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首页> 外文期刊>Journal of Applied Polymer Science >Retention of gallium ions from acidic solutions by pyridine strong-base anion exchangers
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Retention of gallium ions from acidic solutions by pyridine strong-base anion exchangers

机译：吡啶强碱阴离子交换剂保留酸性溶液中的镓离子

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摘要

Using the batch method, the retention of Ga(III) from HCl solutions by two gel-type pyridine strong-base anion exchangers containing 1-methyl- or 1-butyl-4-vinylpyridinium chloride structural units, called S-1 and S-2 resins, respectively, was studied. The influence of the HCl and Ga(III) concentrations as well as of the contact time between the resin and the liquid phase was investigated. The parameters, which characterize the retention process, were estimated using Langmuir and Freundlich isotherms. Both resins exhibited a higher affinity for gallium ions from a 6M HCl solution. According to Langmuir isotherms, maximum retention capacities of 44.44 and 60 mg Ga(III)/g dry resin for the S-1 and S-2 resins, respectively, were obtained. Freundlich isotherms provide additional proof for a higher affinity of the S-2 resin for Ga(III) from HCl solutions. It is clear that the substituent length increase on N+ atoms led to an increasing affinity of the pyridine strong base anion exchangers toward Ga(III). (C) 2002 Wiley Periodicals, Inc. [References: 12]
机译：使用批处理方法，通过两个包含1-甲基或1-丁基-4-乙烯基吡啶鎓氯化物结构单元（称为S-1和S-）的凝胶型吡啶强碱阴离子交换剂，从HCl溶液中保留Ga（III）。分别研究了2种树脂。研究了HCl和Ga（III）浓度以及树脂与液相之间接触时间的影响。使用Langmuir和Freundlich等温线估算了表征保留过程的参数。两种树脂都对6M HCl溶液中的镓离子表现出更高的亲和力。根据Langmuir等温线，对于S-1和S-2树脂，最大保留容量分别为44.44和60 mg Ga（III）/ g干树脂。 Freundlich等温线为S-2树脂对HCl溶液中的Ga（III）具有更高的亲和力提供了额外的证据。显然，取代基长度在N +原子上的增加导致吡啶强碱阴离子交换剂对Ga（III）的亲和力增加。 （C）2002 Wiley Periodicals，Inc. [参考：12]

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