Extraction and Separation of Trace Amounts Lead (П) in Water Samples Using Nano Polyacrylonitril Modified Ethylendiamins

Abstract

A simple, sensitive and selective method for extraction of trace amounts of Pb (II) in water samples based on the adsorption of its modification nano polyacrylonitrile fiber (PANF) was examined in this study. PANF was prepared by adding acrylic fibers to ethylendiamin (EDA) with different concentration solutions. A new technique using a solid phase extraction (SPE) cartridge with modified PANF as sorbent was developed for the preconcentration of trace amounts of lead and was determined by flame atomic absorption spectrometry (FAAS). Ethylenediamine plays a key role as chelating reagent on ultrahigh specific surface of PANF. 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 limit of quantification (LOQ) were 0.167, 0.562 and 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. PANF and its derivate such as PANF-EDA in this study are full of potential to use as an excellent adsorbent in
the extraction method like SPE and solid phase micro extraction (SPME).