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›› 2010, Vol. 10 ›› Issue (6): 1098-1103.

• 反应与分离 • 上一篇    下一篇

活性染料在D201大孔树脂上的脱色性能

钱永 黄天寅 王东田 程宏英 龚菁   

  1. 苏州科技大学化学与生物工程学院 苏州科技大学环境科学与工程学院 苏州科技大学化学与生物工程学院 苏州科技大学化学与生物工程学院 苏州科技大学化学与生物工程学院
  • 收稿日期:2010-08-30 修回日期:2010-11-10 出版日期:2010-12-20 发布日期:2010-12-20
  • 通讯作者: 钱永

Decolorization of KN-B, K-2BP and KN-R Dyes onto Macroporous Anion Resin (D201)

QIAN Yong HUANG Tian-yin WANG Dong-tian CHEN Hong-ying GONG Jing   

  1. College of Chemical and Biological Engineering, University of Science and Technology of Suzhou College of Environmental Science and Technology, University of Science and Technology of Suzhou College of Chemical and Biological Engineering, University of Science and Technology of Suzhou College of Chemical and Biological Engineering, University of Science and Technology of Suzhou College of Chemical and Biological Engineering, University of Science and Technology of Suzhou
  • Received:2010-08-30 Revised:2010-11-10 Online:2010-12-20 Published:2010-12-20
  • Contact: QIAN Yong

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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298 K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133.28 mg/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.

关键词: 活性染料, D201树脂, 吸附, 脱色

Abstract: 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-R>KN-B>K-2BP.

Key words: reactive dye, D201 resin, adsorption, decolorization