JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (1): 133-139.

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Kinetics of the adsorption of Reactive Brilliant Red K-2BP onto    modified wheat residue

ZHONG Qian-qian, YUE Qin-yan*, LI Qian, LI Ying, XU Xing, GAO Bao-yu   

  1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
  • Received:2010-01-20 Online:2011-02-16 Published:2010-01-20

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Abstract:

For removing the dye from wastewater, the wheat residue was modified into an anion exchanger. The adsorption kinetics of Reactive Brilliant Red K-2BP (RBR K-2BP) from aqueous solutions onto modified wheat residue(MWR)were  studied in a batch reactor. Adsorption experiments were carried out as a function of pH and adsorbent dosage. In addition, the kinetic data were respectively fitted by pseudo-first-order equation, pseudo-second-order equation, Elovich equation and the intraparticle diffusion model. It was found that the pseudo-second-order equation could  provide  the best correlation to the data. The intra-particle diffusion was the main rate-controlling step for the adsorption of RBR K-2BP onto MWR. The adsorption activation energy of dye was 17.21kJ／mol, which indicated that the adsorption type  whole process was mainly of the physical adsorption.
 

Key words: modified wheat residue, adsorption, reactive brilliant red K-2BP, adsorption kinetics

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