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Adsorption behaviors of ammonium nitrogen by an amphoteric hydrogel

文献类型： 外文期刊

作者： Wei, Jia 1 ; Liu, Xuan 2 ; Xu, Shimei 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Commod Storage & Proc, Urumqi 830091, Xinjiang, Peoples R China

2.Xinjiang Univ, Coll Chem & Chem Engn, Minist Educ Xinjiang Uygur Autonomous Reg, Key Lab Oil & Gas Fine Chem, Urumqi 830046, Xinjiang, Peoples R China

关键词： Adsorption;Hydrogel;Ammonium nitrogen;Amphoteric;Starch;Removal

期刊名称：DESALINATION AND WATER TREATMENT （ 影响因子：1.254； 五年影响因子：1.553 ）

ISSN： 1944-3994

年卷期： 2016 年 57 卷 13 期

页码：

收录情况： SCI

摘要： An amphoteric hydrogel was prepared by cross-linking graft copolymerization of dimethyl-diallylammonium chloride and acrylic acid onto soluble starch. The adsorption behaviors of ammonium nitrogen (NH4+-N) by the amphoteric hydrogel were discussed in this study. The effects of various experimental parameters on NH4+-N removal, including pH, the dose of absorbent, the temperature, the adsorption time, and the initial concentration of NH4+-N, were investigated. The result indicated that the amphoteric hydrogel showed a fast adsorption rate and high adsorption capacity for NH4+-N in a pH range from 4 to 8. The adsorption process was exothermic according to the value of thermodynamic parameters. The adsorption process fits the pseudo-second-order kinetic model best. To this hydrogel, it was seen that the Freundlich adsorption isotherm model fits the adsorption data better. The adsorption capacity could reach to 33.98 mg/g. The hydrogel showed the potential use for removal of NH4+-N in water treatment and fishing industry.

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