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    Detection of trace amount of arsenic in groundwater by laser-induced breakdown spectroscopy and adsorption

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    Date
    2014
    Publisher
    © 2014 Optics and Laser Technology
    Author
    Haider, A F M Yusuf
    Ullah, M. Hedayet
    Khan, Zulfiqar H
    Kabir, Firoza
    Abedin, Kazi Monowar
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/10361/8018
    Citation
    Haider, A. F. M. Y., Hedayet Ullah, M., Khan, Z. H., Kabir, F., & Abedin, K. M. (2014). Detection of trace amount of arsenic in groundwater by laser-induced breakdown spectroscopy and adsorption. Optics and Laser Technology, 56, 299-303. doi:10.1016/j.optlastec.2013.09.002
    Abstract
    LIBS technique coupled with adsorption has been applied for the efficient detection of arsenic in liquid. Several adsorbents like tea leaves, bamboo slice, charcoal and zinc oxide have been used to enable sensitive detection of arsenic presence in water using LIBS. Among these, zinc oxide and charcoal show the better results. The detection limits for arsenic in water were 1 ppm and 8 ppm, respectively, when ZnO and charcoal were used as adsorbents of arsenic. To date, the determination of 1 ppm of As in water is the lowest concentration of detected arsenic in water by the LIBS technique. The detection limit of As was lowered to even less than 100 ppb by a combination of LIBS technique, adsorption by ZnO and concentration enhancement technique. Using the combination of these three techniques the ultimate concentration of arsenic was found to be 0.083 ppm (83 ppb) for arsenic polluted water collected from a tube-well of Farajikandi union (longitude 90.64, latitude 23.338 north) of Matlab Upozila of Chandpur district in Bangladesh. This result compares fairly well with the finding of arsenic concentration of 0.078 ppm in the sample by the AAS technique at the Bangladesh Council of Scientific and Industrial Research (BCSIR) lab. Such a low detection limit (1 ppm) of trace elements in liquid matrix has significantly enhanced the scope of LIBS as an analytical tool.
    Keywords
    Adsorbent; Arsenic; ZnO
     
    Description
    This article was published in the Journal Optics and Laser Technology [© 2013 Elsevier Ltd.] and the definite version is available at : 10.1016/j.optlastec.2013.09.002
    Publisher Link
    http://www.sciencedirect.com/science/article/pii/S0030399213003277
    Department
    Department of Mathematics and Natural Sciences, BRAC University
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