Volume 51, Number 1, January-March 2016
|Page(s)||37 - 41|
|Published online||25 January 2016|
Assessment of the soil quality by fuzzy mathematics in farmland around a uranium mill tailing repository in China
College of Chemistry and Chemical Engineering, Qiqihar University
2 Southwest University of Science and Technology Mianyang, Sichuan 621010, P.R. China.
Accepted: 16 October 2015
Based on statistical analysis of the concentrations of multiple contaminants such as radionuclides, heavy metals and organochlorine pesticides in soil samples, the soil quality of a large piece of farmland around a uranium mill tailing (UMT) pond was assessed by fuzzy mathematics. This study found that the concentrations of U, Th, Cd, Pb and DDT in all sampling sites and Cr in sites 1 and 2 were above the standard values, indicating the effects of the UMTs. We also detected residual OCPs in all soil samples in the study area. The fuzzy mathematics assessment showed that the farmland soil quality around the uranium mill tailing pond at site 1 belongs to class II, while sites 2–6 belong to class I. Based on the above conclusions, in the present study most of the farmland soils were suitable for growing crops except for the areas near the UMT pond (0–500 meters).
Key words: Uranium mill tailing / radionuclide / heavy metal / organochlorine pesticides / fuzzy mathematics
© EDP Sciences 2016
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