are known to support MCB microbial degradation via reductive dechlorination. , Both the observed reducing conditions and the presence of benzene with a similar upward concentration decrease as for MCB, suggest that MCB dechlorination is occurring along the sediment profile. The strongest line of evidence is provided by the significant enrichment in 13 C in MCB concomitant with decreasing concentrations of MCB.…”

Quantifying the Mineralization of 13C-Labeled Cations and Anions Reveals Differences in Microbial Biodegradation of Herbicidal Ionic Liquids between Water and Soil

“…This 13 C-labeling approach had already been applied for assessing the biodegradation potential of pollutants that resist microbial degradation such as benzene, PAHs, monochlorobenzene or pesticides. [28][29][30][31][32] The assimilation of cation and anion of ([C12-BA][MCPA]) was investigated by monitoring the incorporation of the 13 C-label into microbial fatty acids. Metabolites were analyzed, in order to decipher biodegradation pathways of ([C12-BA][MCPA]).…”

“…In this study, either the cation or the anion was labeled with 13 C and using enhanced 301 and 307 test methodologies, the mineralization of cation and anion was separately evaluated by monitoring the incorporation of the 13 C-label into CO 2 . This 13 C-labeling approach had already been applied for assessing the biodegradation potential of pollutants that resist microbial degradation, such as benzene, polyaromatic hydrocarbons (PAHs), monochlorobenzene, or pesticides. − The assimilation of cation and anion of ([C 12 -BA]­[MCPA]) was investigated by monitoring the incorporation of the 13 C-label into microbial fatty acids. Metabolites were analyzed, to decipher biodegradation pathways of ([C 12 -BA]­[MCPA]).…”

Application of stable isotope tools for evaluating natural and stimulated biodegradation of organic pollutants in field studies

“…Laboratory microcosm studies have assessed the biodegradation potential of pollutants that resist microbial degradation such as benzene, PAHs, monochlorobenzene or pesticides [37,38 ,39,40,41]. Moreover, the potential of biostimulation or bioaugmentation strategies can be evaluated [40]. The disadvantage of laboratory microcosms is that they cannot fully mimic complexities in the environment such as availability of substrates, nutrients and electron acceptors, complex interactions as well as heterogeneity of microbial communities (e.g.…”