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International Journal of Nanoscience and Nanotechnology (IJNN)، جلد ۷، شماره ۱، صفحات ۲۱-۲۷
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عنوان انگلیسی Application of Modified Nanoclay Sorbent for Separation and Preconcentration Trace Amount of Cobalt
چکیده انگلیسی مقاله The present article reports on the application of modified organo nanoclay as a green, easily prepared and stable solid sorbent for the preconcentration of trace cobalt ion in aqueous solution. The organo nanoclay was modified by adsorption of 5-(4-dimethyl amino-benzylidene) rhodanin reagent onto it. The sorption of Co2+ ions was quantitative in the pH range of 7.0 to 8.5, whereas quantitative desorption occurs instantaneously in 5.0 mL of 2.0 mol L-1 HNO3. The eluted solution was aspirated directly into the flame of atomic absorption spectrometry (FAAS). Linear range for determination of cobalt was maintained between 0.176 ng mL-1 to 15.0 μg mL-1 in initial solution. Relative standard deviation for ten replicated determination of 1.0 μg mL-1 of cobalt was ±2.34% . Detection limit was 0.1 ng mL-1 in initial solution (3Sbl, n=10) and preconcentration factor was 170. The sorption capacity of modified nanoclay for Co (II) was evaluated 0.56 mg per g of sorbent. The effects of the experimental parameters, including the sample pH, flow rates of sample and eluent solution, eluent type, breakthrough volume and interference ions were studied for preconcentration of Co2+. The proposed method was applied for determination of cobalt in water samples.
کلیدواژه‌های انگلیسی مقاله Nanoclay application,Cobalt determination,Preconcentration
نویسندگان مقاله d افضلی |
nanochemistry and environment department, research institute of environmental sciences, international center for science, high technology amp;amp; environmental sciences, kerman, i.r. iran

z بی نیاز |
chemistry department, shahid bahonar university of kerman, kerman, i.r. iran
سازمان اصلی تایید شده: دانشگاه شهید باهنر (Shahid bahonar university)

a مصطفوی |
chemistry department, shahid bahonar university of kerman, kerman, i.r. iran
سازمان اصلی تایید شده: دانشگاه شهید باهنر (Shahid bahonar university)

نشانی اینترنتی http://www.ijnnonline.net/article_3950_35b5855ba08dee12ae78686854df1233.pdf
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