Trihalomethane (THM) formation from synergic disinfection of biologically treated municipal wastewater: Effect of ultraviolet (UV) irradiation and titanium dioxide photocatalysis on dissolve organic matter fractions

Meng, Yingjie; Wang, Yan; Han, Qi; Xue, Nan; Sun, Yangyang; Gao, Baoyu; Li, Qilin

doi:10.1016/j.cej.2016.05.141

Cited by 34 publications

(13 citation statements)

References 54 publications

(63 reference statements)

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“…One of the main interests of the photocatalytic oxidation is its efficiency in destroying harmful organic pollutants and their mineralization, which generally was evaluated in terms of dissolved organic carbon elimination (DOC) [40,41]. For this reason, in this study we focused our attention on the determination of the extent of mineralization of the target molecule under the considered photocatalytic process conditions.…”

Section: Effect Of Initial Pollutant Concentrationmentioning

confidence: 99%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreasing the initial substrate concentration. Target molecules oxidized faster when the catalyst load increased, and the mineralization was enhanced under acidic conditions: 92% of mineralization was achieved at pH 4 after 190 min of reaction. Radical quenching assays confirmed that HO• and ( h vb + ) were the reactive oxygen species involved in the photocatalytic oxidation of the considered pollutant. In addition, further results revealed that the removal efficiency decreased in real water matrices. Finally, data collected through a series of phytotoxicity tests demonstrated that the photocatalytic process considerably reduces the toxicity of the treated solutions, confirming the process’s effectiveness in the removal of persistent and biorefractory emergent organic water pollutants.

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Section: Effect Of Initial Pollutant Concentrationmentioning

confidence: 99%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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“…To avoid detector saturation, chlorination experiments were conducted in 500 mL headspace-free brown glass bottles in the dark at 25 ± 0.5°C with dissolved organic carbon (DOC) diluted to 2.0 mg/L and buffered at 7.0 ± 0.2 with 10 mM phosphate buffer. The chlorine dosage for each water sample was determined according to a preliminary demand test such that a final free chlorine residue of at least 1-2 mg/L remained after 72 h (Ma et al, 2013;Meng et al, 2016). After 72 h incubation, stoichiometric amounts of sodium sulfite were added to quench the disinfectant residuals, and the water samples were analyzed as soon as possible.…”

Section: Methodsmentioning

confidence: 99%

Effect of oxidation ditch and anaerobic-anoxic-oxic processes on CX3R-type disinfection by-product formation during wastewater treatment

Lin

Wang

Zhang

et al. 2021

Science of The Total Environment

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Biological treatment enhanced the formation of a series of DBPs, especially Br-DBPs. • Biological treatment reduced the DOC and UV 254 but increased the DON and SUVA. • Biological treatment increased the DON/ DOC ratio and bromide/DOC ratio. • SMP-and humic acid-like matters increased significantly after OD and AAO treatment. • High MW fractions were transformed into low MW fractions after OD and AAO processes.

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“…3D-EEM analysis was then applied to analyze the organic compounds present in the wastewater. The compounds were evaluated based on the position, shift, and intensity of each uorescence peak present in the obtained spectrum (Li et al 2016;Meng et al 2016). Figure 9 shows the 3D-EEM spectra of the untreated wastewater and wastewater samples after photo-Fenton treatment.…”

Section: Recyclability and Stability Of The Fgo Nanocompositesmentioning

confidence: 99%

Fe3O4 hollow nanospheres on graphene oxide as an efficient heterogeneous photo-Fenton catalyst for the advanced treatment of biotreated papermaking effluent

Peng

et al. 2021

Environ Sci Pollut Res

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This study focused on the feasibility of using Fe 3 O 4 /graphene oxide (FGO) nanocomposites as heterogeneous catalysts for the advanced treatment of real industrial wastewater. FGO nanocomposites with different graphene oxide (GO) ratios were synthesized by co-precipitating iron salts onto GO sheets in basic solution. Characterization of the resulting material structures and functionalities was performed using a range of analytical techniques. A low GO loading afforded a good Fe 3 O 4 nanoparticle dispersibility and resulted in a higher Brunauer-Emmett-Teller surface area and pore volume. The FGO nanocomposites and pure Fe 3 O 4 were used to treat papermaking wastewater in a heterogeneous photo-Fenton process. The results suggested that the nanocomposite designated FGO1 (GO loading of 25 mg) exhibits a higher photocatalytic e ciency than other FGO nanocomposites and pure Fe 3 O 4 . A maximum chemical oxygen demand degradation e ciency of 89.6% was achieved in 80 min with 1.5 g.L − 1 FGO1 at pH 3. The degradation of different pollutants present in wastewater was evaluated with the aid of gas chromatography-mass spectrometry and 3D excitation-emission-matrix analysis. Inductively coupled plasma atomic emission spectroscopy and magnetic measurements con rmed that the FGO1 nanocomposites possess a low iron leachability and a high reusability. Thus, a comprehensive advanced treatment of real industrial wastewater using a magnetic FGO catalyst is demonstrated.

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Trihalomethane (THM) formation from synergic disinfection of biologically treated municipal wastewater: Effect of ultraviolet (UV) irradiation and titanium dioxide photocatalysis on dissolve organic matter fractions

Cited by 34 publications

References 54 publications

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Effect of oxidation ditch and anaerobic-anoxic-oxic processes on CX3R-type disinfection by-product formation during wastewater treatment

Fe3O4 hollow nanospheres on graphene oxide as an efficient heterogeneous photo-Fenton catalyst for the advanced treatment of biotreated papermaking effluent

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