长江三峡库区江段沉积物的重金属污染特征

测定了三峡库区江段沉积物中２１个元素的含量，比例比配统计分析指出，重庆至涪陵江段的沉积物样品间无明显相关，涪陵至巴陵段的沉积物间在９０％置信水平上显著相关；沉积物中钙、镁、锶、钡、铁、钴、镍、镉、锰、锌、铝、钒、镧、钇、钛等元素间在９０％置信水平上有显著相关，伸砷、镉、铜、汞、铜、磷等元素间以及它们与上述元素间无显著相关，这表明涪陵以上江段的沉积物因受重庆和长春污染影响大，样品间的相似性小，而涪陵

HEAVY METAL POLLUTION IN SEDIMENTS FROMTHE THREE GORGE RESERVOIR AREA

Determination of 21 heavy metals in sediments from the Three GorgeReservoir area was conducted. The results of the ration matching analysis show thatthere is a good correlation among sediments in the Fulin-Badong reaches of theChangjiang River, but the low correlation in the Chongqing-Fulin reaches. This meansthat in the reaches the sedimentation is affected by municipal wastewater, andsimilarity among sediment samples is low, but the good similarity of samples from theFulin-Badong reaches because of light pollution. There seems to be in high correlationamong Mg, Sr, Ba, Fe, Co, Ni, Cr, Mn, Zn, Al, Ca, V, Y, Ti in sediments, thisindicates that the speciation of these elements in sediments is similar, the differencesof the correlation among As, Cd, Cu, Hg, Pb, P are considered that the speciation ofthe elements in sediments may be affected by pollution. Under conditions of limitinggrain size and constitute of sediments, values of mercury enrichment factor are 33-92, this confirms that sediments in the Three Gorge Reservoir Area reaches arepolluted by mercury. The analysis of Ef indicates that anthronogenic sources ofmercury are the high mercury background area of the southeast Sichuan province,China, Burning of coat with high content of mercury, mining and municipalwastewater.