[1]谢 云,王延华,杨 浩.滇池西白沙小流域沉积物重金属污染及来源研究[J].南京师范大学学报(自然科学版),2017,40(04):120.[doi:10.3969/j.issn.1001-4616.2017.04.020]
　Xie Yun,Wang Yanhua,Yang Hao.Pollution and Sources Study of Heavy Metals in Sediments ofXi Baisha Small Watershed in Dianchi[J].Journal of Nanjing Normal University(Natural Science Edition),2017,40(04):120.[doi:10.3969/j.issn.1001-4616.2017.04.020]
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滇池西白沙小流域沉积物重金属污染及来源研究()
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《南京师范大学学报》（自然科学版）[ISSN:1001-4616/CN:32-1239/N]

卷:
第40卷
期数:
2017年04期
页码:
120
栏目:
·地理学·
出版日期:
2017-12-30

文章信息/Info

Title:
Pollution and Sources Study of Heavy Metals in Sediments ofXi Baisha Small Watershed in Dianchi
文章编号:
1001-4616(2017)04-0120-09
作者:
谢 云; 王延华; 杨 浩
南京师范大学地理科学学院,江苏 南京 210023
Author(s):
Xie Yun; Wang Yanhua; Yang Hao
School of Geography Science,Nanjing Normal University,Nanjing 210023,China
关键词:
滇池; 西白沙; 沉积物; 重金属
Keywords:
Dianchi; Xi Baisha; sediment; heavy metal
分类号:
X53
DOI:
10.3969/j.issn.1001-4616.2017.04.020
文献标志码:
A
摘要:
以滇池西白沙小流域为研究对象,研究沉积物中重金属Cu、Zn、Pb、Cd和Cr的污染状况和来源,结果表明:0～31 cm沉积柱对应沉积年代为 1881-2011 年,平均沉积速率约为 0.20 cm/a. 总体来说20世纪60年代之前各重金属在沉积物中的含量较低且较稳定,之后呈现上升趋势. 随时间推移,越接近沉积物表层重金属环境风险越大. 潜在生态危害指数法评价显示,Cu、Zn、Pb、Cd和Cr单一元素危害程度分别为:中等危害、中等危害、轻微危害、极强危害和轻微危害,危害指数RI整体表现为上升趋势,生态风险
Abstract:
Taking Xi Baisha small watershed in Dianchi as the study object,heavy metals of Cu,Pb,Cd,Zn and Cr pollution status and source in sediments were studied,and the results showed that:0-31 cm samples time was 1881-2011 in the deposition,the average sedimentation rate was about 0.20 cm/a. The contents of heavy metals in sediments were generally lower and more stable before 1960,and then showed up was ward trends. As time went on,the closer to the surface of the sediments was,the greater the environmental risk of heavy metals was. The potential ecological hazard index method showed that the damage degree of single elements in Cu,Zn,Pb,Cd and Cr were moderate,moderate,minor,extreme and minorand,and the hazard index RI showed an upward trend as a whole. The ecological risk of pollution mainly came from Cd elements. From the unstable content of different heavy metals,the heavy metals had great ecological harm to the environment. The order of risk was Cd>Zn>Cu>Cr>Pb. Pb and Cu,Zn and Cr in the sediments of the small watershed were significantly correlated at 0.05 level,and the correlation coefficients were 0.45 and 0.38. The extraction of three principal components of heavy metal pollution sources,analysised with industrial development in Yunnan area,the main sources of heavy metal pollution were:chemical wastewater emission of iron and steel accounted for 27.06%; mining processing and transportation of dust contribution rate was 25.03%,the contribution rate of mining processing wastewater was 21.94%,other sources accounted for 25.97%.

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备注/Memo

备注/Memo:
收稿日期:2017-08-20.
基金项目:国家自然科学基金重点项目(41030751)、国家自然科学基金面上项目(41673108).
通讯联系人:谢云,讲师,研究方向:生态环境修复. E-mail:xieyun@njnu.edu.cn
更新日期/Last Update: 2017-12-30