广西土壤和沉积物砷含量及污染分布特征

发布时间：2018-09-08 21:21

【摘要】：广西素有"有色金属之乡"美誉,土壤重金属污染问题较为突出。通过总结1989年以来相关文献,探讨了广西土壤和沉积物中砷含量及污染分布特征。3 045个和477个土壤和沉积物有效样点的统计分析表明,广西砷污染土壤主要分布于桂西北地区,尤其是刁江及金城江流域;矿业活动显著影响土壤砷积累,从其均值看:工矿区非农用土壤(140.5 mg/kg)工矿区农用土壤(80.68 mg/kg)非工矿区农用土壤(19.11 mg/kg)城区土壤(18.35 mg/kg),重度砷污染农用地样本均来自南丹;工矿区河流沉积物砷含量(283.5 mg/kg)远高于非工矿区,主要受影响区分布在刁江及大环江流域。为了控制环境风险,建议开展主要水系沉积物砷污染详查,加强南丹及周边区域污染防控和污染土壤修复。
[Abstract]:Guangxi is known as "the township of non-ferrous metals", and the pollution of heavy metals in soil is more prominent. By summarizing the relevant literature since 1989, the distribution characteristics of arsenic content and pollution in soils and sediments in Guangxi are discussed. The statistical analysis of available samples of 3.045 and 477 soil and sediment shows that arsenic contaminated soils in Guangxi are mainly distributed in northwest Guangxi. Especially in the Diaojiang and Jincheng River basins, mining activities significantly affected the accumulation of arsenic in soil. According to the average value, the non-agricultural soil (140.5 mg/kg), the agricultural soil (80.68 mg/kg), the agricultural soil (19.11 mg/kg) in urban area (18.35 mg/kg), the samples of agricultural land with severe arsenic pollution all come from Nandan. The arsenic content of river sediment (283.5 mg/kg) in industrial and mining area is much higher than that in non-industrial mining area, and the main affected area is in Diaojiang River and Dahuan River basin. In order to control environmental risk, it is suggested to carry out detailed investigation of arsenic pollution in sediments of major water systems, and to strengthen pollution prevention and control and remediation of contaminated soil in Nandan and its surrounding areas.
【作者单位】：桂林理工大学环境科学与工程学院;桂林理工大学广西环境污染控制理论与技术重点实验室;中国科学院地理科学与资源研究所;
【基金】：国家自然科学基金项目(41261082) 广西自然科学基金项目(2013GXNSFEA053002) 广西高等学校高水平创新团队及卓越学者计划项目(002401013001) “八桂学者”建设工程专项经费~~
【分类号】：X53;X131

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