Heterogeneous photocatalytic degradation of pharmaceuticals in synthetic and real matrices using a tube-in-tube membrane reactor with radial addition of H2 O2

The Science of the Total Environment
Elisabeth Cuervo LumbaqueVítor J P Vilar

Abstract

A tube-in-tube membrane reactor, with radial addition of hydrogen peroxide, was used for the oxidation of four pharmaceuticals, paracetamol (PCT), furosemide (FRS), nimesulide (NMD), and diazepam (DZP), in a continuous-mode operation, using photochemical and photocatalytic processes, driven by UVA or UVC photons. This reactor allows a controlled titration of small H2O2 doses (inside-out mode) to the catalyst particles immobilized in the membrane shell side and to the annular space between the membrane inner tubing and the concentric outer quartz tubing, where water to be treated flows. Tests were performed using synthetic (SWW) and real (urban wastewater after secondary treatment) (UWW) matrices, both spiked with the pharmaceutical mix solution (200 μg L-1 of each). The photochemical and photocatalytic oxidation efficiency was evaluated as a function of H2O2 dose (5-20 mg L-1), oxidant injection mode (radial permeation vs injection upstream from the reactor inlet), light source (UVA vs UVC lamps) and aqueous matrix (synthetic vs real matrix). At steady-state regime, the UVC/H2O2/TiO2 system, with radial H2O2 addition (20 mg L-1), showed the highest pharmaceuticals removal percentage, PCT (27.4%), FRS (35.0%), NMD (24.2%) and DZ...Continue Reading

References

Feb 26, 2009·Environmental Science & Technology·Liming YangMadhumita B Ray
Nov 6, 2012·Journal of Hazardous Materials·Edgar MoctezumaCarlos Montalvo
Dec 10, 2013·Water Research·Juying LiJay Gan
Sep 23, 2014·Chemical Reviews·Jenny SchneiderDetlef W Bahnemann
Jun 6, 2015·Journal of Molecular Modeling·Rosivaldo S BorgesMarta C Monteiro
Apr 21, 2017·The Science of the Total Environment·Luana Márcia Bezerra BatistaCarlos Alberto Martínez-Huitle
Aug 20, 2018·The Science of the Total Environment·Paula PaígaCristina Delerue-Matos
Feb 15, 2019·The Science of the Total Environment·Sara G S SantosVítor J P Vilar

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Citations

Sep 19, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Yongfang RaoJingchen Hao
May 14, 2021·Environmental Science and Pollution Research International·Alexandre DiórioVítor J P Vilar
Nov 7, 2021·Environmental Science and Pollution Research International·Luis A González-BurciagaJosé B Proal-Nájera

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