Contamination and spatial distribution of heavy metals in soil of Xiangxi River water-level-fluctuating zone of the Three Gorges Reservoir, China

2017 ◽  
Vol 23 (4) ◽  
pp. 851-863 ◽  
Author(s):  
Xu Chao ◽  
Zhou Peijiang ◽  
Li Haiyan ◽  
Wang Huanhuan
Keyword(s):  
Heavy Metals ◽  
Spatial Distribution ◽  
Water Level ◽  
River Water ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Xiangxi River

scholarly journals Migration and Transformation of Heavy Metals in the Soil of the Water-Level Fluctuation Zone in the Three Gorges Reservoir under Simulated Nitrogen Deposition

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Liuyi Zhang ◽  
Kun Fu ◽  
Fumo Yang ◽  
Yang Chen ◽  
Chuan Fu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Diffusion Equation ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
N Deposition ◽  
Level Fluctuation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Water Level Fluctuation Zone

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.

Effects of seasonal water-level fluctuation on soil pore structure in the Three Gorges Reservoir, China

2018 ◽  
Vol 15 (10) ◽  
pp. 2192-2206 ◽  
Author(s):  
Shu-juan Zhang ◽  
Qiang Tang ◽  
Yu-hai Bao ◽  
Xiu-bin He ◽  
Feng-xia Tian ◽  
...  
Keyword(s):  
Pore Structure ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges
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