Influence of selected amides and adsorbent particle size on the adsorption of p-nitrophenol on granulated activated carbon.

Environmental Technology
Branko B KordićJelena S Tričković

Abstract

In this paper, the influence of selected amides on the adsorption of p-nitrophenol was investigated. Commercial granulated activated carbon DARCO was used as an adsorbent. Granulations of 20-40 and 12-20 mps were used in the experiments. The presence of N-benzylbenzamide and N-methylbenzamide in the system lowered the adsorption capacity of p-nitrophenol, while N-methylpropionamide did not show influence on the adsorption capacity. The equilibrium adsorption capacities for p-nitrophenol were 46.8 mg g-1 for the smaller granulation (20-40 mps), and 45.4 mg g-1 for the larger granulation (12-20 mps). The presence of the amide in the system reduced the adsorption capacity of p-nitrophenol to as much as 6.7 mg g-1. Weber-Morris model showed two distinct phases in the adsorption process, and they were attributed to the external (film) and intraparticle diffusion. For the estimation of the adsorption mechanism external mass transfer coefficient and effective intraparticle diffusivity coefficient were obtained. Obtained Biot number values are in the range of 0.17-0.50 for the smaller granulation, and 0.03-0.29 for the larger granulation. The external diffusion is the rate-limiting step, however, both steps in the diffusion process sho...Continue Reading

References

Nov 22, 2008·Journal of Hazardous Materials·Mohammad A Al-GhoutiStephen Allen
May 22, 2009·Water Research·J HuangM Nieuwenhuijsen
Jul 17, 2010·Advances in Colloid and Interface Science·Anu MatilainenMika Sillanpää
Jan 18, 2018·Journal of Colloid and Interface Science·Renata Aparecida FidelesLeandro Vinícius Alves Gurgel

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