超声场中苯酚在NKAⅡ树脂上脱附扩散系数估算  

ESTIMATION OF DIFFUSION COEFFICIENTS OF PHENOL DESORPTION FROM NKAⅡ RESIN UNDER ULTRASONIC FIELD

作　　者：李祥斌[1] 李忠[1] 奚红霞[1] 谢兰英[1] 王红娟[1] 

机构地区：[1]华南理工大学化学工程研究所,广东广州510640

出　　处：《化工学报》2002年第3期321-325,共5页CIESC Journal

基　　金：国家自然科学基金 (No .2 993 610 0 );广东省自然科学基金资助项目~~

摘　　要：Phase equilibrium and kinetic experiments of phenol on NKAⅡ resin under ultrasonic field and non-ultrasonic field were separately conducted at normal temperature.The model for estimating diffusion coefficient of phenol on the NKAⅡ resin was established.Results showed that application of ultrasound can change the phase equilibrium state of NKAⅡ/phenol/water system which has reached equilibrium under normal condition.The phase equilibrium state of the system shift towards decrease in the amount adsorbed of phenol on NKAⅡ resin.In addition, acoustic cavitation could make diffusion coefficient of phenol in NKAⅡ resin in ultrasonic field increase by one order of magnitude in comparison with the diffusion coefficient determined in non-ultrasonic field.The diffusion coefficient increased with the increase in acoustic power.However,it was found that if the acoustic intensity was larger than 0.057?W·cm -2 , slight pulverization of the NKAⅡ resin occurred, which should be avoided in application.Phase equilibrium and kinetic experiments of phenol on NKAⅡ resin under ultrasonic field and non-ultrasonic field were separately conducted at normal temperature.The model for estimating diffusion coefficient of phenol on the NKAⅡ resin was established.Results showed that application of ultrasound can change the phase equilibrium state of NKAⅡ/phenol/water system which has reached equilibrium under normal condition.The phase equilibrium state of the system shift towards decrease in the amount adsorbed of phenol on NKAⅡ resin.In addition, acoustic cavitation could make diffusion coefficient of phenol in NKAⅡ resin in ultrasonic field increase by one order of magnitude in comparison with the diffusion coefficient determined in non-ultrasonic field.The diffusion coefficient increased with the increase in acoustic power.However,it was found that if the acoustic intensity was larger than 0.057?W·cm -2 , slight pulverization of the NKAⅡ resin occurred, which should be avoided in application.

关 键 词：超声波 扩散系数 苯酚 脱附 NKAⅡ树脂 超声场 估算 废水处理 有机污染物 吸附 

分 类 号：X703.1[环境科学与工程—环境工程] TQ028[化学工程]