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Migration and Transformation of Heavy Metals in the Soil of the Water-Level Fluctuation Zone in the Three Gorges Reservoir under Simulated Nitrogen Deposition
Zhang, Liuyi1,2; Fu, Kun1; Yang, Fumo1,2,3; Chen, Yang1,2; Fu, Chuan1; Huang, Yimin1; Guo, Zhengjun1; Li, Tingzhen1
2021-02-19
摘要The accumulation of heavy metals (HMs) in the water-level fluctuation zone (WLFZ) of the Three Gorges Reservoir (TGR) area is potentially harmful to the water environment. In order to reveal whether nitrogen (N) deposition is a potential driving factor for the migration and transformation of HMs (Cd, Cr, Cu, Ni, and Pb), a simulated N deposition experiment was performed on the soil in the WFLZ of the TGR. The results showed that the accumulative release amounts of HMs increased with the increase of N deposition. It was found that the Elovich equation, double-constant equation, and parabolic diffusion equation could well describe the release process of Cu, Cd, Cr, and Ni, while the double-constant equation, parabolic diffusion equation, and first-order equation could be applicable for Pb. The exchangeable fractions of HMs increased to varying degrees after the N deposition treatment, wherein Ni was most significant, indicating that N deposition could increase the ecological risk of HM pollution in the TGR area. The results provide insight into the major factors affecting the release of different HMs under N deposition in this vulnerable region ecologically.
DOI10.1155/2021/6660661
发表期刊JOURNAL OF CHEMISTRY
ISSN2090-9063
卷号2021页码:10
通讯作者Yang, Fumo(fmyang@scu.edu.cn) ; Li, Tingzhen(litingzhen@163.com)
收录类别SCI
WOS记录号WOS:000625109300001
语种英语