您目前的位置: 首页 / 动态新闻

本科生郭婕同学为一作的论文在J Environ Chem Eng发表

    本科生郭婕同学(现为中国地质大学(北京)硕士研究生)利用NMTer课题组的明星MOF材料BUC-17为吸附剂用于吸附去除废水中的Cr(VI),相关成果发表在Journal of Environmental Chemical  Engineering。

Adsorptive removal of Cr(VI) from simulated wastewater in MOF BUC-17 ultrafine powder

Abstract: A water-stable metal-organic framework [Co3(tib)2(H2O)12](SO4)3 (BUC-17) with 2D graphene-like crystal structure was tuned to produce ultrafine powder via the introduction of absolute ethanol. The BUC-17 powders were further characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Zeta potential analysis. The BUC-17 ultrafine powder exhibited excellent adsorption performance toward Cr(VI) from simulated wastewater, in which the maximum uptake capacity is 121 mg g-1 at pH = 4. The kinetics fitting results revealed that the adsorption process is more suitably described by the pseudo-second-order kinetics model. The negative standard free energy change ΔG0, positive enthalpy change ΔH0, and positive entropy change ΔS0 of the adsorption process implied that the adsorption between BUC-17 and Cr(VI) was spontaneous and endothermal. As well, the influencing factors of the adsorption process like pH, adsorbent dosage, initial concentration and foreign ions were investigated. Finally, the adsorption mechanism of BUC-17 toward Cr(VI) was proposed.

Key Words: BUC-17; ultrafine powder; Cr(VI); adsorption; mechanism

https://doi.org/10.1016/j.jece.2019.102909