小麦淀粉基高吸水树脂的吸盐热力学及动力学
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摘要
测定了高吸水树脂在Na Cl、KCl、Mg Cl2、Ca Cl2溶液中吸液率和吸附盐离子率,研究高吸水树脂对Na Cl、KCl、Mg Cl2、Ca Cl2的吸附热力学和吸附动力学。结果表明,高吸水树脂的吸液率和吸附盐离子率与盐溶液中阳离子的价态有关,对二价阳离子的吸附能力远小于一价阳离子,吸附Na+、K+的平衡常数b和速率常数ks远大于吸附Ca2+、Mg2+平衡常数b和速率常数ks,且温度越高平衡常数b和速率常数ks越大,Na Cl、KCl、Mg Cl2和Ca Cl2的吸附热力学规律符合Langmuir方程,吸附动力学符合准二级动力学方程。
The fluid and salt ions absorption rate of the super absorbent polymer( SAP) was determinated in Na Cl,KCl,Mg Cl2 and Ca Cl2 solution,and the adsorption characteristics of SAP thermodynamics and kinetics of Na Cl and Ca Cl2 were studied. The results shows that the salt ions absorption rate of SAP is related to the cation of the solution,the bivalent cation absorption ability is far less than monovalent cations. The equilibrium constant b and speed constant ksof absorbing Na+and K+are much greater than that of absorbing Mg2 +and Ca2 +,and the higher the temperature the greater the equilibrium constant b and speed constant ks. The adsorption thermodynamics of Na Cl,KCl,Mg Cl2 and Ca Cl2 is complied with the laws of Langmuir equation. The adsorption kinetics result illustrates it fits to the Pseudo-second order equation.
The fluid and salt ions absorption rate of the super absorbent polymer( SAP) was determinated in Na Cl,KCl,Mg Cl2 and Ca Cl2 solution,and the adsorption characteristics of SAP thermodynamics and kinetics of Na Cl and Ca Cl2 were studied. The results shows that the salt ions absorption rate of SAP is related to the cation of the solution,the bivalent cation absorption ability is far less than monovalent cations. The equilibrium constant b and speed constant ksof absorbing Na+and K+are much greater than that of absorbing Mg2 +and Ca2 +,and the higher the temperature the greater the equilibrium constant b and speed constant ks. The adsorption thermodynamics of Na Cl,KCl,Mg Cl2 and Ca Cl2 is complied with the laws of Langmuir equation. The adsorption kinetics result illustrates it fits to the Pseudo-second order equation.
引文
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[2]Cui Yingde,Li Xinming,Yin Guoqiang,et al.Environmental super absorbent polymer[M].Beijing:Chemical Industry Press,2008,16-50
[3]Wu Jiangyu,He Ziying,Li Xiuhui.Preparation and performance of water swellable rubber based on modified superabsorbent resin[J].Journal of Materials Engineering,2014,06.40-43.
[4]Liu Xiaoming,Xu Yanhong,Guo Zhaoqi,et al.Super absorbent conjugated micro porous polymers:a synergistic structural effect on the exceptional uptake of amines[J].Chemical Communications,2013,29,3233-3235.
[5]Li Yanfeng,Li Xianzhen,Zhou Lincheng.Study on the synthesis and application of salt-resisting polymeric hydro gels[J].Polymers for Advanced Technologies,2004,5:34-38.
[6]Mahida V P,Patel M P.Synthesis of new superabsorbent poly nanohydrogel for effective removal of As(V)and Cd(Ⅱ)toxic metal ions[J].Chinese Chemical Letters,2014,25,601-604.
[7]Zhao Yanyan,Jiang Shaotong,Zhou Jianqin.Properties and absorbency mechanism of starch-based Super absorbent polymer[J].Transactions of the Chinese society for Agricultural Machinery,2007,38,65-69.
[8]Liu Zuoxin,Miao Yonggang,Wang Zhenying,et al.Synthesis and characterization of a novel super-absorbent based on chemically modified pulverized wheat straw and acrylic acid[J].Carbohydrates Polymers,2009,77,131-135.
[9]Yao Qingxin,Xie Jianjun,Zeng Nian.et al.Preparation and adsorption property of BLAMA adsorption resin composites[J].Journal of Functional Materials,2014,02,02129-02132.
[10]Lin Xiongcai,Li Yunkai,Xu Tingwu,et al.Water-absorbing characteristic and swelling kinetic of different grain diameter of agricultural super absorbing polymer[J].Polymer Materials Science and Engineering,2008,5,116-120.
[11]Li Xi,He Jizheng,Hughes Jane.Effect of super-absorbent polymers on a soil-wheat system in the field[J].Applied Soil Ecology,2014,73.58-63.
[12]Macfarlane D,Tachikawa N,Forsyth M,et al.Energy application of ionic liquids[J].Energy&Environmental Science,2014,07,232-250.
[13]Ho Y S,Mckay G.Sorption of dye from aqueous solution by peat[J].Chemical Engineering Journal,1998,70:115-124.
[14]Ho Y S,Mckay G.Pseudo-second order model for sorption processes[J].Process Biochemistry,1999,34:451-465.
[15]Saber S,Gazi M.Removal of mercury from aqueous solution using chitosan-graft-polyacrylamide semi-IPN hydro gels[J].Separation Science and Technology,2013,48(09),1382-1390.
[16]Bao Yan,Ma Jianzhong,Li Na.Preparation and properties of super absorbent acrylic resin[J].Journal of Functional Materials,2011,04,693-696.