Pedosphere 23(1): 120--127, 2013
ISSN 1002-0160/CN 32-1315/P
©2013 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Enzyme activities in perfluorooctanoic acid (PFOA)-polluted soils |
ZHANG Wei1,2,3 , LIN Kuang-Fei1,2,3, YANG Sha-Sha1,2,3 and ZHANG Meng1,2,3 |
1 School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237 (China)
2 State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, Shanghai 200237 (China)
3 Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai 200237 (China) |
| ABSTRACT |
| Perfluorooctanoic acid (PFOA) is a popular additive of the chemical industry; its effect on activities of important soil enzymes is not well understood. A laboratory incubation experiment was carried out to analyze the PFOA-induced changes in soil urease, catalase, and phosphatase activities. During the entire incubation period, the activities of the three soil enzymes generally declined with increasing PFOA concentration, following certain dose-response relationships. The values of EC10, the contaminant concentration at which the biological activity is inhibited by 10%, of PFOA for the soil enzyme activity calculated from the modeling equation of the respective dose-response curve suggested a sensitivity order of phosphatase > catalase > urease. The effect of PFOA on soil enzyme activities provided a basic understanding of the eco-toxicological effect of PFOA in the environment. Results of this study supported using soil phosphatase as a convenient biomarker for ecological risk assessment of PFOA-polluted soils. |
| Key Words: activity inhibition, biomarker, dose-response curve, ecological risk, regression equation |
| Citation: Zhang, W., Lin, K. F., Yang, S. S. and Zhang, M. 2013. Enzyme activities in perfluorooctanoic acid (PFOA)-polluted soils. Pedosphere. 23(1): 120-127. |
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