Abstract
Mercury adsorption of silver containing silica-based nanocomposites was evaluated. Maximum adsorption capacity of 0.4 mmol g−1 was achieved at silver loading of 0.5 mmol g−1. Nevertheless, if to calculate in respect to silver content the mercury adsorption capacity was generally elevated along with decreasing silver nanoparticle diameter. It has been demonstrated that silver particle diameters and loading should collectively be taken into consideration in designing the optimal mercury removal process. Further recommendations have been proposed with the aim of increasing the mercury removal efficiency using silver nanoparticles deposited on the surface of silica with lover silver loading, while achieving similar or even higher efficiencies due to observed hyperstoichiometry effect.
Highlights
Mercury and its compounds are persistent, highly bio-accumulative in to people and the environment [1] originates from natural and anthropogenic processes into environment in elemental, organic and inorganic forms [2]
Further recommendations have been proposed with the aim of increasing the mercury removal efficiency using silver nanoparticles deposited on the surface of silica with lover silver loading, while achieving similar or even higher efficiencies due to observed hyperstoichiometry effect
This work demonstrated that the mercury adsorption characteristics of the silver decorated silica sample were influenced significantly by the size of silver nanoparticles
Summary
Mercury and its compounds are persistent, highly bio-accumulative in to people and the environment [1] originates from natural and anthropogenic processes into environment in elemental, organic and inorganic forms [2]. They are classified as one of 13 priority hazardous substances (PHS) in accordance with the Water Framework Directive (WFD) and its daughter directives as for example the Environmental Quality Standards Directive (EQSD) which has been adopted recently [3, 4].
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