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Volume 19 No 5 (2021)
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Direct Yellow 8 Azo Removal by Bentonite Clay Solution: Experimental and Theoretical Studies
Sanaa Tareq , Masar Ali Awad , Khawla Kani Jasim , Shahad Kadhim Taher , Mustafa M. Kadhim
Abstract
In the theoretical part, removal of direct yellow 8 (DY8) from water solution was accomplished using Bentonite Clay
as an adsorbent. Under batch adsorption, the adsorption was observed as a function of contact time, adsorbent
dosage, pH, and temperature. The equilibrium data were fitted with the Langmuir and Freundlich adsorption models,
and the linear regression coefficient R2 was used to determine the best fitting isotherm model. thermodynamic
parameters of the ongoing adsorption mechanism, such as Gibb's free energy, enthalpy, and entropy, have also been
measured
Keywords
Adsorption, Direct Yellow 8, Bentonite, DFT, TED
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