Effect of fulvic acid on adsorptive removal of Cr(VI) and As(V) from groundwater by iron oxide-based adsorbents
Type
ArticleAuthors
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) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2015-05-15Online Publication Date
2015-05-15Print Publication Date
2015-06Permanent link to this record
http://hdl.handle.net/10754/564172
Metadata
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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/s11270-014-2193-5Sponsors
The authors thank the Netherlands Government for providing financial assistance through the Netherlands Fellowship Program under Grant No. 32000022.Publisher
Springer NatureJournal
Water, Air, & Soil Pollutionae974a485f413a2113503eed53cd6c53
10.1007/s11270-014-2193-5