Removal of chromium (VI) from aqueous solution by adsorption using cousinia eryngioides boiss and activated carbon

Iranian Journal of Earth Sciences

مقاله 3، دوره 1، شماره 1، دی 2009، صفحه 35-43   

نوع مقاله: Original Research Paper

نویسندگان

M.T. Hamed Mosavian^{* 1}؛ I Khazaei²؛ M Aliabadi³

¹Ferdowsi University of Mashhad, Chemical Engineering Department

²Islamic Azad University, Ghouchan Branch

³Islamic Azad Univerisity, Birjand Branch

چکیده

Adsorption capacity of Cr (VI) onto cousinia eryngioides boiss, activated carbon was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH, temperature, agitation speed, absorbent dose and particle size. Cr (VI) removal is pH dependent and found to be maximum at pH 2.0. The amounts of Cr (VI) adsorbed increased with increase in dose of both adsorbents and their contact time. A contact time of 30 min was found to be optimum. Experimental results show low cost biosorbent were effective for the removal of pollutants from aqueous solution. The Langmuir, Freundlich and Temkin isotherm were used to describe the adsorption equilibrium studies of agrowaste. Freundlich isotherm shows better fit than Langmuir and Temkin isotherm in the temperature range studied.

کلیدواژه‌ها

Removal of chromium؛ Adsorption Isotherm؛ Low cost absorbent؛ waste water؛ chromium