某钠基膨润土对水中铊的吸附及解吸试验  

Adsorption and Desorption Test of Sodium Bentonite on Thallium in Water

作　　者：蒙雪忍 谭雅蕾 MENG Xueren;TAN Yalei(Liuzhou Huaxi Design&Research Institute of Non-ferrous Metals Co.,Ltd.;National Engineering Laboratory for Efficient Utilization of Indium and Tin Resource)

机构地区：[1]柳州华锡有色设计研究院有限责任公司 [2]铟锡资源高效利用国家工程实验室

出　　处：《现代矿业》2023年第8期194-198,共5页Modern Mining

摘　　要：为了解钠基膨润土对水中铊的吸附及解吸规律,对经过钠化改性的膨润土进行了水中Tl^(+)吸附、解吸、再生膨润土再吸附试验。结果表明,经钠化改性的膨润土对水中Tl^(+)的吸附能力明显增强,温度、pH值、Tl^(+)溶液初始浓度、离子强度和固液比是影响其吸附性能的主要因素;吸附平衡后的膨润土可在酸性溶液及盐溶液中进行解吸,提高温度及采用超声波有助于提高解吸率,解吸率最高可达95%左右,解吸再生后的膨润土对Tl^(+)溶液仍有较好的吸附性能。In order to understand the adsorption and desorption rule of thallium in water by sodium bentonite,the experiments of Tl^(+)adsorption,desorption and readsorption of regenerated bentonite in water were carried out on sodium-modified bentonite.The results showed that the adsorption capacity of sodium-modified bentonite for Tl^(+)in water was significantly enhanced.Temperature,pH value,initial concentration of Tl^(+)solution,ionic strength and solid-liquid ratio were the main factors affecting the adsorption perfor-mance.The bentonite after adsorption equilibrium could be desorbed in acidic solution and salt solution.The desorption rate could be improved by increasing the temperature and using ultrasonic wave,and the maximum desorption rate could reach about 95%.The desorption regenerated bentonite still had a good adsorption performance for Tl^(+)solution.

关 键 词：钠基膨润土 Tl^(+)溶液 吸附 解吸 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]