Guo Wei, Yin Shu-Hua, Xu Jian-Xin, Xu Dong-Yu, Gao Li, Hao Hong, Gao Bo
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450011, China.
Huan Jing Ke Xue. 2016 Sep 8;37(9):3333-3339. doi: 10.13227/j.hjkx.2016.09.011.
In order to investigate the pollution characteristics of vanadium in sediments of the Three Gorges Reservoir (TGR), 67 sediment samples were collected from the section between Chongqing to Yichang in TGR. The concentration and chemical speciation of vanadium were measured and the spatial distribution of vanadium was discussed. Current pollution level of vanadium in TGR sediments was assessed by index of geoaccumulation and Häkanson ecological risk index. The results showed that:1the range of vanadium concentrations in TGR was 89.4-175.2 mg·kg and the average concentration was 123.7 mg·kg, which was slightly higher than the background value in sediments of Yangtze River. 2the spatial distribution of vanadium in TGR sediments showed that vanadium concentrations in the mainstream of TGR were higher than those in tributaries and the vanadium contents in the sediments in downstream were higher than those in upstream in term of the mainstream of TGR. 3highest vanadium concentration was found in the sediment in a developed county, indicating that this high level of vanadium concentration was attributed to anthropogenic input. 4chemical forms of vanadium in sediments were mainly in residual state (80%-89%, mass fraction), which had a significant positive correlation with total concentrations in sediments. 5vanadium contamination degree and potential environmental risk in TGR sediments were weak.
为了研究三峡水库（TGR）沉积物中钒的污染特征，从三峡水库重庆至宜昌段采集了67个沉积物样本。测定了钒的浓度和化学形态，并探讨了钒的空间分布。采用地累积指数和哈坎森生态风险指数对三峡水库沉积物中钒的当前污染水平进行了评估。结果表明：1.三峡水库钒浓度范围为89.4 - 175.2 mg·kg，平均浓度为123.7 mg·kg，略高于长江沉积物背景值。2.三峡水库沉积物中钒的空间分布表明，三峡水库干流中的钒浓度高于支流，就三峡水库干流而言，下游沉积物中的钒含量高于上游。3.在一个发达县的沉积物中发现钒浓度最高，表明这种高浓度的钒归因于人为输入。4.沉积物中钒的化学形态主要以残渣态为主（质量分数为80% - 89%），与沉积物中总浓度呈显著正相关。5.三峡水库沉积物中钒的污染程度和潜在环境风险较弱。
