漆酶改性玉米秸秆髓的制备及其吸油特性

范廷玉; 李文洁; 彭丹; 程书平; 郭学涛

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (9) : 3810-3820.

水污染与控制

漆酶改性玉米秸秆髓的制备及其吸油特性

范廷玉¹, 李文洁¹, 彭丹², 程书平¹, 郭学涛³

作者信息 +

Preparation of laccase modified corn stover pith as oil sorbent and its properties

FAN Ting-yu¹, LI Wen-jie¹, PENG Dan², CHENG Shu-ping¹, GUO Xue-tao³

Author information +

文章历史 +

摘要

采用绿色生物酶技术改性玉米秸秆髓（CSP），在CSP表面由漆酶催化接枝十八胺，以提高材料的亲油疏水性能，制得高效吸油剂LCSP.研究了改性温度、改性时间、TEMPO浓度、漆酶用量及十八胺浓度等因素对LCSP亲油疏水性能的影响，同时采用SEM、BET、XRD、接触角、FTIR、XPS等分析技术对改性前后CSP理化特性进行表征，并进行了吸油研究.结果表明，在35℃下，投加100U/g的漆酶、4.48mmol/LTEMPO、8.91mmol/L十八胺，改性CSP6h，制得的材料吸油量最大、吸水量最小，油吸附量从13.24g/g提升至40.82g/g，水吸附量从13.76g/g降至3.83g/g.吸附过程符合准二级动力学模型，吸附剂的重复利用实验表明本方法制备的材料具有良好回收再利用能力.

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.

导出引用

范廷玉, 李文洁, 彭丹, 程书平, 郭学涛. 漆酶改性玉米秸秆髓的制备及其吸油特性[J]. 中国环境科学. 2020, 40(9): 3810-3820

FAN Ting-yu, LI Wen-jie, PENG Dan, CHENG Shu-ping, GUO Xue-tao. Preparation of laccase modified corn stover pith as oil sorbent and its properties[J]. China Environmental Science. 2020, 40(9): 3810-3820

中图分类号： X703.1

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