지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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This study was initiated to quantitatively evaluate the effects of five heavy metals (Cd, Cu, Zn, Pb, and Ni) on growth and P removal efficiencies of Pseudomonas taeanensis, known as the phosphorus accumulating microorganism. The heavy metals were added individually and with the binary mixture to the batch culturing system of Pseudomonas taeanensis. IC<SUB>50</SUB> and EC<SUB>50</SUB> were used to quantitatively evaluate their effects on the growth and phosphorus removal efficiency of Pseudomonas taeanensis in those treatments. Additionally, additive index value method was used to evaluate the interactive effects of heavy metals for Pseudomonas taeanensis in this study. As those heavy metals were singly added to Pseudomonas taeanensis, the greatest inhibitory effect on its growth and P removal efficiency was observed in Cd, whereas, the smallest effect was found in Ni. As the concentrations of all heavy metals added were gradually increased, its growth and P removal efficiency was correspondingly decreased. Specifically, IC50 of Pseudomonas taeanensis for Cd, Cu, Zn, Pb, and Ni were 0.44 mg L<SUP>-1</SUP>, 5.12 mg L<SUP>-1</SUP>, 7.46 mg L<SUP>-1</SUP>, 8.37 mg L<SUP>-1</SUP> and 14.56 mg L<SUP>-1</SUP>, respectively. The P removal efficiency of Pseudomonas taeanensis was 81.1%. EC<SUB>50</SUB> values of Pseudomonas taeanensis for Cd, Cu, Zn, Pb, and Ni were 0.44 mg L<SUP>-1</SUP>, 4.08 mg L<SUP>-1</SUP>, 7.17 mg L<SUP>-1</SUP>, 8.90 mg L<SUP>-1</SUP> and 11.26 mg L<SUP>-1</SUP>, respectively. In the binary treatments of heavy metals, the lowest IC<SUB>50</SUB> and EC<SUB>50</SUB> were found in the Cd + Cu treatment, whereas, the highest IC<SUB>50</SUB> and EC<SUB>50</SUB> were found in the Zn + Pb and Pb + Ni treatments, respectively. Most of the interactive effects for the binary mixture treatments of heavy metals were antagonistic. Based on the results obtained from this study, it appears that they could provide the basic information about the toxic effects of the respective individual and binary treatments of heavy metals on the growth and P removal efficiency of other phosphorus accumulating organisms.
목차
ABSTRACT
Introduction
Materials and Methods
Results and Discussion
Conclusions
References
참고문헌 (56)
참고문헌 신청
An, Y.J., Y.M. Kim, T.I. Kwon, and S.W. Jeong. 2004. Combined effect of copper, cadmium and lead upon Cucumis sativus growth and bioaccumulation. Sci. Total Environ. 326(1-3):85-93.
Asami, M., N. Suzuki and J. Nakanishi. 1996. Aquatic toxicity emission from Tokyo: Wastewater measured using marine luminescent bacterium, Photobacterium phosphoreum. Water Sci. Tech. 33(6):121-128.
Barnard, J.L. 1973. Biological denitrification. Water Pollut. Control. 72:705-719.
Buhl, K.J. and S.J. Hamilton. 1997. Hazard evaluation of inorganics, singly and in mixtures, to flannelmouth sucker Catostomus latipinnis in the San Juan River, New mexico. Ecotoxicol Environ Saf. 38:296-308.
Cai, T.M., L.B. Guan, L.W. Chen, S. Cai, X.D. Li, Z.L. Cuiand, and S.P. Li. 2007. Enhanced biological phosphorus removal with Pseudomonas putida GM6 from activated sludge. Pedosphere. 17(5):624-629.
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UCI(KEPA) : I410-ECN-0101-2018-523-001805819