DETERMINATION OF THERMODYNAMIC AND KINETIC PARAMETERS DURING SORPTION OF PHOSPHOROUS BY WEAKLY ANION EXCHANGER

Removal of phosphorous for control of eutrophication in receiving water is necessary and of great concern for environmental protection. In this work, weak anion exchange resin with OH was used for removal of phosphorous from model solution. All experiments were conducted in a batch system. Various parameters such as pH, initial phosphorous concentration, solution temperature, resin dosage and reaction time were studied. High removal was observed at pH 5. After 150 minute reaction time at pH 5 and 0.5 g/L of adsorbent, phosphorous concentration decreased form initial concentrations of 5, 10 and 15 mg/L to below 0.8 mg/L. Experimental data was best fitted onto pseudo-second order model. In addition it was found that film diffusion model is the main rate controlling step in this reaction. Thermodynamic studies demonstrated that removal of phosphorous is an exothermic reaction and randomness in solid-liquid surface during sorption process. Keyword: Adsorption, Phosphorous, Eutrophication , Thermodynamic. ۱ ناريا ،نادمه يکشزپ مولع هاگشناد ،تشادهب هدکشناد ،طيحم تشادهب يسدنهم هورگ رايشناد ۲ هب يسدنهم هورگ داتسا ناريا ،نادمه يکشزپ مولع هاگشناد ،تشادهب هدکشناد ،طيحم تشاد ۳ ،جرـك ،زرـبلا يکشزپ مولع هاگشناد ،تشادهب هدکشناد ،طيحم تشادهب يسدنهم هورگ رايشناد ناريا ۴ ،جرـك ،زرـبلا يکـشزپ موـلع هاگشناد يملع تيئه وضع ،طيحم تشادهب يسدنهم هورگ يبرم (لوئسم هدنسيون) ناريا ۰۹۱۲۶۹۵۲۳۰۲ mansor62@gmail.com ۵ ناريا ،نادمه يکشزپ مولع هاگشناد ،تشادهب هدکشناد ،طيحم تشادهب سانشراک 1. Assoc. Prof. of Environmental Health Eng., Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran 2. Prof. of Environmental Health Eng., Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran 3. Assoc. Prof. of Environmental Health Eng., Faculty of Public Health, Alborz University of Medical Sciences, Karaj, Iran 4. Instructor of Environmental Health Eng., Alborz University of Medical Sciences, Karaj, Iran (Corresponding Authors) (+98) 9126952302 mansor62@gmail.com 5. B.S. of Environmental Health, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran