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环境化学  2015 

pH对无氧条件下零价铝直接还原酸性橙7的影响

Keywords: 零价铝,pH,酸性橙7,还原脱色,碳酸钠缓冲溶液

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Abstract:

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,240min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,60min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,60min内可以还原脱色AO7达到97%.

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