青岛市土壤重金属污染的物元可拓评价
发布时间：2018-11-12 08:20
【摘要】：鉴于u6各个单因素评价得到的评价结果存在一定的矛盾性,从而导致土壤重金属污染程度存在不确定性的特点,研究中引入了物元理论和可拓集理论,建立了土壤重金属污染的物元可拓模型.对常规的污染物浓度超标赋权法进行了修正,引进了Hakanson毒性响应系数,使得评价因子的权重不仅能反映污染物浓度的超标状况,还与重金属的毒理性质有关,并将其与传统的定权方法进行对比,发现其修正效果显著,突显了重金属的潜在危害程度.以青岛市为例进行评价方法实证分析:共采集83个土壤样品,在对表层土壤中的Cu、Pb、Zn、Cr、Cd、As6种重金属元素含量进行分析的基础上,采用修正后的重金属权重以及物元可拓模型进行评价;评价结果表明青岛市土壤重金属污染等级以清洁一尚清洁为主,极个别采样点存在轻度或中度污染;模糊数学法评价结果与物元可拓模型的评价结果基本一致,验证了物元可拓模型应用于土壤重金属污染评价的可靠性.
[Abstract]:In view of the fact that the evaluation results obtained by U6 single factor evaluation are contradictory to a certain extent, which leads to uncertainty in the degree of heavy metal pollution in soil, matter-element theory and extension set theory are introduced into the study. The matter-element extension model of soil heavy metal pollution was established. In this paper, the conventional weighting method of pollutant concentration exceeding the standard is revised, and the Hakanson toxicity response coefficient is introduced. The weight of the evaluation factor can not only reflect the exceeding standard of pollutant concentration, but also be related to the toxicological properties of heavy metals. By comparing it with the traditional weight determination method, it is found that the correction effect is remarkable, which highlights the potential harm degree of heavy metals. Taking Qingdao as an example, 83 soil samples were collected and the contents of Cu,Pb,Zn,Cr,Cd,As6 heavy metals in surface soil were analyzed. The modified heavy metal weight and matter-element extension model were used to evaluate; The results showed that the grade of soil heavy metal pollution in Qingdao was mainly clean and still clean, and there was slight or moderate pollution in a few sampling sites. The result of fuzzy mathematics method is basically consistent with that of matter-element extension model, which verifies the reliability of the application of matter-element extension model to the assessment of soil heavy metal pollution.
【作者单位】： 中国地质大学(武汉)环境学院;
【基金】：“十二五”国家科技支撑计划项目(2012BAJ11B04)
【分类号】：X825
[Abstract]:In view of the fact that the evaluation results obtained by U6 single factor evaluation are contradictory to a certain extent, which leads to uncertainty in the degree of heavy metal pollution in soil, matter-element theory and extension set theory are introduced into the study. The matter-element extension model of soil heavy metal pollution was established. In this paper, the conventional weighting method of pollutant concentration exceeding the standard is revised, and the Hakanson toxicity response coefficient is introduced. The weight of the evaluation factor can not only reflect the exceeding standard of pollutant concentration, but also be related to the toxicological properties of heavy metals. By comparing it with the traditional weight determination method, it is found that the correction effect is remarkable, which highlights the potential harm degree of heavy metals. Taking Qingdao as an example, 83 soil samples were collected and the contents of Cu,Pb,Zn,Cr,Cd,As6 heavy metals in surface soil were analyzed. The modified heavy metal weight and matter-element extension model were used to evaluate; The results showed that the grade of soil heavy metal pollution in Qingdao was mainly clean and still clean, and there was slight or moderate pollution in a few sampling sites. The result of fuzzy mathematics method is basically consistent with that of matter-element extension model, which verifies the reliability of the application of matter-element extension model to the assessment of soil heavy metal pollution.
【作者单位】： 中国地质大学(武汉)环境学院;
【基金】：“十二五”国家科技支撑计划项目(2012BAJ11B04)
【分类号】：X825
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