黑河流域梯级库区沉积物氮磷营养盐和重金属分布特征及污染评价

王昱, 范逸扬, 袁辉, 王哲辉, 先锋云, 田苗, 袁兴鹏

Characteristics and assessment of nutrient and heavy metal pollution in the cascade reservoir sediments of the Heihe River Basin

Yu Wang, Yiyang Fan, Hui Yuan, Zhehui Wang, Fengyun Xian, Miao Tian, Xingpeng Yuan

表3 重金属背景值和毒性系数

Table 3 Heavy metal background values and toxicity factors

重金属 As Cd Cu Mn Ni Pb Zn Cr 青藏高原土壤背景值/(mg·kg-1) 19.27 0.141 24.27 617.36 55.86 32.15 75.59 155.54 毒性系数 10 30 5 1 5 5 1 2