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:: Volume 2, Issue 4 (winter 2017) ::
3 2017, 2(4): 259-271 Back to browse issues page
Efficiency of Powder Activated Carbon Modified by Sulfuric Acid, Sodium Nitrate and Potassium Permanganate to Remove Ammonia Nitrogen from Aqueous Environment
H Godini , Gh Shams Khorramabadi , A Dargahi , M Mohammadi , Z Jalilian
Alborz University of Medical Sciences
Abstract:   (139 Views)
Background & Objectives: Water resources pollution to ammonia nitrogen from agricultural and industrial activities has caused several environmental problems. Therefore, it is necessary to reduce or remove this contaminant from water resources. The aim of this study was to determine the efficiency of activated carbon modified by sulfuric acid, sodium nitrate and potassium permanganate to remove ammonia nitrogen from water solution.
Methods: This experimental study was performed on a laboratory scale in a batch system. The effects of absorbent dose (0.5- 1.5 g), the initial concentration of ammonia nitrogen (100-200 mg/l), pH (3-9) and contact time (2-120 min) on system efficiency were evaluated using the response level. Freundlich and Langmuir surface adsorption were applied to assess adsorption isotherms. First order removal reaction, pseudo-second order, and particle penetration kinetics were also evaluated.
Results: The results showed that ammonia nitrogen removal efficiency increases with increasing adsorbent dose, pH, and contact time and decreased with increasing initial concentration of ammonia nitrogen. Based on central composite design, the modified absorbent fits quadratic equation. Ammonia nitrogen adsorption followed Langmuir model (R2=0.9831) and the maximum absorption capacity of 40.3 mg/g was achieved. Ammonia nitrogen absorbance kinetics was best described by pseudo-second order model (R2=0.997).
Conclusion: Considering the high adsorption capacity, modified activated carbon powder can be used as an appropriate adsorbent in water and wastewater treatment.
Keywords: Adsorption, Modified Activated Carbon, Ammonia Nitrogen, Aqueous Environment.
Full-Text [PDF 409 kb]   (137 Downloads)    
Type of Study: Research | Subject: General
Received: 2017/08/22 | Accepted: 2017/08/22 | Published: 2017/08/22
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Godini H, Shams Khorramabadi G, Dargahi A, Mohammadi M, Jalilian Z. Efficiency of Powder Activated Carbon Modified by Sulfuric Acid, Sodium Nitrate and Potassium Permanganate to Remove Ammonia Nitrogen from Aqueous Environment. 3. 2017; 2 (4) :259-271
URL: http://oeh.arums.ac.ir/article-1-106-en.html
Volume 2, Issue 4 (winter 2017) Back to browse issues page
فصلنامه سلامت محیط و کار Occupational and Environmental Health
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