pH对无氧条件下零价铝直接还原酸性橙7的影响  

Effect of pH on directly reductive decolorization of Acid Orange 7 under anaerobic condition by zero-valent aluminum

作　　者：杨世迎[1,2] 石超[2] 徐婷[2] 郑迪[2] 

机构地区：[1]海洋环境与生态教育部重点实验室,青岛266100 [2]中国海洋大学环境科学与工程学院,青岛266100

出　　处：《环境化学》2015年第10期1785-1790,共6页Environmental Chemistry

基　　金：国家自然科学基金(21107101)资助

摘　　要：探讨了零价铝(ZVAl)在不同pH(1.0—3.0,8.0—12.0)条件下对于典型偶氮染料酸性橙7(AO7)的直接还原脱色效果,实验表明,ZVAl酸性和碱性条件下对于AO7表现出不同的还原脱色性能.与酸性条件相比(pH=1.0时,240 min内AO7还原脱色率17%),ZVAl在碱性条件下对于AO7的还原脱色效果优良,而且不需要诱导时间,甚至能够在pH=12.0时,60 min内还原脱色AO7达72.3%;在碳酸钠缓冲溶液中,ZVAl能够更加有效地还原脱色AO7,在pH=12.0时,60 min内可以还原脱色AO7达到97%.Effect of pH（ 1. 0—3. 0,8. 0—12. 0） on directly reductive decolorization of AcidOrange 7（ AO7）,a typical azo dye,under anaerobic condition by zero-valent aluminum（ ZVAl）was investigated. The results show that ZVAl had different effects under acidic and alkaline condition on reductive decolorization of AO7. Compared with acidic conditions（ 17% at pH = 1. 0 at 240min）,ZVAl under alkaline condition reductively decolorized AO7 more effectively（ 72. 3% at pH12. 0 at 60 min）,and the reaction did not need any induction time. Especially in carbonate buffered solution,ZVAl reductively decolorized AO7 up to 97% at pH 12. 0 in 60 min.

关 键 词：零价铝 PH 酸性橙7 还原脱色 碳酸钠缓冲溶液. 

分 类 号：X703[环境科学与工程—环境工程]