Radical-induced crosslinking of poly(vinyl alcohol) from desizing wastewater

被引：0

作者：

Shen C. ^{[1
]}

Wang M. ^{[1
]}

Xu C. ^{[1
]}

Wang H. ^{[2
]}

Li F. ^{[1
]}

机构：

[1] State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai

[2] State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai

来源：

Fangzhi Xuebao/Journal of Textile Research | 2021年 / 42卷 / 11期

关键词：

Desizing wastewater; Persulfate; Poly(vinyl alcohol); Radical-induced crosslinking; Thermal activation;

D O I：

10.13475/j.fzxb.20201204207

中图分类号：

学科分类号：

摘要：

The desizing wastewater of the textile printing and dyeing industry contains a large amount of polyvinyl alcohol (PVA) with high polymerization and strong chemical stability, which is a difficult point in the water pollution treatment. Taking advantage of persulfate's ability to initiate free radical crosslinking and strong oxidation, combined with the characteristics of high temperature discharge of desizing wastewater, a thermally activated persulfate system was used to precipitate PVA from wastewater.The effects of persulfate dosage, reaction time, reaction temperature, and pH value on the removal of PVA were investigated.And electron paramagnetic resonance, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to analyze the cross-linked precipitates.The results show that when the dosage of persulfate was 10 g/L and the wastewater temperature was 70 ℃, PVA could be effectively cross-linked and precipitated after 30 minutes, and the removal rate of chemical oxygen demand (COD) and PVA could reach 95.1% and 95.6%, respectively.The production of sulfate radical and hydroxyl radical in thermally activated persulfate system induced the production of carbon-based radicals, and the carbon-based radicals continued to react together and produced the crosslinking product. © 2021, Periodical Agency of Journal of Textile Research. All right reserved.

引用

页码：117 / 123

页数：6

共 21 条

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