preconcentration of mercury II from natural water and milk sample by modified nano polyacrylonitrile fiber
سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,195
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شناسه ملی سند علمی:
NCNC01_012
تاریخ نمایه سازی: 14 شهریور 1392
چکیده مقاله:
A simple method has been developed for the preconcentration of mercury(II) based on the adsorption of its modified nano polyacrylonitrile fiber (PANF) complex . Modified nano polyacrylonitrile fiber (PANF) was prepared by adding of acrylic fibers to ethanolamine (MEA) with different concentration solutions.The stability of a chemically modified nanopolyacrylonitrile fiber especially in concentrated hydrochloric acid which was then used as a recyclingand pre-concentration reagent for further uses of Modified nano polyacrylonitrile fiber. The application of this Modified nano polyacrylonitrile fiber for sorption of a series of metal ions was performed by using different controlling factors such as the pH of metal ion solution and the equilibration shaking time by thestatic technique. Hg(II) was found to exhibit the highest affinity towards extraction by these Modified nano polyacrylonitrile fiber phases. The pronounced selectivity was also confirmed from the determined distribution coefficient (Kd) of all the metal ions, showing the highest value reported for mercury(II) tooccur by Modified nano polyacrylonitrile fiber. The potential applications of Modified nanopolyacrylonitrile fiber for selective extraction of mercury(II) to occur from aqueous solution weresuccessfully accomplished as well as pre- concentration of low concentration of Hg(II) (40 pg ml-1) fromnatural tap water and milk sample with a pre-concentration factor of 200 for Hg(II) off-line analysis bycold vapor atomic absorption analysis.The preconcentration factor attainable for quantitative recovery (>96%) of Hg(II) was 100 for a 1000mL sample volume
کلیدواژه ها:
نویسندگان
Ali MOGHIMI
Department of Chemistry, Varamin Pishva Branch . Islamic Azad University Varamin ,Iran
Majid ABDOUSS
Department of Chemistry, Amirkabir University of Technology, ,Tehran. Iran
Nima YARI
Department of Chemistry, Science and research Branch,Islamic Azad University Tehran ,Iran