科研之友
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摘要
Eosin Y is a kind of organic dye which is difficult to degrade, and it has a harmful effect on water quality. In this work, the removal efficiency of Eosin Y from aqueous solutions by the spent activated carbon (AC) which is regenerated via microwave heating has been systematically investigated. The structure and properties of spent AC and regenerated AC were characterized by N-2 adsorption isotherms, scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy and gas chromatography-mass spectrometry. The related dominant factors including contact time, pH, temperature, initial concentration and ionic strength were considered, and these effects on the removal of Eosin Y were studied in batch experiments. Additionally, based on the best fit rule, kinetic and isotherm studies indicated that the experimental data were in line with the theoretical values predicted by the pseudo-second-order model and the Langmuir adsorption isotherm model, respectively. The maximum adsorption capacity of Eosin Y was 344.83 mg/g, indicating high efficiency for Eosin Y adsorption. Thermodynamic parameters revealed the endothermic nature of the adsorption process. All the present studies showed that using regenerated AC to remove Eosin Y from wastewater is an environmentally friendly way, and the comprehensive utilization of waste resources is also realized.
- 出版日期2018-3
- 单位昆明理工大学
