REMOVAL OF IRON FROM AQUEOUS SOLUTION BY RICE HUSK:  ISOTHERM AND KINETIC STUDY

Monik Kasman; Shaliza Ibrahim; Salmariza Salmariza

doi:10.24960/jli.v2i2.601.63-70

REMOVAL OF IRON FROM AQUEOUS SOLUTION BY RICE HUSK: ISOTHERM AND KINETIC STUDY

Monik Kasman, Shaliza Ibrahim, Salmariza Salmariza

Abstract

This work was focused on iron adsorption by rice husk. The use of rice husk for the removal of iron from aqueous solution at different contact time, pH, adsorbent doses and initial iron concentration was investigated. This study was also aimed to recognize the mechanisms that govern iron removal, and to find an appropriate isotherm and kinetic model in batch process. The equilibrium adsorption isotherms have been analyzed by Freundlich and Langmuir model. The pseudo-first, and pseudo-second order kinetic models have been used to investigate the mechanism of adsorption and potential rate controlling steps. The equilibrium data fitted well to Freundlich model and mechanism of adsorption described well to pseudo first order kinetic. The iron adsorption process was highly dependent on pH, dosage and initial concentration dependent. Iron was reduced higher with decrease in iron concentration and increase in rice husk dosage. The suitable contact time for iron removal was found to be 180 minutes.

ABSTRAK

Fokus penelitian ini adalah adsorpsi besi dengan menggunakan adsorban sekam padi. Eksperimen dilakukan dengan memvariasikan waktu kontak, nilai pH, dosis adsorban dan konsentrasi awal besi. Penelitian bertujuan untuk mengamati mekanisme yang mempengaruhi penyisihan besi dan menemukan model isothermal dan kinetika yang tepat untuk proses adsorpsi besi. Kesetimbangan model isotermal dianalisis dengan model
Freundlich dan Langmuir. Model kinetika order pertama dan kedua digunakan untuk mengamati mekanisme adsorpsi dan tahap kontrol kecepatan potensial. Hasil penelitian menunjukan bahwa model adsorpsi yang tepat untuk penyisihan besi adalah model Freundlich dan mekanisme adsorpsi yang sesuai adalah kinetika orde pertama. Proses
adsorpsi besi sangat dipengaruhi oleh pH, dosis adsorban dan konsentrasi awal besi. Persentase penyisihan besi meningkat jika konsentrasi awal besi menurun dan dosis adsorban meningkat. Hasil penelitian menunjukan bahwa adsorpsi besi terjadi dengan baik
pada waktu kontak sekurang-kurangnya 180 menit.

Keywords

adsorption; iron; rice husk; isotherm; kinetic

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References

Ajmal M., Khan Rao R.A., Anwar S., J. Ahmad, R. Ahmad. 2003. Adsorption studies on rice husk: removal and recovery of Cd(II) from wastewater, Bioresource Technology 86: 147–149.

Akhtar, M.M.I. Bhanger, S. Iqbal and Hasany S.M. 2006. Sorption potential of rice husk for the removal of 2,4-dichlorepheno from aqueous solutions: Kinetic and thermodynamic investigations, Journal of Hazardous Materials B128: 44–52.

Bazrafshan E., Mahvi A. H., Nasseri S., Mesdaghinia A. R., Vaezi F., Nazmara Sh. 2006. Removal of Cadmium from Industrial Effluents By Electrocoagulation Process Using Iron Electrodes. Iran. J. Environ. Health Sci. Eng 3 (4): 261-266.

Berbenni P., Pollice A., Canziani R., Stabile L. and Nobili F. 2000. Removal of iron and manganese from hydrocarbon-contaminated Ground waters, Bioresource Technology 74 109–114.

Feng, Q. Ling, G. Fuzhong, S. Sugita M. Shoya and Masami. 2004. Adsorption of lead and mercury by rice husk ash, Journal of Colloid and Interface Science 278: 1–8.

IRRI (International Rice Research Institute). 2010. Rice husk. Rice Knowledge Bank, article retrieved at April 25, 2010 from http://www.knowledgebank.irri.org/rkb/index.php/rice-milling/byproducts-and-their-utilization/rice-husk

Kasman M. & Ibrahim S., 2010. Adsorption of iron(II) from aqueous solution by sodium hydroxide rice husk : response surface methodology and isotherm study. Proceeding of International Conference on Environmental Science and Technology. Bangkok, Thailand.

Kumar U., and Bandyopadhyay M. 2006. Fixed Bed Column Study for Cd (II) Removal From Wastewater Using Treated Rice Husk. Journal of Hazardous Waste Materials B129 253 – 259.

Kurniawan T.A., Chan G.Y.S., W.H., Babel S.. 2006. Low Physicochemical treatment techniques for wastewater laden with heavy metals. Chem. Eng. Journal 118: 83–98.

Mahvi A.H., Alavi N. and Maleki A. 2005. Application of Rice Husk and Its Ash in Cadmium Removal from Aqueous Solution. Pakistan Journal of Biological Sciences 8 (5): 721 – 725.

Metcalf & Eddy. 2003. Wastewater Engineering: Treatment and Reuse. McGraw-Hill Higher Education. New York, USA.

Okoniewska E., Lach J., Kacprzak M., and Neczaj E. 2007. The removal of manganese, iron and ammonium nitrogen on impregnated activated carbon. Desalination 206: 251–258.

Oztas N.A., Karabakan A., Topal O. 2008. Removal of Fe(III) ion from aqueous solution by adsorption on raw and treated clinoptilolite. Microporous and Mesoporous Materials 111: 200–205.

Sag.Y & Y. Aktay.2002. Kinetic studies on sorption of Cr (VI) and Cu (II) ions by chitin, chitosan dan Rhizopus arrhizus. Biochemical Engineering Journal 12: 143–153.

Vadivelan, V., & Kumar, K. V. 2005. Equilibrium, kinetics, mechanism, and process design for the sorption of methylene blue onto rice husk. Journal of Colloid and Interface Science, 286, 90 - 100.

Yeddou, and A. Bensmaili. 2007. Equilibrium and kinetic modeling of iron adsorption by eggshells in a batch system: effect of temperature. Desalination 206: 127–134.

DOI: http://dx.doi.org/10.24960/jli.v2i2.601.63-70