摘要
研究了活性染料KN-B,K-2BP和KN-R在D201大孔树脂上的吸附特性.结果表明,3种染料的吸附脱色率均随初始pH值降低、温度升高、染料初始浓度降低、树脂用量增加及NaCl浓度提高而增加.在pH=7和温度298K条件下,3种染料在D201上的等温吸附规律均符合Freundlich和Langmuir模型,最大饱和吸附量分别为129.38,94.79和133.28mg/g,吸附为物理性自发吸附过程.动力学实验数据用准一级和准二级模型方程处理,准一级拟合比准二级拟合更接近实验值,相同条件下3种活性染料在D201上的吸附效果为KN-R>KN-B>K-2BP.
The adsorption behavior of reactive black 5 （KN-B）,reactive red 24 （K-2BP） and reactive blue 19 （KN-R） dyes onto a macroporous strong basic anion exchange resin （D201） was investigated. It was found that their decolorization rates onto D201 all increased with the increase of temperature,doses of D201 and NaCl concentration and with the decrease of initial pH value and initial reactive dye concentration. Under pH=7 and 298 K,the adsorption isotherms indicated that the equilibrium data successfully fitted to Freundlich and Langmuir adsorption isotherms,the maximum adsorption capacity for KN-B,K-2BP and KN-R is 129.38,94.79 and 133.28 mg/g,respectively. The adsorptions are physical and spontaneous processes. Pseudo first-order,pseudo second-order and intra-particle diffusion theoretical models were applied to correlate the kinetic experimental data. Pseudo first-order kinetic model was more accordant with the experimental data than pseudo second-order kinetic model. The order of adsorbing decolorization effect of the reactive dyes onto D201 from high to low was KN-RKN-BK-2BP.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第6期1098-1103,共6页
The Chinese Journal of Process Engineering
基金
住房和城乡建设部科技计划基金资助项目(编号:2008-K6-4)
关键词
活性染料
D201树脂
吸附
脱色
reactive dye
D201 resin
adsorption
decolorization
