文献类型：期刊文献

中文题名：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

英文题名：Adsorption of Ni(Ⅱ) From Aqueous Solution Onto Poly(N-Isopropyl Acrylamid-Co-Acrylic Acid)Copolymer Hydrogel

作者：段国建[1];刘同环[2];张浩波[1];漆偲劼[2]

第一作者：段国建

机构：[1]甘肃中医药大学,甘肃兰州730000;[2]兰州大学核科学与技术学院放射化学与核环境研究所,甘肃兰州730000

第一机构：甘肃中医药大学

年份：2015

卷号：37

期号：6

起止页码：484

中文期刊名：核化学与放射化学

外文期刊名：Journal of Nuclear and Radiochemistry

收录：Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金资助项目(21501082);甘肃中医学院2014引进人才科研启动金(2305136002);兰州大学中央高校基本科研业务费专项资金(lzujbky-2014-171)

语种：中文

中文关键词：N-异丙基丙烯酰胺;丙烯酸;共聚微凝胶;吸附;Ni(Ⅱ)

外文关键词：N-isopropyl acrylamid; acrylic acid; microgel; adsorption; Ni（ Ⅱ ）

摘要：以聚N-异丙基丙烯酰胺-丙烯酸共聚微凝胶(PNIPA-co-AA)为吸附剂,采用静态批试法研究了Ni(Ⅱ)在共聚微凝胶上的吸附行为。探讨了震荡时间、固液比、pH值、离子强度及温度等因素对吸附结果的影响,测定了共聚微凝胶在不同温度下对Ni(Ⅱ)的吸附等温线。结果表明:固液比、pH值和离子强度均对吸附过程有明显影响;吸附过程在30min内即可达到平衡;Langmiur方程能够很好的拟合吸附等温线。热力学参数(ΔH、ΔS和ΔG)表明,此吸附过程是一个自发、吸热的过程。吸附能力在经过7次的吸附-解吸附过程后没有明显的下降。离子交换是此吸附过程的主要机理。
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-eo-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 rain. 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.