磁性阳离子型壳聚糖絮凝剂去除Cr (Ⅵ)

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Abstract A new magnetic chitosan flocculant FSCAD was synthesized by using magnetic Fe₃O₄ coated with silica and silane coupling agent (KH-570) as magnetic core, chitosan, acrylamide and acryloyloxyethyl trimethylammonium chloride as graft monomers and low-pressure ultraviolet light as initiator, the Cr(Ⅵ) removal properties of the material were studied. The flocculants were characterized by fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffractometer and vibration sample magnetometer, showing the materials were successfully prepared and have good magnetic response. The effects of pH, dosage, reaction time and interference ions on flocculation properties were explored and fitted to the flocculation dynamics model. The flocculation kinetics accorded with the pseudo second order kinetic equation and the removal effect of FSCAD on low concentration Cr(Ⅵ) wastewater reached 90.48% at the added amount of 900mg/L, pH of 3 and the reaction time of 60min.

Key words： magnetic flocculant low-pressure UV chitosan grafting modification Cr(Ⅵ)

Received: 10 July 2021

PACS:

X703.1

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	Articles by authors
	ZHENG Huai-li
	ZHONG Zheng
	ZOU Hong
	BAI Ying
	ZHAO Rui
	DING Wei
	JIANG Jun-yi

Cite this article:

ZHENG Huai-li,ZHONG Zheng,ZOU Hong等. Synthesis of magnetic cationic chitosan flocculant by low-pressure UV light for the removal of Cr(Ⅵ)[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 745-752.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I2/745

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