o:2366 DECOLORIZATION OF MODEL WASTEWATER BY ADSORBENT OBTAINED FROM WASTE HEMP FIBERS en Water pollution has already become a significant worldwide problem especially in textile dyeing industry. This paper describes decolorization of dye water modelled by textile dye wastewater. Decolorization was performed on adsorbent made from physico-chemical modified waste hemp fibers, obtained as a by-product from production of ropes. Adsorbent is relatively dispersive and contains heterogeneous porous particles, with carbon as a dominant element. Obtained results have shown that 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 Langmuir model. The maximum adsorption capacity ranges from 1.98 to 2.13 mg g-1for linear and 2.03 to 2.12 mg g-1 for nonlinear form. Chemical Industry and Chemical Engineering Quarterly 25(00):13-13 hemp fibers, reactive dye, decolorization, adsorption, Langmuir isotherms. 1552099 10.2298/CICEQ170720013K 2024-03-07T10:31:35.626Z 44 yes 46 Sandra Konstantinović Faculty of Technology, University of Nis 2019 46 Marija Kodrić Faculty of Technology, University of Nis 46 Radica Nicić Faculty of Technology, University of Nis 46 Dragan Đorđević Faculty of Technology, University of Nis application/pdf 545686 https://phaidrani.ni.ac.rs/o:2366 no yes 18 70 92000001 18A15