Preconcentration of trace amounts of Pb(II) in Varamin waste water samples using modified Multiwall nano tube carbon
Subject Areas :Mohammd Yari 1 , Ali Moghimi 2 , Narges Behzad 3 , Elham Pournamdari 4
1 - دانشیار گروه شیمی ،دانشگاه آزاد اسلامی واحد اسلامشهر
2 - دانشیار گروه شیمی ،دانشگاه آزاد اسلامی واحد ورامین- پیشوا
3 - دانشجوی دکتری شیمی – فیزیک دانشگاه پیام نور واحد مشهد
4 - استادیارگروه شیمی ،دانشگاه آزاد اسلامی واحد اسلامشهر
Keywords: Functionalized, Multi Wall Carbon NanoTube carboxyl(MWCNT-COOH), Flame atomic absorption spectrometry(FAAS), Pb(II),
Abstract :
A simple, sensitive and selective method for exteraction of trace amounts of Pb(II) in water samples based on the adsorption of Multi Wall Carbon NanoTube carboxyl. A new methods technique using a disperse solid phase extraction (DSPE) with Multi Wall Carbon NanoTube carboxyl as sorbent was developed for the preconcentration of trace amounts of Pb(II) inVaramin waste water samples and was determined by flame atomic absorption spectrometry (FAAS). Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditions the limit of detection (LOD) and relative standard deviation were 0.070µg.L-1,0.562 µg.L-1 and 0.79% respectively. the proposed method has a good reproducibility 0.81% (RSD %).The enrichment factor was 200 and the percentage of recovery was in the range of 95-100% .The method was successfully applied to the recovery of Pb2+in different type of water samples. of Multi Wall Carbon NanoTube carboxyl in this study is full of potential to use as an excellent adsorbent in the extraction method like solid phase extraction(SPE) and solid phase micro extraction(SPME).
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