摘要
亚氨基二乙酸树脂 (D4 0 1)对铕 ( )的吸附在 HAc- Na Ac缓冲溶液 p H=5 .73时最佳 ,2 5℃时静态饱和吸附容量为 182 m g/g;用 2 .0 m ol· L- 1 HCl作解析剂解吸率为 10 0 % ;等温吸附服从 Freundlich经验式 ;表观速率常数 k2 98=2 .5 4× 10 - 5s- 1 ;吸附的热焓为△ H°=76 .6 k J· mol- 1 ;树脂功能基与铕 ( )的摩尔比为 3∶ 1;用化学法和红外光谱等探讨了吸附机理。
Eu(Ⅲ)is optimally adsorbed by iminodiacetic acid resin(D401)in the medium of HAc-NaAc at pH=5.73.The statically saturated adsorption capacity at 25℃ is 182mg/g resin.Eu(Ⅲ)adsorbed on D401 can be eluted with 2.0mol·L -1 HCl and the elution percentage is 100%.The adsorption behavior of D401 for Eu(Ⅲ) obeys the Freundlich isotherm.The apparent adsorption rate constant is k 298 =2.54×10 -5 s -1 .The adsorption enthalpy change of D401 for Eu(Ⅲ)is 76.6kJ·mol -1 .The molar ratio of the functional group of D401 to Eu(Ⅲ)is 3∶1.The adsorption mechanism of D401 for Eu(Ⅲ)has been discussed by using chemical method and IR spectrometry.
出处
《稀土》
EI
CAS
CSCD
北大核心
2002年第5期56-59,共4页
Chinese Rare Earths
基金
浙江省高校中青年学科带头人基金
浙江省自然科学基金资助项目 (2 0 0 0 72 )
浙江省教育厅计划项目 (2 0 0 10 677)
