沙棘枝糠粉(SBP)-g-P(AA-co-AM)高吸水树脂的制备及其对亚甲基蓝的吸附性能研究  

Study on preparation of SBP-g-P(AA-co-AM)composite and its adsorption of methylene blue

作　　者：张学文[1] 白波[2] 何云华[1] 丁晨旭[2] 王洪伦[2] 索有瑞[2] 

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]中国科学院西北高原生物研究所,西宁810001

出　　处：《化工新型材料》2016年第2期219-221,225,共4页New Chemical Materials

基　　金：中国博士后特别资助项目(201104615);中央高校基本科研业务费专项资金(2013G2291015)

摘　　要：以废弃沙棘枝为原料,丙烯酸(AA)和丙烯酰胺(AM)为单体合成了一种高吸水树脂—SBP-g-P(AA-coAM),用以除去水体中的亚甲基蓝(MB)。考察了pH、MB初始浓度对吸附性能的影响,并对吸附动力学和热力学进行了研究。结果表明:SBP-g-P(AA-co-AM)对MB有良好的吸附效果,吸附最佳pH值为7;吸附过程符合准二级动力学模型和Langmuir等温吸附方程;吸附反应的ΔG和ΔH值均为负值,说明SBP-g-P(AA-co-AM)吸附MB的过程是自发的放热过程。The sea-buckthorn branch powder was used as the raw material to prepare a superabsorbent--SBP-g-P （AA-co-AM）. The obtained composites were used as adsorbent for the removal of methylene blue dye in aqueous solutions. In the study of the adsorption behavior of methylene blue dye （MB）, variables such as concentration of solution and pH were investigated. And the adsorption kinetics and thermodynamics were studied. The results showed that the superabsorbent had a good adsorption effect on methylene blue,the optimal pH value was about 7. The pseudo-second-order kinetic equation and the Langmuir model was found to be in better correlation with the experimental data. The negative adsorption values AG and AH showed that the adsorption process was spontaneous and exothermic.

关 键 词：沙棘枝糠粉 高吸水性树脂 亚甲基蓝 吸附模型 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]