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application of oxazolone azo dye modified alumina as new sorbent for separation of palladium from anodic slime and wastewater samples
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نویسنده
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sabermahani fatemeh ,paykani tayebeh ,fozooni samieh
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منبع
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iranian journal of analytical chemistry - 2015 - دوره : 2 - شماره : 1 - صفحه:7 -13
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چکیده
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In the present work, a new kind of alumina-based adsorbent with high selectivity and stability and efficient adsorption was prepared. alumina was coated with an oxazolone azo dye, 2-(4-{2-[4-(dimethylamino) phenyl]-1-diazenyl}phenyl)-4-[1-phenyl methylidene]-5(4h)-oxazolone, and then used for preconcentration of trace amounts of palladium. the analytical procedure involved the complex formation of pd with oxazolone azo dye as a chelating agent in buffer media of ph 5. the stability of sorbent was excellent and adsorption capacity did not change significantly after 100 consecutive uses of 50.0 mg of modified alumina. under the optimum conditions, the preconcentration factor of the method was 150. the linearity was maintained in the concentration range of 0.33 ng ml-1 to 8.0 mg ml-1 in the original solution. for 2.0 µg ml-1 of pd, the relative standard deviation 1.4% and detection limit 0.25 ng ml-1 was obtained. the proposed method was successfully applied to the determination of trace amounts of palladium in the anodic slime and wastewater samples.
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کلیدواژه
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modified alumina ,oxazolone azo dye ,palladium ,wastewater
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آدرس
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payame noor university, department of chemistry, ایران, payame noor university, department of chemistry, ایران, shahid bahonar university, zarand high education center, mining engineering department, ایران
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کاربرد آلومینای اصلاح شده با رنگ آزوی اکسازولونی بعنوان یک جاذب جدید برای جداسازی پالادیم از نمونه های لجن آندی
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Authors
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صابرماهانی فاطمه ,پیکانی طیبه ,فزونی سامیه
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Abstract
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در کار حاضر، یک نوع جدید از جاذب بر پایه آلومینا، با انتخاب پذیری بالا و پایداری خوب و جذب موثر تهیه گردید. آلومینا با رنگ اکسازولونی 2(4{2 [4(دی متیل آمینو) فنیل] 1دی آزنیل} فنیل) 4[1فنیل متیلیدین] 5 (H4 )اکسازولون پوشیده شده و سپس برای پیش تغلیظ مقادیر کم پالادیم بکار رفت.
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Keywords
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