改性活性氧化铝吸附除氟的连续试验研究

针对不同进水水质、运行条件、设备3个方面,对改性活性氧化铝吸附除氟连续试验进行研究。试验结果表明,进水氟质量浓度、进水pH对吸附柱穿透影响显著,进水氟质量浓度从5mg/L下降到2mg/L时,穿透体积提高1.9倍;进水pH从7.6降低到6.0时,穿透体积提高2.6倍以上,当进水pH在6.0~6.5时,穿透体积达到最大值1388倍体积。穿透体积随进水速率提高而下降,在空速1.3~2.0h^-1时,穿透体积下降较小;当空速大于2.0h^-1时,穿透体积随空速增加而快速下降。吸附柱直径及填充高度对穿透体积无影响。

Column adsorption of fluoride ions by modified activated alumina

Column adsorption of fluoride ions by modified activated alumina has been studied,and the influence of varying the inlet water ingredients,operating conditions,and column dimensions investigated.The results showed that the inlet fluoride concentration and inlet water pH significantly affect adsorption.The breakthrough volume increased 1.9 times when the inlet fluoride concentration decreased from 5mg/L to 2mg/L.The breakthrough volume increased 2.6 times when the inlet water pH decreased from 7.6 to 6.0.When the inlet pH was in the range 6.0-6.5,the breakthrough volume reached a maximum of 1388 times the bed volume.The breakthrough volume decreased with inlet space velocity increasing.When the space velocity was in the range 1.3-2.0h-1,the breakthrough volume decreased slightly,but when the space velocity was greater than 2.0h-1,the breakthrough volume decreased greatly.Tests also showed that the dimensions of the column did not affect the breakthrough volume.