魔芋葡甘聚糖基膜材料去除Cr3+污染特性与机理

doi:10.3969/j.issn.0438-1157.2014.08.046

化工学报 ›› 2014, Vol. 65 ›› Issue (8): 3184-3192.DOI: 10.3969/j.issn.0438-1157.2014.08.046

魔芋葡甘聚糖基膜材料去除Cr³⁺污染特性与机理

陈帅^1,2, 林晓艳^1,2, 罗学刚²

1 西南科技大学材料科学与工程学院, 四川绵阳 621010;
2 生物质材料教育部工程研究中心, 四川绵阳 621010

收稿日期:2013-11-12 修回日期:2014-01-11 出版日期:2014-08-05 发布日期:2014-08-05
通讯作者: 林晓艳
基金资助:
研究生创新基金项目（13ycjj13）。

Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film

CHEN Shuai^1,2, LIN Xiaoyan^1,2, LUO Xuegang²

1 School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;
2 Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, Sichuan, China

Received:2013-11-12 Revised:2014-01-11 Online:2014-08-05 Published:2014-08-05
Supported by:
supported by the Graduate Innovation Fund(13ycjj13).

摘要/Abstract

摘要： 以魔芋葡甘聚糖（KGM）和乙酸酐为原料，合成了魔芋葡甘聚糖醋酸酯（KGM-Acetate）溶胶，辅以助剂制备一种新型去污剂，涂布于被Cr³⁺污染的镀漆钢板表面，成膜去污后，去污膜实现自脱落。综合考察了KGM-Acetate合成条件对Cr³⁺去污率、KGM-Acetate溶胶浓度和成膜温度对成膜时间以及不同配方助剂的添加对去污膜的剥离强度的影响，并运用FTIR、EDX及XPS等分析手段对去污机理进行了分析。结果表明：当反应温度为60℃，反应时间为150 min，催化剂浓硫酸的用量为3 ml，酯化剂醋酸酐为40 ml（KGM为5 g）时合成的KGM-Acetate溶胶成膜剂对Cr³⁺去污率最高，达到99.2%。KGM-Acetate对Cr³⁺的去除可能主要是KGM-Acetate与Cr³⁺配位作用和物理吸附作用的结果。当KGM-Acetate溶胶浓度为4.7%、成膜温度为40℃时成膜时间最短为87 min；助剂配方为柠檬酸：十二烷基苯磺酸钠（SDBS）：乙二胺四乙酸钠（EDTA）：水为4：6：1：89时去污膜剥离强度最小，实现自脱落。

关键词: 魔芋葡甘聚糖, 酯化, 膜, Cr³⁺污染, 吸附（作用）, 自脱落膜

Abstract: A new pollutant remover was prepared using Konjac glucomannan (KGM)-Acetate sol that was synthesized from KGM, acetic anhydride and auxiliary additives, and coated on the surface of lacquered metal polluted by Cr³⁺. The additives can make decontamination film fall automatically off after decontaminating. The influence of the synthesis conditions on rate of Cr³⁺ pollutant removal, that of KGM-Acetate sol concentration and film-forming temperature on film-forming time as well as that of various auxiliary additives on filmtearing strength were studied. FTIR, EDX and XPS were used to analyze the mechanism of Cr³⁺ pollutant removal. It is found that the time of film formation is the shortest 87 min at temperature 40℃ and pollutant removal concentration 4.7%. The experiment results show that at the condition of KGM 5 g, acetic anhydride 40 ml, reaction temperature 60℃and time 150 min, and volume of additive (sulfuric acid) 3 ml, the film-forming agent obtained KGM-Acetate sol has the maximum decontamination rate 99.2%. The removal of Cr³⁺ pollutant is likely to be attributed mainly by complexation interaction between Cr³⁺ and carbonyl oxygen in KGM-Acetate as well as physical adsorption. The tearing strength is the least for formulation of additive promoters citric acid 4 g:EDTA 6 g:sodium dodecylbenzenesulfonate 1 g:distilled water 89 g.

Key words: KGM, esterification, membranes, Cr³⁺ pollutant, adsorption, automatically shedding film

中图分类号:

TQ929⁺.2

陈帅, 林晓艳, 罗学刚. 魔芋葡甘聚糖基膜材料去除Cr³⁺污染特性与机理[J]. 化工学报, 2014, 65(8): 3184-3192.

CHEN Shuai, LIN Xiaoyan, LUO Xuegang. Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film[J]. CIESC Journal, 2014, 65(8): 3184-3192.

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魔芋葡甘聚糖基膜材料去除Cr³⁺污染特性与机理

Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film

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