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Media type:
E-Article
Title:
Carbon microspheres decorated with iron sulfide nanoparticles for mercury(II) removal from water
Contributor:
Pasinszki, Tibor;
Krebsz, Melinda;
Chand, Deepak;
Kótai, László;
Homonnay, Zoltán;
Sajó, István E.;
Váczi, Tamás
Published:
Springer Science and Business Media LLC, 2020
Published in:
Journal of Materials Science, 55 (2020) 4, Seite 1425-1435
Language:
English
DOI:
10.1007/s10853-019-04032-3
ISSN:
0022-2461;
1573-4803
Origination:
Footnote:
Description:
AbstractA new and simple method is developed to synthesize carbon microspheres decorated with iron sulfide nanoparticles for mercury ion removal from water. The synthesis is based on carbonizing polystyrene–divinylbenzene-based and iron(III) sulfate-loaded cation exchange resins between 500 and 1000 °C. The phase composition, surface area, and morphology of these materials are characterized by various spectroscopic and diffraction techniques, including Mössbauer spectroscopy, powder X-ray diffraction, Raman and scanning electron microscopy, and BET analysis. Pyrrhotite is found to be the dominant iron-containing phase. The adsorption performance of microspheres for mercury ion removal from water is studied as a function of adsorbent load and contact time at pH 6.5 using a solution of 40 mg dm−3mercury ion. Pyrrhotite nanoparticles played a key role in mercury ion removal amounting to 70–90% of the extracted amount. A high adsorption capacity of 104 mg of mercury/g of adsorbent at an adsorbent load of 0.33 g dm−3is achieved, and the removal kinetics could be well fitted with a pseudo-second-order kinetic model, indicating chemical sorption. The synthetic method is easy to scale up for large-scale production and materials are easy to handle, which is significant for large-scale environmental applications.