Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (3): 130-136,150.doi: 10.3969/j.issn.1000-565X.2015.03.019

• Environmental Science & Technology • Previous Articles     Next Articles

Adsorption Property of Aerobic Granular Sludge for Sunset Yellow in Aqueous Solutions

Zhang Yan-zhuo Li Jun Li Yun Chen Guang-hui Bian Wei   

  1. College of Architecture and Civil Engineering∥Key Laboratory of Beijing for Water Quality Science and Water Environment Ｒecovery Engineering，Beijing University of Technology，Beijing 100124，China
  • Online:2015-03-25 Published:2015-02-10
  • Contact: 李军(1964-)，男，教授，博士生导师，主要从事污水处理理论与技术研究． E-mail: jglijun@bjut.edu.cn
  • About author:张彦灼(1987-)，男，博士生，主要从事污水处理理论与技术研究． E-mail: 83995983@ qq． com
  • Supported by:
    Supported by the National Water Pollution Control and Treatment Science and Technology Major Project(2014ZX07406002)

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Abstract: The ability of aerobic granular sludge (AGS) to adsorb sunset yellow (SY) in aqueous solutions is inves-tigated，and the adsorption process affected by pH value，adsorbent dosage，initial SY concentration and tempera-ture is explored． The results show that (1) pH value is an important influencing factor of adsorption efficiency;(2) the best adsorption is achieved at a pH value of 2，an AGS dosage of 2 g/L and a temperature of 35℃;(3) the equilibrium adsorption capacity is positively correlated with the initial SY concentration; and (4) the equilibrium adsorption data accord the Langmuir model and the pseudo-second-order kinetic model well，with a saturated SY adsorption capacity of 142． 86 mg/L． Thermodynamic analysis indicates that the adsorption process is spontaneous and endothermic for dye，and that low SY concentration benefits the adsorption affinity． Thus，it comes to the conclusion that AGS can be used as a low-cost adsorbent for the removal of SY dye from wastewater．

Key words: adsorption, kinetics, thermodynamics, aerobic granular sludge, sunset yellow