Abstract
In this work, a novel silver nanoparticles-doped synthetic sodalitic composite was synthesized and characterized using advanced characterization methods, namely TEM-EDS, XRD, SEM, XRF, BET, zeta potential, and particle size analysis. The synthesized nanocomposite was used for the removal of Hg2+ from 10 ppm aqueous solutions of initial pH equal to 2. The results showed that the sodalitic nanocomposites removed up to 98.65% of Hg2+, which is ∼16% and 70% higher than the removal achieved by sodalite and parent coal fly ash, respectively. The findings revealed that the Hg2+ removal mechanism is a multifaceted mechanism that predominantly involves adsorption, precipitation and Hg-Ag amalgamation. The study of the anions effect (Cl−, NO3−, C2H3O2−, and SO42−) indicated that the Hg2+ uptake is comparatively higher when Cl− anions co-exist with Hg2+ in the solution.
Original language | English |
---|---|
Pages (from-to) | 951-959 |
Number of pages | 9 |
Journal | Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering |
Volume | 54 |
Issue number | 9 |
DOIs | |
Publication status | Published - 29 Jul 2019 |
Funding
This research work was carried out with financial support of Nazarbayev University Research Council in the framework of project entitled “Hyperstoichiometry Activity in Metal Nanoparticle Interaction” (Project SOE2015009).
Keywords
- coal fly ash
- mercury removal
- nanocomposites
- silver nanoparticles
- synthetic sodalite
- water treatment