活性氧化铝/硅胶吸附剂对环境水体的脱氟行为研究及应用初探

试制新型活性氧化铝/硅胶脱氟吸附剂,具有除氟选择性高、吸附容量大、适于在中性介质中应用、高温下吸附效果更佳等特点.其脱氟机理系典型的化学吸附作用,在含氟8.0mg/L的地热井井口的柱试验结果表明,当处理指标定为水中含氟1.0和3.0mg/L时,穿透体积V_b分别为2380和4000柱体积.饮用水实地试验结果表明,该吸附剂不仅具有除氟效能,还具有显著的降浊、脱色,脱碱和除铁等作用.

DEFLUORINATION PERFORMANCE OF ACTIVATED ALUMINA/SILICA GEL AND ITS APPLICATION

A new activated adsorbent developed for fluoride removal was investigated. The adsorbent was characterized for its high selectivity for fluoride, great adsorption capacity, applicable in neutral media and much better adsorption effect at high temperature. The mechanism of removing fluoride is a typical chemiad-sorption, differ from that of activated alumina. It was showed from the results of column test at a geothermal well that the breakthrough volume is 2380 and approximately 4000BV at the criteria of 1.0 and 3.0 mgF/L in treated water respectively. The content of fluoride ions in the geothermal water is up to 8.0 mg/L. It was showed from the results of on-the-spot tests for drinking water that the adsorbent not only plays a part of removing fluoride, but also has notable effects of reducing turbidity, decolorizing, dealkalizing and removing iron ions for drinking water.