文献类型：期刊文献

英文题名：Removal of p-nitrophenol from simulated sewage using MgCo-3D hydrotalcite nanospheres: capability and mechanism

作者：Gao, Fei[1];Xu, Xinru[1];Yang, Jingyi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China

年份：2022

卷号：12

期号：41

起止页码：27044

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20224313003118);WOS:【SCI-EXPANDED(收录号:WOS:000857991800001)】；

语种：英文

外文关键词：Activation energy - Adsorption - Energy dispersive spectroscopy - Fourier transform infrared spectroscopy - Hydrogen bonds - Monolayers - Nanospheres - Organic pollutants - Scanning electron microscopy - Sewage - Transmission electron microscopy

摘要：4-Nitrophenol (4-NP) is an organic pollutant found in the wastewater discharged from coking and petrochemical industries, and it is highly toxic, persistent, and bioaccumulative. 4-NP is difficult to degrade and causes serious damage to human health and the ecological environment. In this study, MgCo-3D hydrotalcite nanospheres were synthesized via the hot solvent method using ZIF-67 as a template for 4-NP removal from wastewater. The composition and structure of MgCo-3D hydrotalcite nanospheres were characterized via X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission Electron Microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Energy Dispersive Spectroscopy (EDS), and BET analyses. The maximum adsorption capacity was 131.59 mg g(-1) under the optimized conditions (pH = 7, t = 298 K, C-0 = 50 mg L-1, dose = 0.4 g L-1). The adsorption obeyed the Langmuir, Redlich-Peterson and Sips models and pseudo-second-order kinetics, and the adsorption activation energy was 29.4 kJ mol(-1), indicating a monolayer physical adsorption phenomenon. The adsorption of 4-NP on the MgCo-3D hydrotalcite nanospheres mainly involved hydrogen bonding and electrostatic interactions. The nanospheres were regenerated using the hot-air purging method. After five adsorption-desorption cycles, the adsorption capacity reached 107.6 mg g(-1), indicating the good regeneration performance of the MgCo-3D hydrotalcite nanospheres.