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铅锌矿冶区水稻土氟污染状况及污染源分析Fluorine Pollution and Pollution Sources of the Paddy Soils in a Lead-Zinc Mining Area
邬卉, 吴川, 吴雪娥, 黄玲, 薛生国
氟污染, 水稻土, 矿区, 土壤健康指数, 地氟病Fluorine Pollution, Paddy Soil, Mining Area, Soil Health Index, Endemic Fluorosis
《Advances in Environmental Protection》, Vol.5 No.2, 2015-04-27
以华南某铅锌矿冶区周边农田为研究对象，利用网格布点法，系统调查研究区域水稻土氟污染状况，开展铅锌矿冶区周边农田土壤氟污染源分析。结果表明，水稻田土壤氟污染严重，73%的采样点土壤氟含量超过800 mg∙kg−1，土壤氟含量平均值高达1118 mg∙kg−1；土壤健康指数平均值为1.36，绝大部分采样区域处于土壤高氟污染区，易诱发地氟病；土壤pH值、铅锌含量与水稻土氟的分布存在相关关系，土壤氟含量与土壤pH值呈正相关，与土壤铅含量呈负相关；萤石矿开采和伴生萤石矿的开采是水稻土氟污染的主要来源。研究结果将为掌握当地土壤氟污染状况、预防地氟病发生、改善水稻田土壤环境提供科学依据。Fluorine pollution of a certain lead-zinc mining area and pollution sources of surrounding farmlands were investigated using mesh points method. The results showed that the fluorine pollution of the paddy soils was serious, with 73% of sampling areas higher than 800 mg∙kg−1, which would easily lead to endemic fluorosis. Average soil fluorine content was 1118 mg∙kg−1, and the average soil health index of fluorine was 1.36, and average soil pH was 5.40. Soil lead contents were ranged from 43 mg∙kg−1 to 4961 mg∙kg−1, with an average of 517 mg∙kg−1. Soil zinc contents were ranged from 83 mg∙kg−1 to 4620 mg∙kg−1, with an average of 650 mg∙kg−1. Moreover, fluorine contents were significantly positively correlated with pH (P