Compound specific isotope analysis (CSIA) has been applied to monitor bioremediation of groundwater contaminants and provide insight into mechanisms of transformation of chlorinated ethanes. To date there is little information on its applicability for chlorinated methanes. Moreover, published enrichment factors (ε) observed during the biotic and abiotic degradation of chlorinated alkanes, such ...

Compound-specific isotope analysis (CSIA) offers great potential as a tool to provide chemical evidence in a forensic investigation. Many attempts to trace environmental oil spills were successful where isotopic values were particularly distinct. However, difficulties arise when a large data set is analyzed and the isotopic differences between samples are subtle. In the present study, discrimin...

Mass blooms of purple sulfur bacteria growing seasonally on green stranded macroalgae have a major impact on the microbial composition and functionality of intertidal mats. To explore the active anoxygenic phototrophic community in purple bacterial mats from the Roscoff Aber Bay (Brittany, France), we conducted a combined approach including molecular and high-resolution secondary ion mass spect...

Compound-specific isotope analysis (CSIA) is an increasingly important tool for the qualitative and quantitative assessment of transformations of organic compounds in contaminated environments. To date, the use of CSIA has been mainly restricted to the elements C and H, although Nconstitutes a very important reactive centerfor many priority contaminants. To evaluate the potential use of N isoto...

Organic compounds are produced in vast quantities for industrial and agricultural use, as well as for human and animal healthcare [1]. These chemicals and their metabolites are frequently detected at trace levels in fresh water environments where they undergo degradation via different reaction pathways. Compound specific stable isotope analysis (CSIA) is a valuable tool to identify such degrada...

OBJECTIVES The Rapa Nui "ecocide" narrative questions whether the prehistoric population caused an avoidable ecological disaster through rapid deforestation and over-exploitation of natural resources. The objective of this study was to characterize prehistoric human diets to shed light on human adaptability and land use in an island environment with limited resources. MATERIALS AND METHODS Ma...

The structure and function of a microbial community capable of biodegrading methyl-tert-butyl ether (MTBE) was characterized using compound-specific stable isotope analysis (CSIA), clone libraries and stable isotope probing of proteins (Protein-SIP). The enrichment culture (US3-M), which originated from a gasoline-impacted site in the United States, has been enriched on MTBE as the sole carbon ...

Isotope ratio analysis of total organic carbon (TOC) is well-established for the study rivers, lakes, and oceans. Similarly, these aquatic systems are routinely surveyed to quantify natural anthropogenic compounds pollutants, including such things as pharmaceuticals, illicit drugs, phthalates. We merged two approaches demonstrate compound specific isotope (CSIA) on four phthalate esters non-tar...

Natural attenuation (NA) processes represent a valuable option in groundwater remediation. At heavily 1,2-dichloroethane (1,2-DCA) contaminated site, Compound-Specific Isotope Analysis (CSIA) combination with Biological Molecular Tools (BMTs) were implemented as rigorous characterization approach to evaluate the occurrence of Attenuation proximity source area. By use microcosm experiments, pote...

Compound-specific stable isotope analysis (CSIA) is an efficient method for source apportionment and the identification of transformation process in organic compounds. However, most studies CSIA are still limited to laboratory experiments. Few used have situ environment due complexity environmental samples. Therefore, a purification analyzing carbon ratios three phenolic endocrine disrupting co...