纳米磁粉复配混凝剂深度处理木薯酒精废水研究  

MAGNETIC NANOPARTICLE-COMPOSITED COAGULANTS AND THEIR ADVANCED TREATMENT FOR CASSAVA DISTILLERY WASTEWATER

作　　者：陈宇[1] 张明[1] 王周[1] 谢丽[1] 周琪[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092

出　　处：《环境工程》2017年第5期11-15,共5页Environmental Engineering

基　　金：国家自然科学基金(51378373;51178326);中央高校基本科研业务费专项资金;博士后基金(2016M591713);同济大学污染控制与资源化研究国家重点实验室自主研究课题(CRRY15001)

摘　　要：将纳米Fe_3O_4颗粒与无机混凝剂FeCl_3复配,用于木薯酒精废水的强化混凝处理;探索了磁复配前后混凝剂的除浊、除有机物和脱色效果,并对絮体和出水分别进行了红外和三维荧光光谱分析。结果表明:相较于普通FeCl_3,磁复配混凝剂的浊度去除率达98.5%,除浊效果有明显提高;而溶解性有机物和致色物质的去除主要依赖于FeCl_3的作用,由于木薯酒精好氧处理出水存在木质素分解产物和类黑精,大量羟基和酰胺键易与Fe^(3+)形成金属配位键。A complicated magnetic coagulant composed by Fe3O4 nanoparticles and FeCl3 solution was adopted in this study to enhance the coagulation for cassava distillery wastewater. The coagulation performance was investigated in terms of turbidity removal, dissolved organic matter （DOM） elimination and decoloration efficiency. Flocs and coagulation effluent were analyzed by means of FT-IR and fluorescence excitation-emission matrices （EEMs） , respectively. Results showed that the magnetic coagulants exhibited greater advantages in decreasing turbidity than FeC13 , achieving 98.5% of turbidity removal. Distinguishing removals of bio-refractory DOMs and colorants mainly depended on the FeCl3-dominated coagulation process, which may due to the lignins and humic acids （probably melaloidins ） existing in the aerobically treated cassava distillery wastewater and the coordination bonds with hydroxyl, amide and Fe3＋.

关 键 词：磁混凝剂 木薯酒精废水 混凝-磁分离 

分 类 号：X797[环境科学与工程—环境工程]