Contact time optimization of two-stage batch adsorber design using second-order kinetic model for the adsorption of phosphate onto alunite

Journal of Hazardous Materials
Mahmut Ozacar

Abstract

The adsorption of phosphate onto alunite in a batch adsorber has been studied. Four kinetic models including pseudo first- and second-order equation, intraparticle diffusion equation and the Elovich equation were selected to follow the adsorption process. Kinetic parameters, rate constants, equilibrium adsorption capacities and related correlation coefficients, for each kinetic model were calculated and discussed. It was shown that the adsorption of phosphate onto alunite could be described by the pseudo second-order equation. Adsorption of phosphate onto alunite followed the Langmuir isotherm. A model has been used for the design of a two-stage batch adsorber based on pseudo second-order adsorption kinetics. The model has been optimized with respect to operating time in order to minimize total operating time to achieve a specified amount of phosphate removal using a fixed mass of adsorbent. The results of two-stage batch adsorber design studies showed that the required times for specified amounts of phosphate removal significantly decreased. It is particularly suitable for low-cost adsorbents/adsorption systems when minimising operating time is a major operational and design criterion, such as, for highly congested industrial ...Continue Reading

References

May 20, 2000·Chemosphere·K C Cheung, T H Venkitachalam
May 29, 2002·Journal of Hazardous Materials·Gurusamy AnnaduraiDuu-Jong Lee
Feb 27, 2003·Chemosphere·Mahmut Ozacar
Mar 12, 2003·Journal of Hazardous Materials·Mahmut Ozacar, I Ayhan Sengil
Nov 1, 2005·Journal of Colloid and Interface Science·H BouhamedA Magnin

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Citations

Apr 5, 2012·Chemistry Central Journal·Ting-Ting ZhengAllan Holmgren
May 3, 2011·Journal of Hazardous Materials·Ling ZhangXinze Wang
Sep 12, 2009·Journal of Hazardous Materials·Gamal S ElShafeiS G M Mohammad
Dec 7, 2007·Journal of Hazardous Materials·Emrah BulutI Ayhan Sengil
Jul 31, 2007·Journal of Hazardous Materials·Honglei LiuChun Hu
Mar 15, 2011·Journal of Colloid and Interface Science·Adva Zach-MaorHilla Shemer
Aug 7, 2012·Chemical & Pharmaceutical Bulletin·Fumihiko OgataNaohito Kawasaki
Nov 27, 2021·The Science of the Total Environment·Shixi WuYinping Zhang

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