fa بهداشت محیط زیست Environmental Health پژوهشي Original Article <div style="text-align: justify;"><strong>Background and Purpose</strong>: This study aimed to investigate the adsorption of Acid Blue 62 (AB62) as an anionic dye from aqueous solution onto as SBA-15/Polyaniline (SBA-15/PAni) mesoporous nanocomposite a low-cost adsorbent and feasible.<br> <strong>Materials and Methods:</strong> Fourier transform infra-red spectroscopy (FTIR), Filed Emission Scanning Electron Microscope (FESEM), Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), and BET were used to examine the structural characteristics of obtained adsorbent. The effective parameters on batch adsorption process such as pH, dosage, and time were investigated and optimized. For determining the type of kinetic model, pseudo first order, pseudo second order, Elovich and intra-particle diffusion kinetic models were applied. Thermodynamic parameters such as changes in Gibbs free energy (&Delta;G&deg;), enthalpy (&Delta;H&deg;), and entropy (&Delta;S&deg;) were calculated.<br> <strong>Results:</strong> Maximum BET specific surface and pore volume on the adsorbent were 224.4 m2 /g and 0.46 cm3 /g, respectively. The obtained optimized condition was as follows: pH=2, time=60 min, temperature 25&deg; C, and adsorbent dose = 0.3 g/l. The adsorption kinetic data well-fitted by pseudo-second order kinetic equation. The negative values of &Delta;G&deg; and &Delta;H&deg; (- 4.012 KJ/mol) and the positive value of &Delta;S&deg; (0.409 J/mol K) showed that the AB62 adsorption process was spontaneous, physi-sorption, feasible and exothermic.<br> <strong>Conclusion:</strong> SBA-15/PAni can well be used as a low-cost surface adsorbent for removal of AB62 from aqueous media.<br> &nbsp;</div> SBA-15, Acid Blue 62, Polyaniline, Kinetic, Adsorption 17 34 http://jhs.mazums.ac.ir/browse.php?a_code=A-10-592-2&slc_lang=fa&sid=1 Iman Akbartabar 10031947532846004609 10031947532846004609 No Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran Mohammad Esmail Yazdanshenas 10031947532846004610 10031947532846004610 No 1. Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran Habib-Allah Tayebi tayebi_h@yahoo.com 10031947532846004611 10031947532846004611 No 2. Department of Textile Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Navid Nasirizadeh 10031947532846004612 10031947532846004612 Yes 1. Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran