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3,090 results
  • Biogenic FeS promotes dechlorination and thus de-cytotoxity of trichloroethylene. [Journal Article]
    Bioprocess Biosyst Eng. 2020 May 18 [Online ahead of print]Nie Z, Wang N, … Xue Z
  • Abiotic iron monosulfide (FeS) has attracted growing interests in dechlorinating trichloroethylene (TCE) in anoxic groundwater, but it is still unclear how biogenic FeS affects the dechlorination and thus the cytotoxity of TCE. In this work, a biogenic FeS was synthesized by Shewanella oneidensis MR-1 with addition of ferrihydrite and S0, and it was used for dechlorination of TCE in alkaline envi…
  • Fluoroacetate dehalogenase catalyzed dehalogenation of halogenated carboxylic acids: A QM/MM approach. [Journal Article]
    Chemosphere. 2020 Apr 23; 254:126803.Yue Y, Chen J, … Zhang Q
  • Dehalogenation is one of the most important reactions in environmental pollution control, for instance, the degradation of persistent organic pollutants (POPs). Recently, fluoroacetate dehalogenase (FAcD) has been reported to catalyze the dehalogenation reactions, which shows great potential in treating halogenated pollutants. Here the dehalogenation mechanism catalyzed by FAcD was fully decipher…
  • Structural basis for the hydrolytic dehalogenation of the fungicide chlorothalonil. [Journal Article]
    J Biol Chem. 2020 Apr 30 [Online ahead of print]Catlin DS, Yang X, … Liu D
  • Cleavage of aromatic carbon-chlorine bonds is critical for the degradation of toxic industrial compounds.  Here, we solved the X-ray crystal structure of chlorothalonil dehalogenase (Chd) from Pseudomonas sp. CTN-3, with 15 of its N-terminal residues truncated (ChdT), using single-wavelength anomalous dispersion refined to 1.96 Å resolution.  Chd has low sequence identity (< 15%) compared with al…
  • Interaction of zero-valent iron and carbonaceous materials for reduction of DDT. [Journal Article]
    Chemosphere. 2020 Aug; 253:126712.Kopinke FD, Sühnholz S, … Mackenzie K
  • Dechlorination of dichlorodiphenyltrichloroethane (DDT) as a model compound was performed with zero-valent iron (micro-ZVI and nano-ZVI) as reductant and carbonaceous adsorbents as sink and catalyst in water. DDT is rapidly converted to dichlorodiphenyldichloroethane (DDD) in direct contact with ZVI. However, up to 90% of the DDD is transformed into non-identified, most likely oligomeric products…
  • Solar irradiation combined with chlorine can detoxify herbicides. [Journal Article]
    Water Res. 2020 Jun 15; 177:115784.Kong X, Wang L, … Fang J
  • The solar/chlorine process is an energy-efficient advanced oxidation process that can produce reactive species such as hydroxyl radical, reactive chlorine species and ozone. This study investigated the process' ability to detoxify the typical herbicides atrazine and mecoprop (methylchlorophenoxypropionic acid). Both herbicides are resistant to direct solar photolysis or chlorination alone, but th…
  • Flavonoid-sensitized photolysis of chlorothalonil in water. [Journal Article]
    Pest Manag Sci. 2020 Apr 04 [Online ahead of print]Lv P, Min S, … Hua R
  • CONCLUSIONS: The photosensitization effect of flavonoids on chlorothalonil photolysis is apparently related to flavonoid structure and might be due to their hydrogen donation capacity. These results highlight benefit of using flavonoids to manage aquatic pollution and reduce aquatic toxicity, and have great relevance in predicting the degradation kinetics and biological impacts of chlorothalonil in surface water.
  • Retrospective on microbial transformations of halogenated organics. [Journal Article]
    Environ Sci Process Impacts. 2020 Mar 01; 22(3):512-517.McCarty PL, Criddle CS, Vogel TM
  • Prior to the 1960s, knowledge of biological transformations of highly halogenated aliphatic compounds was limited, except in mammalian organisms where enzymatic transformations occurred to rid the body of ingested harmful chemicals. Limited abiotic transformation of such compounds had also been observed, with half-lives varying from days to centuries. Commonly believed was that aerobic transforma…
  • Quantifying the efficiency and selectivity of organohalide dechlorination by zerovalent iron. [Journal Article]
    Environ Sci Process Impacts. 2020 Mar 01; 22(3):528-542.He F, Gong L, … Lowry GV
  • The efficiency and selectivity of zerovalent iron-based treatments for organohalide contaminated groundwater can be quantified by accounting for redistribution of electrons derived from oxidation of Fe0. Several types of efficiency are reviewed, including (i) the efficiency of Fe(0) utilization, εFe(0), (ii) the electron efficiency of target contaminant reduction, εe, and (iii) the electron effic…
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