Kinetic studies on bioadsorption of arsenate fromaqueous solutions using chitosan
عنوان مقاله: Kinetic studies on bioadsorption of arsenate fromaqueous solutions using chitosan
شناسه ملی مقاله: JR_JAEHR-2-1_003
منتشر شده در شماره 1 دوره 2 فصل در سال 1393
شناسه ملی مقاله: JR_JAEHR-2-1_003
منتشر شده در شماره 1 دوره 2 فصل در سال 1393
مشخصات نویسندگان مقاله:
Nematollah Jaafarzadeh - Department of Environmental Health Engineering AND Environmental Technology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Nezamaddin Mengelizadeh - Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Afshin Takdastan - Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Mehrnush Haji-Amadi - Department of Philosophy, Tehran Branch, Islamic Azad University, Tehran, Iran
خلاصه مقاله:
Nematollah Jaafarzadeh - Department of Environmental Health Engineering AND Environmental Technology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Nezamaddin Mengelizadeh - Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Afshin Takdastan - Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Mehrnush Haji-Amadi - Department of Philosophy, Tehran Branch, Islamic Azad University, Tehran, Iran
Arsenic, one of the most toxic and dangerous elements in the environment affecting millions of people around the world, is associated with several diseases. In this pilot study, we investigated removal of arsenate from aqueous solutions using chitosan under the influences of initial arsenic ion concentrations, pH, contact time, and adsorbent dosages of chitosan. In order to assess the sorption mechanism and the potential rate of controlling steps, the pseudo-first and pseudo-second order kinetic models and the Langmuir and Freundlich isotherm models were used. The obtained results showed that the removal of As(V) by chitosan was found to be pH dependent, with optimum sorption occurring at pH = 4. The kinetics of arsenate adsorption on chitosan is well described by the pseudo-second order model. Furthermore, As (V) sorption isotherm was developed at optimal conditions and sorption equilibrium data were fitted to the Freundlich isotherm model
کلمات کلیدی: Adsorption, As (V), Chitosan, Kinetic Models
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/753772/