期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 24, 页码 31301-31311出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-021-12913-x
关键词
UV filters; KMnO4; Intermediate products; Mechanisms; Toxicity assessment
资金
- National Natural Science Foundation of China [21607073, 21876082]
- Fundamental Research Funds for the Central Universities [14380137]
This study systematically investigated the chemical oxidation process of BP-3 by KMnO4, and evaluated the influences of various factors on BP-3 degradation efficiency. The results showed that KMnO4 could effectively degrade BP-3 and reduce its toxicity under specific conditions, suggesting it as a promising technique for BP-3 removal.
Benzophenone-3 (BP-3) is used in a wide range of personal care products and plastics to resist ultraviolet light, which has aroused considerable public concern due to its endocrine-disrupting effects. In this work, we systematically investigated the chemical oxidation process of BP-3 by KMnO4. The influences of several factors, such as pH, oxidant dose, temperature, coexisting water constituents, and water matrices, on BP-3 degradation efficiency were evaluated. The removal rate of 10 mu M BP-3 could reach 91.3% in 2 h under the conditions of pH = 8.0, [BP-3](0):[KMnO4](0) = 1:20, and T = 25 degrees C, with the observed rate constant (k(obs)) value of 0.0202 min(-1). The presence of typical anions (Cl-, NO3-, SO42-) and HA could slightly increase BP-3 removal, while HCO3- caused a relatively significant promotion of BP-3 degradation. On the basis of mass spectrometry and theoretical calculations, hydroxylation, direct oxidation, and carbon-carbon bridge bond cleavage were mainly involved in the oxidation process. Toxicity assessment revealed that the acute and chronic toxicities were reduced significantly, which suggested KMnO4 is a promising technique for BP-3 removal.
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