摘要
研究了用AlCl3包覆后膨润土除氟的性能和适宜条件.结果表明,该膨润土对氟离子有良好的吸附效果,实验条件下吸附率最高可达96.5%,酸性环境有利于吸附过程进行.在25℃,pH为4的条件下,绘制了氟离子初始浓度分别为5,10,20 mg·L-1时平衡浓度降至国家饮用水含氟标准(0.5～1.0 mg·L-1)所需土样用量曲线及吸附等温线,平衡浓度低于1.0 mg·L-1的土样用量分别约为0.096 g·20 mL-1,0.28 g·20 mL-1和0.50 g·20 mL-1,吸附过程可以用Freundlich型吸附等温线进行较好拟合.此膨润土有较好的耐酸性,吸附过程不会导致二次污染,具有较好的实际应用前景.
The function and optimal conditions of defluorination by Al(OH)_3-coated bentonite from aqueous solution were investigated in this paper. The results show that high sorption percentages of fluorion by Al(OH)_3-coated bentonite were found, reaction equilibrium was quickly obtained, and acidity conditions were favourable. Under the conditions which the pH is 4 and the temperature reaches 25 ℃, the mass curves of Al(OH)_3-coated bentonite, that is required when the equilibrium concentrations meted the national...
出处
《有色矿冶》
2005年第4期40-43,共4页
Non-Ferrous Mining and Metallurgy
关键词
氢氧化铝
包覆膨润土
除氟
Al（OH）_3-coated bentonite
defluorination
