Researches On The Source Of Heavy Metals And Pollution Analysis In Sediment Of Inner Mongolia Reach Of The Yellow River

Cities along the Inner Mongolia Reach of the Yellow River speed up the process of industrialization in recent years, so the Yellow River has been facing serious pollution threat, including heavy metal contamination. We selected 37 channel sampling points in Inner Mongolia Reach of the Yellow River and collected 111 samples and then analyzed elements. Potential Ecological Risk Index (RI), Pollution Load Index (PLI), Enrichment Factor (EF), Index of Geoaccumulation (Igeo) and Contamination Factor (CF) were used for assessment pollution. A low ecological risk level but moderate pollution of heavy metals were presented in Inner Mongolia section of the Yellow River. Zinc, Ni, Cu pollution levels reached up to significant pollution. Ti, Fe, Mn, Sr, V, Cr were moderate pollution levels. Nd, Ba were low pollution. Co, Bi, Al, W, Ce without pollution. Content of Al, Ba, Fe, Mn, Sr, Zinc, Ni, Cu, V was higher in Baotou and its lower watercourse, Maximum concentration of Al, Fe, Mn, V, Sr, Zinc, Ni, Cu, V occurred in sampling point21-23,27,29,31,33.Value of Co, W, Bi, Ce was relatively high in Baotou upper watercourse while was low in Baotou lower watercourse. The result of assessment pollution and the Principal Component Analysis (PCA), Q-model Cluster Analysis (CA), Pearson Correlation Coefficient Analysis were applied to analyzed source of the heavy metals. Co, W, Bi, Al, Ce, Nd came from natural sources, Ba, Sr, Ti, Fe, Mn, V, Zinc, Ni, Cu were affected by natural and human activities, as well as the influence of the Zinc, Ni, Cu mainly came from the artificial source, Cr was seriously affected by the Bayinnaoer industrial activities in site 3 and came from human and natural sources in the rest of the channel.