Synthesis of Gamma Alumina Nanoparticles and Studying its Effect on the Removal of some Textile Cationic Dyes from Industrial Effluents

The present study investigates the removal of cationic textile dyes by gamma alumina nanoparticles modified with surfactant. The use of alumina nanoparticles with an anionic surfactant (sodium dodecyl sulfate) as a new and efficient adsorbent has been successfully performed to remove two dyes, basic yellow ۲۸ and basic blue ۴۱, from aqueous solutions of textile industrial effluents. The concentration of dyes was determined using spectrophotometric method and it was found that dye removal using modified nanoparticles is performed better than unmodified nanoparticles. The obtained data from scanning electron microscope, X-ray diffraction and Fourier transform infrared spectroscopy of the synthesized nano-alumina showed that surface of the nanoparticles was modified correctly. The effect of different parameters such as contact time, initial concentration of dyes, amount of adsorbent used, solution pH, temperature, interference of ions and other dyes on the removal of the studied dyes were investigated. Optimum conditions were investigated and determined by the response surface method (RSM), by studying four factors of contact time, initial concentration of dye, amount of adsorbent and pH of the effluent sample at three levels. The removal rate of the studied dyess in optimal conditions was over ۹۴%.

کلیدواژه ها:

Gamma alumina nanoparticles ، Dye removal ، Cationic dye ، Industrial effluents ، Spectrophotometry