活性氧化铝除氟剂的再生性能研究

Regeneration Performance of Activated Aluminum Oxide as A Fluorine-Removal Agent

对活性氧化铝除氟剂的再生功能进行了吸脱附性能研究.结果显示,A、B两种不同粒径活性氧化铝除氟剂吸附饱和后,经过再生技术处理,可基本恢复原有除氟性能.在除氟剂A样和B样对氟含量为10mg/L的原水处理试验中,当原水流速分别控制在60mL/min和70mL/min及以下时,其终端流出水中的氟含量均小于1mg/L.实验结果还表明,小粒径活性氧化铝除氟剂具有较好的动力学性能,在吸附速率和相对饱和吸附量等方面优于大粒径活性氧化铝除氟剂,但同时,大粒径活性氧化铝除氟剂再生后可快速恢复绝对饱和吸附量.

Two types of activated aluminum oxide A and B as fluorine-removal agents for the treatment drinking water were studied in the performance of their regeneration process. The results were shown at the regeneration techniques were very suitable to restore the fluorine-removal ability for both sample and B. While the flowing rate of water with the concentration of fluorine at 10 mg/L was controlled at 60 mL/min and 70 mL/min for fluorine removal agent A and B processed by regeneration respectively, both fluorine concentrations of the end-flowing water were less than lmg/L. The experiments suggest that aluminum oxide with smaller diameter holds better kinetic properties including adsorption rate and relative saturated adsorptive, which is very helpful to construct the fluorine remover in field application, although the oxide with bigger diameter has better regeneration performance.