期刊
DESALINATION AND WATER TREATMENT
卷 231, 期 -, 页码 297-314出版社
DESALINATION PUBL
DOI: 10.5004/dwt.2021.27492
关键词
Ultraviolet; Ultraviolet-coupled advanced oxidation processes; Disinfection by-products; Precursor
Disinfection is essential for killing pathogens in water, but disinfection by-products pose threats to human health and the environment. Removing disinfection by-product precursors is an effective method, and UV-coupled advanced oxidation processes show great potential for development.
Disinfection is an indispensable water treatment process to kill pathogens in water and prevent water-borne diseases. However, the disinfection by-products generated in the process have become the main cause of threats to human health and the ecological environment. Many studies have shown that removing the precursors of disinfection by-products is currently one of the most effective methods to reduce the production of disinfection by-products. Ultraviolet-coupled advanced oxidation processes can generate strong oxidizing free radicals through ultraviolet light activation to efficiently remove disinfection by-product precursors. It makes up for the deficiencies of traditional oxidation technology, has important significance in reducing the generation potential of disinfection by-products, and improving water quality conditions, with broad development prospects. This paper reviews the mechanisms and advances of several UV-coupled advanced oxidation processes for the treatment of disinfection by-product precursors, UV/ozone (UV/O-3), UV/hydroperoxide (UV/H2O2), UV/persulfate (UV/PS), UV/chlorine (UV/Cl-2) included. The treatment effects, advantages, and disadvantages of various advanced oxidation processes are compared, moreover, the future research directions and problems to be solved for the removal of disinfection by-products and precursors are proposed to promote the achievement of practical engineering application of UV coupled advanced oxidation processes.
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