水氟去除技术的进展

PROGRESS IN FLUORINE REMOVAL FROM WATER

本文概述了饮用水及工业废水去除过量氟的技术现状,并着重介绍了新近研制的6210净水剂及铝盐除氟助剂A的降氟效果.投加6210药剂的脱氟产物为,3CaO·Al_2O_3·CaF_2·11～33H_2O,延时安定性良好,不会污染环境.用来处理高氟饮用水时,硫酸盐型水的脱氟效果好于钠型水;用来处理高氟废水时,通过控制投药量,可一次简便地达到F^-<10mg/L.采用铝盐处理含F^-4～11mg/L的饮用水及含F^-17～66mg/L的废水,前者伴加助剂A 0.05～0.10mg/L,后者为0.1～0.40mg/L.

This paper overviews the present status of technique for fluorine removal from drinking and waste water. Emphasis is focused on the results of fluorine removal using recently developed water-purifying agent 6210 and auxiliary A. Fluorine removal with agent 6210 leads to precipitation of 3CaO·Al_2O_3· CaF_2·11～33 H_2O, which has good stability and does not pollute the environment. When used in high-fluorine drinking water, the performance of fluorine removal from sulphate type water is superior to sodium-salt type water. As for high-fluorine waste water, it is easy to reduce the content of F^- below 10 mg/L by means of controlling agent dosage. The fluorine contents of 4～11 mg/L in drinking water and 17～66 mg/L in waste water can be achieved by treatment using aluminum-salt, adding auxiliary A 0.05～0.10 mg/L and 0.10～0.40 mg/L respectively.