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贵阳中心区土壤氟地球化学特征及其环境风险评价
潘自平,刘新红,孟伟,李朝晋,何邵麟,晏承志,王芳,等
作者单位E-mail
潘自平 茅台学院 zipingpan@163.com 
刘新红 茅台学院  
孟伟 贵州省地质调查院  
李朝晋 贵州省地质调查院  
何邵麟 贵州省地质调查院  
晏承志 贵州省地质调查院  
王芳 贵州省地质调查院  
摘要:
本文利用贵州省多目标区域地球化学调查(贵阳中心区)(1:250000)项目数据,研究了贵阳市中心区土壤氟的地球化学分布特征,并采用全氟指数法对土壤氟环境质量及氟污染(异常)区的生态环境效应进行研究和评价,主要成果如下:(1)贵阳中心区土壤氟含量较高,表层土壤、深层土壤平均值(1143 mg.kg-1和1438 mg.kg-1),分别为全国相应层位土壤平均值的2.39倍和2.84倍,且空间分布变化较大。氟含量随土壤深度增加而升高,主要与土壤中粘土矿物组分有关。(2)不同类型土壤中氟含量变化较大,排列顺序为粗骨土>黄壤>石灰土>紫色土>水稻土;不同土地利用土壤氟含量差别较小,排列顺序为林地>建设用地>水田>草地>旱地>园地。(3)成土母质(岩)是影响土壤氟含量决定因素,是土壤氟的主要物质来源,土壤氟与成土母岩(质)具有一定的继承性;同时,由于在母岩风化成土过程中,土壤中氟存在一定程度富集,土壤比其成土母岩氟含量更高。(4)全氟指数法土壤氟环境质量评价结果表明,研究区土壤存在局部氟污染(异常)(占13.6%),且62%土壤为警戒区,而清洁区和安全区面积不足25%。(5)贵阳市土壤氟污染地区,农作物和地下水均遭到一定程度氟污染,土壤氟污染对生态环境及人体健康的威胁已初步显现,建议政府部门及科研工作者应予以足够的重视。
关键词:  贵阳中心区  土壤    地球化学特征  环境质量评价  环境效应
DOI:
分类号:
基金项目:贵州省优秀科技教育人才省长专项资金项目(黔省专合字(2012)27号);全国多目标区域地球化学调查项目(GZTR20070110)
Geochemical characteristics of fluorine in soils and its environmental risk in central district of Guiyang
panziping,刘新红,et al
Abstract:
Based on the data of multi-target regional geochemical survey of Guizhou province (central district of Guiyang)(1:250000), distribution features of fluorine were studied in soils of central district in Guiyang city, furthermore soils environmental quality of fluorine and its environmental effects were studied and evaluated by index methods of total fluorine . Study results showed that fluorine content was high relatively, whose average value in surface and deep soils with 1143 mg.kg-1and 1438 mg.kg-1,was as 2.39 times and 2.84 times as national soils,and varied greatly in spatial distribution. In vertical profile of soil, fluorine content increased with increase of soil depth, Mainly related to composition of clay. Fluorine content varied with different type of soil , and decreased in the order as follows: skeleton soil>yellow soil>limestone soil>purple soil>paddy soil. Land use type had certain influences upon fluorine content as follows: forest land>construction land >paddy field>grassland>dry land garden >garden plot. Soil parent rock or material is determinant factor which influence fluorine content of soil and the main material source , so soil fluorine has certain inheritance from the rock. Meanwhile, because of existing a certain degree enrichment of fluoride in the process of weathering of rocks to soils, fluorine content in soils is higher than its parent rock. The evaluation results of soil environmental quality to fluorine element using total fluorine index methods indicated that study area exist fluorine pollution or abnormity partly, furthermore, 62 % area of soil reached to alert degree, but the clean area and safety area is less than 25 %. The survey results showed that Crops and groundwater were both contaminated with fluorine in some region of soil fluorine pollution in Guiyang city, and it is appeared slowly that threat on ecological environment and human health of soil fluorine pollution. Therefore, it is recommended that the relevant governmental departments and science researchers should pay attention to soil pollution of fluorine heavily.
Key words:  Central area of Guiyang  Soils  Fluorine  Geochemistry feature  Environment evaluation  Environment effect