Application of agricultural waste products for removal of phenol in aqueous systems


Afshin Maleki 1 , * , Amir Hossein Mahvi 2

1 Instructor Department of Environmental Health, Kordistan University of Medical Sciences, Sanandaj, Iran.

2 Assistant Professor Department of Environmental Health, Tehran University of Medical Sciences, Tehran, Iran.

How to Cite: Maleki A, Mahvi A H. Application of agricultural waste products for removal of phenol in aqueous systems, Hormozgan Med J. 2007 ; 10(4):e90206.


Hormozgan Medical Journal: 10 (4); e90206
Published Online: August 16, 2006
Article Type: Research Article
Received: May 31, 2005
Accepted: August 16, 2006




Introduction: Using agricultural waste products (rice husk and rice husk ash) as
a cheap, modern, available and mass-produced adsorber for phenol from aqueous
solution was studied. Adsorption in this way seems more economical in
comparison with other conventional methods (which are usually costly).
Methods: In this descriptive-analytic survey, batch kinetics and isotherm studies
were according to various experimental dose and aqueous solution pH.
Adsorption equilibrium of rice husk and rice husk ash was reached within 6 hours
for phenol concentration of 150-500 μg/L and 3 hours for phenol concentration of
500-1300 μg/L, respectively.
Results: Findings show that aqueous solution pH is an important factor in phenol
adsorption. The adsorption of phenol decreases with increasing pH of the
solution. Increasing primary phenol concentration, increases adsorber adsorption
capacity while phenol adsorption efficiency shows an inverse trend
simultaneously. Isotherm studies revealed that the equilibrium pattern both
adsorber systems well foloww the Freundlich model.
Conclusion: In reality, results show that rice husk ash is much more effective
(98%) than rice husk (44.5%) for phenol removal. Therefore, rice husk ash can
be used as an efficient and cheap adsorber for removal of organic pollutants (such
as phenol) from water and wastewater.


Phenol - Adsorption – Agriculture – Waste Product

© 2007, Hormozgan Medical Journal. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License ( which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.



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