Degradation of the herbicide isoproturon by a photocatalytic process

Thomas, Sébastien; Alatrache, A.; Pons, Marie‐Noëlle; Zahraa, Orfan

doi:10.1016/j.crci.2014.04.002

Cited by 12 publications

(3 citation statements)

References 22 publications

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“…Photocatalysis is one of the AOPs, which allows the degradation of a wide variety of organic pollutants at low concentrations. [71][72][73][74] Accordingly, the coupling plasma followed by photocatalysis processes is proposed. Thus, solutions of levofloxacin at different concentrations were treated by photocatalysis using 20 mg of Degussa TiO 2 -P25 as photocatalyst.…”

Section: Coupling Photocatalysis and Plasma Treatment Processesmentioning

confidence: 99%

Gliding arc plasma treatment of levofloxacin using experimental design approach

Trifi¹,

Trifi

Kouass³

et al. 2023

CLEAN Soil Air Water

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The degradation of levofloxacin, a pharmaceutical pollutant model has been studied by gliding arc plasma (Glidarc). In this work, a full factorial design was applied to investigate the influence of the operating parameters and their interactions on the degradation yield. This experimental design demonstrates that the electrode-solution distance is the most influential factor followed by the concentration of levofloxacin and the applied voltage. Response surface methodology using Doehlert design was adopted to predict the optimal conditions of the plasma treatment. Results showed that for an applied voltage of 7.2 kV, an electrode-solution distance of 2.7 cm, and an initial concentration of 45.6 mg L −1 , the degradation yield reached 52.81 ± 1.19% after 90 min of plasma treatment, which corresponds to an energy yield of 40.1 mg kW −1 h −1 .In addition, to develop a cost-effective system for the degradation of pharmaceutical pollutants, biodegradability of the plasma pretreated solutions was evaluated. Resultsshowed that a readily biodegradable solution was obtained after only 30 min of plasma pretreatment. Hence, the feasibility and the efficiency of coupling plasma to biodegradation processes were confirmed. Moreover, coupling plasma to photocatalysis was carried out and results showed that 45 min of plasma treatment followed by 40 min of photocatalytic treatment achieved 100% degradation that neither the plasma process nor the photocatalysis process can reach alone.

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Section: Coupling Photocatalysis and Plasma Treatment Processesmentioning

confidence: 99%

Gliding arc plasma treatment of levofloxacin using experimental design approach

Trifi¹,

Trifi

Kouass³

et al. 2023

CLEAN Soil Air Water

Self Cite

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“…Depending on the mode of operation, different types of photocatalytic reactors are available such as batch reactor or continuous reactor or recirculation mode of reactor (Thomas et al., 2014). The design of the reactor also plays an important role in deciding the final efficacy of the treatment.…”

Section: Reactors Used For Cavitation and Photocatalysismentioning

confidence: 99%

Degradation of pesticides using hybrid processes based on cavitation and photocatalysis: A review

Bagal,

Nandgawle,

Thosar

et al. 2023

Environmental Quality Mgmt

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The production of pesticides and its subsequent consumption in agricultural fields have increased significantly also resulting in environmental concerns. The current review discusses the different aspects of two emerging techniques as cavitation and photocatalysis that can be effectively applied for the degradation of toxic pesticides. Governing mechanisms for the degradation have been presented followed by discussion on the effect of different parameters on the extent of degradation, also presenting guidelines for optimum selection. It has been also demonstrated that the obtained degradation can be synergistically intensified by using combined techniques with complimentary mechanisms. The discussion clearly revealed that cavitation and photocatalysis have great potential to degrade pesticides efficiently. Overall, it was demonstrated that combined technique under the optimized set of operating conditions is energy‐efficient, cost‐effective and promising technique for pesticide degradation.

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“…with c the mass concentration of the starting organic compound after UV irradiation at time t, c0 the initial mass concentration, and k the "degradation rate coefficient" in s -1 [57,[60][61][62][63][64][65][66].…”

Section: Introductionmentioning

confidence: 99%

Degradation kinetics of isoproturon and its subsequent products in contact with TiO2 functionalized silica nanofibers

Loccufier

Deventer

Manhaeghe

et al. 2020

Chemical Engineering Journal

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A challenge for the photodegradation of (organic) micro-pollutants in waste water treatment is the mechanistic and kinetic understanding beyond the degradation of the initial (parent) harmful product, e.g. the phenylurea herbicide isoproturon (IPU). By combining liquid chromatography mass spectrometry and kinetic Monte Carlo modeling, we demonstrate that upon optimizing the dip-coating conditions (0.34 mol L -1 TiO2 solution at a coating speed of 160 mm min -1 ) for the functionalization of a superhydrophilic electrospun silica nanofibrous membrane (i) hydroxylation is a dominant reaction pathway and (ii) once IPU reacts on the surface of the TiO2 nanoparticles, further hydroxylation occurs sufficiently fast, with complete IPU removal under the detection limit (5-10 mg Lsolution -1 ) as a result of UV irradiation within 8 hours. As hydroxylation is dominant, degradation intermediates with a higher water solubility are formed and therefore a decreased toxicity is obtained upon reintroducing the treated solution into the environment. This is confirmed by respirometry, with an increase in the oxygen uptake rate of an activated sludge from 5.9 mg O2 gactivated sludge -1 h -1 for an untreated 10 mg L -1 IPU solution to 8.2 mg O2 gactivated sludge -1 h -1 for a solution irradiated for 8 hours, in line with a blank solution.

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Degradation of the herbicide isoproturon by a photocatalytic process

Cited by 12 publications

References 22 publications

Gliding arc plasma treatment of levofloxacin using experimental design approach

Gliding arc plasma treatment of levofloxacin using experimental design approach

Degradation of pesticides using hybrid processes based on cavitation and photocatalysis: A review

Degradation kinetics of isoproturon and its subsequent products in contact with TiO2 functionalized silica nanofibers

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