اصلاح سطح کربن فعال گرانوله با روش تصفيه نهايي با هدف نيترات‌زدايي از آب آشاميدني
Journal Title: آب و فاضلاب - Year 2017, Vol 28, Issue 2
Abstract
Modification of Granular Activated Carbon with Post-Treatment to Enhance Nitrate Removal from Drinking Water The presence of nitrate in groundwater resources has instigated increasing concerns among both managers and users of, especially, drinking and sanitation water. From among the different nitrate removal methods, the adsorption method has attracted more attention thanks to its high removal efficieny and economical operation. Commercial activated carbon ranging in mesh size from 30‒40 was utilized to remove nitrate from an aqueous solution. In order to enhance nitrate uptake, different acid, alkaline, and cationic surfactant post-treatments were examined. Alkaline post-treatment followed by cationic surfactant modification was found to yield the best efficiency. FTIR, SEM, and N2 adsorption/desorption were carried out to determine the physical and chemical properties of activated carbon. Kinetic tests revealed that adsortption reached its equilibrium state after 12 hiurs and that the pseudo-second order and Freundlich models. Based on the Langmuir model, maximum adsorption capacity was found to be 15.34 and pH had an insignificant effect on nitrate adsorption. Moreover, the highest decline in nitrate adsorption was observed in the presence of sulfate followed by chloride, phosphate, and carbonate. Based on the results obtained, the modified activated carbon accompanied by washing with sodiuym hydroxide and modified cationic surfactant post-treatment might be recommended for use in adsorption processes as a promising innovative technology for nitrate removal from drinking water.
Authors and Affiliations
Mahmoud Mazarji, Mohammad Sabouhi, Behnoosh Aminzadeh, Majid Baghdadi
Keywords
Related Articles
- EP ID EP178956
- DOI 10.22093/wwj.2017.16227
- Views 107
- Downloads 0
ارزيابي تجارت آب مجازي در بخش صنعت استان زنجان
Evaluation of Virtual Water Trade in the Industrial Sector of Zanjan Province Abstract Water crisis is of utmost importance due to the growing demand and consumption of water, especially in developing countries where...
استفاده از نانوذرات آهن در سنتز هيدروژل مهره‌هاي مغناطيسي جهت حذف رنگزاي بازيک آبي 159 از محيط‌هاي آبي Iron Nanoparticles (Fe3O4) Used to Synthesize Magnetic Sodium Alginate Hydrogel Beads for the Removal of Basic Blue 159 from Aqueous Solutions
Iron Nanoparticles (Fe3O4) Used to Synthesize Magnetic Sodium Alginate Hydrogel Beads for the Removal of Basic Blue 159 from Aqueous Solutions A. Ghajarieh1, Kh. Farizadeh2, M. Hosseinkhani2 1. MSc in Textile Chemistry...
بررسي مقايسه‌اي شاخص‌هاي کيفيت آب درياچه سد شهيد رجايي(استان مازندران-ساري)
Comparative Study of Water Quality Indices in Shahid Rajaee Dam Reservoir (Sari, Mazandarn Province) Dam reservoirs are commonly used for a variety of purposes including flood control; supplying drinking, irrigation, and...
بررسی کارايی فرايند اکسيداسيون پيشرفتهH2O2/ZnO در حذف آنتی‌بيوتيک سفترياکسون از محيط‌های آبی Efficiency of Advanced H2O2/ZnO Oxidation Process in Ceftriaxone Antibiotic Removal from Aqueous Solutions
Efficiency of Advanced H2O2/ZnO Oxidation Process in Ceftriaxone Antibiotic Removal from Aqueous Solutions Abstract A major concern about pharmaceutical pollution is the presence of antibiotics in water resources throu...
سازه‌هاي تئوري رفتار برنامه‌ريزي شده و صرفه‌جويي در مصرف آب Applicability of Theory of Planned Behavior for Predicting Water Conservation Behaviors among College Students
Applicability of Theory of Planned Behavior for Predicting Water Conservation Behaviors among College Students Abstract Noticing drought crisis in Iran and importance of water conservation and recognizing its determin...