Decolorization of model wastewater by adsorbent obtained from waste hemp fibers

Water pollution has already become a significant worldwide problem, especially in the textile dyeing industry. This paper describes decolorization of dye water modelled by textile dye wastewater. Decolorization was performed on an adsorbent made from physicochemically modified waste hemp fibers, obt...

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Bibliographic Details
Published in:	Chemical Industry and Chemical Engineering Quarterly Vol. 25; no. 1; pp. 11 - 19
Main Authors:	Konstantinović Sandra S., Kodrić Marija G., Ničić Radica, Đorđević Dragan M.
Format:	Journal Article
Language:	English
Published:	Association of the Chemical Engineers of Serbia 01-01-2019
Subjects:	adsorption decolorization hemp fibers Langmuir isotherms reactive dye
Online Access:	Get full text
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Summary:	Water pollution has already become a significant worldwide problem, especially in the textile dyeing industry. This paper describes decolorization of dye water modelled by textile dye wastewater. Decolorization was performed on an adsorbent made from physicochemically modified waste hemp fibers, obtained as a by-product from the production of ropes. The adsorbent is relatively dispersive and contains heterogeneous porous particles, with carbon as a dominant element. Obtained results have shown that the positive effect of adsorption directly depends on contact time, pH, temperature, and initial dye concentration. Dye concentration decreases in time, especially when the used concentration is the initial one. The effect of temperature below 40 °C is not significant, but adsorption gets more intensive when performed at 60 °C. The higher degree of decolorization is achieved at lower initial dye concentrations, although the highest initial dye concentration leads to higher dye adsorption. The experimental results of adsorption were described by using the Langmuir model. The maximum adsorption capacity ranges from 1.98 to 2.13 mg g-1 for linear and 2.03 to 2.12 mg g-1 for nonlinear form.
ISSN:	1451-9372 2217-7434
DOI:	10.2298/CICEQ170720013K