Abstract
Photodegradation of nonylphenol ethoxylates (NP 10EO) was investigated in laboratory scale under UV irradiation. The intermediate photodegradation products were analyzed by LC–ESI-MS. Three kinds of intermediate products including aldehydic compounds, carboxylic compounds and cyclohexanyl compounds were identified. Five main degradation routes involving the oxidation of the alkyl chain and ethoxylate unit, shortening of the alkyl chain and ethoxylate unit, hydrogenation of the benzene ring were proposed.
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