Chemical modification,characteristics of PVC resin and its adsorption properties for Cr(Ⅵ)

doi:10.16085/j.issn.1000-6613.2017-0077

Abstract

Abstract: A new kind adsorptive material of high exchange capacity (10.52mmol/g) had been synthesized via the graft reaction of PVC resin with triethylene tetramine (TETA),and its structure and synthesis mechanism were investigated by the means of FTIR,EA,TG and chemical method. The results showed that TETA group had been introduced into PVC chain successfully along with the elimination of HCl. Moreover,the maximum adsorption capacity of the novel adsorptive resin was about 563mg/g for Cr(Ⅵ),and the adsorptive behavior was preferably described by the Langmuir isotherm model. After five times cycles of adsorption-desorption,the resin still kept excellent adsorption performance. The prepred PVC-TETA resin is expected to have a promising prospect in the treatment of chromium-containing wastewater.

Key words: ion exchange, waste water, adsorption, separation

摘要： 通过聚氯乙烯（PVC）树脂与三乙烯四胺（TETA）的交联接枝反应制得一种高交换容量（10.52mmol/g）吸附树脂新材料，并通过红外分析（FTIR）、元素分析（EA）、热重分析（TG）等仪器对产物结构与反应机理进行了分析与表征。此外，还初步研究了PVC-TETA树脂对水中六价铬的吸附与再生性能。结果表明：PVC能成功地与TETA 发生反应而制备出PVC-TETA吸附树脂；在改性的过程中，PVC会出现不同程度的消除反应而形成碳碳双键；合成的PVC-TETA吸附树脂对Cr（Ⅵ）吸附容量高达563mg/g，其吸附等温线符合 Langmuir 模型；该树脂经5次吸附再生循环后其吸附容量保持稳定，具有很好的实际应用性能。

关键词: 离子交换, 废水, 吸附, 分离

CLC Number:

TL284

LIU Ao, SHAO Gonglei, ZHANG Zhonglu, HUANG Jiajia, YUAN Siguo. Chemical modification,characteristics of PVC resin and its adsorption properties for Cr(Ⅵ)[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3765-3770.

刘傲, 邵功磊, 张中路, 黄佳佳, 原思国. 聚氯乙烯移动树脂的化学修饰、表征及对Cr（Ⅵ）的高效吸附[J]. 化工进展, 2017, 36(10): 3765-3770.

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