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Adsorptive removal of resorcinol on a novel ordered mesoporous carbon(OMC) employing cok-19 silica scaffold:Kinetics and equilibrium study

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Journal of Environmental Sciences 2019年第1期31卷 307-317页

作者： Zaki Uddin Ahmad Qiyu Lian Mark E.Zappi Prashanth R.Buchireddy Daniel Dianchen Gang Department of Civil Engineering University of Louisiana at Lafayette Center for Environmental Technology The Energy Institute of Louisiana Department of Chemical Engineering University of Louisiana at Lafayette

Phenolic compounds and their derivatives have been found in industrial wastewater, which pose threats to the natural environment. Ordered mesoporous carbon(OMC) has been identified as an ideal adsorbent possessing high specific surface area and large pore volume to alleviate these pollutants. A novel ordered mesoporous carbon was prepared using cok-19 template with the cubic Fm3 m structure for the first time. Ordered mesoporous silica cok-19 was synthesized and reported in 2015. Sucrose as the carbon precursor was impregnated into the mesopores of silica and converted to carbon through carbonization process using sulfuric acid as a catalyst. Ordered mesoporous carbon was obtained after the removal of silica framework using hydrofluoric acid. Boric acid was employed for the preparation of OMCs with tunable pore sizes in the range of 6.9–16.6 nm. Several characterization techniques such as nitrogen adsorption–desorption isotherms, transmission electron microscope(TEM), Fourier transform infrared spectroscopy, Boehm titration and elemental analysis were employed to characterize the OMCs. The pore size analysis and TEM images confirmed that OMC has replicated the mesostructure of the cok-19. Results obtained from adsorption kinetics and isotherms suggest that the Pseudo-second-order model and Langmuir isotherm well described the experimental data.

关键词： Ordered mesoporous carbon cok-19 TEM image Resorcinol Adsorption isotherm Adsorption kinetics

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