哈密市典型煤矿区重金属污染特征、生态风险评价及来源解析

李泽龙, 汪亘, 王永莉, 魏志福, 张婷, 马雪云, 张小梅, 陈建珍, 吴保祥, 吴应琴, 秦小光

Pollution characteristics，ecological risk assessment，and source analysis of heavy metals in the coal mining areas of Hami， Xinjiang， China

Zelong Li, Gen Wang, Yongli Wang, Zhifu Wei, Ting Zhang, Xueyun Ma, Xiaomei Zhang, Jianzhen Chen, Baoxiang Wu, Yingqin Wu, Xiaoguang Qin

表3 潜在生态风险评价分级标准

Table 3 Criterian of potential ecological risk assessment

$E_{i}$	$P E R I$	生态危害程度分级
$E_{i}$ ≤40	$P E R I$ ≤150	轻微
40< $E_{i}$ ≤80	150< $P E R I$ ≤300	中度
80< $E_{i}$ ≤160	300< $P E R I$ ≤600	强
160< $E_{i}$ ≤320	$P E R I$ >600	极强
$E_{i}$ >320