基于GCM_CB模型的土壤重金属污染评价  

Evaluation of soil heavy metal pollution based on GCM_CB model

作　　者：何厅厅[1] 赵艳玲[1] 李建华[1] 付馨[1] 王亚云[1] 曾纪勇[1] 

机构地区：[1]中国矿业大学(北京)土地复垦与生态重建研究所,北京100083

出　　处：《环境工程学报》2012年第10期3781-3786,共6页Chinese Journal of Environmental Engineering

基　　金：国土资源部公益性行业专项(201111016-04)

摘　　要：灰色聚类法已经运用于土壤重金属污染评价中,然而此法在确定聚类权重时仅考虑重金属浓度,忽略了衡量重金属毒性强弱的重要指标生物毒性指数。为了更客观和准确地反映土壤重金属的污染程度,将生物毒性指数引入到聚类指标权重中,构建GCM_CB(grey clustering method_concentration and biotoxicity)土壤重金属污染评价模型。通过对华东某地区的10个区域土壤重金属污染进行分析评价,并与常用评价方法对比研究,表明:其多数样点的评价结果基本一致,但针对样品4和样品9中的元素Hg,因其强毒性,使得评价等级由I级定为II级,从而提高了评价方法的灵敏度,更加符合该区域的实际土壤污染情况。Grey clustering method has been applied to the evaluation of soil heavy metal pollution.However,in the process of drawing clustering weights,this method only considers the heavy metal concentration and ignors its biotoxicity index which is an important indicator to measure the toxicity intensity of the heavy metal.In order to reflect the pollution levels of soil heavy metal more objectively and accurately,biotoxicity index was introduced into the clustering weights to build the GCM_CB soil heavy metal pollution evaluation model.Soil heavy metal data of 10 areas in eastern China were estimated,appraised and compared with other results evaluated by common evaluation methods.The conclusion is that the majority results are basically same except for sample 4 and sample 9.Their pollution level is changed from level I to level II for the element Hg with high toxicity,which improves the sensitivity of the evaluation method and makes it more coincided with the actual soil contamination of the area.

关 键 词：土壤 重金属污染 综合评价 生物毒性指数 

分 类 号：X825[环境科学与工程—环境工程]