基于GCM_CB模型的土壤重金屬污染評價

更新時間：2014-07-17 16:27 來源：環(huán)境工程學(xué)報作者: 閱讀：2062

中文摘要:

灰色聚類法已經(jīng)運(yùn)用于土壤重金屬污染評價中,然而此法在確定聚類權(quán)重時僅考慮重金屬濃度,忽略了衡量重金屬毒性強(qiáng)弱的重要指標(biāo)生物毒性指數(shù),。為了更客觀和準(zhǔn)確地反映土壤重金屬的污染程度,將生物毒性指數(shù)引入到聚類指標(biāo)權(quán)重中,構(gòu)建GCMCB(grey clustering method_concentration and biotoxicity)土壤重金屬污染評價模型,。通過對華東某地區(qū)的10個區(qū)域土壤重金屬污染進(jìn)行分析評價,并與常用評價方法對比研究,表明:其多數(shù)樣點(diǎn)的評價結(jié)果基本一致,但針對樣品4和樣品9中的元素Hg,因其強(qiáng)毒性,使得評價等級由I級定為II級,從而提高了評價方法的靈敏度,更加符合該區(qū)域的實(shí)際土壤污染情況。

英文摘要:

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.

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