شماره ركورد كنفرانس :
3550
عنوان مقاله :
Magnetic Fe3O4–chitosan nanoparticles as a new sorbent for removal of Carmoisine from aqueous solutions
پديدآورندگان :
Nasiri Khoshnevis Taher Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran , Sajedi-Amin Sanaz Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran , Salehi Roya Research Center for Pharmaceutical Nanotechnology and Faculty of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz , Naseri Abdolhossein a_naseri@tabrizu.ac.ir Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran,
كليدواژه :
Carmoisine , chitosan , STPP , dye removal , adsorption
عنوان كنفرانس :
بيست و پنجمين سمينار ملي شيمي تجزيه انجمن شيمي ايران
چكيده فارسي :
The current study aims at investigating the potential of magnetic chitosan nanoparticles (CS@Fe3O4) cross-linked by sodium tripolyphosphate (STPP) for the removal of Carmoisine from aqueous solutions. The prepared CS@Fe3O4 was further characterized upon their physicochemical properties using SEM, EDX, FT-IR, vibrating sample magnetometer (VSM) and Zeta potential.Magnetic nanoparticles (MNP) have been opened up an entirely new field of application according to their specific properties (non-toxicity, nano sizes, etc.) in environmental and biomedical sciences. In comparison with many other polymers, the chitosan backbone contains a number of free amine groups, which allow binding of many agents [1, 2]. Carmoisine, an acidic azo dye, was used as a model to investigate the adsorption properties of CS@Fe3O4 nanoparticle sorbent. Batch adsorption studies were carried out and the effect of experimental parameters such as pH, initial concentration, sorbent dosage, exposure time, and temperature on uptake of Carmoisine dye were investigated. Dye concentrations in the supernatant solutions were measured using a UV-Vis spectrophotometer. Complete removal was observed when a dye solution with the initial concentration of 50 mg.L-1 was treated by 8 mg of the used adsorbent at pH value of 4 at 298K. The adsorption of Carmoisine on studied MNP at different temperatures was studied as a function of contact time (5–40min) in order to determine the equilibrium time; experiments were conducted at 298, 303, and 313K in an isothermal water bath shaker with initial dye concentration of 40 mg/L. The results indicated that the contact time is needed for dye solution with initial concentration of 40 mg/L to reach equilibrium was 30 min. Carmosine adsorption isotherms carried out at 298K and equilibrium isotherm data were fitted to Langmuir and Freundlich equations and constants of isotherm equations were determined. Furthermore, pseudo-first and second-order kinetic models were also used to analyze adsorption kinetics [3].
