冀中南平原区土壤氟元素来源分析

冀中南平原区东部为河北省地方性氟中毒病的高发区。针对土壤异常高氟区,本文通过分析太行山基岩、第四纪火山活动、黄河泛滥和第四纪海侵等自然因素和大气降尘、化肥、灌溉水等人为因素,厘定了自然和人为因素对土壤中氟元素含量的影响和控制程度。得出冀中南平原深层土壤中氟元素含量变化总体上受地质背景控制,在此基础上第四纪火山活动、海侵和黄河泛滥对局部地区土壤氟元素含量具有较强烈影响。土壤异常区及地方病高发区土柱剖面氟及重金属元素含量变化也显示,土壤中氟元素含量变化明显受土壤质地的控制,后期人为作用叠加量很微弱。上述认识和结论为氟中毒地方病预防和治理提供了重要依据。

A source analysis of soil fluorine in central and southern Hebei plain

The central and southern plain of Hebei Province is a district with a high incidence of fluorine poisoning.This paper analyzed the natural and anthropogenic factors influencing F content of soil.The natural factors,such as Taihang Mountains bedrock,Quaternary volcanic activities,Yellow River flooding and Quaternary transgression were taken into consideration,and anthropogenic factors,such as rainfall,fertilizers and irrigation water,were also discussed.The results show that the overall change of fluorine in soil based on geological setting.Quaternary volcanic activities,Yellow River flooding and Quaternary transgression may exert strong influence on some areas.By analyzing the samples collected from fluorine soil anomalies and areas with a high incidence of endemic diseases,the authors conclude that soil texture is the main controlling factor,and the superposition extent of human influence is very weak.This means that fluorine in soil mainly comes from natural sources.The conclusions provide an important data for preventing and controlling of endemic fluorine poisoning.