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    Effect of fulvic acid on adsorptive removal of Cr(VI) and As(V) from groundwater by iron oxide-based adsorbents

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    Type
    Article
    Authors
    Uwamariya, V.
    Uwamariya, V.
    Petrusevski, B.
    Slokar, Y. M.
    Aubry, Cyril
    Lens, P. N L
    Amy, Gary L.
    Amy, Gary L.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2015-05-15
    Online Publication Date
    2015-05-15
    Print Publication Date
    2015-06
    Permanent link to this record
    http://hdl.handle.net/10754/564172
    
    Metadata
    Show full item record
    Abstract
    Abstract Natural contamination has become a challenging problem in drinking water production due to metal contamination of groundwater throughout the world, and arsenic and chromium are well-known toxic elements. In this study, iron oxide-coated sand (IOCS) and granular ferric hydroxide (GFH) were used to study the effects of fulvic acid (FA) on the adsorptive removal of Cr(VI) and As(V) from synthetic groundwater. IOCS and GFH were characterized by SEM/EDS, and experiments were performed at different pH levels (6, 7, and 8). The surface of IOCS and GFH showed a high content of Fe and O (75 and 60 % of the atomic composition, respectively), suggesting that they can highly effectively adsorb Cr(VI) and As(V). Adsorption tests with the simultaneous presence of As(V) and FA, on the one hand, and Cr(VI) with FA, on the other hand, revealed that the role of FA on chromate and arsenate adsorption was insignificant at almost all pH values investigated with both adsorbents. A small influence as a result of FA was only observed for the removal of As(V) by IOCS at pH 6 with a decrease of 13 and 23 % when 2 and 5 mg/l were added to the synthetic water, respectively. It was also found that organic matter (OM) was leached from the IOCS during batch adsorption experiments. The use of FEEM revealed that humic-like, fulvic-like, and protein-like organic matter fractions are present on the IOCS surface. © 2015 Springer International Publishing Switzerland.
    Citation
    Uwamariya, V., Petrusevski, B., Slokar, Y. M., Aubry, C., Lens, P. N. L., & Amy, G. L. (2015). Effect of Fulvic Acid on Adsorptive Removal of Cr(VI) and As(V) from Groundwater by Iron Oxide-Based Adsorbents. Water, Air, & Soil Pollution, 226(6). doi:10.1007/s11270-014-2193-5
    Sponsors
    The authors thank the Netherlands Government for providing financial assistance through the Netherlands Fellowship Program under Grant No. 32000022.
    Publisher
    Springer Nature
    Journal
    Water, Air, & Soil Pollution
    DOI
    10.1007/s11270-014-2193-5
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11270-014-2193-5
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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