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首页> 外文期刊>Journal of Applied Polymer Science >Adsorption of Ni2+ from aqueous solutions by novel polyethyleneimine-attached poly(p-chloromethylstyrene) beads
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Adsorption of Ni2+ from aqueous solutions by novel polyethyleneimine-attached poly(p-chloromethylstyrene) beads

机译：新型聚乙烯亚胺连接的聚（对氯甲基苯乙烯）珠粒从水溶液中吸附Ni2 +

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摘要

In this study Ni2+ adsorption properties of polyethyleneimine (PEI)-attached poly(p-chloromethylstyrene) (PCMS) beads were investigated. Spherical beads with an average size of 186 gm were obtained by the suspension polymerization of p-chloromethylstyrene conducted in an aqueous dispersion medium. Owing to the reasonably rough character of the bead surface, PCMS beads had a specific surface area of 14.1 m(2)/g. PEI chains could be covalently attached onto the PCMS beads with equilibrium binding capacities up to 208 mg PEI/g beads, via a direct chemical reaction between the amine and chloro-methyl groups. After PEI adsorption with 10% (w/w) initial PEI concentration, free amino content of PEI-attached PCMS beads was determined as 0.91 mEq/g. PEI-attached PCMS beads were utilized as adsorbents in the adsorption/desorption of Ni2+ ions from synthetic solutions. The adsorption process was fast; 90% of adsorption occurred within 90 min, and equilibrium was reached at around 2 h. Adsorption capacity was obtained to be 78.2 mg/g at a pH of about 6.0. The chelating beads can be easily regenerated by 0.1 M HNO3, with higher effectiveness. (C) 2002 John Wiley Sons, Inc. [References: 36]
机译：在这项研究中，研究了聚乙烯亚胺（PEI）连接的聚（对氯甲基苯乙烯）（PCMS）珠的Ni2 +吸附性能。通过在水分散介质中进行对氯甲基苯乙烯的悬浮聚合，获得平均粒径为186gm的球形珠。由于珠子表面相当粗糙，PCMS珠子的比表面积为14.1 m（2）/ g。通过胺和氯甲基之间的直接化学反应，PEI链可以以高达208 mg PEI / g珠的平衡结合能力共价连接到PCMS珠上。用10％（w / w）的初始PEI浓度吸附PEI后，PEI连接的PCMS珠的游离氨基含量确定为0.91 mEq / g。附有PEI的PCMS磁珠被用作吸附剂，用于从合成溶液中吸附/解吸Ni2 +离子。吸附过程很快; 90分钟内发生90％的吸附，并在2小时左右达到平衡。在约6.0的pH下获得的吸附容量为78.2mg / g。螯合珠可用0.1 M HNO3轻松再生，效率更高。 （C）2002 John Wiley Sons，Inc. [参考：36]

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