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RECOVERY OF p-AMINOPHENOL (PAP) FROM AQUEOUS SOLUTION BY hyper-cross-linked resin AND ITS USE FOR WASTEWATER TREATMENT

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Chinese Journal of Reactive Polymers 2008年第Z1期 18-28页

作者： ZHANG Haiyun1,2 LI Aimin1,3 1. School of the Environment, and State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093, China 2. Department of the Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China 3. Engineering Technology Research Center of Organic Pollutants Control and Resource reuse of Jiangsu Province, Nanjing 210038, China

p-Aminophenol （PAP）, a typical amphoteric compound, has been widely used as raw chemical material and important intermediate in various fields. To study on the recovery of PAP, an experimental comparison of the adsorption and desorption properties of PAP onto three types of hyper-cross-linked resins in aqueous solutions was performed. This paper focuses on the static equilibrium adsorption and desorption behaviors, the adsorption thermodynamics, the column dynamic adsorption and desorption, and other influencing factors of adsorption, such as temperature and pH values. All the isothermal data fit well to the Freundlich model. The capacity of equilibrium adsorption for PAP on NG-10 is the highest within the temperature range 288K318K,which may greatly contribute to the advantage in specific surface area, especially the micropore area, of the adsorbent. While in the desorption experiments, NG-9 achieved relative well regeneration efficiency whether by ethanol or by 4% hydrochloric acid. Furthermore, the results of column tests and field applications were also proved that NG-9 was an effective sorbent for the reclamation PAP from wastewater.

关键词： Adsorption p-Aminophenol hyper-cross-linked resin Recovery.

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