Bi-amino surface functionalized nanoparticles: synthesis and binary system dye removal from wastewater containing anionic dyes

In this paper, copper oxide nanoparticle was synthesized, and its surface was modified using N-(2aminoethyl)-3-(trimethoxysilyl)propylamine.The bi-amino surface functionalized nanoparticle (BASFN) was used to remove anionic dyes from single and binary systems.The scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, energy-dispersive X-ray spectroscopy (EDAX) and X-ray diffraction were used to characterize the nanoparticle.Direct Red 80 (DR80) and Direct Green 6 (DG6) were used as anionic dyes.The effect of adsorbent dosage, dye concentration and pH on dye removal was evaluated.Kinetic of dye adsorption on BASFN followed pseudo-second order.The results showed that the experimental data were correlated reasonably well by Langmuir and Freundlich isotherm in single and binary system, respectively.The maximum dye adsorption capacity (Q 0 ) of BASFN was 217 and 250 mg/g for DR80 and DG6, respectively.