摘要
利用多巴胺仿生修饰活性碳纤维,通过共价键作用固定化漆酶,采用扫描电镜(SEM)和红外光谱(FTIR)对该生物材料进行表征,考察了其对蒽醌型染料活性蓝KN-R的脱色效果及主要影响因素。试验结果表明,与游离漆酶及活性碳纤维相比,该固定化漆酶对活性蓝KN-R具有较好的催化降解效能。采用0.5 g固定化漆酶催化降解40 m L初始质量浓度为75 mg/L的活性蓝KN-R,反应10 h,染液基本为无色,经紫外光谱(UV)测定发现,废水中染料分子的芳香结构和共轭体系基本被降解。当p H值在3.0~6.0,温度在20~40℃范围内时,固定化漆酶的脱色效果较好,并且具有良好的热稳定性能和操作稳定性,循环使用3次后,仍有较高的脱色降解能力。
Activated carbon fibers （ACFs） are modified by dopamine with self-polymerization （DA-ACFs）, and immobilized laccase on the surface of DA-ACFs via cross-linking （LDA-ACFs）. The surface composition and microstructure of samples are characterized by scanning electron microscopy （SEM）, Fouriertransform infrared reflection （FTIR）. Compared with free laccase and ACFs, the results indicate that the immobilized laccase has a good catalytic capacity for Reactive Blue KN-R removal. The dyeing wastewater is basically colorless after 10 h treatment with 0.5 g of LDA-ACFs for the degradation of Reactive Blue KN-R （volume 40 mL, the initial concentration 75 mg/L）, and the aromatic structure and conjugated system of the dye molecules in the wastewater are nearly degraded that characterized by ultraviolet spectroscopy （UV）. The immobilized laccase exhibits a good decolourization ratio over a pH range of 3.0～ 6.0 and a temperature of 20-40 ℃, as well as high thermo-stability and operational stability. Good decolourization of immobilized laccase remains with the third recycled LDA-ACFs.
作者
张陈成
韩萍芳
吕效平
李亚
蒋云霞
ZHANG Chen-cheng;HAN Ping-fang;LV Xiao-ping;LI Ya;JIANG Yun-Xia(School of Textile and Clothing,Nantong University,Nantong 226019,China;College of Biotechnology and Pharmaceutical Engineering,Nanjing University of Technology,Nanjing 211816,China;Nantong College of Science and Technology,Nantong 226007,China)
出处
《印染》
北大核心
2018年第14期7-11,共5页
China Dyeing and Finishing
基金
南通市科技计划项目(MS12015033)
南通市科技项目(GY12016035)
关键词
印染废水
多巴胺
活性碳纤维
漆酶
蒽醌型染料
dyeing and finishing wastewater
dopamine
activated carbon fibers
laccase
anthraquinone dyes
