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Analytical and Bioanalytical Chemistry Research، جلد ۴، شماره ۱، صفحات ۰-۰
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Modification of CoFe2O4 Magnetic Nanoparticles by Dopamine and Ascorbic Acid as Anchors
چکیده انگلیسی مقاله CoFe2O4 magnetic nanoparticles were modified by dopamine (DA) and ascorbic acid (AA) as anchors. Separation of the DA and AA using CoFe2O4 magnetic nanoparticles have been studied by investigating the effects of pH, concentration of the DA and AA, amount of adsorbents, contact time, ionic strength and temperature. The mechanism of adsorption was also studied. The adsorption of DA and AA to the CoFe2O4 magnetic nanoparticles could be described by Langmuir-type adsorption isotherms. The effective surface area of the CoFe2O4 nanoparticles was 53.55 m2/g and 109.81 m2/g, respectively, for DA and AA. The maximum adsorption capacities were 28.98 and 72.99 mg of enediol per gram of adsorbent for DA and AA, respectively. With the help of adsorption isotherm, thermodynamic parameters such as free energy, enthalpy, and entropy have been calculated. The adsorption of DA onto CoFe2O4 is exothermic, but the temperature effect was negligible for adsorption of AA. On the basis of pseudo-first-order and pseudo-second-order kinetic equations different kinetic parameters have been obtained. DA and AA can be desorbed from the CoFe2O4 using concentrated imidazole as an eluent.
کلیدواژه‌های انگلیسی مقاله Magnetic nanoparticle, Adsorption, Dopamine, Ascorbic acid
نویسندگان مقاله مریم قایمی |
iranian national institute for oceanography and atmospheric science

قدرت اله آبسالان |
professor massoumi laboratory, department of chemistry, faculty of sciences, shiraz university, shiraz 71454, iran
سازمان اصلی تایید شده: دانشگاه شیراز (Shiraz university)

طیبه pourshamsi |
professor massoumi laboratory, department of chemistry, faculty of sciences, shiraz university, shiraz 71454, iran
سازمان اصلی تایید شده: دانشگاه شیراز (Shiraz university)

نشانی اینترنتی http://www.analchemres.org/article_44741_30ca73fe67cf863c3ee6e7cee3f64801.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/378/article-378-351423.pdf
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زبان مقاله منتشر شده en
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