Evaluation of Removal Efficiency of Cr (VI) Ions from Aqueous Solution Using Chitosan

Journal of Chemical Health Risks

مقاله 4، دوره 5، شماره 1، اردیبهشت 2015   

شناسه دیجیتال (DOI): 10.22034/jchr.2018.544090

نویسندگان

Soheil Sobhanardakani^{* 1}؛ Raziyeh Zandipak²؛ Mohadeseh Bonyadi³؛ Hassan Parvizimosaed²؛ Mehran Moslemi⁴؛ Mahsa Tahergorabi Tahergorabi⁵؛ Seyed Mehdi Hosseini⁶

¹Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran

²Young Researchers & Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran

³Department of Fisheries, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

⁴Department of Fisheries, Jouybar Branch, Islamic Azad University, Jouybar, Iran

⁵School of Public Health, Kerman University of Medical Sciences, Kerman, Iran

⁶Department of the Environment, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran

چکیده

In this research, chitosan was used for the removal of Cr (VI) ions from aqueous solution. The effect of parameters like solution pH, initial Cr (VI) concentration, agitation time, amount of adsorbent and agitation speed on the adsorption process was studied. The experimental equilibrium data were analyzed by using various models such as Langmuir and Freundlich. Freundlich isotherm model fitted well with data. In addition, the experimental data was fitted to kinetic models including the pseudo-first-order and pseudo-second-order and based on calculated respective parameters such as rate constants, equilibrium adsorption capacities and correlation coefficients. The removal process follows the pseudo-second-order kinetic model. The results suggest that chitosan could be employed as a low-cost material for the removal of Cr(VI) ions from aqueous solutions.   

کلیدواژه‌ها

Cr (VI) ions Chitosan Adsorption Removal efficiency

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