载银沸石吸附去除水中溴离子的特性研究  

Adsorption Properties of Bromide from Aqueous Solutions Using Silver-loaded Zeolite

作　　者：朱云华[1] 丁磊[2] 钟梅英[2] 杜宾[1] 

机构地区：[1]安徽工业大学能源与环境学院,马鞍山243002 [2]安徽工业大学建筑工程学院,马鞍山243002

出　　处：《硅酸盐通报》2015年第7期1857-1863,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助(51308001);国家级大学生创新创业训练计划项目(201210360075)

摘　　要：将天然沸石依次使用1 mol/LNa Cl溶液、1 mol/LHCl溶液、0.2 mol/LAg NO3溶液改性并于马弗炉中450℃焙烧2 h制得载银沸石吸附剂。采用静态吸附方法,探讨了溴离子浓度、吸附时间、吸附剂用量、溶液p H值等因素对溴离子去除效果的影响。载银沸石投加量为0.9 g/L,溶液p H值为7,吸附时间为90 min时,溴离子去除效果达97%以上。拟二级动力学模型可以很好地描述载银沸石对溴离子的吸附动力学过程,其吸附平衡规律符合Langmuir等温线模型。The natural zeolite is modified in turn by using 1 mol / L Na Cl solution,1 mol / L HCl solution,and 0. 2 mol / L Ag NO3 solution. And then it is calcined in a muffle furnace at 450 ℃ temperature for 2hours in order to get the adsorbent of silver-loaded zeolite. The adsorption characteristics of bromide onto silver-loaded zeolite are studied by static adsorption experiment. Some factors such as initial bromide concentration,contact time,adsorbent dosage,and p H of solution,have significant effect on bromide removal. The results show that the removal rate of bromide can reach more than 90% while adsorbent dosage is 0. 9 g / L,the p H of solution is 7 and the adsorption time is 90 min. The adsorption kinetics process can be well described by the pseudo second-order model. And the adsorption equilibrium agrees with the Langmuir isotherm model.

关 键 词：载银沸石 溴离子 吸附 

分 类 号：TU528[建筑科学—建筑技术科学]