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Transformation and toxicity assessment of two UV filters using UV/H 2 O 2 process

Transformation and toxicity assessment of two UV filters using UV/H 2 O 2 process

Mingguo Peng, Erdeng Du, Zhihong Li, Dongdong Li, Huajie Li

Sci Total Environ. 2017 Dec 15;603-604:361-369.

PMID: 28633113

Abstract:

The treatment of two typical UV filters benzophenone-4 (BP4) and benzophenone-9 (BP9) was evaluated in aqueous solutions by UV/H2O2 process. High-resolution accurate mass spectrometry (HRMS) was used to identify the degradation intermediates. A total of 12 BP4 degradation products and 17 BP9 degradation products were identified. A series of OH-initiated reactions, including hydroxylation, dihydroxylation, decarboxylation, demethylation, and ring breaking, lead to the final mineralization of BP4 and BP9. The degradation mechanisms of BP4 and BP9 are also proposed, separately. Toxicity prediction and assessment indicate that the bio-toxicity of the intermediates is higher, even if the parent compounds are completely transformed. It is necessary to further assess the environmental risk of BP4, BP9 and their intermediates in engineered systems and ambient aquatic environments.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP76656365	Benzophenone-9		76656-36-5	Price

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