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:: Volume 16, Issue 4 (Winter 2015) ::
J Mil Med 2015, 16(4): 183-189 Back to browse issues page
Analytical Survey of the Kinetics and Thermodynamics of Phosphate Adsorption From Aqueous Solutions using Bone Charcoal
Mohammad Taghi Ghanian, Mohammad Tahghighi Haji Alizadeh, Ghader Ghanizadeh *, Mohammad Hasan Ehrampoush
Health Research Center, Baqiyatallah University of Medical Sciences, Tehran, Ira , qanizadeh@yahoo.com
Abstract:   (6712 Views)

Aims: Phosphorous (P) is one of the military wastewater pollutants which has a key role in water resource eutrophication. The aim of this study was to analyze the kinetics and thermodynamics of the P adsorption by using bone charcoal (BC).

Methods: BC was prepared in 400 °C and 2 h and pulverized via ASTM standard sieves in the range of 35-100 mesh. The structure of BC was analyzed using X-Ray Diffraction (XRD) and Scanning Electronic Microscopy (SEM). The concentration of P was analyzed by spectrophotometer methods. Analysis of data was performed with pseudo first -order and pseudo second -order kinetic models, Langmuir, Freundlich, Elovich and Dubinin-Radushkovich (D-R) models.

Results: The main component of BC is calcium hydroxyl apatite. The adsorption of P for the preliminary concentrations of 10 and 20 mg/l complies with the pseudo first- order kinetic model but for 50 and 100 mg/l complies with the pseudo second-order kinetic model. The energy of the adsorption reaction is 6.24 J/molºK which implies physical sorption. Based on the Langmuir model the adsorption capacity is 13.2 mg/g.

Conclusion: Based on the BC adsorption capacity for P removal, it can be said that this absorbent could be utilized for the elimination of phosphorous and similar pollutants from water and wastewater.

 

Keywords: Phosphate, Adsorption, Bone Charcoal, Kinetic and Thermodynamic of Adsorption
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Type of Study: Orginal Research | Subject: military medcine
Received: 2012/01/16 | Accepted: 2015/01/24 | Published: 2015/04/13
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Ghanian M T, Tahghighi Haji Alizadeh M, Ghanizadeh G, Ehrampoush M H. Analytical Survey of the Kinetics and Thermodynamics of Phosphate Adsorption From Aqueous Solutions using Bone Charcoal. J Mil Med. 2015; 16 (4) :183-189
URL: http://militarymedj.ir/article-1-954-en.html


Volume 16, Issue 4 (Winter 2015) Back to browse issues page
مجله طب‌نظامی Journal Mil Med
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