第 52 卷第 6 期Vol. 52 No. 6
2022 年 12 月Dec 2022

所属栏目:安全与环保

在微波加热下对造纸废液中木质素催化降解反应的研究
周建波,崔小莹,陈 文,向 超,伏再辉 (长沙医学院 基础医学院,湖南 长沙 410219)
摘 要:基于凝胶渗透色谱(GPC)和紫外-可见分光光度法(UV-Vis)对微波加热条件下催化降解造纸黒液进行了研究,探究了不同催化剂、加热方法、微波功率、加热时间、催化剂用量等因素对木质素降解反应的影响。优化的催化反应条件为:70 mL造纸黑液,0.5 g催化剂HZSM-5,微波功率450~550 W,反应时间2.5 h。优化条件下,木质素分子量由2 000~3 000下降到800~1 000,酚羟基含量从1.90 mmol/g上升到3.30 mmol/g。
关键词:造纸黒液;木质素;微波加热;催化降解
中图分类号:X703  文献标识码:A  文章编号:1009-9212(2022)06-0071-04
Catalytic Degradation of Lignin in Waste Water from the Paper Mill Assisted by Microwave
ZHOU Jian-bo, CUI Xiao-ying, CHEN Wen, XIANG Chao, FU Zai-hui (Basic Medical System of Changsha Medical University, Changsha 410219, China)
Abstract:The waste water from the paper mill was catalytically degraded under microwave heating, and results was used to evaluate the effects of the type of catalyst, heating methods, microwave power, heating time, and catalyst dosage on lignin degradation reaction by GPC and UV-Vis. The optimized catalytic reaction conditions were determined as follows: 70 mL black waste water from the paper mill, 0.5 g catalyst HZSM-5, microwave power of 450~550 W, reaction time of 2.5 h. Under optimized conditions, the molecular weight of lignin decreased from 2 000~3 000 to 800~1 000, and the phenolic hydroxyl content increased from 1.901 mmol/g to 3.301 mmol/g.
Key words:waste water from the paper mill; lignin; microwave heating; catalytic degradation
基金项目:湖南省教育厅资助项目(18C1188,21C0869)。
作者简介:周建波(1979—),女,湖南衡阳人,副教授,硕士,研究方向:有机催化合成研究(E-mail:zhoujianbo0603@126.com)。
收稿日期:2022-10-27