Synthesis of biosourced silica-Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions
Azat, Seitkhan and Arkhangelsky, Elizabeth and Papathanasiou, Thanasis and Zorpas, Antonis A. and Abirov, Askar and Inglezakis, Vassilis J. (2020) Synthesis of biosourced silica-Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions. Comptes Rendus Chimie, 23 (1). pp. 77-92. ISSN 1631-0748 (https://doi.org/10.5802/crchim.19)
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Abstract
This paper focuses on the synthesis of a new silver nanocomposite adsorbent derived from rice husk as raw material. The synthesis is based on triethoxysilane chemistry and the reduction of silver without the aid of reductant chemicals. The derived AgNPs@SiO2 nanocomposites are fully characterized and then used for the removal of mercury (II) from aqueous solutions. The results demonstrated that the affinity of the composite for mercury is high and the removal mechanism is adsorption accompanied by a redox reaction between mercury and silver followed by the formation of calomel and amalgams between silver and mercury. The silver-mercury reaction is complex, and its stoichiometry seems to scale with the silver content. Besides the importance of the surface reactions, the successful implementation of biosourced silica for mercury removal from water is useful for the development of strategies for the valorization of agricultural waste and boosts the concept of circular economy and bioeconomy.
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Item type: Article ID code: 73502 Dates: DateEvent6 May 2020Published26 November 2019AcceptedSubjects: Science > Chemistry Department: Faculty of Engineering > Chemical and Process Engineering Depositing user: Pure Administrator Date deposited: 06 Aug 2020 15:03 Last modified: 18 Jun 2024 01:27 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/73502