Modification of Nickel Ferrite with Cationic Surfactant: Dye Removal from Textile Wastewater Using Magnetic Separation

作者：Narian Elham; Arami Mokhtar^*; Bahrami Hajir; Pajootan Elmira

来源：Journal of Environmental Engineering (United States), 2015, 141(2): 05014006.

DOI：10.1061/(ASCE)EE.1943-7870.0000888

• Adsorption
• Cetyltrimethyl ammonium bromide (CTAB)-NiFe2O4
• Dye removal
• Isotherm
• Kinetics

In this paper, the modification of nickel ferrite nanoparticles with cationic surfactant [ cetyltrimethyl ammonium bromide ( CTAB)] and its capability as a magnetic adsorbent for the removal of direct dyes ( Direct Red 31, Direct Red 81, and Direct Red 80) from textile wastewater have been investigated. The Fourier-transformm infrared ( FTIR) analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM) images, and the determination of isoelectric point ( pH at point of zero charge), were used to analyze the morphology to characterize the synthesized magnetic adsorbent. The effect of operating parameters including pH, initial dye concentration, adsorbent dosage, and inorganic salts on the dye removal efficiency was studied. The results showed that varying the pH of solution did not affect the dye removal efficiency. It was also concluded that by increasing the adsorbent dosage the available adsorption sites and the dye removal efficiency would increase. Adsorption isotherms such as Langmuir, Freundlich, and Tempkin were investigated and the results showed that Direct Red 31 and Direct Red 81 had followed all of the mentioned isotherms, and Direct Red 80 had followed Langmuir isotherm. The kinetics studies showed that the dye removal was conformed to the pseudo-second-order kinetic. Finally, it was concluded that the modified nickel ferrite (i.e., CTAB-NiFe2O4) could be used efficiently for dye removal from textile effluents followed by easy magnetic separation of adsorbent.

• 出版日期2015-2