Insights into the synergetic mechanism of a combined vis-RGO/TiO2/peroxodisulfate system for the degradation of PPCPs: Kinetics, environmental factors and products

Acero, 2000, Degradation kinetics of atrazine and its degradation products with ozone and OH radicals: a predictive tool for drinking water treatment, Environ. Sci. Technol., 34, 591, 10.1021/es990724e Aguinaco, 2012, Photocatalytic ozonation to remove the pharmaceutical diclofenac from water: influence of variables, Chem. Eng. J., 189–190, 275, 10.1016/j.cej.2012.02.072 Amasha, 2018, A comparative study of the common persulfate activation techniques for the complete degradation of an NSAID: the case of ketoprofen, Chem. Eng. J., 350, 395, 10.1016/j.cej.2018.05.118 Antoniou, 2010, Intermediates and reaction pathways from the degradation of microcystin-LR with sulfate radicals, Environ. Sci. Technol., 44, 7238, 10.1021/es1000243 Bae, 2013, Degradation of diclofenac by pyrite catalyzed Fenton oxidation, Appl. Catal. B Environ., 134, 93, 10.1016/j.apcatb.2012.12.031 Bennedsen, 2012, Influence of chloride and carbonates on the reactivity of activated persulfate, Chemosphere, 86, 1092, 10.1016/j.chemosphere.2011.12.011 Buxton, 1988, Critical view of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (•OH/•OH) in aqueous solution, J. Phys. Chem. Ref. Data, 17, 513, 10.1063/1.555805 Cao, 2010, Fabrication of rutile TiO2-Sn/anatase TiO2-N heterostructure and its application in visible-light photocatalysis, J. Phys. Chem. C, 114, 3627, 10.1021/jp100786x Chen, 2015, Phototransformation of mefenamic acid induced by nitrite ions in water: mechanism, toxicity, and degradation pathways, Environ. Sci. Pollut. Res., 22, 12585, 10.1007/s11356-015-4537-0 Chen, 2017, Study on the photocatalytic mechanism and detoxicity of gemfibrozil by a sunlight-driven TiO2/carbon dots photocatalyst: the significant roles of reactive oxygen species, Appl. Catal. B Environ., 204, 250, 10.1016/j.apcatb.2016.11.040 Chen, 2017, Photocatalytic degradation of clofibric acid by g-C3N4/P-25 composites under simulated sunlight irradiation: the significant effects of reactive species, Chemosphere, 172, 193, 10.1016/j.chemosphere.2017.01.015 Chen, 2018, Accelerated photocatalytic degradation of diclofenac by a novel CQDs/BiOCOOH hybrid material under visible-light irradiation: dechloridation, detoxicity, and a new superoxide radical model study, Chem. Eng. J., 332, 737, 10.1016/j.cej.2017.09.118 Chen, 2018, Carbon nitride modified hexagonal boron nitride interface as highly efficient blue LED light-driven photocatalyst, Appl. Catal. B Environ., 238, 410, 10.1016/j.apcatb.2018.07.053 Chen, 2012, Accelerated TiO2 photocatalytic degradation of Acid Orange 7 under visible light mediated by peroxymonosulfate, Chem. Eng. J. s, 193–194, 290, 10.1016/j.cej.2012.04.033 Cleuvers, 2004, Mixture toxicity of the anti-inflammatory drugs diclofenac, ibuprofen, naproxen, and acetylsalicylic acid, Ecotoxicol. Environ. Saf., 59, 309, 10.1016/S0147-6513(03)00141-6 Dong, 2016, The promotion effect of low-molecular hydroxyl compounds on the nano-photoelectrocatalytic degradation of fulvic acid and mechanism, Nano-Micro Lett., 8, 320, 10.1007/s40820-016-0091-7 Gao, 2017, Accelerated photocatalytic degradation of organic pollutant over metal-organic framework MIL-53(Fe) under visible LED light mediated by persulfate, Appl. Catal. B Environ., 202, 165, 10.1016/j.apcatb.2016.09.005 Gao, 2016, Insights into the mechanism of heterogeneous activation of persulfate with a clay/iron-based catalyst under visible LED light irradiation, Appl. Catal. B Environ., 185, 22, 10.1016/j.apcatb.2015.12.002 Ghauch, 2011, Fe-0-based trimetallic systems for the removal of aqueous diclofenac: mechanism and kinetics, Chem. Eng. J., 172, 1033, 10.1016/j.cej.2011.07.020 Ghauch, 2010, Aqueous removal of diclofenac by plated elemental iron: bimetallic systems, J. Hazard. Mater., 182, 64, 10.1016/j.jhazmat.2010.05.139 Ghauch, 2017, Contribution of persulfate in UV-254 nm activated systems for complete degradation of chloramphenicol antibiotic in water, Chem. Eng. J., 317, 1012, 10.1016/j.cej.2017.02.133 Ghauch, 2012, Oxidation of bisoprolol in heated persulfate/H2O systems: kinetics and products, Chem. Eng. J., 183, 162, 10.1016/j.cej.2011.12.048 Ghauch, 2012, Ibuprofen removal by heated persulfate in aqueous solution: a kinetics study, Chem. Eng. J., 197, 483, 10.1016/j.cej.2012.05.051 Harb, 2017, New insights into the origin of visible-light photocatalytic activity in Se-modified anatase TiO2 from screened coulomb hybrid DFT calculations, J. Phys. Chem. C, 117, 25229, 10.1021/jp406714e Hu, 2015, Nonmetal–metal–semiconductor-promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability, J. Mater. Chem., 3, 17858, 10.1039/C5TA05153C Ji, 2015, Thermo activated persulfate oxidation of antibiotic sulfamethoxazole and structurally related compounds, Water Res., 87, 1, 10.1016/j.watres.2015.09.005 Jiang, 2016, Sulfate radical-based oxidation of fluoroquinolone antibiotics: kinetics, mechanisms and effects of natural water matrices, Water Res., 106, 507, 10.1016/j.watres.2016.10.025 Lian, 2017, Kinetic study of hydroxyl and sulfate radical-mediated oxidation of pharmaceuticals in wastewater effluents, Environ. Sci. Technol., 51, 2954, 10.1021/acs.est.6b05536 Liu, 2015, TiO2/RGO composite aerogels with controllable and continuously tunable surface wettability for varied aqueous photocatalysis, Appl. Catal. B Environ., 174–175, 421, 10.1016/j.apcatb.2015.03.041 Liu, 2014, Hydrothermal synthesis of TiO2–RGO composites and their improved photocatalytic activity in visible light, RSC Adv., 4, 36040, 10.1039/C4RA06342B Lutze, 2015, Sulfate radical-based water treatment in presence of chloride: formation of chlorate, inter-conversion of sulfate radicals into hydroxyl radicals and influence of bicarbonate, Water Res., 72, 349, 10.1016/j.watres.2014.10.006 Piskunov, 2015, C-, N-, S-, and Fe-doped TiO2 and SrTiO3 nanotubes for visible-light-driven photocatalytic water splitting: prediction from first principles, J. Phys. Chem. C, 119, 18686, 10.1021/acs.jpcc.5b03691 Qi, 2017, Activation of peroxymonosulfate by microwave irradiation for degradation of organic contaminants, Chem. Eng. J., 315, 201, 10.1016/j.cej.2017.01.012 Qi, 2014, Degradation of sulfamethoxazole by microwave-activated persulfate: kinetics, mechanism and acute toxicity, Chem. Eng. J., 249, 6, 10.1016/j.cej.2014.03.086 Qi, 2017, Enhanced degradation of organic contaminants in water by peroxydisulfate coupled with bisulfite, J. Hazard. Mater., 328, 98, 10.1016/j.jhazmat.2017.01.010 Rbero, 2005, Photo-fenton degradation of diclofenac: identification of main intermediates and degradation pathway, Environ. Sci. Technol., 39, 8300, 10.1021/es050794n Rivas, 2010, Influence of oxygen and free radicals promoters on the UV-254 nm photolysis of diclofenac, Chem. Eng. J., 163, 35, 10.1016/j.cej.2010.07.027 Rizzo, 2009, Degradation of diclofenac by TiO2 photocatalysis: UV absorbance kinetics and process evaluation through a set of toxicity bioassays, Water Res., 43, 979, 10.1016/j.watres.2008.11.040 Safaei, 2016, Photocatalytic activity of nanohybrid Co-TCPP@TiO2/WO3 in aerobic oxidation of alcohols under visible light, J. Mater. Chem., 4, 3933, 10.1039/C5TA09357K Shi, 2016, Temperature-Mediated selective growth of MoS2/WS2 and WS2/MoS2 vertical stacks on Au foils for direct photocatalytic applications, Adv. Mater., 28, 10664, 10.1002/adma.201603174 Tong, 2012, Nano-photocatalytic materials: possibilities and challenges, Adv. Mater., 24, 229, 10.1002/adma.201102752 Tran, 2012, A cuprous oxide-reduced graphene oxide (Cu2O-rGO) composite photocatalyst for hydrogen generation: employing rGO as an electron acceptor to enhance the photocatalytic activity and stability of Cu2O, Nanoscale, 4, 3875, 10.1039/c2nr30881a Trapalis, 2016, TiO2/graphene composite photocatalysts for NOx removal: a comparison of surfactant-stabilized graphene and reduced graphene oxide, Appl. Catal. B Environ., 180, 637, 10.1016/j.apcatb.2015.07.009 Wahab, 2009, A computational study on the adsorption and ring cleavage of para- chlorophenol on anatase TiO2 surface, Surf. Sci., 603, 664, 10.1016/j.susc.2009.01.001 Wang, 2017, Facile synthesis of N-doped carbon dots/g-C3N4 photocatalyst with enhanced visible-light photocatalytic activity for the degradation of indomethacin, Appl. Catal. B Environ., 207, 103, 10.1016/j.apcatb.2017.02.024 Wang, 2013, One-step synthesis of easy-recycling TiO2 -rGO nanocomposite photocatalysts with enhanced photocatalytic activity, Appl. Catal. B Environ., 132–133, 452, 10.1016/j.apcatb.2012.12.009 Wang, 2017, BiVO4/TiO2(N2) nanotubes heterojunction photoanode for highly efficient photoelectrocatalytic applications, Nano-Micro Lett., 9, 14, 10.1007/s40820-016-0115-3 Wang, 2014, Oxidation of diclofenac by aqueous chlorine dioxide: identification of major disinfection byproducts and toxicity evaluation, Sci. Total Environ., 473–474, 437, 10.1016/j.scitotenv.2013.12.056 Wang, 2015, Oxidative removal of diclofenac by chlorine dioxide: reaction kinetics and mechanism, Chem. Eng. J., 279, 409, 10.1016/j.cej.2015.05.046 Werner, 2005, Environmental photodegradation of mefenamic acid, Chemosphere, 58, 1339, 10.1016/j.chemosphere.2004.10.004 Xia, 2017, High-performance BiVO4 photoanodes cocatalyzed with an ultrathin α-Fe2O3 layer for photoelectrochemical application, Appl. Catal. B Environ., 204, 127, 10.1016/j.apcatb.2016.11.015 Xia, 2018, BiVO4 photoanode with exposed(040) facets for enhanced photoelectrochemical performance, Nano-Micro Lett., 10, 11, 10.1007/s40820-017-0163-3 Yang, 2017, A novel visible-light-driven In-based MOF/graphene oxide composite photocatalyst with enhanced photocatalytic activity toward the degradation of amoxicillin, Appl. Catal. B Environ., 200, 673, 10.1016/j.apcatb.2016.07.057 Yu, 2015, Synergistic effect of dual electron-cocatalysts for enhanced photocatalytic activity: rGO as electron-transfer mediator and Fe(III) as oxygen-reduction active site, Sci. Rep., 5, 13083, 10.1038/srep13083 Yuan, 2011, Effects of chloride ion on degradation of Acid Orange 7 by sulfate radical-based advanced oxidation process: implications for formation of chlorinated aromatic compounds, J. Hazard. Mater., 196, 173, 10.1016/j.jhazmat.2011.09.007 Zhang, 2018, A photocatalytic degradation strategy of PPCPs by a heptazine-based CN organic polymer (OCN) under visible light, Environ. Sci. J. Integr. Environ. Res.: Nano, 5, 2325 Zhang, 2018, Degradation of indometacin by simulated sunlight activated CDs-loaded BiPO4 photocatalyst: roles of oxidative species, Appl. Catal. B Environ., 221, 129, 10.1016/j.apcatb.2017.09.008 Zhang, 2016, Kinetics and modeling of sulfonamide antibiotic degradation in wastewater and human urine by UV/H2O2 and UV/PDS, Water Res., 103, 283, 10.1016/j.watres.2016.07.037 Zucker, 2015, Influence of wastewater particles on ozone degradation of trace organic contaminants, Environ. Sci. Technol., 49, 301, 10.1021/es504314t