醌基修饰PVA海绵的制备、表征及加速偶氮染料生物脱色研究  

Preparation and characterization of the functional PVA grafted with quinone,and the declorization of azo dye

作　　者：侯正浩 郭延凯[2] 许晴[1] 张华雨[1] 牛春梅[1] 廉静[2] 郭建博[1,2] 

机构地区：[1]河北科技大学材料科学与工程学院,石家庄050018 [2]河北科技大学环境科学与工程学院,河北省污染防治生物技术实验室,石家庄050018

出　　处：《环境科学学报》2015年第11期3508-3514,共7页Acta Scientiae Circumstantiae

基　　金：河北省高校百名优秀创新人才支持计划(No.BR2-211);河北省杰出青年科学基金项目(No.E2012208012);国家自然科学基金青年科学基金项目(No.51208170)~~

摘　　要：非水溶性氧化还原介体催化强化污染物降解是目前环境领域研究的热点,通过合成实验开发出醌基功能基团接枝聚乙烯醇海绵(PVA)载体,从而制备出含有醌基的高分子介体材料,并进行偶氮染料生物降解研究.醌基修饰PVA海绵中醌基含量是0.08 mmol·g-1,其中最佳胺化时间为6 h,最佳胺化温度是30℃,最佳接醌时间是2 h,最佳接醌温度为40℃.通过元素分析与扫描电镜表明醌基基团已经成功固定到PVA表面.合成的以PVA为载体的醌基高分子介体材料对偶氮染料进行生物降解,实验表明醌基修饰PVA具有高效的催化活性和良好的催化稳定性.多次循环使用后仍能保持较高的生物脱色催化性能,使得其在水污染处理方面具有良好的实际应用前景.It is important that non-dissolved quinone redox mediators can enhance the degradation of refractory pollutants. This study investigated the preparation of the functional PVA carrier grafted with quinone group and the catalytic effect on the azo dye decolorization. The quinone content in the functional PVA carrier was 0. 08 mmol·g-1. In addition,the optimum amination conditions were 6 h and 30 ℃,and the optimum quinone fixation conditions were 2 h and 40 ℃. It was shown that quinone group has been grafted on the PVA by using element analysis and scanning electron microscopy（ SEM）. The results of the azo dye biodecolorization demonstrated that the functional PVA carrier exhibited good catalytic activity and stability.Meanwhile,the functional PVA carrier remained high catalytic capability after n cycles of biodecolorization. Consequently,the functional PVA carrier has good potential applications for the wastewater treatment.

关 键 词：聚乙烯醇海绵 偶氮染料 生物降解 氧化还原介体 载体 

分 类 号：X703[环境科学与工程—环境工程]