松嫩平原湖泊底泥重金属空间变异特征及其风险评价

于万辉, 王俊杰, 臧淑英

The Spatial Variability Characteristics and Potential Ecological Risk Assessment of Heavy Metals of Lake Sediments in the Songnen Plain

Wan-hui YU, Jun-jie WANG, Shu-ying ZANG

表2 单项及综合潜在生态风险指数与分级标准

Table 2 Individual and general indices and grades of potential ecological risk assessment

$\begin{matrix} E_{r}^{i} \end{matrix}$	单项污染物生态风险等级	$\begin{matrix} RI \end{matrix}$	综合潜在生态风险等级
$\begin{matrix} E_{r}^{i} \end{matrix}$ <40	低	$\begin{matrix} RI \end{matrix}$ <135	低
40≤ $\begin{matrix} E_{r}^{i} \end{matrix}$ <80	中	135≤ $\begin{matrix} RI \end{matrix}$ <265	中等
80≤ $\begin{matrix} E_{r}^{i} \end{matrix}$ <160	较重	265≤ $\begin{matrix} RI \end{matrix}$ <525	重
160≤ $\begin{matrix} E_{r}^{i} \end{matrix}$ <320	重	525< $\begin{matrix} RI \end{matrix}$	严重
320≤ $\begin{matrix} E_{r}^{i} \end{matrix}$	严重