Document Type : Original Article

Authors

1 MSc, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

2 Professor, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

3 Associate Professor, Department of Environmental Health Engineering, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran

4 Assistant Professor, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

Abstract

Background & Objective: With industrial development and population growth, the emerging contaminants enter into the natural water resources. Therefore, in this study Adsorption potential of NH4Cl-induced activated carbon (NAC) was investigated to remove antibiotic sulfanilamide from contaminated water.
Materials &Methods: The effect of operational conditions including solution pH, NAC concentration, sulfanilamide initial concentration and contact time were studied.
Results: NAC and SAC had specific surface area of 1029, 1024 and mean pore volume of 2.64, 2.23nm, respectively. With increasing the NAC concentration to 1 g/L, sulfanilamide adsorption efficiency increased to 84.4% within 40 min. Then the adsorption slightly increased with the increase in the contact time to 120 min and reached to its maximum adsorption of 99.2%. The maximum adsorption percentage of sulfanilamide onto SAC under similar conditions reached to 49.2%. The kinetics analysis showed that experimental adsorption data for both NAC and SAC were best fitted to the pseudo-second-order model. The maximum adsorption capacity of sulfanilamide onto NAC and SAC, calculated by the Langmuir model, was 238.1 and 87/7 mg/g, respectively.
Conclusion: Generally, these results showed that NAC was an efficient adsorbent with high removal efficiency for eliminating the antibiotics from the contaminated water streams

Keywords

Main Subjects

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