سال انتشار: ۱۳۹۳

محل انتشار: پنجمین کنگره بین المللی نانو و فناوری نانو (ICNN2014)

تعداد صفحات: ۴

نویسنده(ها):

N Nozad – Water & Wastewater Company of East Azerbaijan, Tabriz, Iran
A Babaei – Water & Wastewater Company of East Azerbaijan, Tabriz, Iran

چکیده:

Zero-valent iron nanoparticle (NZVI) technology is becoming an increasingly popular choice for treatmentof hazardous and toxic wastes and remediation of contaminated sites. NZVI tends to accumulate and adhere to naturematerials like soil. In this project chitosan is used in order to prevent accumulation and higher their efficiencies. Chitosan-Fe0 (CTO-Fe0) nano particles are prepared by NaBH4 reduction method. Characteristics of synthesized nanoparticleswere studied through TEM, FT-IR and XRD analysis. Mean crystallite size of nanoparticles is calculated using Debye-Sherrer formula and was approximately equal to 23 nm. Acid red 14 (AR14) was used as a model pollutant in order tostudy water pollutants decolorization efficiency of CTO-Fe0 nanoparticles. The kinetic data were analyzed using thepseudo-first-order and pseudo-second-order adsorption kinetic models. According to these models, the rate constantswere calculated for different initial dye concentrations, pH and initial CTO-Fe0 concentrations. It can be concluded thatthe experimental data are well defined with pseudo-second-order kinetic model. Predicted values of rate constants werefound to be in good agreement with experimental values (R2=0.987).