Zhu Lin, Liu Jianwei, Xu Shiguo, Xie Zaigang
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China.
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China.
Ecotoxicol Environ Saf. 2017 Aug;142:454-463. doi: 10.1016/j.ecoenv.2017.04.039. Epub 2017 Apr 28.
Sediment cores from five reservoirs, located in the Liaoning and Jilin Provinces in Northeast China, were collected to investigate the accumulation and potential toxicity of heavy metals (Fe, Mn, Cu, Cd, Pb, Zn, and Cr) during a sampling campaign in February, 2015. The results showed that all the detected metals accumulated significantly, especially Cd, compared to their respective background values. Among these reservoirs, Biliuhe Reservoir had markedly increasing trends for organic matter and all the metals, among which Mn was elevated by 280% to 3411mg/kg in a core of only 18cm in depth. Xinlicheng Reservoir was characterized by heavy siltation and varying metal distribution due to its regular geometric features and pulsed flood events. The Enrichment factor (EF) and geo-accumulation index (I) indicated Cd was strongly enriched by anthropogenic inputs, with the values of EF and I greater than 8 and 3, respectively. The toxicity assessment calculated using consensus-based sediment quality guidelines (SQGs) implied the whole cores of Tanghe and Dahuofang and the upper cores of Biliuhe, Xinlicheng and Fengman exhibited toxicity to sediment-dwelling organisms. Cr contributed more to Q than the other heavy metals, because only Cr exceeded the probable effect concentration (PEC) despite its low enrichment. According to the results of correlation analysis (CA) and principal components analysis (PCA), mining industries and agricultural activities within the basin were the main anthropogenic pollution sources for these heavy metals.
在中国东北辽宁省和吉林省采集了五个水库的沉积物岩芯，以调查2015年2月采样期间重金属（铁、锰、铜、镉、铅、锌和铬）的积累情况及潜在毒性。结果表明，与各自的背景值相比，所有检测到的金属都有显著积累，尤其是镉。在这些水库中，碧流河水库的有机物和所有金属都有明显增加的趋势，其中一个深度仅18厘米的岩芯中锰含量提高了280%，达到3411毫克/千克。新立城水库由于其规则的几何形状和脉冲洪水事件，具有严重淤积和金属分布变化的特点。富集因子（EF）和地累积指数（I）表明，镉因人为输入而强烈富集，EF和I值分别大于8和3。使用基于共识的沉积物质量准则（SQGs）进行的毒性评估表明，汤河和大伙房水库的整个岩芯以及碧流河、新立城和丰满水库的上部岩芯对底栖生物具有毒性。铬对Q值的贡献比其他重金属更大，因为尽管其富集程度较低，但只有铬超过了可能效应浓度（PEC）。根据相关分析（CA）和主成分分析（PCA）的结果，流域内的采矿业和农业活动是这些重金属的主要人为污染源。
