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PRM removal in the presence and absence of t-butanol in UV-Vis/TiO2 and UV-Vis/TiO2/O3 systems and in the presence oxalic acid in UV-Vis/TiO2/O3 system. Experimental conditions: Ultrapure water; [PRM]0 = 5 mg L−1; pH0~6 (natural pH); Qm,O3 = 3.3 mg min−1; T = 20–30 °C; IUV-Vis = 8.2 × 10−5 Einstein L−1 s−1.
