Integrated regional ecological risk assessment of multiple metals in the soils: A case in the region around the Bohai Sea and the Yellow Sea
Integrated regional ecological risk assessment of multiple metals in the soils: A case in the region around the Bohai Sea and the Yellow Sea
复制标题
土壤中多种金属的区域综合生态风险评价——以环渤海、黄海地区为例
DOI：
10.1016/j.envpol.2018.06.058
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发表时间：
2018
影响因子：
8.9
通讯作者：
Xiuqing Shao
中科院分区：
文献类型：
--
作者：
Yajuan Shi;Xiangbo Xu;Qifeng Li;Meng Zhang;Jing Li;Yonglong Lu;Ruoyu Liang;Xiaoqi Zheng;Xiuqing Shao
本文提出了区域内多种污染物风险空间分布的量化与识别方法。通过利用现有的大量信息，进行了综合定量风险评估，以探讨单一污染物和多种污染物的风险的空间分布，以及基于当前污染物浓度和毒性数据的多种污染物的总体风险的大小。采用了两个目标标准等级--I级(基于NOEC/LOEC)和II级(基于LC/EC/IC50)，从而根据这两个等级对区域和次区域风险进行了评估。以环渤海和黄海地区为例，评价了多种有毒金属(As、Cd、Cr、Hg、Pb)对陆地生态系统的危害。区域重金属总生态风险I级为21.73%，II级为12.53%。风险大小顺序为：铬 >； ； >； 铅 >； Cd >； 汞，其中铬构成的生态风险最大，为I级的61.12%。二级生态风险排名前三的城市是沧州 >； 连云港 >； 盘锦，而一级生态风险排名前三的城市是沧州 >； 盘锦 >； 连云港。该方法提供了定量的风险评估，为风险管理提供了多个明确的保护级别。
Methodology to quantify and distinguish the spatial distribution of the risks from multiple pollutants within the region was developed in this paper. An integrated quantitative risk assessment was conducted by utilizing a large amount of information available to explore spatial distribution of risk by single and multiple pollutants, and the magnitude of the overall risk from multiple pollutants based on the current concentrations of pollutants and toxicity data. Two target criteria levels – level I (NOEC/LOEC based) and level II (LC/EC/IC50based) – were employed, and thus, the regional and sub-regional risks were evaluated according to these two levels. The risk of multiple toxic metals (As, Cd, Cr, Hg and Pb) to a terrestrial ecosystem for the region around the Bohai Sea and the Yellow Sea were evaluated as a case. The total overall ecological risks from heavy metals in the region for level I and level II were 21.73% and 12.53%, respectively. The risks were ranked in the order of Cr > As > Pb > Cd > Hg with Cr posing the greatest ecological risk, which was 61.12% for level I. The top three cities according to the level II ecological risk were Cangzhou > Lianyungang > Panjin, while the top three cities of level I ecological risk were Cangzhou > Panjin > Lianyungang. This method provides a quantitative risk assessment with multiple and clear protection levels for risk management.