腐殖酸—柱撑膨润土的制备及其对铀VI的吸附性能-南华大学学报.PDFVIP

第27卷第3期 南华大学学报(自然科学版) Vol郾27 No郾3 2013年9月 Journal of University of South China(Science and Technology) Sep郾2013 文章编号:1673-0062(2013)03-0020-05 腐殖酸—柱撑膨润土的制备及其对铀(VI)的吸附性能 1 1 2 夏良树 ,周鹏飞 ,蒋海燕 (1.南华大学 核科学技术学院,湖南 衡阳421001;2.南华大学 城市建设学院,湖南 衡阳421001) 摘摇 要:采用腐殖酸(HA)修饰铝—柱撑膨润土(Al鄄PILC),制备得到腐殖酸—柱撑膨 润土(HA鄄Al鄄PILC),用于去除含铀废水中的铀.通过静态吸附实验考察了投加量、pH 值,接触时间、U(VI)初始浓度对吸附的影响,同时进行了吸附解吸实验.试验结果表 明,HA修饰后的Al鄄PILC对U(VI)的去除能力有了一定程度的提高;HA鄄Al鄄PILC对 U(VI)有很好的去除效果,150 min 左右吸附达到平衡,最佳投加量为1.0 g/ L,最佳 pH值在6左右;HA鄄Al鄄PILC能重复使用. 关键词:柱撑膨润土;腐殖酸;U(VI);吸附;解吸 中图分类号:X703郾5摇 摇 摇 文献标识码:B Studying on Preparation of Humic Acid鄄immobilized Aluminum鄄pillared Clay and its Adsorption Performance to U(VI) 1 1 2 XIA Liang鄄shu ,ZHOU Peng鄄fei ,JANG Hai鄄yan (1.School of Nuclear Science and Technology,University of South China,Hengyang,Hunan421001,China; 2.School of Urban Construction,University of South China,Hengyang,Hunan421001,China) Abstract:Humic acid鄄immobilized aluminum鄄pillared clay(HA鄄Al鄄PILC) was prepared with Humic acid and immobilized aluminum鄄pillared clay(Al鄄PILC). HA鄄Al鄄PILC was used astheadsorbenttoremovetheU(VI)fromcontained鄄uraniumwastewater.Toinvesti鄄 gate the effects of experimental parameters on adsorption behavior,a batch of experiments were performedbychangingadsorbentdose,solutionpH,initialU(VI)ionsconcentration, contact time.The results indicated that the amount of adsorbed uranium is greater for HA鄄 Al鄄PILC,when compared to Al鄄PILC;adsorption equilibrium tends to be achieved in 150 min;dosage of 1.0 g/ L;pH=6.The adsorbent was suita