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In this study the removal of Cr (VI) from synthetic wastewater was investigated using Acroptilon repens (Russian Knapweed) flower powder under various conditions (pH, contact time and initial concentration of Cr). The capacity of chromium adsorption at equilibrium conditions by this biosorbent was increased by adsorbate concentration. The results also showed that the removal efficiency of Cr (VI) was increased by increasing the contact time. By increasing the initial concentration of Cr (VI) solution, chromium removal was reduced. The suitability of adsorbents and their constants was tested or evaluated with the Langmuir, Freundlich and Temkin isotherms models. The results indicated that the Freundlich and Langmuir models (R2 > 0.99) gave a better concordance to the adsorption data in comparison with the Temkin equation (R2 = 0.97). The adsorption of Cr (VI) followed the pseudo-second-order kinetics (R2 = 0.991). The study showed that Acroptilon repens flower powder can be used as an effective lignocellulosic biomaterial and biosorbent for the removal of Cr (VI) from wastewater.
Czasopismo
Rocznik
Tom
Strony
40--47
Opis fizyczny
Bibliogr. 38 poz., rys. tab., wykr.
Twórcy
autor
- Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
autor
- Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
autor
- Department of Environmental Engineering, Yazd University, Yazd, Iran
autor
- Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
autor
- Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Bibliografia
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- 21. Khan, M.A., Ahmad, M., Zafar, M., Sultana, S., Marwat, S.K., Shaheen, S., Leghari, M.K., Jan, G., Ahmad, F. & Nazir, A. (2011). Medico-botanical and chemical standardization of pharmaceutically important plant of Tricholepis chaetolepis (Boiss) Rech, J. Med. Plant Res. 5(8) 1471-1477.
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- 31. Foo, K. & Hameed, B. (2010). Insights into the modeling of adsorption isotherm systems, Chem. Eng. J. 156, 2-10.
- 32. Zhang, H., Tang, Y., Cai, D., Liu, X., Wang, X., Huang, Q. & Yu, Z. (2010). Hexavalent chromium removal from aqueous solution by algal bloom residue derived activated carbon: Equilibrium and kinetic studies, J. Hazard Mater. 181, 801-808.
- 33. Zubair, A., Bhatti, H.N., Hanif, M.A. & Shafqat, F. (2008). Kinetic and equilibrium modeling for Cr (III) and Cr (VI) removal from aqueous solutions by Citrus reticulata waste biomass, Water Air Soil Pollut. 191, 305-318.
- 34. Anandkumar, J. & Mandal, B. (2011). Adsorption of chromium (VI) and Rhodamine B by surface modified tannery waste: Kinetic, mechanistic and thermodynamic studies, J. Hazard Mater. 186, 1088-1096.
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- 38. Thamilarasu, P., Kumar, G.Vijaya, Tamilarasan, R., Sivakumar, V. & Karunakaran, K. (2011). Kinetic, Equilibrium and Thermodynamic studies on the removal of Cr (VI) by activated carbon prepared from Cajanus Cajan(L) Milsp seed shell, Pol. J. Chem. Tech. 13, 1-7. DOI: 10.2478/v100 26-011-0041-6.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-43df6113-3b44-4505-abdd-2b298b745a39