Chlorinated ethenes
WebAug 26, 2024 · Established an extramurally-funded research program with emphasis upon bacterial photosynthesis and carbon fixation and … WebIn situ chemical oxidation (ISCO) and in situ thermal remediation (ISTR) are applicable to treatment of groundwater contaminated with chlorinated ethenes. ISCO with persulfate (S 2 O 8 2-) requires activation, and this can be achieved with the heatfrom ISTR, so there may be advantages to combining these technologies. To explore this possibility ...
Chlorinated ethenes
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WebChlorinated ethenes are typically known to undergo sequential biotic reductive dechlorination in strictly anoxic conditions (i.e. PCE → trichloroethylene (TCE) → cis-dichloroethylene (cDCE) → vinyl chloride (VC) → ethene). WebChlorinated ethenes such as perchloroethene (PCE), trichloroethene (TCE), 1,2-cis-dichloroethene (cis-DCE) and vinyl chloride (VC) are among the most widespread …
WebFeb 1, 1999 · Chlorinated ethenes from groundwater in tree trunks Full Record Related Research Abstract The purpose of this investigation was to determine whether tree-core analysis could be used to delineate shallow groundwater … WebApr 28, 2024 · Chlorinated solvents are a large family of organic solvents that contain chlorine atoms in their molecular structure. They were first produced in Germany in the 1800s, and widespread use in the United States (U.S.) began after World War II. In the …
WebOct 1, 2005 · The results indicate that persulfate oxidation mechanisms are effective in degrading many VOCs including chlorinated ethenes (CEs), BTEXs and trichloroethanes that are frequently detected in the subsurface at contaminated sites. WebApr 1, 2024 · Chlorinated ethenes (CEs) are most problematic pollutants in groundwater. Dehalogenating bacteria, and in particular organohalide-respiring bacteria …
WebApr 20, 2024 · Sulfidized nanoscale zerovalent iron (SNZVI) with desirable properties and reactivity has recently emerged as a promising groundwater remediation agent. However, little information is available on how the molecular structure of chlorinated ethenes (CEs) affects their dechlorination by SNZVI or whether the sulfur content of SNZVI can alter …
Web- 3 - Chlorinated ethenes and other chlorinated solvents can be co-oxidized by a wide range of oxygenase-expressing microbes including those that utilize methane1-3, ethene and ethane4, 5, propane6-9, phenol10- 12, or toluene13, 14 as energy and carbon sources. In general terms, the potential for aerobic cometabolism to contribute to contaminant … ruler of the 8th in the 5thWebMay 17, 2010 · Biodegradation of chlorinated ethenes by naturally occurring or artificially enhanced processes is an important component of current site remediation strategies. At this writing, several microbial ... ruler of shinarWebThe chlorinated ethenes and hexachloroethane react only with hydroxide under severe conditions and exhibit no neutral hydrolysis. Some of these compounds eliminate HCl, whereas others substitute OH for Cl to form alcohols that may react further to give aldehydes or carboxylic acids as products. Environmental hydrolysis half-lives (25 C, pH … scars on tympanic membraneWebJun 13, 2024 · Chlorinated ethenes (CEs) are widely used as degreasing agents and dry cleaning solvents. Tetrachloroethene (PCE) and … ruler of everything 8 bitWebThe kinetics of chlorinated ethene disappearance were pseudo-first-order for 1−2 half-lives, and the resulting rate constantsmeasured from 30 to 70 °Cfit the Arrhenius equation, … ruler of mali empireWebAug 15, 2005 · All chlorinated ethanes except 1,2-DCA were transformed to less chlorinated ethanes or ethenes. The surface-area-normalized rate constants from first … ruler of shang dynastyWebChloroflexi. They identified Chloroflexi (32±9%), Proteobacteria (18±5%), Bacteroidetes (11±6%), and Firmicutes (9±6%) as the core phyla of the Bacteria domain present in the … scars on white skin