高分子空心微球的合成及其对废水镉微污染物的吸附性能  

Formation of polymer with hollow microspheres and its adsorption efficiency of cadmium micropollutants

作　　者：余荣台 徐德涛 马湘 谢志鹏[2] 汪长安[2] YU Rongtai;XU Detao;MA Xiang;XIE Zhipeng;WANG Chang'an(School of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,China;School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403 [2]清华大学材料学院,北京100084

出　　处：《环境工程学报》2020年第1期9-15,共7页Chinese Journal of Environmental Engineering

基　　金：江西省教育厅项目(GJJ170775);景德镇市科技局项目(2017GYZD016-015)

摘　　要：为考察高分子纳米微球对微污染物镉的吸附性能,以高分子空心微球为吸附剂,以废水镉微污染物为吸附对象,探讨高分子空心微球的重金属吸附性能,重点考察水热时间和水热温度对高分子微球表面基团的影响。结果表明:水热温度升高,高分子微球出现粘连;当水热温度为180℃,水热时间为4 h时,镉微污染物去除率最佳。强酸性条件有利于高分子微球吸附镉微污染物,当pH<4时,镉微污染物去除率超过95%;而中碱性条件的去除率不超过70%。高分子空心微球镉离子吸附过程不属于放热过程,最大吸附量超过75 mg·g^-1。经盐酸再生利用时,高分子空心微球的镉吸附率没有出现下降,超过95%以上。高分子微球对微污染物镉具有良好的吸附性能。The adsorption efficiency of Cd^2+ by polymer were investigated.Compared to traditional carbon nanospheres,polymer with hollow microspheres were used as adsorbent to adsorb cadmium micropollutants in this study,the adsorption efficiency of cadmium micropollutants by the hollow microspheres were investigated.The effect of hydrothermal temperature and holding time on surface groups of the polymer were studied.The results showed that the groups on the surface of the polymer were affected by hydrothermal temperature and holding time,the particles would be stick together with higher hydrothermal temperature.The removal rate of cadmium micropollutants was at the best at 180℃ for 4 h.When pH was below 4,the removal rate of cadmium micropollutants was above 95%,it showed that it benefit to adsorption cadmium micropollutants at acid condition.When pH was above 7,the removal rate was below 70%.The maximal adsorption capacity of the hollow microspheres polymer was above 75 mg·g^-1,and it was not exothermic process during adsorption.The recycling efficiency of the polymer was above 95% by the recovery technique of hydrochloric acid.The Cd2+ions can be well adsorbed by the polymer.

关 键 词：空心高分子微球 微污染物 吸附 

分 类 号：X703[环境科学与工程—环境工程]