摘要
采用离子交换树脂为吸附剂,研究了其吸附水杨酸过程的热力学和动力学。通过树脂筛选实验发现强碱性阴离子交换树脂KIP210对水杨酸的吸附效果最好,并进一步考察了振荡速度、树脂用量、pH、水杨酸初始浓度和温度等因素对KIP210树脂吸附性能的影响,且探究了树脂的再生情况。结果表明,振荡速度大于160r/min后,外扩散对吸附的影响已基本消除,pH为5时吸附性能最佳。KIP210树脂对水杨酸的吸附率大体上随树脂用量、温度的上升而增大,随水杨酸初始浓度的上升而减小。热力学研究显示,KIP210树脂对水杨酸的吸附符合Langmuir方程,且是一个吸热的熵驱动和自发的吸附过程。动力学研究显示吸附过程符合准一级动力学,吸附活化能为13.9kJ/mol。使用8%(质量分数)氯化钠和6%(质量分数)氢氧化钠混合溶液可很好地实现对树脂的脱附再生。
The adsorption thermodynamics and kinetics of salicylic acid in aqueous solution were studied by anion exchange resin as adsorbent.Series of resin selection experiments were carried out and the strong base anion exchange resin KIP210 showed the maximum equilibrium adsorption capacity in terms of the removal of salicylic acid from aqueous solution.The effect of various factors such as oscillation speed,resin dosage,pH,initial salicylic acid concentration and temperature on the adsorption were investigated by static experiment.The regeneration of resin KIP210 was also explored.The results indicated that the effect of external diffusion was eliminated at 160 r/min and the best solution pH was 5.The removal efficiency of salicylic acid increased with an increase of the resin dosage,temperature and a decrease of the initial concentration of salicylic acid within a certain range.The adsorption of salicylic acid on KIP210 agreed well with the Langmuir isotherm and the adsorption of salicylic acid on KIP210 was a spontaneously endothermic adsorption process.Furthermore,the adsorption of salicylic acid on the resin could be well described by apseudo-first-order kinetic model and the activation energy was 13.9 kJ/mol.KIP210 was successfully regenerated using the 8%(mass fraction)sodium chlorideand and 6%(mass fraction)sodium hydroxidesolution.
引文
[1]于振云.水杨酸的合成与应用进展[J].化工中间体,2003(21):27-32.
[2]王学江,张全兴,赵建夫,等.水杨酸生产废水的治理与资源化[J].环境污染治理技术与设备,2005,6(1):62-67.
[3]曹广宏.水杨酸的合成及其应用[J].辽宁化工,1994(3):33-41.
[4]胡俊杰,李学字,魏春城.络合萃取法处理高浓度含酚废水的研究[J].化工矿物与加工,2001,30(12):6-7,14.
[5] GARZA CAMPOS B,BRILLAS E,HERNNDEZ RAMREZ A,et al.Salicylic acid degradation by advanced oxidation processes.Coupling of solar photoelectro-Fenton and solar heterogeneous photocatalysis[J].Journal of Hazardous Materials,2016,319:34-42.
[6] HU R K,ZHANG L F,HU J Y.Study on the kinetics and transformation products of salicylic acid in water via ozonation[J].Chemosphere,2016,153:394-404.
[7] ZHANG Q,ZHU J,WANG Y,et al.Electrochemical assisted photocatalytic degradation of salicylic acid with highly ordered TiO2nanotube electrodes[J].Applied Surface Science,2014,308(8):161-169.
[8] KHARDENAVIS A A,KAPLEY A,PUROHIT H J.Salicylicacid-mediated enhanced biological treatment of wastewater[J].Applied Biochemistry and Biotechnology,2010,160(3):704-718.
[9] ODIZE V,RAHMAN A,JONES K,et al.Removal of 17α-ethinylestradiol,salicylic acid,trimethoprim,carbamazepine and nonylphenol through biological carbon and nitrogen removal processes[J].Water and Environment Journal,2017,31(3):440-449.
[10] INCI I.The extraction of salicylic acid from aqueous solutions using tertiary amines[J].Revista de Chimie,2002,53(12):790-794.
[11] OTERO M,GRANDE C A,RODRIGUES A E.Adsorption of salicylic acid onto polymeric adsorbents and activated charcoal[J].Reactive&Functional Polymers,2004,60(4):203-213.
[12] BONINA F P,GIANNOSSI M L,MEDICI L,et al.Adsorption of salicylic acid on bentonite and kaolin and release experiments[J].Applied Clay Science,2007,36(1/2/3):77-85.
[13] POLAKOVIC M,GORNER T,VILLIRAS F,et al.Kinetics of salicylic acid adsorption on activated carbon[J].Langmuir,2005,21(7):2988-2996.
[14] MENG M,FENG Y,ZHANG M,et al.Highly efficient adsorption of salicylic acid from aqueous solution by wollastonite-based imprinted adsorbent:a fixed-bed column study[J].Chemical Engineering Journal,2013,225:331-339.
[15] OTERO M,ZABKOVA M,RODRIGUES A E.Comparative study of the adsorption of phenol and salicylic acid from aqueous solution onto nonionic polymeric resins[J].Separation and Purification Technology,2005,45(2):86-95.
[16]谢祖芳,童张法,陈渊,等.717阴离子交换树脂选择吸附分离水杨酸和苯酚[J].高校化学工程学报,2011,25(1):49-54.
[17] LAI B,ZHOU Y X,QIN H K,et al.Pretreatment of wastewater from acrylonitrile-butadiene-styrene(ABS)resin manufacturing by microelectrolysis[J].Chemical Engineering Journal,2012,179:1-7.
[18] LI C,ZHONG H,ZHOU L,et al.Study on adsorption characteristic of macroporous resin to phenol in wastewater[J].Canadian Journal of Chemical Engineering,2010,88(3):417-424.
[19] MOAZED H.Ammonium ion removal from wastewater by a natural resin[J].Journal of Environmental Science&Technology,2008,1(1):11-18.
[20] HO Y S,WASE D J,FORSTER C F.Batch nickel removal from aqueous solution by sphagnum moss peat[J].Water Research,1995,29(5):1327-1332.
[21]徐龙君,刘科,张福凯.磁性活性炭处理含铜废水[J].环境工程学报,2012,6(9):3121-3124.
[22] YANG J B,YU M Q,CHEN W T.Adsorption of hexavalent chromium from aqueous solution by activated carbon prepared from longan seed:kinetics,equilibrium and thermodynamics[J].Journal of Industrial and Engineering Chemistry,2015,21:414-422.
[23]陈一良,潘丙才,孟凡伟,等.苯酚及对硝基酚在大孔树脂上吸附等温线的研究[J].离子交换与吸附,2004,20(3):205-213.
[24]孟冠华,刘宝河,郑俊,等.水杨酸修饰聚苯乙烯对Pb2+和Cu2+的吸附[J].应用化学,2009,26(2):219-223.
[25] WANG Y,WANG X,WANG X J,et al.Adsorption of Pb(Ⅱ)from aqueous solution to Ni-doped bamboo charcoal[J].Journal of Industrial and Engineering Chemistry,2013,19(1):353-359.
[26] BANERJEE S,SHARMA Y C.Equilibrium and kinetic studies for removal of malachite green from aqueous solution by a low cost activated carbon[J].Journal of Industrial and Engineering Chemistry,2013,19(4):1099-1105.
[27]谢祖芳,童张法,朱万仁,等.D201树脂对水杨酸的吸附热力学与动力学[J].化学世界,2010,51(5):278-281.
[28]谢祖芳,陈渊,戴艳菊,等.717阴离子交换树脂吸附磺基水杨酸[J].过程工程学报,2007,7(2):278-282.
