Effect of added heavy metal ions on biotransformation and biodegradation of 2-chlorophenol and 3-chlorobenzoate in anaerobic bacterial consortia.

Applied and Environmental Microbiology
C Kuo, B Genthner

Abstract

The effect of added Cd(II), Cu(II), Cr(VI), or Hg(II) at 0.01 to 100 ppm on metabolism in anaerobic bacterial consortia which degrade 2-chlorophenol (2CP), 3-chlorobenzoate (3CB), phenol, and benzoate was examined. Three effects were observed, including extended acclimation periods (0.1 to 2.0 ppm), reduced dechlorination or biodegradation rates (0.1 to 2.0 ppm), and failure to dechlorinate or biodegrade the target compound (0.5 to 5.0 ppm). 3CB biodegradation was most sensitive to Cd(II) and Cr(VI). Biodegradation of benzoate and phenol was most sensitive to Cu(II) and Hg(II), respectively. Adding Cr(VI) at 0.01 ppm increased biodegradation rates of phenol (177%) and benzoate (169%), while Cd(II) and Cu(II) at 0.01 ppm enhanced biodegradation rates of benzoate (185%) and 2CP (168%), respectively. Interestingly, with Hg(II) at 1.0 to 2.0 ppm, 2CP and 3CB were biodegraded 133 to 154% faster than controls after an extended acclimation period, suggesting adaptation to Hg(II). Metal ions were added at inhibitory, but sublethal, concentrations to investigate effects on metabolic intermediates and end products. Phenol accumulated to concentrations higher than those in controls only in the 2CP consortium with added Cu(II) at 1.2 ppm b...Continue Reading

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Citations

Oct 31, 1998·Applied and Environmental Microbiology·P MalakulH Y Wang
Aug 19, 2010·Integrative Biology : Quantitative Biosciences From Nano to Macro·Hyun Jung KimRustem F Ismagilov
Apr 24, 2013·Environmental Science and Pollution Research International·Dharmaraj Gunasundari, Karuppan Muthukumar
May 17, 2013·International Journal of Molecular Sciences·Ademola O OlaniranBalakrishna Pillay
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Nov 3, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·YangWei YanLuMing Ma
Oct 11, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ariel MarchlewiczDanuta Wojcieszyńska
Sep 25, 2019·Chemosphere·Obioma K MejehaNeil D Gray
Mar 22, 2021·Journal of Environmental Sciences (China)·Na LiuBairen Yang

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