• Title/Summary/Keyword: Aroclor 1016

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Toxic effects of Aroclor 1016 and bisphenol A on marine green algae Tetraselmis suecica, diatom Ditylum brightwellii and dinoflagellate Prorocentrum minimum (해양 녹조류 Tetraselmis suecica, 규조류 Ditylum brightwellii, 와편모조류 Prorocentrum minimum에 대한 Aroclor 1016과 비스페놀 A의 독성 효과)

  • Ebenezer, Vinitha;Ki, Jang-Seu
    • Korean Journal of Microbiology
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    • v.52 no.3
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    • pp.306-312
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    • 2016
  • Microalgae are the potential bioindicators of environmental changes, for the environmental risk assessment as well as to set limits for toxic chemical release in the aquatic environment. Here, we evaluated the effects of two endocrine disrupting chemicals (EDCs), namely bisphenol A (BPA) and Aroclor 1016, on the green algae Tetraselmis suecica, diatom Ditylum brightwellii, and dinoflagellate Prorocentrum minimum. Each species showed wide different sensitivity ranges when exposed to these two EDCs; the 72 h effective concentration ($EC_{50}$) for these test species showed that Aroclor 1016 was more toxic than BPA. $EC_{50}$ values for the diatom D. birghtwellii were calculated at 0.037 mg/L for BPA and 0.002 mg/L for Aroclor 1016, representing it was the most sensitive when compared to the other species. In addition, these results suggest that these EDC discharge beyond these concentrations into the aquatic environments may cause harmful effect to these marine species.

Evaluation of the sub-lethal toxicity of Cu, Pb, bisphenol A and polychlorinated biphenyl to the marine dinoflagellate Cochlodinium polykrikoides

  • Ebenezer, Vinitha;Ki, Jang-Seu
    • ALGAE
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    • v.27 no.1
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    • pp.63-70
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    • 2012
  • Algae are sensitive to a wide range of pollutants, and are effective bioindicators in ecotoxicity assessments. Here, we evaluated the sub-lethal sensitivity of the marine dinoflagellate Cochlodinium polykrikoides upon exposure to copper (Cu), lead (Pb), bisphenol A (BPA), and Aroclor 1016 (polychlorinated biphenyl, PCB). Toxic effects were assessed by observations of the reduction in cell counts and chlorophyll a levels after exposure to each toxicant. C. polykrikoides displayed dose-dependent, sigmoidal responses when exposed to the tested chemicals. $EC_{50}$-72 h values for Cu, Pb, BPA, and PCB were 12.74, 46.70, 68.15, and $1.07mg\;L^{-1}$, respectively. PCB, which is an endocrine-disrupting chemical, was the most sensitive, proving its toxic effect on the dinoflagellate. This study provides baseline data on the toxic effects of commonly used heavy metals and endocrine-disrupting chemicals to a marine dinoflagellate.

Degradation of Organochlorinated Pollutants by Microorganism -Degradation of PCBs and Organochlorine Pesticides, and Degradasion Products- (미생물에 의한 난분해성 유기염소계 오염물질의 분해 -각종 PCBs 및 유기염소계 농약의 분해와 분해산물-)

  • Kim, Chan-Jo;Oh, Man-Jin;Lee, Jong-Soo
    • Applied Biological Chemistry
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    • v.30 no.1
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    • pp.40-45
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    • 1987
  • Degradation of polychlorinated biphenyls(PCBs) and organochlorine pesticides by Alcaligenes aquamarinus has been studied and also degradation product of PCB-42 was investigated by TLC and GC. The less chlorinated members of PCBs such as Aroclor 1016 was degraded readily by the strain and rates of the microbial degradation of several organochlorine pesticides were found to decrease in the order of p,p'-DDT, r-BHC and Thiolix. Approximately 40 percent of PCB-42 was degraded when incubated with non-autoclaved soil for 25 days at $25^{\circ}C$. The yellow compound from PCB-42 was tentatively identified as p-chlorobenzoic acid.

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