Biotoxicity of Water-Soluble UV Photodegradation Products for 10 Typical Gaseous VOCs

International Journal of Environmental Research and Public Health
Zhuqiu SunHong-ying Hu

Abstract

Ultraviolet (UV) photodegradation is increasingly applied to control volatile organic compounds (VOCs) due to its degradation capabilities for recalcitrant compounds. However, sometimes the UV photodegradation products are also toxic and can affect human health. Here, 10 VOCs at 150~200 ppm in air were treated using a laboratory-scale UV reactor with 185/254 nm irradiation, and the biotoxicity of their off-gas was studied by investigating their off-gas absorption solutions. The CO₂ increase and VOC decrease were 39~128 ppm and 0~42 ppm, respectively, indicating that the VOCs and their products were mineralized in off-gas absorption solutions. The total organic carbon (TOC) of the absorption solutions are 4~20 mg∙L-1. Luminescent bacteria and Daphnia magna were used to detect the acute toxicity, and an umu assay was used to determine the genotoxic potential. Trichloroethylene showed a highest toxicity to luminescent bacteria, while chlorobenzene had the lowest toxicity. Water-soluble UV photodegradation products for styrene are very toxic to Daphnia magna. In the umu assay, the genotoxicities of off-gas absorption solutions of trichloroethylene, methylbenzene, ethyl acetate, butyl alcohol, and styrene were 51.26, 77.80, 86.89, 9...Continue Reading

References

Sep 1, 2007·Environmental Health and Preventive Medicine·Yoshimitsu OdaAkio Koizumi
Mar 29, 2013·The Journal of Toxicological Sciences·Kohei KawabataShigeru Ohta
Jan 17, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Stephen O HaySteven Suib
Nov 8, 2016·The Science of the Total Environment·Haixia DaiHaidong Kan

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Citations

Nov 14, 2019·Scientific Reports·Shanying HeChunping Yang
Aug 23, 2020·International Journal of Environmental Research and Public Health·Nannan YuanChanghui Wang
Mar 9, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Na LiuPeng Sun

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