漆酶改性玉米秸秆髓的制备及其吸油特性

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Abstract With the green enzyme technology, the surface of corn stover pith (CSP) was grafted with octadecylamine by laccase to improve the hydrophilic and hydrophobic properties, which produced the efficient oil absorbent LCSP. A set of methods, like SEM, BET, XRD, contact angle, FTIR, and XPS, were used to characterize the physicochemical properties of CSP before and after modification in order to investigate the effects of modification temperature, time, TEMPO concentration, laccase dose, and octadecylamine concentration on the hydrophilic and hydrophobic properties. The results showed that the maximum oil and minimum water adsorption could be obtained after 6h modification under 35℃ when the dosage of laccase, TEMPO and octadecylamine were 100U/g, 4.48mmol/L and 8.91mmol/L, respectively. The oil adsorption capacity increased from 13.24g/g to 40.82g/g, and the water adsorption capacity decreased from 13.76g/g to 3.83g/g. The adsorption kinetics was best fitted by the pseudo-second order model. Further sorbent recycling experiments showed that LCSP had a good recycling potential.

Key words： corn stover pith laccase hydrophobicity green modification oil sorbent

Received: 22 January 2020

PACS:

X703.1

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	Articles by authors
	FAN Ting-yu
	LI Wen-jie
	PENG Dan
	CHENG Shu-ping
	GUO Xue-tao

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FAN Ting-yu,LI Wen-jie,PENG Dan等. Preparation of laccase modified corn stover pith as oil sorbent and its properties[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(9): 3810-3820.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I9/3810

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