基于文献数据的广西典型土壤铅含量特征及其风险研究

发布时间：2018-01-01 22:15

本文关键词：基于文献数据的广西典型土壤铅含量特征及其风险研究?　出处：《土壤学报》2017年01期 　论文类型：期刊论文

【摘要】：为阐述广西土壤铅含量现状及其潜在风险,通过检索20世纪90年代至今国内外关于广西土壤铅含量的文献,共筛选出目标文献57篇,涉及广西20多个地区,样品5 807个。结果表明,广西区土壤铅含量范围为18.80~6 350 mg kg-1,几何均值为147.9 mg kg-1。不同功能区的土壤铅含量分布存在较大差异,清洁土壤、城区土壤、工矿土壤、非矿区农用土壤和矿区农用土壤铅含量的几何均值分别为26.17、32.88、244.5、42.93和347.6 mg kg-1,分别是广西土壤铅背景值的1.391倍、1.747倍、12.99倍、2.281倍、18.47倍。调查区域中铅污染指数大于1的样本占总量的23%,有7%的样本属于重度污染,主要分布在南丹县、融安县等地,这可能与该区域的矿业活动有关。基于广西区铅矿产分布及目前未涉及调查的区域,建议对重污染区南丹、金城江、环江、融安、阳朔和崇左县等地采取治理措施,对铅锌矿分布较多的大新县、武宣县、岑溪县、贺县等地区作进一步的调查研究。
[Abstract]:In order to expound the present situation and potential risk of soil lead content in Guangxi, 57 articles were selected by searching the literature on soil lead content in Guangxi from 1990s to now. The results showed that the content of lead in the soil of Guangxi was 18.806350 mg / kg-1. The geometric mean value was 147.9 mg 路kg ~ (-1). There were great differences in the distribution of lead content in different functional areas, such as clean soil, urban soil, industrial and mining soil. The geometric mean values of lead content in agricultural soil of non-mining area and in agricultural soil of mining area were 26.17 ~ 32.84.5mg / kg-1 and 347.6 mg / kg-1, respectively. Compared with the background value of soil lead in Guangxi, it was 1.391 times 1.747 times and 12.99 times (2.281 times). 18.47.The samples with lead pollution index greater than 1 accounted for 23% of the total, and 7% samples belonged to severe pollution, mainly distributed in Nandan County, Rongan County and other places. This may be related to mining activities in the region. Based on the distribution of lead minerals in Guangxi and the areas not currently under investigation, it is recommended that the heavily polluted areas Nandan, Jincheng, Huanjiang and Rongan be treated. Yangshuo and Chongzuo County, etc., take measures to investigate and study the areas of Daxin County, Wuxuan County, Cengxi County and he County, where the lead and zinc ore are distributed more widely in Daxin County, Wuxuan County, Cengxi County, he County and so on.
【作者单位】：桂林理工大学环境科学与工程学院;
【基金】：广西自然科学基金项目(No.2013GXNSFEA053002) “八桂学者”建设工程专项经费和国家自然科学基金项目(41261082)共同资助~~
【分类号】：X53
【正文快照】： 铅广泛分布于环境中,是我国《重金属污染综合防治“十二五”规划》中的5种优先控制污染物之一[1],也是联合国粮食及农业组织(FAO)和世界卫生组织(WHO)公布的对人体产生毒性最强的三种金属之一[2]。研究发现,地壳岩石中的铅平均含量为16 mg kg-1,世界范围内土壤铅平均含量通常

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