The Relation Between Adsorption Resistances During Removal of Colour in Sugar Mill Effluent | ||
| Egyptian Journal of Chemistry | ||
| Article 56, Volume 64, Issue 10, October 2021, Pages 5963-5974 PDF (668.31 K) | ||
| Document Type: Review Articles | ||
| DOI: 10.21608/ejchem.2021.70113.3543 | ||
| Authors | ||
| Olfat Abdel Shafi Fadaly1; Hanan A Kelany2; Rasha H Ali3; Mamduh Nassar4; marwa mostafa abdelati* 2 | ||
| 1Chem. Eng. Dep., MInia Uni. | ||
| 2chemical engineering, faculty of engineering, Minia university, minia, Egypt | ||
| 3chemical engineering department, faculty of engineering, Minia uiniverisity | ||
| 4Minia university Faculty of engineering Chemical engineering department | ||
| Abstract | ||
| Phenolic compounds are the major source of colour in sugar mill effluent. Details mechanism of diffusional resistances for removal of phenolic compounds namely: phenol, 2-4 dichlrophenol and 2-4 dinitrophenol by adsorption onto activated carbon rice husk (ACRH) was studied. The mechanism studied was based on three diffusional resistance models: external mass transfer, intraparticle diffusion and twin resistance mass transfer. The relationship of mass transfer coefficient versus time shows that the adsorption process follows two regimes started with high mass transfer and then low mass transfer, due to high diffusion from bulk to surface of ACRH particles then slow mass transfer into pores of ACRH. The comparison between the three models was followed up by using the relationship of mass transfer coefficient versus time (kα cn). It was found that adsorption of phenol in the intraparticle structure is 180% higher than adsorption on the external surface of the ACRH. The value of mass transfer coefficient of the twin resistance model is close to that of external mass transfer model and both are lower than that of intraparticle diffusion model. The experimental results proved that intraparticle diffusion is controlling step. Moreover, three adsorption isotherms were studied: Langmuir, Freundlich and Dubinini -Roduch (D-R) for the three phenolic compounds. | ||
| Keywords | ||
| Key words: mass transfer; two resistances; single resistance; phenolic compounds; activated carbon; adsorption; ion exchange | ||
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