Environ Sci Technol 2021 Sep 15. Epub 2021 Sep 15.
Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
Microbially derived extracellular polymeric substances (EPSs) occupy a large portion of dissolved organic matter (DOM) in surface waters, but the understanding of the photochemical behaviors of EPS is still very limited. In this study, the photochemical characteristics of EPS from different microbial sources (, , and sewage sludge flocs) were investigated in terms of the production of reactive species (RS), such as triplet intermediates (EPS*), hydroxyl radicals (OH), and singlet oxygen (O). The steady-state concentrations of OH, EPS*, and O varied in the ranges of 2. Read More