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Turmeric Powder as a Natural Heavy Metal Chelating Agent: Surface Characterisation.
Author(s):
1. Amtul Qayoom: Department of Chemistry, NED University of Engineering and Technology, Karachi-75270, Pakistan
2. Syed Arif Kazmi: H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi- 75270, Pakistan
3. Saeeda Nadir Ali: Department of Chemistry, NED University of Engineering and Technology, Karachi-75270, Pakistan
Abstract:
The present study was conducted to investigate surface properties of turmeric in order to evaluate its detoxification potential and ability to sequester toxic metals ions. Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS), Infra-Red (IR) spectroscopy and potentiometric titrations were employed for characterisation of the surface of turmeric powder. Spectroscopic studies revealed that the surface of turmeric powder was porous mainly composed of polymeric -OH , -NH , -CH2 , -COO and -OH groups of polysaccharides. From potentiometric titrations and modelling of batch titration data, it was found that surface of the turmeric contains at least four binding sites with pKa values 3.56 (pK1), 4.83 (pK2), 7.68 (pK3) and 10.4 (pK4). Turmeric powder contains highest concentration of amino and hydroxyl groups for the pK4 values i.e., 0.55 mmol/ g. The total binding sites concentration for turmeric powder was 1.2 mmol/ g.
Page(s): 1-8
DOI: DOI not available
Published: Journal: Pakistan Journal of Scientific and Industrial Research (Series A: Physical Sciences), Volume: 60, Issue: 1, Year: 2017
Keywords:
Keywords are not available for this article.
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