Arsenic Removal from Aqueous Solutions Using Modified and Unmodified Oak Sawdust

Document Type : Research Paper

Authors

1 Prof. of Environmental Health Engineering, Health Sciences Research Center, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan

2 MSc Gradute of Environmental Health Engineering, Hamadan University of Medical Scieences, Hamadan

Abstract

In this research, oak sawdust, in both modified and unmodified forms, was used as an economical and low-cost material for the removal of arsenic from aqueous solutions. For this purpose, arsenic synthetic samples were prepared using NaAsO2 in distilled water and the effects of pH, adsorbent dosage, contact time, and initial As(V) concentration were investigated on As(V) adsorption using the adsorbents prepared. The results showed that modified sawdust achieved the highest efficiency (>91%) over a contact time of 60 min and at pH 7 when the adsorbent dosage was 4gr/L and the initial As(V) concentration was 150 µg/L. The data from both adsorbents fitted well to the Langmuir isotherm. Under optimum conditions (an initial As(V) concentration of 150 µg/L and optimal absorption pH, contact time, and adsorbent dosage), maximum As(V) removal efficiencies were 93.85% and 91.034% with the modified  and unmodified sawdust adsorbents, respectively. Given the availability and low cost of the adsorbent used and the high removal efficiency obtained at  lower adsorbent dosages and contact times, the modified oak sawdust may be recommended as an effective adsorbent for the removal of arsenic (v) from aqueous solutions, especially since it requires no need for pH modification.

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References

  1. 1. Li, J., Xia, W., Zhou, J., Li, J., li, W., and Xiao, X. (2011). “Adsorption behavior of As (III) from aqueous solutions on ferric hydroxide.” Energy Procedia, 11, 3436-3440.

    2. Awual, M. R., Shenashen, M. A., Yaita, T., Shiwaku, H., and Jyo, A. (2012). “Efficient arsenic (V) removal from water by ligand exchange fibrous adsorbent.” Water Research, 46(17), 5541-5550.

    3. Ergican, E., and Gecol, H. (2008). “Nonlinear two-phase equilibrium model for the binding of arsenic anions to cationic micelle.” J. of Membrane Science, 325(1), 69-80.

    4. Gecol, H., Gecol, E., and Fuchs, A. (2004). “Molecular level separation of arsenic (V) from water using cationic surfactant micelles and ultrafiltration membrane.” J. of Membrane Science, 24(1),105-119.

    5. Lim, J. W., Chang, Y. Y., Yang, J. K., and Lee, S. M. (2009). “Adsorption of arsenic on the reused sanding wastes calcined at different temperatures.” Colloids and Surfaces A: Physicochemical and Engineering Aspects, 345(1-3), 65-70.

    6. Chandrasekaran, V. R. M., Muthaiyan, I., Huang, P. C., and Liu, M. Y. (2010). “Using iron precipitants to remove arsenic from water: Is it safe?.” Water Research, 44(19), 5823-5827.

    7. Kord Mostafapour, F., Bazrafshan, E., Farzadkia, M., and Amini, S. (2013). “Arsenic removal from aqueous Solutions by Salvadora Persica Stem Ash.” J. of Chemistry, 740847, 1-8.

    8. Gholami, M., Mohammadi, H., and Mokhrtari, S. (2009). “Application of reverse osmosis technology for arsenic removal from drinking water.” ZUMS Journal, 17 (68), 9-20. (In Persian)

    9. Asgari, A., Mahvi, A.H., Vaezi, F., and Khalili, F. (2008). “Study of the efficiency of Arsenic removal from drinking water by granular ferric hydroxide (GFH).” J. of Qom University of Medical Sciences,2(1), 54-62. (In Persian)

    10. Rehman Khan, S., Inayat, A., and Rana, A. (2010). “Sorption of reactive and acid dyes from aqueous solutions onto sawdust.” Bangladesh Journal of Scientific and Industrial Research, 45(1), 35-38.

    11. Rahmini, A., Samadi, M. T., Gheyamli, M., Motaghipour, H., and Mirzaei, S. (2009). “Comparison of performance of three type of sawdust in Hamadan city of a low cost adsorbent for arsenic and syanid removal from wastewater.” 12th Conf. of Environmenal Health, Isfahan University of Medical Sciences, Isfahan. (In Persian)

    12. Urik, M., Littera, P., Sevc, J., Kolencik, M., and Cernansky, S. (2009). “Removal of arsenic (V) from aqueous using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies.” International Journal of Environmental Science and Technology, 6(3), 451-456.

    13. Malkoc, E., nad Nuhoglu, Y. (2007). “Determination of kinetic and equilibrium parameters of the batch adsorption of Cr(VI) onto waste acorn of Quercus ithaburensis.” Chemical Engineering and Processing, 46(10), 1020-1029.

    14. Argun, M. E., Dursun, S., Ozdemir, C., and Karatas., M. (2007). “Heavy metal adsorption by modified oak sawdust: Thermodynamics and kinetics.” J. of Hazardous Materials, 141, 77-85.

    15. Srivastava, S., Raj, K. R., and Kardam, A. (2013). “Efficient arsenic depollution in water using modified maize powder.” Environmental Chemistry Letters, 11(1), 47-53.

    16. Nabi, G. H., and Fazelipishe, H. (1998). “Adsorption of heavy metals by sawdust.” J. of Environmental Studies, 24, 15-22.

    17. Osman, H. E., Badwy, R. K., and Ahmad, H. F. (2010). “Usage of some agricultural by-prodocts in the removal of some heavy metals from industrial wastewater.” J. of Phytology, 2(3), 51-62.

    18. APHA, AWWA, WEF. (2005). Standard methods for the examination of water and wastewater, 21st Ed., American Public Health Association, USA.

    19. Moradi, O., Yari, M., and Zare, K. (2010). “Structural effects on the interactions of Pb(II) ion with modified banana shell and banana shell during adsorption from aqueous solution.” J. of Physical and Theoretical Chemistry, 7(2), 83-90.

    20. Maleki, A., and Eslami, A. (2011). “Isotherm and kinetics of arsenic (v) adsorption from aqueous solution using modified wheat straw.” IJHE, 3 (4), 439-450. (In Persian)

    21. Abbad, B., Lounis, A., and Djilali, T. (2012). “Adsorption of methylene blue from aqueous solution on the surface of Znapso-34 nanoporous material.” World Academy of Science, Engineering and Technology, 71, 1664-1668.

    22. Abdel-Ghani, N. T., Hefny, M., and El-Chaghaby, G. A. F. (2007). “Removal of lead from aqueous solution usinglow cost abundantly available adsorbents.” Int. J. Environ. Sci. Tech., 4(1), 67-73.

    23. Man, H. C., Chin, W. H., Rahmatizadeh, M., and MohdYusof, M. (2012). “Adsorption potential of unmodified rice husk for boron removal.” Bioresources, 7(3), 3810-3822.

    1. Samarghandi, M.R., Azizian, S., and Shirzad Siboni, M. (2009). “Rremoval of hexavalent chromium from aqueous solution by modified holly sawdust: A Study of equilibrium and kinetics.” Scientific J. of Hamadan University of Medical Sciences, 16 (4), 61-67. (In Persian)

    25. Mehrasbi, M. R., and Farahmandkia, Z. (2008). “Heavy metal removal from aqueous solution by adsorption on modified banana shell.” IJHE, 1 (1), 57-66. (In Persian)

    26. Igwe, J. C., and Abia, A. A. (2007). “Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob.” Eclet. Quím., 32(1), 33-42.

    27. Jiang, M. Q., Wang, Q. P., Jin, X. Y., and Chen, Z. L. (2009). “Removal of Pb (II) from aqueous solution using modified and unmodified kaolinite clay.” J. of  Hazardous Materials, 170(1), 332-339.

Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 26, Issue 6 - Serial Number 6
Serial no.: 100
January and February 2016
Pages 42-49

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