摘要
氟是人类必需的微量元素,缺乏或过量均会对人体健康产生不良影响。笔者对天津北部蓟州区水土环境中氟的地球化学特征及其环境质量进行研究,结果表明:表层土壤中氟含量在201×10-6~8545×10-6,平均为757×10-6,平均含量是天津市表层土壤背景值的1.25倍,是全国的1.58倍;在土壤垂向剖面中,黏性土壤中氟含量相对高于砂性土壤;地下水氟含量在平原区平均为1.50 mg/L,山区平均为0.47 mg/L,平原区明显大于山区;全区超过90%的表层土壤氟含量表现为过剩和高水平,平原区地下水样品氟Ⅳ类和Ⅴ类水所占比例达61.54%;玉米样品氟超标比例为26.67%,最大超标倍数大于2倍。总体来说,津北表层土壤和平原区地下水中氟含量显著偏高,为高氟地区,部分大宗农产品中氟含量已经出现超标现象,应该引起有关部门重视。
Fluorine is a necessary trace element for human beings,and lack or excess of fluorine will exert adverse effects on human health.In this paper,the geochemical characteristics and environmental quality of fluorine in soil,groundwater and crops in Jizhou district of northern Tianjin were studied.The results are as follows:The fluorine content in surface soil ranges from 201×10-6 to 8545×10-6,with an average of 757×10-6.The average content is 1.25 times the background value of surface soil in Tianjin and 1.58 times that in China.In the vertical profile of soil,the fluorine content is higher in cohesive soil than that in sandy soil.The average fluoride content of groundwater in plain area is 1.50 mg/L and that in mountainous area is 0.47 mg/L.The fluoride content in plain area is obviously higher than that in mountainous area.Over 90%of the surface soil fluoride content in the region is excessive and high,and the proportion of groundwater samples of fluoride IV and V in plain area reaches 61.54%.The proportion of fluorine exceeding the standard in maize samples is 26.67%,with the maximum exceeding multiple over two times.Generally speaking,the fluorine content in surface soil and groundwater in the plain area of northern Tianjin is significantly higher than that in the high fluoride area.The fluorine content in some agricultural products has exceeded the standard,to which more attention should be paid by the relevant departments.
作者
王卫星
曹淑萍
李攻科
张亚娜
WANG Wei-Xing;CAO Shu-Ping;LI Gong-Ke;ZHANG Ya-Na(Tianjin Institute of Geological Survey,Tianjin 300191,China)
出处
《物探与化探》
CAS
北大核心
2020年第1期207-214,共8页
Geophysical and Geochemical Exploration
基金
中国地质调查局项目(12120113002000)
天津市国土资源和房屋管理局项目(国土房任[2014]32号).
关键词
蓟州区
氟
地球化学特征
环境质量
生态效应
Jizhou District
fluorine
geochemistry
environmental quality
ecological effect
