Volume 7, Number 3 (5-2014)                   ijhe 2014, 7(3): 399-412 | Back to browse issues page


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Kakavandi B, Mokhtari M, Rezaee Kalantari R, Ahmadi E, Rastkari N, Fatehi M et al . Synthesis and efficiency evaluation of magnetic nanocomposite of activated carbon- zero valent iron/silver (PAC-Feº/Ag) in phenol removal from aqueous solution. ijhe. 2014; 7 (3) :399-412
URL: http://ijhe.tums.ac.ir/article-1-5118-en.html

1- Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
2- Department of Environmental Health, School of Public Health, Shahid Sadoughi University of Medical Sciences,Yazd,Iran.
3- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences,Tehran, Iran.
4- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
5- Center for Air Pollution Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran.
6- BSc of Environmental Health Engineering, HSE manager in setup and operation Company of Tesco, Tehran, Iran.
7- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. , Ali_azari67@yahoo.com
Abstract:   (3417 Views)

Background and Objectives: Phenol is one of priority pollutants produced through leather, paint, resin, and pharmaceutical industries and it can contaminate groundwater after entering to the environment. Hence, it is necessary to use a suitable method for its removal. The aim of this study was synthesize and efficiency evaluation of magnetic nanocomposite of activated carbon powder-zero valent iron/silver (PAC-Feo/Ag) in the removal of phenol from aqueous solution. Material & Methods: Reduction method was used for converting bivalent iron to zero valent iron and co-precipitation method for depositing of iron on activated carbon. For coating silver on nano zero valent iron, rapid mixing at high temperature was used. The adsorbent was characterized using SEM, TEM, and XRD techniques. Then, the impact of pH, contact time, agitation speed, temperature, adsorbent, and initial phenol concentration were evaluated and optimized by one factor at the time method. Reaction kinetics and isotherms were also determined. Results: It was found that PAC-Feo/Ag has cubic and intertwined structure and has a diameter in the range from 40 to 100 nm. The optimum conditions for phenol removal by PAC-Feo/Ag were as pH=3, 90 min contact time, 200 rpm agitating speed and adsorbent concentration equal to 1 g/l. Isotherm and kinetic equations showed that the experimental data of phenol adsorption onto PAC-Feo/Ag are correlated to the Langmuir (R2>0.969) and pseudo-second order (R2<0.965) models, respectively. Conclusion: Under optimum conditions, modified adsorbent by zero valent iron and silver with maximum efficiency of 97% has quickly and effectively ability in removal of phenol and it can be easily separated from the solution sample by magnet because of its magnetic properties.

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Type of Study: Research | Subject: WATER
Received: 2013/12/11 | Accepted: 2015/05/25 | Published: 2015/05/25

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