Characteristic and mechanism of Cr<sup>3+</sup> pollutant removal byKGM-base film

CHEN Shuai; LIN Xiaoyan; LUO Xuegang

doi:10.3969/j.issn.0438-1157.2014.08.046

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

更新时间：2025-12-10

- Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film
- CIESC Journal Issue 8, Pages: 3184-3192(2014)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.08.046
  CLC： Q929+.2
- Online First：05 August 2014，
  
  Published：05 August 2014
- 稿件说明：
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CHEN Shuai, LIN Xiaoyan, LUO Xuegang. Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film[J]. CIESC Journal, 2014, (8): 3184-3192. DOI: 10.3969/j.issn.0438-1157.2014.08.046.
DOI：

CHEN Shuai, LIN Xiaoyan, LUO Xuegang. Characteristic and mechanism of Cr³⁺ pollutant removal byKGM-base film[J]. CIESC Journal, 2014, (8): 3184-3192. DOI: 10.3969/j.issn.0438-1157.2014.08.046. DOI：

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。

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.

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

DOI：10.3969/j.issn.0438-1157.2014.08.046

摘要

Abstract

关键词

Keywords

references

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