铁促电解去除高浊度老龄垃圾渗滤液COD的机理  

COD Removal Mechanism of High-turbidity Leachate from on Old Landfill Using Iron-promoting Electrolysis Process

作　　者：褚衍洋[1] 徐迪民[2] 白卯娟[1] 

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《污染防治技术》2007年第4期3-6,20,共5页Pollution Control Technology

摘　　要：铁促电解是去除水中有机污染物的新型方法,采用箱式电化学反应器研究了该法去除填埋场高浊度老龄垃圾渗滤液COD的机理。实验结果表明:用浊度衡量老龄垃圾渗滤液非溶解态有机物的含量是合理的;垃圾渗滤液中非溶解态有机物对铁促电解去除COD的效率有显著影响。铁促电解对高浊度垃圾渗滤液COD的去除存在三种机理,即电化学氧化、电解气浮和絮凝沉淀。随着水质与实验参数的变化,三种机理对COD总去除率的贡献亦发生变化;对比了Fe2+与Fe3+促进COD去除的效果,提出了一种铁离子循环电解处理老龄垃圾渗滤液的新工艺。The iron - promoting electrolysis is a new process for the removal of organic pollutants. The COD removal mechanism of high - turbidity leachate from on old landfill was investigated using box - style electrochemical reactor. Results showed that it was reasonable to evaluate the content of non - dissoluble organic pollutants by turbidity. The COD removal efficiency was siqnificantly influenced by the non - dissoluble organic pollutants. In the iron - promoting electrolysis process, there were three pathways contributed to the COD removal of high - turbidity leachate, namely electrochemical oxidation, electrochemical floatation, and flocculation. The contributions of three pathways for COD removal varied with water quality and test parameters. The COD removal promoted by Fe^2＋ and Fe^3＋ was compared, and a promising electrochemical process with iron recycling for the treatment of leachate from old landfill was proposed.

关 键 词：铁促电解 渗滤液 化学需氧量 FE^2+ 

分 类 号：X506[环境科学与工程—环境工程]