Study of the Photodegradation of PBDEs in Water by UV-LED Technology

Molecules

Maria Auset¹  Jordi Díaz-Ferrero¹  Rafael Gonzalez-Olmos¹  Meritxell Valentí-Quiroga¹ 

[1] IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain;

关键词: flame retardants;    polybrominated diphenyl ethers;    photodegradation;    UV-LED;   

DOI  :  10.3390/molecules26144229

来源: DOAJ

【 摘 要 】

Polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that can arrive to water bodies from their use as flame retardants in a wide range of applications, such as electric and electronic devices or textiles. In this study, the photodegradation of PBDEs in water samples when applying UV-LED radiation was studied. Irradiation was applied at three different wavelengths (255 nm, 265 nm and 285 nm) and different exposure times. The best degradation conditions for spiked purified water samples were at 285 nm and 240 min, resulting in degradations between 67% and 86%. The optimized methodology was applied to real water samples from different sources: river, marine, wastewater (effluent and influent of treatment plants) and greywater samples. Real water samples were spiked and exposed to 4 hours of irradiation at 285 nm. Successful photodegradation of PBDEs ranging from 51% to 97% was achieved for all PBDE congeners in the different water samples with the exception of the marine one, in which only a 31% of degradation was achieved.

【 授权许可】

Unknown