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目的 研究外环境氟、砷含量的分布规律 ,为制定科学有效的防治策略提供可靠依据。方法 采集砷中毒病区饮用井水样 ,测定水中的砷含量、氟含量。结果 高砷、高氟现象并存 ,含有不同含量砷的水中水氟含量不同 (F =2 1.83,P <0 .0 1) ,水砷含量有随井深增加而呈增高的趋势 (F =187.5 3,P <0 .0 1) ,水氟含量有随井深增加而呈降低的趋势 (F =2 7.98,P <0 .0 1)。结论 外环境中水砷含量与水氟含量呈负相关关系 ,低氟低砷水源多埋深于 5 0m左右 ;因地制宜地选择安全水源 ,以保证综合的降氟除砷改水工程防治措施的顺利实施。
Objective To study the distribution of fluoride and arsenic in the external environment and provide a reliable basis for the development of a scientific and effective control strategy. Methods A drinking water sample of arsenism poisoning area was collected for the determination of arsenic and fluorine in water. Results The high arsenic and high fluorine coexist, with different contents of arsenic in water, the fluoride content in water is different (F = 2 1.83, P <0.01), and the arsenic content in water shows an increasing trend with increasing depth of well (F = 187.5 3 , P <0.01). The content of fluoride in water decreased with the increase of well depth (F = 2 7.98, P <0.01). Conclusion The arsenic content in water of outer environment is negatively correlated with the content of fluoride in water, and the content of low-fluorine, low-arsenic water is buried at a depth of about 50 m. The safe source of water is chosen according to local conditions so as to ensure the smooth control measures Implementation.