Abstract
The removal of dyes from coloured effluents, in particular from the textile industry, is currently one of the major environmental concerns. Current methods for removing dyes from wastewater are costly and cannot be used effectively to treat a wide range of such wastewaters. Thus, we investigated the removal of methylene blue dye from aqueous solution using iron oxide magnetic nanoparticles coated with sugarcane bagasse. This newly and low-cost adsorbent was analysed with Fourier Transform Infrared Spectrophotometer followed by optimisation of its physicochemical parameters such as contact time, initial dye concentration, adsorbent dosage, and pH of dye solution. The study showed that the adsorption of methylene blue was pH dependent and the highest removal (98%) was obtained at pH 7. The optimum conditions were also achieved by using 10 mg/L dye concentration, 0.6 gram dose of adsorbent and 60 minutes adsorption time. The results obtained followed the pseudo-second-order kinetics and the adsorption was fitted well to the Langmuir isotherm model where the maximum adsorption capacity (Qm) was 37.45 mg/g. It is suggested that iron oxide magnetic nanoparticles coated with sugarcane bagasse is a potential low-cost adsorbent for the dye removal from industrial wastewater.
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