收稿日期: 2007-08-06
修回日期: 2008-02-19
网络出版日期: 2008-03-10
基金资助
国土资源部公益类专项资助项目“区域地球化学基线与大型矿山及矿集区环境评价示范”（编号：30302408-01）资助.
Potential Ecological Risk Analysis of Heavy Metals Contamination Based on GIS Methods in Sediments of Dexing, Jiangxi Province, China
Received date: 2007-08-06
Revised date: 2008-02-19
Online published: 2008-03-10
矿山开发必然对矿区及周边地区的生态环境造成危害。对矿山及其周边地区的生态环境进行现状调查和评价，为生态环境治理客观依据，显得极为重要。在江西德兴地区，系统采集该区域330个水系沉积物样品，并采用X荧光光谱仪和电感耦合等离子原子发射光谱仪为主体的分析配套方案分析样品中重金属的含量基础上，采用潜在生态危害指数法和GIS空间分析技术研究该地区的水系沉积物重金属污染的潜在生态危害。研究结果表明，德兴地区水系沉积物重金属污染的潜在生态危害范围较大，强—很强的生态危害区主要集中德兴铜钼和铅锌矿区、德兴河与大坞河流域及其周边地区，而乐安河下游沿岸以及乐平附近与西北部景德镇附近的少数煤矿区、婺源县城附近和东南角玉山县北西的铜钼矿点附近地区主要为零星中等生态危害。
陈翠华 , 何彬彬 , 张成江 , 倪师军 . 基于GIS技术的江西德兴地区水系沉积物重金属污染的潜在生态危害研究[J]. 地球科学进展, 2008 , 23(3) : 312 -322 . DOI: 10.11867/j.issn.1001-8166.2008.03.0312
It is very important to investigate and assess ecological environment quality of mines and neighborhood areas for ecological environment monitoring and protection. In order to assess the potential ecological risk of heavy metals contamination in sediments resulting from past mining activities in Dexing region, 330 Sediment samples in Dexing region were collected and analyzed for As, Hg, Cd, Cr, Zn, Cu and Pb in 2004. Heavy metal levels were determined using inductively couple plasma atomic emission spectrometry and X-ray fluorenscence spectrometry procedures. The contents of sediments samples reported concentrations between 3.070~1 109 mg/kg for As, 0.015~5.430 mg/kg for Hg, 0.035~13.5 mg/kg for Cd, 7~236 mg/kg for Cr, 22~1 770 mg/kg for Zn, 5~4 390 mg/kg for Cu, and 15~1 685 mg/kg for Pb, respectively. Meanwhile, The potential ecological risk was to assess with potential ecological risk was assessed with potential ecological risk coefficient ranged form 2.362~853.077 for As, 2.000~621.000 for Hg, 5.250~2025.00 for Cd, 0.250~8.4290 for Cr, 0.134~10.793 for Zn, 0.588~516.471 for Cu and 2.174~244.203 for Pb respectively. The potential ecological risk index ranged form 27.597~3747.572. Meanwhile, GIS (Geographic Information System) spatial analysis methods were adopted to represent the spatial distribution of heavy metal contamination. The results of the assessment indicated consistently that there were different extents of potential ecological risk of As, Hg, Cd, Cu and Pb, especially in the areas of the Dexing river and Dawu river around Dexing mines, along the lower courses of Le'an river, some coal mines in the northwest.
Key words： GIS; Dexing; Jiangxi. ; Heavy metals; Sediments; Potential ecological risk
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