核化学与放射化学Issue(6)：484-489,6.DOI:10.7538/hhx.2015.37.06.0484
聚 N-异丙基丙烯酰胺-丙烯酸共聚微凝胶对水溶液中 Ni（Ⅱ）的吸附性能
Adsorption of Ni(Ⅱ)From Aqueous Solution Onto Poly (N-Isopropyl Acrylamid-Co-Acrylic Acid)Copolymer Hydrogel
摘要
Abstract
In this work, the copolymer microgel of N-isopropyl acrylamid-co-acrylic acid (PNIPA-co-AA)were used as a novel adsorbent for removing Ni(Ⅱ)from aqueous solution. The adsorption of Ni(Ⅱ)onto PNIPA-co-AA was studied as a function of contact time,sol-id/liquid ratio,pH value,ionic strength and temperature.The adsorption isotherm of Ni(Ⅱ)adsorption onto copolymer microgels at different temperature were measured.The results show that Ni(Ⅱ)adsorption onto PNIPA-co-AA is strongly depend on solid/liquid ratio,pH value and ionic strength.Kinetic data indicate that the adsorption process achieves equilibrium within 30 min.Thermodynamics data indicate that the adsorption fits the Lang-miur model and its linearized form well and the Ni(Ⅱ)adsorption onto copolymer microgels is a spontaneous and endothermic nature process.The adsorption capacity is not signification reduced after seven times of adsorption-desorption cycles.Ions exchange is the predominant mechanism of Ni(Ⅱ)adsorption onto PNIPA-co-AA.Present study suggests that the copol-ymer microgels maybe a promising candidate for concentration of heavy metal ions and radio-nuclides from industrial wastewater.关键词
N-异丙基丙烯酰胺/丙烯酸/共聚微凝胶/吸附/Ni(Ⅱ)Key words
N-isopropyl acrylamid/acrylic acid/microgel/adsorption/Ni(Ⅱ)分类
资源环境引用本文复制引用
段国建,刘同环,张浩波,漆偲劼..聚 N-异丙基丙烯酰胺-丙烯酸共聚微凝胶对水溶液中 Ni（Ⅱ）的吸附性能[J].核化学与放射化学,2015,(6):484-489,6.基金项目
国家自然科学基金资助项目(21501082) （21501082）
甘肃中医学院2014引进人才科研启动金(2305136002) （2305136002）
兰州大学中央高校基本科研业务费专项资金(lzujbky-2014-171) （lzujbky-2014-171）
