algerian journal of environmental science and technology
Volume 5, Numéro 1, Pages 841-851
2019-03-30

Optimization Of Preparation And Application Of Activated Carbon Derived From Cypress Cones



Authors : Khellouf M. .

Abstract

The present paper concerns the valorization of a botanic solid waste to synthetize an activated carbon from the cypress cones (Cupressus sempervirens cones) that grows spontaneously in the north region of Algeria. The goal and the novelty of this study is the feasibility of chemical activation with orthophosphoric acid of cypress cones as a new low-cost precursor. The performance of this activated carbon is tested in batch adsorption of the basic dye (methylene blue) from aqueous solutions. An experimental factorial design was used to determine the interaction effects of the operating conditions for both steps activation and carbonization. The maximum 97.29 % of dye elimination was obtained with the optimal activated carbon (AC) produced under the operating conditions, impregnation mass ratio of 1:1 for 5 hours and carbonization at 873 K for 4 hours. The effects of pH solution, initial dye concentration, mass adsorbent, and temperature on the adsorption of methylene blue on optimal AC are also studied. The adsorption kinetics were determined from aqueous dye solution and correctly described by the pseudo-second-order model. The adsorption isotherms were modeled with the Langmuir, Freundlich, Temkin and Jovanovic models, it was found that Freundlich and Temkin models are the best models to describe the adsorption mechanism. The efficiency of industrial textile wastewater treatment by adsorption on the optimal activated carbon gave a good elimination of COD, color, and TSS over 50% of removal.

Keywords

Cypress cones; Adsorption; Activated carbon; Methyleneblue; Experimental design.

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