Adsorption of Nylosan Red onto Grapes Cores-based Activated Carbon

M. Hamzaoui¹ , B. Bestani² , N. Benderdouche³ , Z.Mekkibes ⁴ , O. Douinat⁵

Section:Research Paper, Product Type: Journal-Paper
Vol.7 , Issue.3 , pp.11-19, Jun-2020

Online published on Jun 30, 2020

Copyright © M. Hamzaoui, B. Bestani, N. Benderdouche, Z.Mekkibes, O. Douinat . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
The aim of this study is to evaluate effectiveness of activated carbons prepared from grapes cores chemically activated using Calcium chloride (CaCl2), Phosphoric acid (H3PO4) and Potassium hydroxide (KOH) as oxidizing agents representing GC-1, GC-2 and GC-3 adsorbents respectively in order to remove Nylosan Red (NR) dye from simulated wastewater. Both linear and non-linear forms were used for the evaluation of two common isotherm models, Langmuir and Freundlich isotherms parameters. In order to justify the validity of the values, statistical aspects for both forms were checked by considering R2 for best fit linear isotherm and P-Values and other important errors functions such as Chi-square statistic & Root mean square error and Average percentage error for non-linear regression method. High removal efficiencies of 90.5 % and 98 % NR at adsorbent dose (4 g/L) and initial dye concentration (100 mg/L) were obtained by GC-2 and GC-3 respectively. However, 88.31 % removal was obtained by GC-1 using adsorbent dose (8 g/L). The best fit for Freundlich model in its linear form, was well represented by NR adsorption onto GC-3 with a capacity of 28.146 mg/g, with very low errors function values, while GC-1 and GC-2 were moderate. Non-linear Freundlich isotherm models present a good results compared to linear models in terms of adsorption energy, the most important is related to the adsorption of NR by GC-3 with a value equal to 42.57 mg/g, also as a finding the adsorption of NR by GC-1 presents a low but acceptable adsorption capacity compared to the adsorption isotherm using GC-2 and GC-3.

Key-Words / Index Term :
Modals; Dyes; Adsorbent; Langmuir; Freundlich; Isotherms

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