摘要
长期饮用高碘水(>150μg/L)将对人体造成危害。中国有12个省市存在高碘地下水,主要分布在干旱半干旱内陆盆地区、冲洪积平原区和沿海地区,黄淮海平原是高碘地下水的主要分布区,在分析华北平原、淮海流域平原高碘地下水分布特征及成因的基础上,指出地下水中的碘主要是海洋碘通过大气输入,受此影响近海地区含水层碘含量往往较高;由河湖相地层组成且富含有机质、粘土矿物和铁铝氧化物的含水层有利于碘的富集;呈中-碱性的灰岩风化层土壤也有利于碘的富集,其中的碘通过水循环进入地下含水层,形成高碘地下水区。在此基础上,针对《生活饮用水卫生标准(GB5749-2006)》碘限值规定的缺项和《地下水质量标准(GB/T14848-93)》碘限值规定的不足,提出了地下水质量标准中碘限值修改的建议。
High iodine water is harmful to human health. High iodine groundwater is distributed around arid and semi arid inland basins, fluvial plains and coastal areas, which cover 12 provinces and autonomous regions in China. Huanghuaihai plain is a major region of high iodine groundwater. This paper points out that the source of iodine in groundwater is derived from the sea and brought in through atmosphere cycle, so iodine in the coastal aquifer, such as coastal aquifer of Huabei plain and that of Huaihe river plain, is usually high. The aquifer composed of alluvial and lake deposited materials with rich organic matter, ferric oxide and aluminum oxide often has high iodine, and the weathering crust of limestone possesses strong adsorption capacity for iodine. At last, this paper gives some suggestions for modification of iodine indexes in Groundwater Quality Standard（GB/T14848-93）》of China.
出处
《中国地质》
CAS
CSCD
北大核心
2010年第3期797-802,共6页
Geology in China
基金
中国地质调查局地质大调查项目(1212010634700)资助
关键词
地下水
高碘
限值
建议
high iodine
groundwater
iodine Index and suggestion
