凹凸棒复合滤料对水中Ni^(2+)的吸附研究

Study on Adsorption of Ni^(2+) from Aqueous Solutions by Attapulgite Composite Filtration Material

通过静态吸附实验,研究了凹凸棒复合滤料对水中Ni2+的吸附性能,探讨了滤料投加量、吸附时间、pH值、反应温度、初始浓度等对Ni2+吸附效果的影响。实验结果表明,凹凸棒复合滤料对水中Ni2+的吸附率随溶液pH值和温度的升高而升高,吸附反应在120 min左右达到平衡,吸附率最高可达99.5%,吸附过程符合Langmuir吸附模型。凹凸棒复合滤料通过再生后可以反复使用。

Adsorption of Ni^2＋ by attapulgite composite filtration material was studied by batch experiments.The effects of filtration material dosage,contact time,pH value,temperature and Ni^2＋ initial concentration were investigated.The results indicated that adsorption rate increased with the increase of pH and temperature.Adsorption got balance at contact time 120 min.The maximum adsorption rate of Ni^2＋ could reach 99.5%.The adsorption process accorded with Langmuir isotherms.Attapulgite composite filtration material has high recycling rate after regeneration.