We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
硫代氨基功能化粉煤灰空心微珠 @ 碳纳米管吸附 Cu<sup>2+</sup> 研究.
- Authors
王 柯; 张晓民; 张 良; 刘佳倩; 刘 冰; 王 壮; 马健翔
- Abstract
As one-dimensional nano-material with the advantages of high specific surface area and controllable structure, carbon nanotubes are widely used in the domain of adsorption, but restricted for application in heavy metal adsorption because of such disadvantages as high hydrophobicity, surface inertness and poor selective adsorption capability. With the spent fly ash cenospheres from coal combustion, the cenospheres@carbon nanotube materials with high density of defects were prepared and grafted with thiosemicarbazide functional groups on their surface by carboxylation and chlorination, and applied to the adsorption of Cu2+ in aqueous solution. The results show that the functional groups such as carboxyl, hydroxyl and amino groups were successfully introduced on the surface of fly ash cenospheres@carbon nanotubes, which makes the surface zeta potential drop. The adsorption capacity presented positive correlation with the reaction temperature, initial pH and initial concentration during the adsorption process. The adsorption lasted for 120 min reached the equilibrium, and the capacity of the composite material for absorbing Cu2+ at equilibrium was 34.0 mg/g. The adsorption process conformed to the Freundlich adsorption isotherm model and fitted well with the pseudo-secondary kinetic model and exhibited the spontaneous endothermic reaction. The adsorption mechanism includes ion exchange, electrostatic interactions and surface complexation. This research results can be provided for reference in the high-value utilization of fly ash and the adsorption of Cu2+ in aqueous solution.
- Subjects
FREUNDLICH isotherm equation; ENDOTHERMIC reactions; FLY ash; ADSORPTION capacity; CARBON nanotubes; COAL combustion
- Publication
Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong, 2023, Vol 52, Issue 9, p6
- ISSN
1008-7524
- Publication type
Article
- DOI
10.16283/j.cnki.hgkwyjg.2023.09.002