Hydrazine-Functionalized guar-gum material capable of capturing heavy metal ions 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides
年/卷/期
2019 / 223 /
页码
115137-1-115137-7
ISSN号
0144-8617
作者单位
Southwest Petr Univ, Coll Chem & Chem Engn, 8 Xindu Rd, Chengdu 610500, Sichuan, Peoples R China;Southwest Petr Univ, Coll Chem & Chem Engn, 8 Xindu Rd, Chengdu 610500, Sichuan, Peoples R China;Southwest Petr Univ, Coll Chem & Chem Engn, 8 Xindu Rd, Chengdu 610500, Sichuan, Peoples R China;Southwest Petr Univ, Coll Chem & Chem Engn, 8 Xindu Rd, Chengdu 610500, Sichuan, Peoples R China;
作者
Ma, Junchi;Fang, Shenwen;Shi, Peng;Duan, Ming;
摘要
This research demonstrates the capability of guar-gum modified with salicylhydrazine to remove Ni2+, Co2+ and Cr3+ from aqueous solution. Structural characterization showed that aldehydes guar gum was grafted with salicylhydrazine with morphology. The as-prepared nanocomposite had a large surface area and hydrophobicity, which ensured its good sorption ability and convenience of separation. The sorption equilibrium data were well fitted to the Langmuir model, and uniquely high adsorption capacities for nickel, chromium and cobalt, which are 1272.4 mg.g(-1), 748.86 mg.g(-1) and 521.81 mg.g(-1), remarkably, were achieved. The thermodynamic parameters for the sorption were also determined, and Delta G and Delta H values indicate exothermic behavior. Adsorption mechanism of capturing cation with GG-SH has been demonstrated through H-1 NMR titration experiments of model molecular and metal ions. The features make this carbohydrate-based material suitable in water purification and separation treatment.
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关键词/主题词
Guar gum;Hydrazine;Heavy metal ions;Adsorption;
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