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Adsorption behavior of uranyl ions onto amino-type adsorbents prepared by radiation-induced graft copolymerization 预览
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作者 迟洪影 刘西艳 +7 位作者 马红娟 杨晓娟 虞鸣 张建勇 王敏 李景烨 Hiroyuki Hoshina Noriaki Seko 《核技术:英文版》 SCIE CAS CSCD 2014年第1期20-26,共7页
Amino-type adsorbents(ATAs) were prepared by radiation-induced graft copolymerization of 4-hydroxybutyl acry late glycidyl ether(HB) onto a polyethylene-coated polypropylene(PE/PP) duplex fiber of a non-woven fa... Amino-type adsorbents(ATAs) were prepared by radiation-induced graft copolymerization of 4-hydroxybutyl acry late glycidyl ether(HB) onto a polyethylene-coated polypropylene(PE/PP) duplex fiber of a non-woven fabric,and modified with different amines of ethylenediamine(EDA),diethylenetriamine(DETA),triethylenetetramine(TETA) and diethylamine(DEA).The adsorption behavior of uranyl ions onto the ATAs was studied in batch experiments.The effects of the contact time,initial concentration of the ions,temperature,and pH value.The salinity were investigated along with the adsorption kinetics and the adsorption isotherms.The kinetic experimental data followed the pseudo second-order kinetic model,and the adsorption isotherms correlated well with the Langmuir model.The ATAs showed good efficiency in adsorbing uranyl ions,with the best saturation adsorption capacity being 64.26 mg g-1 for ATA-DETA within 120 min.The temperature dependence of ATADETA was quite abnormal and the quickest behavior was obtained at 25 ℃.ATAs showed good adsorption capacity over a wide pH range of 4.0-8.5,and HCl could be used in the elution process.Salinity of the solution had great effect on the adsorption capacity,3.5%salinity resulted in a 55%loss of capacity from ATA-DETA.The selectivity of ATA-DETA showed an order of:UO22+≈Fe3+> Zn2+ > VO3- > Co2+ > Ni2+. 展开更多
关键词 吸附行为 铀酰离子 接枝共聚 辐射诱导 吸附剂 基型 LANGMUIR模型 吸附等温线
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