Enhanced photocatalytic degradation of sulfamethoxazole by visible-light-sensitive TiO2 with low Cu addition

Chiang, Li-Fen; Doong, Ruey‐an

doi:10.1016/j.seppur.2015.10.011

Cited by 41 publications

(13 citation statements)

References 38 publications

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“…SMX has already been used to test the efficiency of a sunlight mediated process with titanium dioxide modified for instance with tungsten (WO 3 /TiO 2 ) [29], copper (Cu/TiO 2 ) [30,31], gold (Au/TiO 2 ), and silver (Ag/TiO 2 ) [31]. For this purpose also non-TiO 2 based catalysts were investigated, such as flower-like bismuth oxide (Bi 2 O 3 ) [32], cuprous oxide-reduced graphene oxide (Cu 2 O/rGO) [33], composites of silver orthophosphate with tungsten oxide (Ag 3 PO 4 /WO 3 ), [34] and many others.…”

Section: Sulfamethoxazole (Smx)mentioning

confidence: 99%

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

et al. 2019

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Application of solar photocatalysis for water treatment is intensively studied. In this work, we investigated TiO2 modified with platinum (Pt/TiO2) and palladium (Pd/TiO2) using sulfamethoxazole (SMX) as the model contaminant. We considered the following parameters: (i) level of TiO2 modification with Pt/Pd, (ii) initial concentration of photocatalysts, (iii) geographic location where processes were conducted, and (iv) natural water matrix. The catalysts characterized by SEM, EDX, DRS, and XRD techniques showed successful deposition of Pd and Pt atoms on TiO2 surface that enabled light absorption in the visible (Vis) range, and therefore caused efficient SMX removal in all tested conditions. A comparison of the rate constants of SMX degradation in various conditions revealed that modification with Pd gave better results than modification with Pt, which was explained by the better optical properties of Pd/TiO2. The removal of SMX was higher with Pd/TiO2 than with Pt/TiO2, independent of the modification level. In the experiments with the same modification level, similar rate constants were achieved when four times the lower concentration of Pd/TiO2 was used as compared with Pt/TiO2. Formation of four SMX transformation products was confirmed, in which both amine groups are involved in photocatalytic oxidation. No toxic effect of post-reaction solutions towards Lepidium sativum was observed.

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Section: Sulfamethoxazole (Smx)mentioning

confidence: 99%

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

et al. 2019

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“…Several studies have depicted that the photocatalytic degradation is a surface-mediated reaction and the photocatalytic efficiency and rate is highly dependent on the active sites onto the photocatalyst. 8,31,43,44 Therefore, the Langmuir-Hinshelwood kinetics can be employed to describe the relationship (eqn (1)). Fig.…”

Section: Effect Of Light Source On Photocatalytic Activity Of Znfe 2 mentioning

confidence: 99%

“…The slight decrease in k obs is attributed to the accumulation of inter mediates aer photocatalytic degradation of BPA and loss of the trace amount of photocatalyst during separation. [44][45][46][47] In addition, the released aqueous concentrations of Zn and Fe aer 10 cycles are 32 and 21 mg L À1 , respectively, which are far lower than the standards of Zn (5 mg L À1 ) and Fe (0.3 mg L À1 ) in drinking water. These results indicate that ZnFe 2 O 4 -TiO 2 is an environmentally friendly and stable photocatalyst, which can maintain the highly recyclable photoactivity under visible light irradiation conditions.…”

Section: Stability and Reusability Of Znfe 2 O 4 -Tiomentioning

confidence: 99%

Heterostructured ZnFe₂O₄/TiO₂ nanocomposites with a highly recyclable visible-light-response for bisphenol A degradation

Nguyen

Doong

2017

RSC Adv.

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“…Although past studies demonstrate that sulfamethoxazole is biodegraded in sewage, these processes are typically too slow to ensure complete elimination of sulfonamides from wastewater effluent. In order to restore water quality, removal of sulfamethoxazole is essential to avoid further pollution of the environment and to enable safe reuse of such water . Unfortunately, sulfamethoxazole cannot be removed efficiently by conventional sewage treatment .…”

Section: Introductionmentioning

confidence: 99%

Combination of enzymatic degradation by chloroperoxidase with activated sludge treatment to remove sulfamethoxazole: performance, and eco-toxicity assessment

Xiao

Jiang

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND Sulfamethoxazole is found in surface and ground waters because it is usually not metabolized and simply passes through the human body after ingestion. This drug is difficult to degrade by conventional treatments and may cause environmental concerns. RESULTS A rapid and efficient enzymatic degradation of sulfamethoxazole by a heme peroxidase, chloroperoxidase (CPO), was investigated in this work. The degradation efficiency of sulfamethoxazole reached 98.64% within 20 min at room temperature, atmospheric pressure and environment‐friendly reaction conditions with an enzyme concentration of approximately 10−9 mol L−1. High performance liquid chromatography–mass spectrometry analysis was employed to identify the intermediates and final products. Moreover, chemical oxygen demand (COD) measurements showed that pre‐treatment by CPO‐H2O2 oxidative degradation followed by existing bioremediation technologies can effectively improve the efficiency and thoroughness of decontaminating this drug from wastewater. The degradation efficiency was enhanced from 76.5% to 84.47%, and the COD removal increased from 29.72% to 51.32%. The eco‐toxicity test using a green algae, Chlorella pyrenoidos, showed that the degraded products had lower toxicity than the parent drug. CONCLUSION CPO catalyzed oxidative degradation is a promising alternative for treatment of wastewater containing sulfonamide drugs. This enzymatic method is also suitable for treatment of other sulfonamide antibiotics. © 2016 Society of Chemical Industry

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Enhanced photocatalytic degradation of sulfamethoxazole by visible-light-sensitive TiO2 with low Cu addition

Cited by 41 publications

References 38 publications

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

Heterostructured ZnFe₂O₄/TiO₂ nanocomposites with a highly recyclable visible-light-response for bisphenol A degradation

Combination of enzymatic degradation by chloroperoxidase with activated sludge treatment to remove sulfamethoxazole: performance, and eco-toxicity assessment

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Enhanced photocatalytic degradation of sulfamethoxazole by visible-light-sensitive TiO2 with low Cu addition

Cited by 41 publications

References 38 publications

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

Solar Photocatalytic Degradation of Sulfamethoxazole by TiO2 Modified with Noble Metals

Heterostructured ZnFe2O4/TiO2 nanocomposites with a highly recyclable visible-light-response for bisphenol A degradation

Combination of enzymatic degradation by chloroperoxidase with activated sludge treatment to remove sulfamethoxazole: performance, and eco-toxicity assessment

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Product

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Heterostructured ZnFe₂O₄/TiO₂ nanocomposites with a highly recyclable visible-light-response for bisphenol A degradation