CAJ | 학술논문

用化学和红外光谱等方法研究SQD-85树脂对镱(Ⅲ)的吸附和解吸行为,探讨溶液pH、镱(Ⅲ)初始浓度、温度以及吸附时间对吸附量的影响.结果表明,SQD-85树脂在pH 5.5的HAc-NaAc缓冲体系中对镱(Ⅲ)的吸附效果最佳,测得树脂在308 K时的静态饱和吸附量为347.6 mg/g;等温吸附符合Langmuir模型；吸附动力学符合假二级动力学模型.热力学参数表明,SQD-85树脂吸附镱(Ⅲ)是自发的吸热过程.动态实验结果符合Thomas模型.当用1.0 mol/L HCI作解吸剂时,解吸率可达97.3％.因此,使用SQD-85树脂可以有效地去除和回收水溶液中的镱(Ⅲ).
용화학화홍외광보등방법연구SQD-85수지대의(Ⅲ)적흡부화해흡행위,탐토용액pH、의(Ⅲ)초시농도、온도이급흡부시간대흡부량적영향.결과표명,SQD-85수지재pH 5.5적HAc-NaAc완충체계중대의(Ⅲ)적흡부효과최가,측득수지재308 K시적정태포화흡부량위347.6 mg/g;등온흡부부합Langmuir모형；흡부동역학부합가이급동역학모형.열역학삼수표명,SQD-85수지흡부의(Ⅲ)시자발적흡열과정.동태실험결과부합Thomas모형.당용1.0 mol/L HCI작해흡제시,해흡솔가체97.3％.인차,사용SQD-85수지가이유효지거제화회수수용액중적의(Ⅲ).
Adsorption and desorption behavior of Yb (Ⅲ) by SQD-85 resin was investigated by various chemical methods and IR spectrometry.The adsorption capacity of SQD-85 resin for Yb (III) was studied as a function of solution pH,initial concentration of Yb(Ⅲ),temperature and contact time.The optimal pH for the adsorption was 5.50 in the HAc-NaAc system,and the maximum adsorption capacity was estimated to be 347.6 mg/g at 308 K.The isotherms adsorption data fit well with Langmuir model.The adsorption kinetics data are in agreement with pseudo-second-order model.Thermodynamic parameters indicate that Yb (Ⅲ)adsorption by SQD-85 resin is endothermic and spontaneous in nature.Thomas model is reasonably accurate in predicting experimental column results.The dynamic desorption rate of Yb(Ⅲ) can increase to 97.3％ when the elution agent is 1.0 mol/L HCI.These results suggest that Yb(Ⅲ) in aqueous solution can be removed and recovered by SQD--85 resin efficiently.