Guan Qingyu, Cai Ao, Wang Feifei, Wang Lei, Wu Tao, Pan Baotian, Song Na, Li Fuchun, Lu Min
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Gansu Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China.
Environ Sci Pollut Res Int. 2016 Dec;23(24):24768-24780. doi: 10.1007/s11356-016-7712-z. Epub 2016 Sep 22.
One hundred and eleven riverbed surface sediment (RSS) samples were collected to determine the heavy metal concentration throughout the Inner Mongolia reach of the Yellow River (IMYR), which has been subjected to rapid economic and industrial development over the past several decades. Comprehensive analysis of heavy metal contamination, including the enrichment factor, geo-accumulation index, contamination factor, pollution load index, risk index, principal component analysis (PCA), hierarchical cluster analysis (HCA), and Pearson correlation analysis, was performed. The results demonstrated that a low ecological risk with a moderate level of heavy metal contamination was present in the IMYR due to the risk index (RI) being less than 150 and the pollution load index (PLI) being above 1, and the averaged concentrations of Co, Cr, Cu, Mn, Ni, Ti, V, and Zn in the RSS, with standard deviations, were 144 ± 69, 77.91 ± 39.28, 22.95 ± 7.67, 596 ± 151, 28.50 ± 8.01, 3793 ± 487, 69.11 ± 18.44, and 50.19 ± 19.26 mg kg, respectively. PCA, HCA, and Pearson correlation analysis revealed that most of the RSS was heavily contaminated with Zn, Ni, and Cu, due to the influence of anthropogenic activities; moderately contaminated with Ti, Mn, V and Cr because of the dual influence of anthropogenic activities and nature; and slightly to not contaminated with Co because it occurs mainly in the bordering desert areas. Graphic abstract ᅟ.
采集了111个河床表层沉积物（RSS）样本，以测定黄河内蒙古段（IMYR）的重金属浓度。在过去几十年中，该河段经历了快速的经济和工业发展。对重金属污染进行了综合分析，包括富集因子、地累积指数、污染因子、污染负荷指数、风险指数、主成分分析（PCA）、层次聚类分析（HCA）和皮尔逊相关分析。结果表明，由于风险指数（RI）小于150且污染负荷指数（PLI）大于1，IMYR存在低生态风险且重金属污染程度为中等，RSS中Co、Cr、Cu、Mn、Ni、Ti、V和Zn的平均浓度及其标准差分别为144±69、77.91±39.28、22.95±7.67、596±151、28.50±8.01、3793±487、69.11±18.44和50.19±19.26mg/kg。PCA、HCA和皮尔逊相关分析表明，由于人为活动的影响，大多数RSS受到Zn、Ni和Cu的严重污染；由于人为活动和自然的双重影响，受到Ti、Mn、V和Cr的中度污染；由于Co主要出现在毗邻的沙漠地区，受到轻微至未受污染。图形摘要ᅟ。
