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| 金昌市城区土壤重金属空间分布及潜在生态危害评价 |
| SpatialD istributionsof Heavy M etalsand Assessmentof Potential Ecological Risk in Jinchang Urban Area |
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| DOI： |
| 中文关键词: 金昌市 重金属 克立格插值 潜在生态危害评价 土壤 |
| 英文关键词: Jinchang Heavy metals Kriginginterpolation Potentialecologicalrisk assessment Soils |
| 基金项目:国家自然科学基金资助项目 (NSFC 40671167); 国家环境保护公益性基金资助项目 (NEPCP 200809098); “九七三 ”基金资助项目 (2008 CB 417212) |
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| 中文摘要: |
| 通过对金昌市区范围内74处土壤的取样研究分析, 结果表明 :Cd 、Cu 、Ni 、Pb 、Zn5 种重金属平均含量均超过当地土壤背景值, 其中以Cu 和Ni 最为显著, 其平均含量分别达到430 mg/kg 和361 mg/kg;5 种重金属变异系数均较大, 其中Cu和Ni 变异系数达到了115% 和123% , 属强变异性 ; 采用克立格最优内插法得到金昌市表层土壤重金属含量的空间分布图, 发现Cu和Ni呈局部污染态势 , 矿业开采和金属冶炼加工等工业活动是Cu和Ni最大的污染源;Pb 、Zn和Cd |
| 英文摘要: |
| The74 soilsampleswereanalyzed from Jinchang urban area. Theresultsshowedthattheaverage concentrationsofCd, Cu, Ni, Pb, Zn were more than thelocalbackground levels, especially Cu 430 mg/kg and Ni361 mg/kg. The variation ofcoefficientsofthe five elements were allin high levels, and Cu 115% and Ni123% ,to show strong variability. Sketch-mapsofspatialdistributionsofthe five heavymetalswereobtained by Kriginginterpolation toindicatethatmining and smelting had caused localpollution ofCu and Ni. The elementsofPb, Zn and Cd wereobviously accumulatedinthe whole urban area. Theindustrialactivitiesandtransportation had broughtabout;intermediate ecologicalrisk ofheavy metalpollution. |
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