پديدآورندگان :
Foroutan Rauf Polymer Research laboratory, Department of Organic and Biochemistry, faculty of chemistry, university of Tabriz, Tabriz, Iran, , Mohammadi Reza r.mohammadi@tabrizu.ac.ir Polymer Research laboratory, Department of Organic and Biochemistry, faculty of chemistry, university of Tabriz, Tabriz, Iran;
چكيده فارسي :
Colors are one of the most important sources of contamination for water and the environment and their products may be poisonous and carcinogenic to living organisms. It is estimated that synthetic paints are produced annually of about 10,000 tons, and it is estimated that around 1-10% of this amount is evacuated within the environment. Colors are used in various industries such as textiles, paper making, plastics, food, rubber and cosmetics, and they enter the environment through sewage [1]. Colors are generally divided into three categories: (1) anionic (include direct, acid and reactive dyes); (2) cationic (all basic dyes) and (3) non-ionic (disperse dyes and vat dyes). In general, colors are stable over the light, heat, and oxidants and are non-biodegraded. Colors can cause major problems within the environment, because some of them are poisonous, carcinogenic and mutagenic, allergic, cause irritation and gene change in humans[2].Various physical and chemical methods have been employed for the treatment of dyes, including coagulation, flocculation, precipitation, ozonation, oxidation, photocatalysis, and ultrasound irradiation. Among various methods of dye removal, adsorption has been reported to be the most effective method that provides promising results. Among the adsorbent materials, one of the most extensively explored adsorbents is activated carbon. In recent years, spinel ferrite nanoparticles have received considerable attention due to their ease of separation under external magnetic fields and large surface area to volume ratio. Among the spinel ferrite compounds, much efforts has been undertaken to synthesis of cobalt ferrite (CoFe2O4), because of its chemical stability, high mechanical hardness, high magneto crystalline anisotropy (k 105 J/m3), and coercivity. Although, its application as an adsorbent material is not yet much explored, recently CoFe2O4 have been used in water purification[3]. In the present work, activated carbon was obtained from apricot leaves and was used to formation of activated carbon/CoFe2O4 nanocomposite. The magnetic composite was used as an adsorbent for the removal of methylene blue dye. As the activated carbon was derived from a natural source it presents an economic and environmental friendly source. Also, the CoFe2O4 nanoparticles help the activated carbon /CoFe2O4 nanocomposite to be easily separated using magnetic fields and shows a cleaning way to dispose the waste. The effect of different parameters such as initial pH and contact time was studied. The results showed that with increasing contact time and initial pH, the removal efficiency of methylene blue from aqueous solution increased.
