大孔季铵化聚(4-乙烯基吡啶)在碱性介质中的硫化物吸附

M. Chanda , G.L. Rempel
{"title":"大孔季铵化聚(4-乙烯基吡啶)在碱性介质中的硫化物吸附","authors":"M. Chanda ,&nbsp;G.L. Rempel","doi":"10.1016/0923-1137(94)00085-J","DOIUrl":null,"url":null,"abstract":"<div><p>A newly available, macroporous anion-exchange resin Reillex™ HPQ, which has about 70% of the pyridine rings quaternized by the addition of methyl groups, has been used in the chloride form for the sorption of sulfide from alkaline aqueous medium. Comparative data on sulfide sorption capacity and kinetics in alkaline media are presented for this new resin and a common anion exchange resin Dowex-1-X8, both used in chloride form. The sulfide sorption capacities of HPQ(Cl<sup>−1</sup>) and Dowex-1(Cl<sup>−1</sup>), activated by treatment with mixed NaCl/HCl solution, are found to be 4.8 and 2.5 mmol S/g (dry), respectively, compared to the respective total exchange capacities of 4.6 and 5.6 mEq/g (dry), indicating that sulfide is predominantly sorbed as univalent HS<sup>−</sup> on HPQ(Cl<sup>−</sup>) and as bivalent S<sup>2−</sup> on Dowex-1(Cl<sup>−</sup>) this is attributed to the occurrence of nearly 30% of the pyridine sites in HPQ(Cl<sup>−</sup>) in protonated form, contributing to lower pH inside the resin phase as compared to external medium. The chloride/sulfide exchange kinetics, in conditions of particle diffusion control and infinite solution volume, are predicted with good approximation by the Nernst-Planck model. Both the chloride and sulfide counterions taking part in the exchange process diffuse very slowly in the resin, the diffusion coefficients being in the order of 10<sup>−10</sup> cm<sup>2</sup>/s, though chloride ions have relatively higher diffusivity than the sulfide ions.</p></div>","PeriodicalId":20864,"journal":{"name":"Reactive Polymers","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1995-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0923-1137(94)00085-J","citationCount":"12","resultStr":"{\"title\":\"Sorption of sulfide on a macroporous, quaternized poly(4-vinyl pyridine) in alkaline medium\",\"authors\":\"M. Chanda ,&nbsp;G.L. Rempel\",\"doi\":\"10.1016/0923-1137(94)00085-J\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A newly available, macroporous anion-exchange resin Reillex™ HPQ, which has about 70% of the pyridine rings quaternized by the addition of methyl groups, has been used in the chloride form for the sorption of sulfide from alkaline aqueous medium. Comparative data on sulfide sorption capacity and kinetics in alkaline media are presented for this new resin and a common anion exchange resin Dowex-1-X8, both used in chloride form. The sulfide sorption capacities of HPQ(Cl<sup>−1</sup>) and Dowex-1(Cl<sup>−1</sup>), activated by treatment with mixed NaCl/HCl solution, are found to be 4.8 and 2.5 mmol S/g (dry), respectively, compared to the respective total exchange capacities of 4.6 and 5.6 mEq/g (dry), indicating that sulfide is predominantly sorbed as univalent HS<sup>−</sup> on HPQ(Cl<sup>−</sup>) and as bivalent S<sup>2−</sup> on Dowex-1(Cl<sup>−</sup>) this is attributed to the occurrence of nearly 30% of the pyridine sites in HPQ(Cl<sup>−</sup>) in protonated form, contributing to lower pH inside the resin phase as compared to external medium. The chloride/sulfide exchange kinetics, in conditions of particle diffusion control and infinite solution volume, are predicted with good approximation by the Nernst-Planck model. Both the chloride and sulfide counterions taking part in the exchange process diffuse very slowly in the resin, the diffusion coefficients being in the order of 10<sup>−10</sup> cm<sup>2</sup>/s, though chloride ions have relatively higher diffusivity than the sulfide ions.</p></div>\",\"PeriodicalId\":20864,\"journal\":{\"name\":\"Reactive Polymers\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1995-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0923-1137(94)00085-J\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Reactive Polymers\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/092311379400085J\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Reactive Polymers","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/092311379400085J","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 12

摘要

一种新开发的大孔阴离子交换树脂Reillex™HPQ,其约70%的吡啶环通过添加甲基而季铵化,已被用于以氯化物形式从碱性水介质中吸附硫化物。本文还比较了该树脂和常用的阴离子交换树脂Dowex-1-X8在碱性介质中的硫化物吸附性能和动力学。经NaCl/HCl混合溶液活化后,HPQ(Cl−1)和Dowex-1(Cl−1)的硫化物吸附容量分别为4.8和2.5 mmol S/g(干),而总交换容量分别为4.6和5.6 mEq/g(干),表明硫化物主要以一价HS -吸附在HPQ(Cl−)上,以二价S2 -吸附在Dowex-1(Cl−)上,这是由于HPQ(Cl−)中近30%的吡啶位点以质子化形式存在。与外部介质相比,树脂相内部的pH值较低。在粒子扩散控制和无限溶液体积条件下,用能思-普朗克模型对氯硫交换动力学进行了较好的近似预测。参与交换过程的氯离子和硫离子在树脂中的扩散都非常缓慢,扩散系数在10−10 cm2/s量级,但氯离子的扩散系数相对高于硫离子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sorption of sulfide on a macroporous, quaternized poly(4-vinyl pyridine) in alkaline medium

A newly available, macroporous anion-exchange resin Reillex™ HPQ, which has about 70% of the pyridine rings quaternized by the addition of methyl groups, has been used in the chloride form for the sorption of sulfide from alkaline aqueous medium. Comparative data on sulfide sorption capacity and kinetics in alkaline media are presented for this new resin and a common anion exchange resin Dowex-1-X8, both used in chloride form. The sulfide sorption capacities of HPQ(Cl−1) and Dowex-1(Cl−1), activated by treatment with mixed NaCl/HCl solution, are found to be 4.8 and 2.5 mmol S/g (dry), respectively, compared to the respective total exchange capacities of 4.6 and 5.6 mEq/g (dry), indicating that sulfide is predominantly sorbed as univalent HS on HPQ(Cl) and as bivalent S2− on Dowex-1(Cl) this is attributed to the occurrence of nearly 30% of the pyridine sites in HPQ(Cl) in protonated form, contributing to lower pH inside the resin phase as compared to external medium. The chloride/sulfide exchange kinetics, in conditions of particle diffusion control and infinite solution volume, are predicted with good approximation by the Nernst-Planck model. Both the chloride and sulfide counterions taking part in the exchange process diffuse very slowly in the resin, the diffusion coefficients being in the order of 10−10 cm2/s, though chloride ions have relatively higher diffusivity than the sulfide ions.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信