铅锌矿冶区水稻土氟污染状况及污染源分析精选.pdf

Advances in Environmental Protection 环境保护前沿, 2015, 5, 15-21 Published Online April 2015 in Hans. /journal/aep /10.12677/aep.2015.52003 Fluorine Pollution and Pollution Sources of the Paddy Soils in a Lead-Zinc Mining Area Hui Wu, Chuan Wu, Xue-e Wu, Ling Huang, Shengguo Xue* School of Metallurgy and Environment, Central South University, Changsha Hunan * Email: sgxue@, sgxue70@ th th st Received: Apr. 4 , 2015; accepted: Apr. 16 , 2015; published: Apr. 21 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract Fluorine pollution of a certain lead-zinc mining area and pollution sources of surrounding farm- lands 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 0.05), and negatively correlated with lead contents. Fluorite mining, mineral mine mining and smelting may be the main sources of fluorine pollution in paddy soils of the investigated area. Soil parent material, pesticides and chemical fer- tilizers could cause fluorine contamination in t