_1679168751
1679168751
Hamid Shirkhanloo
sahar.zi67@gmail.com
Hamid Shirkhanloo
Analytical Methods in Environmental Chemistry Journal
AMECJournal
2645-5382
2645-5552
03
30
2023
6
01
10.24200/amecj.v6.i01
http://journal.amecj.com/index.php/AMECJ-01/issue/view/25
Adsorption behavior of Crys tal Violet dye in aqueous solution using Co+2 hectorite composite as adsorbent surface
Ahmed Jaber
Ibrahim
This study focused on the adsorption behavior of the cationic CrystalViolet (CV) dye from aqueous solutions using a Co+2‒hectoritecomposite as an adsorbent surface. The initial and equilibrium CV dyeconcentrations were determined using a UV-Vis spectrophotometer. Theresults were discussed and presented for the impacts of pH, primary CVdye concentration, composite dosage, and temperature. The optimumconditions were found for eliminating Crys tal Violet dye from theaqueous solution at a pH 4, ideal temperature 293 K, and 0.5 g L-1of composite dose. The pseudo-second-order kinetic, intraparticlediffusion analyzed the tes ts’ data and film diffusion models. Eachmodel’s defining features have been identified, and these models werein good agreement and in charge of regulating the adsorption reaction.The adsorption operation was also thermodynamically examined todetermine thermodynamic variables such as Gibbs free energy (ΔGo),entropy (ΔSo), activation energy (Ea), and enthalpy (ΔHo). The negativevalue of Gibbs free energy (ΔGo) and enthalpy (ΔHo) indicated thatthe adsorption process was a spontaneous and exothermic reaction.While the activation energy (Ea) data which fell within the normalrange for physisorption, was showed at 22.434 kJ mol-1. The physical adsorption occurs between CV dye and adsorbent .
03
30
2023
5
16
http://creativecommons.org/licenses/by/4.0
10.24200/amecj.v6.i01.219
http://journal.amecj.com/index.php/AMECJ-01/article/view/219
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http://journal.amecj.com/index.php/AMECJ-01/article/download/219/471
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http://journal.amecj.com/index.php/AMECJ-01/article/download/219/471
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http://journal.amecj.com/index.php/AMECJ-01/article/download/219/472