多孔PVA基吸附剂对亚甲基蓝吸附再生特性研究  

Study on adsorption and regeneration characteristics of methylene blue by porous PVA-based adsorbent

作　　者：魏宇希 王宁[1] 刘永红[1] WEI Yuxi;WANG Ning;LIU Yonghong(School of Environmental and Chemical Engineering,Xi’an Polytechnic University, Xi’an 710048, China)

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《西安工程大学学报》2022年第3期93-99,共7页Journal of Xi’an Polytechnic University

基　　金：国家自然科学基金青年科学基金项目(22008188);西安工程大学(柯桥)研究生创新学院产学研协同创新项目(19KQZD06);陕西省重点研发项目(2018ZDXM-SF-023)。

摘　　要：针对多孔聚苯胺(PANI)吸附剂流失及回收再生困难等问题,采用原位化学氧化聚合法制备PANI/聚乙烯醇(PVA)复合材料并对其进行表征,分析不同条件下PANI/PVA复合材料对亚甲基蓝(MB)的吸附性能、吸附机理及可再生性。结果表明:PANI/PVA复合材料吸附MB的最佳有效投加量为1.19 g/L,在pH=9~13时,吸附去除率在80%以上,且吸附平衡时间仅需60 min;PANI/PVA复合材料吸附MB过程符合准二级动力学模型和Langmuir等温线模型,表明该吸附过程为单层化学吸附,拟合的最大有效吸附量为352.2 mg/g;经过5次再生循环后PANI/PVA复合材料吸附性能良好。In view of the problems of PANI adsorbent loss and difficulty in recycling,polyaniline(PANI)/polyvinyl alcohol(PVA)composites prepared by in-situ chemical oxidation polymerization and its morphology and structure were characterized.The adsorption properties and adsorption mechanisms of PANI/PVA composites on methylene blue(MB)under different conditions and the regenerative properties of the adsorbent were analyzed.The results showed that:the optimum effective dosage of PANI/PVA composites to adsorb MB was 1.19 g/L,and the adsorption removal rate was above 80%at pH=9~13,and the adsorption equilibrium time was only 60 minutes.The adsorption process of MB by PANI/PVA composites conformed to the pseudo-second-order model and Langmuir isotherm model,which indicated that the adsorption process was single-layer chemical adsorption,and the maximum effective adsorption of fitting is 352.2 mg/g;PANI/PVA composites still have good adsorption properties after 5 cycles of regeneration experiments.

关 键 词：聚苯胺 聚乙烯醇 复合吸附剂 亚甲基蓝 循环再生 

分 类 号：TS190.3[轻工技术与工程—纺织化学与染整工程] X703[轻工技术与工程—纺织科学与工程]