UV-activated persulfates oxidation of anthraquinone dye: Kinetics and ecotoxicological assessment

Sulfate radical-based advanced oxidation processes (SR-AOPs) are gaining popularity as a feasible alternative for removing recalcitrant pollutants in an aqueous environment. Persulfates, namely peroxydisulfate (PDS) and peroxymonosulfate (PMS) are the most common sulfate radical donors. Persulfates activation by ultraviolet (UV) irradiation is considered feasible due to the high concentration of radicals produced as well as the lack of catalysts leaching. The research focuses on determining the impact of activated PDS and PMS on the degradation of anthraquinone dye, i.e., Acid Blue 129 (AB129). UV-activated PDS and PMS can quickly degrade the AB129 as well as restrict the formation of by-products. This could explain the reduced ecotoxicity levels of the treated water after degradation, using an aquatic plant (Lemna minor) and a crustacean (Daphnia magna). This, on the other hand, can ensure that the sulfate radical-based processes can be an environmentally friendly technology.

Automated summary

Sulfate radical-based advanced oxidation processes (SR-AOPs) are being recognized as an effective alternative for removing persistent pollutants in water. Persulfates, such as peroxydisulfate (PDS) and peroxymonosulfate (PMS), are commonly used sulfate radical donors. UV-activated PDS and PMS can efficiently degrade anthraquinone dye (AB129) and inhibit the formation of by-products. This research demonstrates the reduced ecotoxicity of treated water after degradation, confirming the environmental friendliness of sulfate radical-based processes.