283 publications from this institution
In this paper, copper oxide nanoparticle was synthesized and its surface was functionalized to remove dyes from single systems. The characteristics of the adsorbent were studied using Fourier transform infrared, X-ray diffraction, and scanning electron microscopy. Direct Red 31 (DR31) and Direct Red 80 (DR80) were used as model dyes. Least-squares support vector machine was used to predict dye removal. The model shows better performance in predicting dye removal compared to the kinetic models with average absolute percent relative error of 3.278 and 3.787% for DR31 and DR80, respectively, and correlation coefficients close to unity. Therefore, the used model could be reliable for prediction of the dye removal efficiency.
The magnetic adsorbent nanoparticle was modified using cationic surface active agent. Zinc ferrite nanoparticle and cetyl trimethylammonium bromide were used as an adsorbent and a surface active agent, respectively. Dye removal ability of the surface modified nanoparticle as an adsorbent was investigated. Direct Green 6 (DG6), Direct Red 31 (DR31) and Direct Red 23 (DR23) were used. The characteristics of the adsorbent were studied using Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effect of adsorbent dosage, initial dye concentration and salt was evaluated. In ternary system, dye removal of the adsorbent at 90, 120, 150 and 200 mg/L dye concentration was 63, 45, 30 and 23% for DR23, 97, 90, 78 and 45% for DR31 and 51, 48, 42 and 37% for DG6, respectively. It was found that dye adsorption onto the adsorbent followed Langmuir isotherm. The adsorption kinetic of dyes was found to conform to pseudo-second order kinetics.
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