镁改性蒙脱土/纤维素复合凝胶的制备及对磷酸盐的吸附性能

doi:10.11896/cldb.17120052

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Abstract Anovel magnesium-modified montmorillonite/cellulose composite hydrogel (Mg-MMT/MCC) was prepared by free radical graft-polymerization method with cellulose as raw material, montmorillonite as filler and magnesium salt as modifier. Scanning electron microscope (SEM),X-ray diffractometer (XRD), thermogravimetric analyzer (TG) were employed to characterize the surface morphology, microstructure and thermal stability of the obtained composite hydrogel, and its swelling property was also analyzed. Meanwhile, the effects of pH value, reaction time, tempe-rature, initial phosphate concentration on the phosphate adsorption capacity of Mg-MMT/MCC were studied. It could be found from the results that the introduction of magnesium modified montmorillonite contributed to the formation of obvious pore structure with larger pore size, thinner pore wall and improved thermal stability. The amount of phosphorus adsorbed by Mg-MMT/MCC increased first and then decreased with the increase of solution pH value, reaching the maxmum at pH=7. The adsorption isotherm data accorded with both Langmuir and Freundlich isotherm adsorption models, with the saturated adsorption capacity of 194.36 mg·g^-1. The adsorption kinetic was found to be conformed to the pseudo-second order model. Besides, it is worth noting that the Mg-MMT/MCC could be readily regenerated for reuse.

Key words： cellulose composite hydrogel magnesium-modified montmorillonite phosphate

Published: 31 May 2019

CLC number:	TB34
	X52

Fund:This work was financially supported by the National Natural Science Foundation of China (21507086), Shanghai Sailing Program (16YF1408100, 14YF1409900).

About author:: Jiayuan Wang, From September 2016 to May 2019, he studied at School of Environment and Architecture, University of Shanghai for Science and Technology, focusing on the research of water pollution control and development of new environmental materials.Yin Wangworked at School of Environment and Architecture, University of Shanghai for Science and Technology, lecturer. She received her Ph.D. degree in environmental science from College of Environmental Science and Engineering, Tongji University in January 2013. Her research interests are water pollution control and development of water treatment functional mate-rials.

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	WANG Jiayuan
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	DU Baobao
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	ZHANG Xiaodong

Cite this article:

WANG Jiayuan,WANG Yun,DU Baobao, et al. Synthesis of Magnesium-modified Montmorillonite/Cellulose Composite Hydrogel and Its Adsorption Performance for Phosphate[J]. Materials Reports, 2019, 33(12): 2076-2083.

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http://www.mater-rep.com/EN/10.11896/cldb.17120052 OR http://www.mater-rep.com/EN/Y2019/V33/I12/2076

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