Nanospherical inorganic α-Fe core-organic shell necklaces for the removal of arsenic(V) and chromium(VI) from aqueous solution

Theodor Bilharz Research Institute

Bibliographic Information

Authors: Azzam A.M.; Shenashen M.A.; Selim M.M.; Yamaguchi H.; El-Sewify I.M.; Kawada S.; Alhamid A.A.; El-Safty S.A.

Journal: Journal of Physics and Chemistry of Solids

Publisher: Elsevier Ltd

Publication Date: October 2017

Volume / Issue: Volume 109

Pages: 78–88

ISSN: 223697

DOI: 10.1016/j.jpcs.2017.05.017

Scopus: View on Scopus

Document Type: Article

Authors and Affiliations

Azzam A.M., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan, Environmental Research Department, Teodor Bilharz Research Institute, Cairo, 12411, Egypt; Shenashen M.A., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan; Selim M.M., Department of Mathematics, Al-Aflaj College of Science and Human Studies, Prince Sattam Bin Abdulaziz University, Al-Aflaj, 710-11912, Saudi Arabia; Yamaguchi H., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan; El-Sewify I.M., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan; Kawada S., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan; Alhamid A.A., Prince Sattam Bin Abdulaziz University, P. O. Box 173, Al-Kharj, 11942, Saudi Arabia, Civil Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; El-Safty S.A., National Institute for Materials Science (NIMS), Research Center for Functional Materials, 1-2-1 Sengen, Tsukuba-shi, 305-0047, Ibaraki-ken, Japan

Abstract

Mesoporous nanospherical necklaces (NSN) of inorganic α-Fe core-organic shell and ethylenediaminetetraacetic acid (EDTA) were fabricated. The necklaces were 1 μm in length and 50 nm in thickness, with massive nanospherical particles connecting and overlapping in a neat micro-/nano-necklace archery cage for capturing/trapping of As(V) and Cr(VI) species from water sources. The α-Fe core and the dressing shell of EDTA provided numerous active sites for adsorption, which led to 100% adsorption uptake of these toxic ions. The adsorption isotherms revealed that NSN adsorbent with mesoporous caves and organic-decorated surfaces was promising and effective for the spontaneous and endothermic removal of both ions from contaminated water. The NSN structure exhibited long-term stability. The adsorption efficiency and uptake of the deleterious arsenic and chromium species were achieved after multi-particulate processing of reuse cycles. The pH-dependent removal of As(V) and Cr(VI) species is an emerging topic in selective adsorption assays among competitive ions. Furthermore, the ion-selective conditions at pH 5 for As(V) and pH 7 for Cr(VI) significantly affected the adsorption capacity and affinity of 306.7 and 406.5 mg g−1 into NSN cages, respectively. The obtained results could be used as a basis to provide effective and low-cost products for the purification of wastewater resources from toxic metals. © 2017 Elsevier Ltd

Keywords

As(V) species; Core-shell; Cr(VI) species; Nanospherical; Necklace; Removal; Arsenic; Chemicals removal (water treatment); Chromium; Chromium compounds; Ethylenediaminetetraacetic acid; Ions; Shells (structures); Solutions; Water pollution; Adsorption capacities; Adsorption efficiency; Core shell; Long term stability; Particulate processing; Selective adsorption; Adsorption

Citation Information

Scopus Citations: 61

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