201×7强碱性阴离子交换树脂吸附浓海水中溴的热力学研究  

RESEARCH ON THE THERMODYNAMICS OF BROMINE ADSORPTION ON 201×7 STRONG-BASE ANION-EXCHANGE RESIN

作　　者：张拿慧[1] 裘俊红[1] 

机构地区：[1]浙江工业大学,绿色化学合成技术国家重点实验室培育基地,杭州310032

出　　处：《离子交换与吸附》2011年第1期26-32,共7页Ion Exchange and Adsorption

基　　金：浙江省自然科学基金资助(Y5100247)

摘　　要：研究了201×7强碱性阴离子交换树脂吸附浓海水中溴的热力学行为,测定了不同温度下的吸附等温线,并计算出吸附过程的热力学参数ΔG、ΔH和ΔS。研究表明,该树脂对溴的吸附容量为2.489mg Br2/mL湿树脂,吸附率达到98%;吸附平衡数据符合Langmuir吸附等温方程;ΔG为负值,该吸附过程可自发进行;ΔH>0,且其绝对值小于40kJ/mol,表明该吸附过程吸热且属于物理吸附;ΔS>0,该吸附过程属于熵增过程。The thermodynamic behavior of bromine adsorption from concentrated seawater with 201×7 strong-base anion-exchange resin was researched.The adsorption isotherm data were measured at various temperatures and the thermodynamic property changes were calculated.The results indicated that the adsorptive capacity of bromine was 2.489mg Br2/mL wet resin,and the experimental data were well fitted by Langmuir equation.The enthalpy change ΔH of the bromine adsorption process was positive,which indicated the process was endothermic.The adsorption process was spontaneous for Gibbs free energy change ΔG0.The entropy change ΔS0,indicated that the adsorption was an entropic increasing process.

关 键 词：溴 浓海水 离子交换树脂 吸附 热力学 

分 类 号：TQ028.3[化学工程]