Photocatalytic oxidation of DBP precursors using UV with suspended and fixed TiO2

Kent, Fraser C.; Montreuil, Krysta R.; Brookman, Ryan M.; Sanderson, R. J.; Dahn, J. R.; Gagnon, Graham A.

doi:10.1016/j.watres.2011.09.013

Cited by 25 publications

(12 citation statements)

References 20 publications

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“…This result was also consistent with the work of Liu using higher TiO 2 doses [29]. In contrast, TiO 2 concentration was quite low in this study, so the potential adsorption of organic onto TiO 2 surface could be ignored [21]. Fig.…”

Section: Effect Of Ph On Tio 2 Photocatalysis and Thms Formationsupporting

confidence: 92%

“…These results indicated that UV and UV/TiO 2 process could degrade polycyclic aromatic hydrocarbon into intermediates but play less roles in mineralization of DOC compounds [28]. This was consistent with former research investigating photocatalytic oxidation of DBPs precursors in surface water using UV with TiO 2 in low dose [21]. A high degree of removal of THMs precursor compounds was also achieved using higher TiO 2 doses [29].…”

Section: Comparison Of Dom Properties After Uv and Uv/ Tio 2 Treatmentsupporting

confidence: 89%

“…trichloroethylene, THMs, pesticides, and polychlorinated biphenyls) into nontoxic compounds [20]. Kent and Montreuil used UV/TiO 2 treatment to induce photocatalytic oxidation of DBP precursors in surface water, and the results indicated that the formation of THMs and HAAs was greatly reduced [21].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…It is well known that DBPs formation during chlorination after UV and UV/TiO 2 treatment in drinking water and surface water can be well explained [21,22]. However, the mechanism of DBPs formation in UV/ TiO 2 of reclaimed water was still unclear, and a further investigation was required.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

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Photocatalysis of THM precursors in reclaimed water: the application of TiO2 in UV irradiation

Han

Wang

Yan

et al. 2016

Desalination and Water Treatment

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A B S T R A C TIn this study, ultraviolet (UV) irradiation followed by chlorination was employed for reclaimed water disinfection. In order to reduce trihalomethanes (THMs) from reclaimed water, suspended TiO 2 (10 mg/L) was added as photocatalyst in UV process to enhance the removal of THM precursors. Reduction of UV absorbance in 254 nm (UV 254 ), dissolved organic carbon (DOC), and THMs formation was analyzed under different experimental conditions (exposure time, pH, TiO 2 doses, and TiO 2 forms). Excitation-emission matrix spectra technology was also used to investigate the changes of dissolved organic matters properties during UV and UV-TiO 2 process. Expansion of irradiation time resulted in a remarkable decrease in UV 254 and THM yields, but showed few influence on DOC removal. THMs yield decreased more than 50% with pH increased from 5 to 9 and rise in TiO 2 dosage also presented a positive effect on photocatalytic disinfection. In addition, a dramatic increase in removal rates of UV 254 , DOC, and THMs was observed when TiO 2 doses were increased from 3 to 15 mg/L. In terms of TiO 2 form, suspended TiO 2 exhibited a better removal capacity on UV 254 , DOC, and THMs by contrast with TiO 2 coated on granular active carbon.

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Section: Effect Of Ph On Tio 2 Photocatalysis and Thms Formationsupporting

confidence: 92%

Section: Comparison Of Dom Properties After Uv and Uv/ Tio 2 Treatmentsupporting

confidence: 89%

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Section: Desalination and Water Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

Photocatalysis of THM precursors in reclaimed water: the application of TiO2 in UV irradiation

Han

Wang

Yan

et al. 2016

Desalination and Water Treatment

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“…The hydrophilic and transphilic fractions were less decomposed because the existing amino, carboxyl and alcoholic hydroxyl groups are relatively difficult to be decomposed upon photoelectrocatalysis technique. Photocatalytic oxidation by means of UV/TiO2 (λ = 254 nm; suspended TiO2 and nano-structured thin film support coated with 300 nm of TiO2) was also employed by Kent et al (2011) to enhance the water treatment efficiency (French River water, Canada). The results were that treatment with UV/suspended TiO2 did not improve substantially the removal of THMs (only 20% decrease), but was rather efficient in the elimination of total HAAs even at low TiO2 concentration (88% decrease).…”

Section: Pretreatmentmentioning

confidence: 99%

New Trends in Disinfection By-Products Formation upon Water Treatment

Boucherit¹,

Moulay²,

Ghernaout³

et al. 2015

CHEM

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This review paper deals with the formation of disinfection by-products (DBPs). Water basin remains a wonderful chemical reactor that allows the occurrence of intricate secondary disinfection chemical reactions, forming several hundreds of DBPs at the same time with microorganisms killing. The kinetics of DBPs formation is tightly dependent on water physicochemical characteristics such as temperature, hydrophobic/hydrophilic fractions in natural organic matter (NOM), pH, and pretreatment. Reducing DBPs levels in drinking water is not a relevant measure as the newly-developed analytical techniques and the health-related research reveal that the tolerable DBPs' levels must be further decreased and would be detected at ng L-1 instead of μg L-1 scale. Furthermore, because of the fact that man is being exposed to DBPs concentrations in drinking water in his lifetime, there will be a cumulative effect of these toxic chemical products even at their more reduced concentrations. Hence, the removal of these chemical products is sought for and is considered a real challenge and the main objective of water treatment technology for mankind survival.

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Cleanup and Pollution with Nanoparticles: Environmental Dilemma

Sefiloglu

Balcıoğlu

2021

Nanotechnology in the Life Sciences

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Photocatalytic oxidation of DBP precursors using UV with suspended and fixed TiO2

Cited by 25 publications

References 20 publications

Photocatalysis of THM precursors in reclaimed water: the application of TiO2 in UV irradiation

Photocatalysis of THM precursors in reclaimed water: the application of TiO2 in UV irradiation

New Trends in Disinfection By-Products Formation upon Water Treatment

Cleanup and Pollution with Nanoparticles: Environmental Dilemma

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