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.
Prečišćavanje otpadne vode posle bojenja vune metal-kompleksnom bojom uz pomoć pepela iz gradske toplane ispitivano je pod različitim uslovima. Nađeno je da adsorpcija zavisi od vremena kontaktiranja, početne koncentracije boja, količine adsorbenta, temperature i pH rastvora. Prema rezultatima, može se konstatovati da je pepeo toplane relativno efikasan adsorbent za uklanjanje metal-kompleksne boje iz vodenih rastvora. Količina uklonjene boje se smanjuje sa povećanjem početne koncentracije boje u rastvoru, ali stvarna količina adsorbovane boje raste povećanjem koncentracije boje. Prisutan je kontinuitet rasta količine uklonjenih boja sa masom adsorbenta. Temperatura nema većeg uticaja na tok adsorpcije.
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