苏州一些地区内土壤重金属污染研究及评价

发布时间：2018-05-07 01:27

本文选题：土壤 + 重金属　；参考：《苏州大学》2015年硕士论文

【摘要】：在我国,随着工业化、现代化、城镇化的步伐不断加快,环境污染问题已日趋严重,尤其是土壤污染问题更为突出,严重影响了农产品的质量安全和人们的身体健康。人们已经越来越重视土壤重金属污染,但是对受到人类活动强烈影响的不同功能区内土壤的重金属污染研究还比较少。因此,本文以苏州一些地区为选定区域,研究其不同功能区内土壤中Hg、As、Pb、Cd、Cr、Ni和Zn七种重金属的含量以及分布情况。通过单因子指数、内梅罗综合污染指数、污染负荷指数和地积累指数相结合的方法对苏州一些地区内的土壤重金属污染情况进行质量评价。最后,还运用潜在生态危害指数,对区域内的土壤重金属污染进行潜在的生态风险分析与评价。本文的主要研究结果如下：①这些区内的土壤pH值均值为7.57,呈微碱性,这是城市土壤的一个显著性的特征；②土壤重金属单项潜在生态风险指数从大到小为HgCdPbAsZnNiCr;区内汞和镉的污染指数比较大,是主要污染物。变异系数以汞和镉较大；③不同功能区土壤重金属元素综合污染指数按以下顺序递减：工业区(4.53)商业区(1.83)教育区(1.29)住宅区(0.98)风景区(0.45)；重金属污染负荷指数依次分别为：工业区(2.15)商业区(1.33)住宅区(1.16)教育区(0.83)风景区(0.60)。
[Abstract]:In our country, with the industrialization, modernization and the accelerating pace of urbanization, the problem of environmental pollution has become more and more serious, especially the problem of soil pollution, which has seriously affected the quality and safety of agricultural products and the health of people. People have paid more and more attention to heavy metal pollution in soil, but there are few researches on heavy metal pollution in different functional areas which are strongly affected by human activities. Therefore, the contents and distribution of seven heavy metals in soils of different functional areas of Suzhou were studied. The soil heavy metal pollution in some areas of Suzhou was evaluated by the methods of single factor index, Nemero comprehensive pollution index, pollution load index and accumulation index. Finally, the potential ecological risk analysis and evaluation of soil heavy metal pollution in the region are carried out by using potential ecological hazard index. The main results of this paper are as follows: (1) the average pH value of soil is 7.57, which is a significant feature of urban soil. (2) the single potential ecological risk index of heavy metals in soil is HgCdPbAsZnNiCr-HgCdPbAsZnNiCr-HgCdPbZnNiCr.The pollution index of mercury and cadmium in this area is relatively large and is the main pollutant. The coefficient of variation was higher in mercury and cadmium; (3) the comprehensive pollution index of soil heavy metals in different functional areas decreased according to the following order: industrial area 4.53) Commercial District 1.83) Education District 1.29) Residential area 0.98) Scenic area 0.45m; heavy Metal pollution load Index: industrial area 2.15) Commercial District 1.33) Residential area 1.16) Education area 0.83) Scenic area 0.60.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X53;X825

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