Inorganic-organic mesoporous hybrid segregators for selective and sensitive extraction of precious elements from urban mining.

Autor: Gomaa H; National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba, Ibaraki 305- 6 0047, Japan; Chemistry Department, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt., Shenashen MA; National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba, Ibaraki 305- 6 0047, Japan; Petrochemical Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727 Cairo, Egypt., Elbaz A; Environmental Engineering Department, Faculty of Engineering, Zagazig University, Egypt., Kawada S; National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba, Ibaraki 305- 6 0047, Japan., Seaf El-Nasr TA; Chemistry Department, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt., Cheira MF; Nuclear Materials Authority, P.O. Box 530 El Maadi, Cairo, Egypt., Eid AI; Advanced Materials Division, Central Metallurgical R&D Institute, Helwan, Egypt., El-Safty SA; National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba, Ibaraki 305- 6 0047, Japan. Electronic address: sherif.elsafty@nims.go.jp.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2021 Dec 15; Vol. 604, pp. 61-79. Date of Electronic Publication: 2021 Jul 03.
DOI: 10.1016/j.jcis.2021.07.002
Abstrakt: This study aimed to develop a highly selective extraction protocol for gold (Au III ) ions from electronic urban waste (EUW) using simple, low-cost Inorganic-organic mesoporous hybrid segregators. The unique features of mesoporous hybrid segregator architectures are of particular to ensure effective adsorption system in terms of selective and sensitive recovery of Au III ions from EUW. The segregator platform featured 3D micrometric, mesocage double-serrated plant-leaf-like γ-Al 2 O 3 sheets with hierarchy surfaces containing tri-modal mesopores interiorly and uniformly arranged toothed edges of ~20-40 and ~15 nm groove width and depth at the exterior surfaces, respectively. Rational incorporation of actively organic chelates into hierarchical γ-Al 2 O 3 sheet platforms leads to the production of a couple of selective segregators 1 and 2 (namely, SC1 and SC2) for Au III ions at specific conditions by applying batch and fixed-bed columnar techniques. The mesocage SC segregators offer a selective extraction approach of Au III ions from mixed element contents released from a computer motherboard (CMB). Our finding indicated that the textural and hierarchal features of the mesocage SC segregators played key roles in the selective adsorption/recovery of Au III ions at pH 2-2.5 with high capacity (136-141 mg/g range) and effective reusability ≫10 consecutive cycles. In general, the developed SCs could be utilized as a real extractor of Au III recovery from spent CMBs.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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