农村高氟水处理研究

目的]为处理含氟废水提供方法支持。方法]从天津芦台农村地下水取样,分别用AlCl3改性海泡石和粉煤灰及其混合物处理水样,并在处理前后测定水样的氟离子浓度。结果]改性海泡石的除氟能力随用量的增加而略有增加,随温度的增加而减小,随pH值的增加有明显变化,吸附过程为放热过程,处理时间对其吸附能力的影响不大。改性海泡石的最佳处理时间为20～30 min,在室温下其处理效果最佳,其吸附量在pH值为6时达最大值。改性粉煤灰的除氟能力随用量的增加而略有增加,随处理时间的增加而变化,随温度的增加而减小。改性粉煤灰在室温下对氟离子的去除效果最佳。结论]海泡石和粉煤灰协同处理含氟废水的最佳处理条件是:pH值为6,粉煤灰-海泡石的用量为4 mg/ml,在20℃下处理30 min。

Study on the Processing of Rural Water with High Fluoride Content

Objective] The purpose of the study was to provide methodological support for processing fluorine wastewater.Method] The water samples were collected from the groundwater in the countryside of Lutai in Tianjin.They were processed with sepiolite and fly ash modified with AlCl3 and their mixture resp.and the fluoride concn.of the water samples were determined before and after processing.Result] The fluoride removal capacity of modified sepiolite was increased a little along with the increasing of its dosag...