摘要
氟是与人体健康密切相关的微量元素,人体摄入氟元素不足或过量均会对健康产生危害。文章通过在河南扶沟地区采集不同深度以及不同岩性的土壤样,采用碱熔法和离子选择电极法测定土壤中的总氟和水溶性氟含量,探讨土壤中氟的垂向分布特征及其与土壤岩性的关系。认为土壤中的氟在垂向上的分布表现为:在土壤浅表,土壤氟含量随土壤埋深的增加呈先增大后减小趋势;在较大埋深的土壤中,氟含量随土壤深度的增加以及土壤岩性的变化而呈现波动;不同岩性的土壤中氟含量差异很大,不同岩性中的土壤氟含量与岩性颗粒的粒径大小有一定关系,其中在粘性土壤中,土壤颗粒粒径小,比表面积大,透水性差,氟含量高,而在砂土中,土壤颗粒粒径大,比表面积小,透水性好,氟含量较低。
Fluorine as a trace element be harmful to human health. Different is closely related to human health, whatever fluorine intake is excessive or lack, it can soil samples were collected at＇ various depths in Fugou area, and content of total and water-soluble fluorine in the studied soil was determined by alkali fusion and ion selective electrode method, while the verti- cal distribution characteristic of fluorine in the soil and its relationship with the lithology was analyzed. Vertical distribution characteristics of fluorine in the soil revealed that fluorine content first increased, and then it decreased with the depth in the top soils. In greater depth of soil, the fluorine content fluctuated with the increment of depth and the changes in soil lithology, and also the fluorine contents have great differences between different lithology of soil, and the fluorine contents in different soil have a certain relationship to the particle＇s size. Whereas in the clay soil layers, the particle＇s size was small and it has large specific surface area and poor permeability, so its fluorine content was high. Meanwhile in the sand layer, with large particle＇s size, small specific surface area and high permeability, its fluorine content was low.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第10期49-52,共4页
Environmental Science & Technology
关键词
氟
分布规律
土壤岩性
扶沟
fluorine
distribution
soil lithology
Fugou
