Enhancing the Hg(II) Removal Efficiency from Real Wastewater by Novel Thymine-Grafted Reduced Graphene Oxide Complexes
| Autor: | Fang Deng, Lin Ding, Lingling Liu, Renfei Kang, Xubiao Luo, Xing Wu |
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| Rok vydání: | 2016 |
| Předmět: |
Graphene
General Chemical Engineering Inorganic chemistry Kinetics Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Grafting 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences law.invention Thymine chemistry.chemical_compound Adsorption chemistry law Functional group 0210 nano-technology Selectivity |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:6845-6853 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | In this study, the reduced graphene oxide was modified by grafting thymine on its surface. The resultant reduced graphene oxide-thymine composite (rGO-Thy) exhibits a higher Hg(II) adsorption capacity and selectivity compared with rGO as the functional group of thymine shows a strong affinity toward Hg(II) and forms the thymine-Hg(II)-thymine complex. The relative selectivity coefficients of rGO-Thy for Hg(II)/Pb(II), Hg (II)/Ni(II), Hg (II)/Co(II), Hg (II)/Cu(II), and Hg(II)/Cd(II) are 21.72, 7.08, 5.37, 4.37, and 10.51, respectively. This is mainly attributed to the thymine-specific binding with Hg(II). In addition, the adsorption capacity of rGO-Thy for Hg(II) is almost 2 times higher than reduced graphene oxide (rGO). Kinetics studies indicate that the adsorption process fits well with the pseudo-second-order model, and the adsorption kinetic constant is 0.02 g·mg–1·min–1. Moreover, the practical application of rGO-Thy achieves almost 100% removal efficiency, and the treatment volumes of actual indust... |
| Databáze: | OpenAIRE |
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