高含氟矿井水深度除氟技术研究

Research on Deep Fluorine Removal Technologyfor High Fluorine Mineral Well Water

针对高含氟矿井水采用单一除氟方法处理效果不理想的问题,以西部矿区某高含氟矿井水为研究对象,将混凝沉淀实验和吸附实验相结合,开展了混凝-吸附法深度除氟技术研究。结果表明:当混凝剂PAFC的加量为250 mg·L^(-1)、混凝反应时间为8 min时,混凝处理效果最好,此时含氟矿井水的浊度去除率可以达到99.7%,浊度可以降低至4.6NTU左右。当复合吸附剂FXF-1的加量为12 g·L^(-1)、吸附反应温度为35℃、吸附反应时间为80 min时,吸附处理效果最好,此时含氟矿井水的氟离子去除率可以达到97.6%,水中氟离子质量浓度可以降低至0.5 mg·L^(-1)以下,能够满足国家标准GB 3838—2002中Ⅲ类水质标准的要求。混凝-吸附法对目标高含氟矿井水的处理效果较好,在高含氟矿井水的除氟方面具有良好的推广应用前景。

In response to the problem of unsatisfactory treatment effect of a single fluoride removal method for high fluoride mine water,taking mine water with high fluorine content in the western mining area as the research object,the deep fluorine removal technology by coagulation-adsorption method was studied by combining coagulation-precipitation experiment with adsorption experiment.The experimental results showed that when the dosage of coagulant PAFC was250mg·L^(-1) and the coagulation reaction time was8 min,the coagulation treatment effect wasthe best.At this time,the turbidity removal rate of fluorinated mine water reached 99.7%,and the turbidity was reduced to about 4.6NTU.When the dosage of composite adsorbent FXF-1 was12g·L^(-1),the adsorption reaction temperaturewas35℃,and the adsorption reaction time was 80min,the adsorption treatment effect was the best.At this time,the fluoride ion removal rate of fluorinated mine water was 97.6%,and the fluoride ion mass concentrationin the water was reduced to below 0.5mg·L^(-1),which met the requirements of Class III water quality standard in the national standard GB 3838—2002.The coagulation adsorption method has a good treatment effect on the target high fluoride mineral well water,and has good prospects for promotion and application in the removal of fluoride in high fluoride mineral well water.