Synthesis and Application of Iron Oxide/Silica Gel Nanocomposite for Removal of Sulfur Dyes fromAqueous Solutions
محل انتشار: مجله آرشیو علوم بهداشتی، دوره: 6، شماره: 2
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 422
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شناسه ملی سند علمی:
JR_AHS-6-2_014
تاریخ نمایه سازی: 19 آبان 1397
چکیده مقاله:
Background & Aims of the Study: water pollution by synthetic organic dyes is mainlyregarded as environmental and ecological critical issues worldwide. In this research, magnetiteiron oxide/silica gel nanocomposite (termed as Fe3O4/SG) was synthesized chemically and thenused as an effective adsorbent for removal of sulfur dyes from aqueous solution.Materials and Methods: The various parameters such as pH, sorbent dosage, initial dyeconcentration, 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) andconformed better to Langmuir isotherm model (R2≥0.997). The maximum adsorption capacityfor Fe3O4/SG obtained from the Langmuir model was 11.1mg/g. Evaluation of thermodynamicparameters proved that the adsorption process was normally feasible, spontaneous andexothermic.Conclusion: It can be concluded that the Fe3O4/SG can be considered as a cost-effective and anenvironmental friendly adsorbent for efficient removal of sulfur dyes from aqueous solutions
کلیدواژه ها:
AdsorptionFe3O4 coated silicaSulfur dyeIsothermIran
نویسندگان
Naser Tavassoli
Department of Chemistry, School of Science, University of Guilan, Rasht, Iran
Reza Ansari
Department of Chemistry, School of Science, University of Guilan, Rasht, Iran
Zahra Mosayebzadeh
Department of Chemistry, School of Science, University of Guilan, Rasht, Iran