Abstract

Saeedeh Hashemian

DOI : http://dx.doi.org/10.13005/ojc/300478

Adsorption of violet B azo dye from aqueous solutions was studied by different cellulose agriculturalwaste materials (almond shell (AS), pistachio shell (PS), walnut shell (WS), Tea waste (TW) and orange peel (OP)). Cellulose agricultural waste sorbents characterized by FTIR and SEM methods. The effects of different parameters such as contact time, pH, adsorbent dosage and initial dye concentration were studied.Maximum removal of dye was obtained at contact time of 90 min and pH 11.The adsorption of violet B was fitted by pseudo-second-order kinetic model.The Langmuir isotherm model was better fitted than Freundlichmodel. The results showed that the adsorption efficiency of violet B by cellulose agricultural waste materials is as followed: Almond shell > Orange peel > Pistachio shell > Tea waste> Walnut shell.The maximum adsorption capacity was obtained 96, 82, 71.4, 55.5 and 48.7 mg g⁻¹ for AS, OP, PS, TW and WS, respectively.

Adsorption; Agricultural wastes; Cellulose-based wastes; Violet B

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