Adsorption behaviors of ammonium nitrogen by an amphoteric hydrogel
文献类型: 外文期刊
第一作者: Wei, Jia
作者: Wei, Jia;Xu, Shimei;Liu, Xuan;Xu, Shimei
作者机构:
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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