Haloxylon Activated Carbon; a Novel Absorbent to Remove Phenol from Aqueous Solutions

Document Type : Original Article

Authors

1 Environmental Health Engineering Department, Public Health School, Kashan University of Medical Sciences, Kashan, Iran

2 Biostatistics & Public Health Department, Health Faculty, Kashan University of Medical Sciences, Kashan, Iran

3 Institute of Nanoscience & Nanotechnology Department, University of Kashan, Kashan, Iran

Abstract

Aims Even low concentrations of phenol in industrial waste can cause many difficulties for the
aquatic environment. So removal of this organic matter is an important issue. the adsorption
process, is one of the most effective methods for isolation and purification of Phenols. The
aim of this study was to introduce wood haloxylon as a natural and new absorbent to remove
phenol from aqueous solutions.
Instrument & Methods Experiments were carried out in laboratory scale to evaluate the
effect of important variables such as initial pH (4, 5, 6, 7, 8 and 9), the initial concentration
of phenol (100, 50 and 150mg/l), adsorbent dosage (0.5, 1 and 2g/l) and reaction time (20,
40 and 60min). The concentration of phenol was measured by the photometric method at
wavelengths of 500nm.
Findings The highest efficiency was recorded at pH=7 and at a rate of 45.2% and after it the
removal efficiency dropped. The maximum adsorption of phenol happened in the first 20
minutes (35.8%) and after that, it was absorbed more slowly and took 60 minutes (45.2%)
to reach the equilibrium. By increasing the concentration of phenol from 50 to 150mg/l, the
removal of phenol reduced from 45.2 to 30.6% and the absorptive capacity increased of from
1.1 to 2.3mg/g. By increasing the adsorbent dosage from 0.5 to 2g/l, the removal of phenol
increased from 19.1 to 45.2% and the absorptive capacity decreased from 1.9 to 1.1mg/g.
Conclusion HTAC, in optimum conditions, can be used for pre-treatment of aqueous solution
containing phenol.

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