Effect of pH on Homogeneous Photodegradation of Eosin Y Dye

Subrata Roy, A. J. Mahmood
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Abstract

Eosin Y (EY), an anionic dye, also known as Eosin Yellow or Bromoeosin, or Acid red 27 is an industrial dye. The residual dye, discharged as one of the components of the untreated effluent, into the adjacent surface and causes water pollution. Photodegradation of EY was investigated at 29 oC in homogeneous aqueous media using UVA light (≈400 – 320 nm) in acetate buffer solution as a function of pH (3.08-7.08). At higher pH, there was no effect of this light on the dye in the solution. Results show that the initial rate of photocolorization increased with decreasing the pH of the dye solution.
pH对伊红Y染料均匀光降解的影响
伊红Y (EY)是一种阴离子染料,也被称为伊红黄或溴红,或酸性红27,是一种工业染料。残留的染料作为未经处理的废水的组成部分之一排放到邻近的表面,造成水污染。用UVA光(≈400 ~ 320 nm)在29℃的均匀水介质中研究了醋酸缓冲液中EY的光降解与pH(3.08 ~ 7.08)的关系。在较高的pH值下,这种光对溶液中的染料没有影响。结果表明,随着染料溶液pH值的降低,初始光着色速率增大。
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