Jiao Fengchao, Ren Lijun, Wang Xu, Liu Wenjie
School of Environmental Science and Engineering, Shandong University, 27# Shanda South Road, Jinan, 250100, Shandong Province, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Jun;24(17):15001-15011. doi: 10.1007/s11356-017-9056-8. Epub 2017 May 10.
The spatial-temporal changing characteristics and potential ecological risk combined with local policies and industrial status were analyzed. The metal contamination was studied by sediment quality guidelines (SQGs), potential ecological risk index (PERI), and geoaccumulation index (I ) of metals (Hg, Cr, Cd, As, Pb, and Cu) in the sediments of Xiaoqing River in Jinan from 1996 to 2014. Results showed that the concentrations of metals were in fluctuation and had a decreasing trend in the past 19 years, which was influenced by industry and policy. The concentrations of metals from upstream to downstream presented a change from low to high and then a gradual decrease which were mainly related to anthropogenic activities. The assessment suggested that Hg presented the highest levels of I and was the largest contributor to RI, while Cd was the second contributor. This finding indicated that Hg and Cd had a strong effect on potential ecological risk. Damatou had the largest pollution level and potential ecological risk, whereas Mulizhuang was the least polluted area. SQGs indicated that Cd was below the TEC while it was the second contributor to potential ecological risk. Indeed, the pollution control of Xiaoqing River had a certain effect, but it needs long-term effective management measures and a strengthened source control. The suggestions of targeted management have been proposed in the paper.
结合当地政策和产业状况，分析了时空变化特征及潜在生态风险。采用沉积物质量基准（SQGs）、潜在生态风险指数（PERI）和金属（汞、铬、镉、砷、铅和铜）的地累积指数（Igeo），对1996年至2014年济南小清河沉积物中的金属污染进行了研究。结果表明，金属浓度呈波动变化，在过去19年呈下降趋势，这受工业和政策的影响。金属浓度从上游到下游呈现出先由低到高然后逐渐降低的变化，这主要与人为活动有关。评估表明，汞的Igeo水平最高，是潜在生态风险指数（RI）的最大贡献者，而镉是第二大贡献者。这一发现表明汞和镉对潜在生态风险有很强的影响。码头污染水平和潜在生态风险最大，而睦里庄是污染最轻的区域。沉积物质量基准表明镉低于效应浓度阈值（TEC），但其是潜在生态风险的第二大贡献者。事实上，小清河的污染控制有一定成效，但仍需要长期有效的管理措施和加强源头控制。本文提出了针对性管理建议。
