商丘师范学院学报
商丘師範學院學報
상구사범학원학보
JOURNAL OF SHANGQIU TEACHERS COLLEGE
2015年
6期
53-57
,共5页
NO3-%阴离子交换树脂%吸附等温线%热力学
NO3-%陰離子交換樹脂%吸附等溫線%熱力學
NO3-%음리자교환수지%흡부등온선%열역학
NO3-%anion exchange resin%adsorption isotherm%thermodynamics
选择Amberlite IRA 402型强碱性阴离子交换树脂进行吸附去除水中NO3－的热力学实验研究。实验数据表明，树脂对5～20 mg N／L的KNO3溶液吸附率很高，均大于97％，且离子交换树脂对其交换的离子有一定的饱和容量。不同温度下，吸附平衡数据符合Freundlich和Langmuir 吸附等温方程，表明了这两种方程都可以较好地描述该树脂对NO3－的吸附过程。不同温度下，树脂IRA402对NO3－吸附过程的ΔG为负值，ΔH和ΔS均为正值，表明树脂对NO3－的吸附为可以自发进行，且是吸热、熵增的过程，通过采取升温的方法有利于吸附更完全、更快速地进行。
選擇Amberlite IRA 402型彊堿性陰離子交換樹脂進行吸附去除水中NO3－的熱力學實驗研究。實驗數據錶明，樹脂對5～20 mg N／L的KNO3溶液吸附率很高，均大于97％，且離子交換樹脂對其交換的離子有一定的飽和容量。不同溫度下，吸附平衡數據符閤Freundlich和Langmuir 吸附等溫方程，錶明瞭這兩種方程都可以較好地描述該樹脂對NO3－的吸附過程。不同溫度下，樹脂IRA402對NO3－吸附過程的ΔG為負值，ΔH和ΔS均為正值，錶明樹脂對NO3－的吸附為可以自髮進行，且是吸熱、熵增的過程，通過採取升溫的方法有利于吸附更完全、更快速地進行。
선택Amberlite IRA 402형강감성음리자교환수지진행흡부거제수중NO3－적열역학실험연구。실험수거표명，수지대5～20 mg N／L적KNO3용액흡부솔흔고，균대우97％，차리자교환수지대기교환적리자유일정적포화용량。불동온도하，흡부평형수거부합Freundlich화Langmuir 흡부등온방정，표명료저량충방정도가이교호지묘술해수지대NO3－적흡부과정。불동온도하，수지IRA402대NO3－흡부과정적ΔG위부치，ΔH화ΔS균위정치，표명수지대NO3－적흡부위가이자발진행，차시흡열、적증적과정，통과채취승온적방법유리우흡부경완전、경쾌속지진행。
The thermodynamic behavior of nitrate adsorption from water with IRA 402 strong -base anion -exchange resin was researched .The results indicated nitrate adsorption rate was very high , greater than 97% for IRA 402 resin.Whereas ion exchange resin have certain saturation capacity for the exchange of ions .The experimental data were well fitted by Freundlich and Langmuir equation which showed that these two equations could well describe the resin adsorption process of NO 3-.The adsorption process was spontaneous for Gibbs free energy change ΔG<0 .The enthalpy change ΔH of the nitrate adsorption process was positive , which indicated the process was endothermic .The entropy change ΔS >0 , indicated that the adsorption was an entropic increasing process.Therefore, by adopting heating method is conducive to the adsorption more complete and faster .
