A comparative study of the treatment of ethylene plant spent caustic by neutralization and classical and advanced oxidation

A comparative study of the treatment of ethylene plant spent caustic by neutralization and classical and advanced oxidation

Type	Journal Article
Author	Alaa Hawari
Author	Hasanat Ramadan
URL	http://www.sciencedirect.com/science/article/pii/S0301479714006173
Volume	151
Pages	105-112
Publication	Journal of Environmental Management
Date	March 15, 2015
Abstract	Reports a study of the treatment of spent caustic produced from an ethylene plant. Researchers observed that neutralization case alone the maximum removal of sulfide was at pH values below 5.5. The higher percentage removal of sulfides was accompanied with the highest COD removal. For classical oxidation using H2O2 the maximum COD removal percentage reached 89% at pH = 2.5 and at a hydrogen peroxide concentration of 19 mM/L. For the advanced oxidation using Fenton's process, researchers observed that the maximum COD removal of 96.5% was achieved at a hydrogen peroxide/ferrous sulfate ratio of (7:1).