镀镍漂洗废水中有机物的臭氧氧化处理研究  

Ozonation for removing organic contaminants from rinse water of nickel plating operations

作　　者：沈杭军[1] 杨岳平[1] 李伟[1] 

机构地区：[1]浙江大学环境工程研究所,浙江杭州310027

出　　处：《环境污染与防治》2006年第8期589-592,共4页Environmental Pollution & Control

摘　　要：用臭氧氧化处理镀镍漂洗废水中的有机物，主要考察pH、臭氧投加量、废水初始COD浓度、温度等因素对处理效果的影响，并对反应机理进行初步的探讨。实验结果表明，废水的COD去除率随pH的增大而升高，比较适宜的pH为6～7；适当地增加臭氧投加量有利于提高COD去除率；在一定温度范围（15～35℃）内，提高反应温度有利于废水中有机物的降解；当臭氧投加量为20mg／（min·L），对于初始COD为56mg／L、pH6．5的实际镀镍漂洗废水，在25℃的条件下氧化100min，出水COD降至10mg／L，COD去除率达到82％；在臭氧氧化镀镍漂洗废水的反应中，部分有机物的降解是在Ni^2＋的催化下由臭氧分解生成氧化能力更强的自由基来完成。臭氧氧化可作为镀镍漂洗废水处理回用的预处理工艺。Ozone oxidation for removing organic contaminants from rinse water of nickel plating was studied. Effects of pH, ozone dose, initial COD and temperature on COD removal efficiency were investigated. COD removal was better at a higher pH （3.3-7.8）, higher ozone dose （2. 1-36.0 mg/min）, and higher temperature （15-35 ℃）, while it declined with increasing initial COD. After 100 min of oxidation at an ozone dose of 20 mg/（min·L）, 25 ℃ and pH of 6.5 ,the rinse water COD was reduced to 10 mg/L （from 56 mg/L or 820/00 COD removal efficiency）. Oxidation of organic contaminants was partially accomplished by highly active free radicals from nickel catalyzed decomposition of ozone. Ozonation is a viable pretreatment process for recycling rinse water of nickel plating operations.

关 键 词：镀镍漂洗废水 有机污染物 臭氧催化氧化 回用 

分 类 号：X703[环境科学与工程—环境工程]