:: Volume 6, Issue 2 (Spring 2017) ::
Arch Hyg Sci 2017, 6(2): 214-220 Back to browse issues page
Synthesis and Application of Iron Oxide/Silica Gel Nanocomposite for Removal of Sulfur Dyes from Aqueous Solutions
Naser Tavassoli, Reza Ansari *, Zahra Mosayebzadeh
Department of Chemistry, School of Science, University of Guilan, Rasht, Iran
Abstract:   (2392 Views)

Background & Aims of the Study: water pollution by synthetic organic dyes is mainly regarded as environmental and ecological critical issues worldwide. In this research, magnetite iron oxide/silica gel nanocomposite (termed as Fe3O4/SG) was synthesized chemically and then used as an effective adsorbent for removal of sulfur dyes from aqueous solution.

Materials and Methods: The various parameters such as pH, sorbent dosage, initial dye concentration, contact time and dye solution temperature were investigated in a batch system. The equilibrium data were analyzed by Langmuir and Freundlich isotherm models.

Results: The experimental data fit well with pseudo-second-order kinetic model (R2≥0.998) and conformed better to Langmuir isotherm model (R2≥0.997). The maximum adsorption capacity for Fe3O4/SG obtained from the Langmuir model was 11.1mg/g. Evaluation of thermodynamic parameters proved that the adsorption process was normally feasible, spontaneous and exothermic.

Conclusion: It can be concluded that the Fe3O4/SG can be considered as a cost-effective and an environmental friendly adsorbent for efficient removal of sulfur dyes from aqueous solutions.

Keywords: Keywords: Adsorption, Fe3O4 coated silica, Sulfur dye, Isotherms
Full-Text [PDF 730 kb]   (1205 Downloads)    
Type of Study: Original Article | Subject: Environmental Health
Received: 2016/10/2 | Accepted: 2017/02/21 | Published: 2017/02/28



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Volume 6, Issue 2 (Spring 2017) Back to browse issues page