A review of ecotoxicity reduction in contaminated waters by heterogeneous photocatalytic ozonation

Magnetically recyclable nanophotocatalysts in photocatalysis-involving processes for organic pollutant removal from wastewater: current status and perspectives

“…177 Second, ozone reacts with water to generate H 2 O 2 , which can be cleaved into ˙OH by UV light (eqn (20) and ( 21)). 178 Second, ozone can be reduced by electrons to ozonide radicals (eqn (22)), which further react with H + to produce ˙OH (eqn (23) and ( 24)). 179 Third, the O 2 ˙− produced through the reaction between oxygen and electrons (eqn (3)) can also react with ozone to generate ozonide radicals (eqn (25)) and further produce ˙OH through a chain reaction (eqn ( 23) and ( 24)).…”

Challenges on solar oxidation as post-treatment of municipal wastewater from UASB systems: Treatment efficiency, disinfection and toxicity

“…After all, bioassays offer vital insight into the feasibility of post-treatment alternatives for MSE treatment as they enable the detection of effects promoted by the mixture of compounds ( Escher et al, 2020 ). In addition, bioassays are generally quick, simple, and low-cost ( Lashuk and Yargeau, 2021 ). Fig.…”

Oil and Gas Produced Water Reuse: Opportunities, Treatment Needs, and Challenges

“…For beneficial reuse, treatment trains might require a process dedicated to reducing the toxicity of the treated produced water to ensure public and environmental safety. Recently, promising studies have shown that photocatalysis-driven advanced oxidation processes (ozonation, rare metal catalyst, Fenton processes) can greatly reduce produced water toxicity. − Other technologies and processes have shown a potential for reducing toxicity, such as adsorption (granulated activated carbon, powder activated carbon, zeolite), , ion exchange, and biological treatments (activated sludge, MBR) − but require more research to determine their applicability for produced water treatment . Furthermore, if primary, secondary, and tertiary treatments are needed to meet effluent requirements, ensure sustainability, and address public concerns, the resulting treatment system may not be economically viable.…”