期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 242, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2020.116792
关键词
Magnetic diatomite; Nitrobenzene; Adsorption and separation
资金
- National Key Research and Development Program of China [2017YFB0602500]
- National Natural Science Foundation of China [21607074]
- Major Natural Science Research Projects of Universities in Jiangsu, China [16KJA610002]
A novel magnetic diatomite was synthesized using a two-step method combining precipitation and combustion methods. The prepared magnetic diatomite with functional particles and strong magnetism was verified by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometer. Results showed that the modified magnetic diatomite performed better than the raw diatomite in the efficient removal of nitrobenzene from aqueous solution. The adsorption kinetics and the isothermal and desorption-adsorption properties were also studied. Results revealed that the adsorption kinetics and isothermal data corresponded to the pseudo-first-order kinetic model and chemisorption process. Desorption-adsorption experiments were conducted, and the as-prepared magnetic diatomite remained to have high nitrobenzene adsorption efficiency even after six cycles of desorption and adsorption. Furthermore, the synthesized magnetic diatomite can be quickly and easily separated using a magnet before and after adsorption.
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