铜陵市新桥矿区土壤重金属污染评价及源解析研究-王银泉.docx

《铜陵市新桥矿区土壤重金属污染评价及源解析研究-王银泉.docx》由会员分享，可在线阅读，更多相关《铜陵市新桥矿区土壤重金属污染评价及源解析研究-王银泉.docx（97页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、单位代码： 10359 _ 密级： _ 学 号： 201111170946 分类号： X142 Hefei University of Technology 硕士学位论文 MASTER9S DISSERTATION 论文题目： 铜陵市新桥矿区土壤重金属 污染评价及源解析研究 学位类别： _ 学历硕士 专业名称： _ 环境科学 _ 作者姓名： _ 王银泉 _ 导师姓名： _ 周 涛 发 教 授 完成时间： _ 二 0 四年四月 合肥工业大学 学历硕士学位论文 铜陵市新桥矿区土壤重金属 污染评价及源解析研究 作者姓名： _ 王银泉 指导教师： 周 涛 发 教 授 学科专业： _ 环境科学 研究方向

2、： 环境评价理论与方法 2014年 4月 A Dissertation Submitted for the Degree of Master Pollution Assessment and Source Apportionment of Heavy Metals in Soils around XinQiao Mining Area in Tongling, Anhui Province By Wang Yinquan Hefei University of Technology Hefei, Anhui, P.R.China April, 2014 合 肥 工 业 大 学 本论文经答辩委员

3、会全体委员审查，确认符合合肥工业大 学学历硕士学位论文质量要求。 答辩委员会签名：（工作单位、职称、姓名 ） 主席：安徽省环保厅，高工， 委员：合肥工业大学，教授 , 合肥工业大学，教授， 合肥工业大学，教授， 合肥工业大学，副教授 , 导师：合肥工业大学，教授， 学位论文独创性声明 本人郑重声明 . 所呈交的学位论文是本人在导师指导下进行独立研究工作所 取得的成果。据我所知，除了文中特别加以标注和致谢的内容外，论文中不包含 其他人已经发表或撰写过的研究成果，也不包含为获得 合肥工业大学 或其他 教育机构的学位或证书而使用过的材料。对本文成果做出贡献的个人和集体，本 人已在论文中作了明确的说明

4、，并表示谢意。 学位论文中表达的观点纯属作者本人观点，与合肥工业大学无关。 学位论文作者签名 . i瓴象 签 名 日 期 ： 年 令 月 日 学位论文版权使用授权书 本学位论文作者完全了解 合肥工业大学 有关保留、使用学位论文的规定， 即：除保密期内的涉密学位论文外，学校有权保存并向国家有关部门或机构送交 论文的复印件和电子光盘，允许论文被查阅或借阅。本人授权 合肥工业大学 可 以将本学位论文的全部或部分内容编入有关数据库，允许采用影印、缩印或扫描 等复制手段保存、汇编学位论文。 (保密的学位论文在解密后适用本授权书 ） 学位论文作者签名 ： i 像象 签 名 日 期 ： 冷 年 月 论文作者

5、毕业去向 工作单位 . 联系电话： 通讯地址： 指导教师签名： 签名曰期 soil organic matter of all samples was above four levels; the capacity to conserve water and fertilizer of soils around mining area was in medium level. The coefficients for the relationships between pH, cation exchange capacity (CEC) of the soils and the heavy m

6、etals were remarkable. The relationships between five kinds of heavy metals also showed a very significant correlation. These relationships indicated that the heavy metals in the soils around the mining area had the same pollutant source. The surface soils around XinQiao mining area had been serious

7、ly polluted by Cu, Pb, Zn, Cd, As. Nemerow Comprehensive Pollution Index showed that mining activities of XinQiao had caused a serious impact on soils around it, and the pollution contribution rate of Cd was the highest of all. The Geo-accumulation Index showed that mining activities had resulted in

8、 significant accumulation of heavy metals in soils around mining area, the order of contamination degree of heavy metals was CdCuPbAsZn. The Potential Ecological Risks Index showed that Cd was the predominant risk factor followed by Cu, Pb, As. The pollution contribution of Zn was very small. Becaus

9、e of mining actives, excess levels of heavy metals had been found in the soil profile. The relative degree of pollution was in the order of CdCuAsZnPb. The activity of each element in the 0 20cm surface soils was significantly higher than that of deeper soils. The conteecological harmfulness was the

10、 greatest. The speciations of heavy mentals awere varied. The active form of Cd was highest resulting in the highest ecological risk. As had little harm which mainly existed in residual form. The Fe-Mn oxides form, Carbonate bounded form and organic form of Cu, Pb and Zn were higher, the ecological

11、risks of these elements were controlled by oxidation-reduction condition and pH. The XRD and SEM-EDS characterization techniques showed that there were minerals such as pyrite, galena in the seriously polluted soils. Pb isotope tracing research showed that about 61.93% 93.260% of Pb in the polluted

12、surface soils came from ores. The ratio of 206Pb/207Pb in the soil profile increased with soil depth increasing. The character of Pb isotope in the topsoil(0 20cm) closed to the character of ores. Cd isotope tracing research showed that the soils irrigated by flotation wastewater were enrichment of

13、Cd heavier isotopic compositions (the S114/110Cd ranged from 0.05% 0.24% ) while the soils which were not affected by flotation wastewater concentrated lower isotopic compositions of Cd (the 5114/110Cd ranged from -0.02% -0.28% ).As a result, pollutant source of the former might be sphalerite, sider

14、ite and limonite etc.; while the latter might come from chalcopyrite, pyrite and galena etc. S isotope tracing research showed that the content and isotopic characteristics of S in the soils could be affected by mining activities and biological redox and the depth was less than 50cm. Key words： XinQiao Mining Area; Soils; Heavy Metals; Pollution Evaluation; Source Analysis