地热水氟的环境污染调查

Survey of the environmental pollution of fluoride in geothermal water

为了解地热水氟对周围环境影响，用同步采样法调查了福州和雄县地热井周围河水、土壤及农作物的氟含量。结果表明，地热水及其利用后的尾水直接排入外环境，使调查点附近的地面水及土壤受到不同程度的氟污染；污染程度不但与离地热井的距离有关，而且因我国南北地方降水量差异而有所不同；调查点的蔬菜及粮食氟含量均高于对照点。

The authors determined the fluoride levels in river water,soil and crops in the geothermal areas of Fuzhou and Xiong county by same-step sampling.The results showed that the high-fluoride geothermal water and the waste water were directly emitted into the ambient environment,which results in the fluoride pollution of the surface water and the soil near the geothermal wells.The degree of fluoride pollution not only depended on the distance from the geothermal well,but also depended on the rainfall difference between South and North China. The fluoride contents of crops in geothermal areas were all higher than those in the correspendent control areas.