Paper Information

Journal:   JOURNAL OF ADVANCES IN ENVIRONMENTAL HEALTH RESEARCH   2017 , Volume 5 , Number 3; Page(s) 172 To 182.
 
Paper: 

THE EFFICIENCY OF MODIFIED POWDERED ACTIVATED CARBON FOR REMOVAL OF AMMONIA NITROGEN FROM AQUEOUS SOLUTION: A PROCESS OPTIMIZATION USING RSM (RESPONSE SURFACE METHODOLOGY), ADSORPTION ISOTHERM AND KINETIC STUDY

 
 
Author(s):  GODINI HATAM, DARGAHI ABDOLLAH, TABANDEH LEILA, MOHAMMADI MITRA, VAZIRI YASER, AHAGH MIR MOHAMMAD HOSEINI, SHARAFI KIOMARS, JALILIAN ZAHRA*
 
* DEPARTMENT OF ENVIRONMENTAL HEALTH ENGINEERING, SCHOOL OF PUBLIC HEALTH, SOCIAL DEVELOPMENT AND HEALTH PROMOTION RESEARCH CENTER, KERMANSHAH UNIVERSITY OF MEDICAL SCIENCES, KERMANSHAH, IRAN
 
Abstract: 

The objective of this study was to determine the performance of modified commercial powdered activated carbon (MCPAC) in removal of ammonia from aqueous solution. The effects of adsorbent dosage (0.5–1.5 g/L), ammonia concentration (100–200 mg/L), pH (3 to 9) and contact time (2 to 120 min) were examined. In this study, experiments were performed based on Response Surface Methodology (RSM). The adsorption isotherm was evaluated using Freundlich and Langmuir models. Kinetics study was analyzed using pseudo first order, pseudo second order and particle penetration kinetic models. By increasing adsorbent dosage, pH and contact time, the removal efficiency increased. According to CCD results, the MCPAC was fitted to a quadratic equation. Also, ammonia adsorption for MCPAC followed the Langmuir (R2=0.9831) isotherm model. The maximum adsorption capacity for MCPAC was 40.323 mg/g. The analysis of adsorption kinetic for MCPAC indicated that ammonia adsorption was well fitted by the pseudo second order kinetic model. As thus, we concluded that MCPAC could be considered as an appropriate and economical alternative adsorbent for water and wastewater treatment due to its high ammonia adsorption capacity.

 
Keyword(s): MODIFIED ACTIVATED CARBON, AMMONIA, RSM, AQUEOUS SOLUTION, ADSORPTION ISOTHERM
 
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