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Mercury Removal From Aqueous Solutions With Chitosan-Coated Magnetite Nanoparticles Optimized Using the Box-Behnken Design
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نویسنده
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Rahbar Nadereh ,Jahangiri Alireza ,Boumi Shahin ,Khodayar Mohammad Javad
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منبع
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Jundishapur Journal Of Natural Pharmaceutical Products - 2014 - دوره : 9 - شماره : 2 - صفحه:1 -7
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چکیده
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Background: nowadays,removal of heavy metals from the environment is an important problem due to their toxicity. objectives: in this study,a modified method was used to synthesize chitosan-coated magnetite nanoparticles (ccmn) to be used as a low cost and nontoxic adsorbent. ccmn was then employed to remove hg2++ from water solutions. materials and methods: to remove the highest percentage of mercury ions,the box-behnken model of response surface methodology (rsm) was applied to simultaneously optimize all parameters affecting the adsorption process. studied parameters of the process were ph (5-8),initial metal concentration (2-8 mg/l),and the amount of damped adsorbent (0.25-0.75 g). a second-order mathematical model was developed using regression analysis of experimental data obtained from 15 batch runs. results: the optimal conditions predicted by the model were ph = 5,initial concentration of mercury ions = 6.2 mg/l,and the amount of damped adsorbent = 0.67 g. confirmatory testing was performed and the maximum percentage of hg2++ removed was found to be 99.91%. kinetic studies of the adsorption process specified the efficiency of the pseudo second-order kinetic model. the adsorption isotherm was well-fitted to both the langmuir and freundlich models. conclusions: ccmn as an excellent adsorbent could remove the mercury ions from water solutions at low and moderate concentrations,which is the usual amount found in environment. © 2014,school of pharmacy,ahvaz jundishapur university of medical sciences.
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کلیدواژه
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Chitosan; Magnetite Nanoparticles; Mercury
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آدرس
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Ahvaz Jundishapur University Of Medical Sciences, Nanotechnology Research Center,School Of Pharmacy, Department Of Medicinal Chemistry, ایران, Ahvaz Jundishapur University Of Medical Sciences, Nanotechnology Research Center,School Of Pharmacy, Department Of Medicinal Chemistry, ایران, Ahvaz Jundishapur University Of Medical Sciences, School Of Pharmacy, Department Of Medicinal Chemistry, ایران, Ahvaz Jundishapur University Of Medical Sciences, Toxicology Research Center,School Of Pharmacy, Department Of Pharmacology And Toxicology, ایران
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Authors
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