期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 64, 期 -, 页码 79-88出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2016.03.041
关键词
Hydrothermal synthesis; Ammonium carbonate; Manganese carbonate; Mn2O3 nanostructures; Reactive Black 5 dye; Adsorption properties
资金
- Benha University, Egypt
Thermal decomposition of the hydrothermally prepared MnCO3 produced pure Mn2O3 nanoparticles with 23 nm crystallite size. The products were characterized and the adsorption properties of Mn2O3 adsorbent were investigated using Reactive Black 5 dye. Thence, some factors affecting the adsorption process were studied and the results exhibited good adsorption capacity (q(m) = 14.6 mg/g) of the adsorbent and the percent dye removal reached 92% in 40 min. Additionally, the kinetics, thermodynamics, and isotherms of the adsorption were investigated. The Langmuir model fitted the adsorption data. The adsorption process followed pseudo-second-order kinetic model. The adsorption of the dye on Mn2O3 adsorbent is an endothermic (Delta H degrees = 44.52 kJ/mol) and spontaneous (Delta G degrees = -21.63 kJ/mol) process. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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