Oxalic Acid-Induced Photodissolution of Ferrihydrite and the Fate of Loaded As(V): Kinetics and Mechanism

The fate of arsenic in the water environment is of great concern. Here, the influences of oxalic acid and UV light illumination on the dissolution of naked ferrihydrite (Fhy), Fhy loaded with As(V) [Fhy*-As(V)], as well as the fate of As(V) at pH 3.0 were studied. With the assistance of oxalic acid, complexes of Fe(III)-oxalic acid produced on Fhy/Fhy*-As(V) were reduced to Fe(II)-oxalic acid by photo-induced electrons under UV light irradiation. UV light has nearly no impact on the release of As(V) in the system of Fhy*-As(V) without the assistance of oxalic acid. Nevertheless, in the existence of oxalic acid, UV light illumination resulted in the contents of liberated As(V) decreased by 775–1300% compared to that without light. Considering the coexistence of As(V), oxalic acid as well as iron oxides in aquatic environments, the present study revealed that UV illumination could enhance the retention of As(V) on Fhy in the acidic water environment containing oxalic acid.

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Invisible photonic prints shown by UV illumination: combining photoluminescent and noniridescent structural colors

Journal of Materials Chemistry C ◽

10.1039/c9tc03982a ◽

2019 ◽

Vol 7 (38) ◽

pp. 11776-11782 ◽

Cited By ~ 6

Author(s):

Dongpeng Yang ◽

Guolong Liao ◽

Shaoming Huang

Keyword(s):

Photonic Crystals ◽

Self Assembly ◽

Colloidal Particles ◽

Uv Light ◽

The Self ◽

Light Irradiation ◽

Structural Colors ◽

Uv Illumination ◽

Uv Light Irradiation

Invisible photonic prints that become visible by UV light irradiation were prepared via the self-assembly of Y2O3:Eu colloidal particles into amorphous photonic crystals (APCs) with controlled fluorescent and noniridescent structural colors.

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Benzothiazole heterogeneous photodegradation in nano α-Fe 2 O 3 /oxalate system under UV light irradiation

Royal Society Open Science ◽

10.1098/rsos.180322 ◽

2018 ◽

Vol 5 (6) ◽

pp. 180322 ◽

Cited By ~ 1

Author(s):

Xiangyun Han ◽

Xi Zhang ◽

Lei Zhang ◽

Mei Pan ◽

Jinlong Yan

Keyword(s):

Liquid Chromatography ◽

Oxalic Acid ◽

High Performance ◽

Uv Light ◽

Transformation Products ◽

Light Irradiation ◽

Order Kinetic ◽

Uv Light Irradiation ◽

Order Kinetic Model ◽

Set Up

The photodegradation of benzothiazole (BTH) in wastewater with the coexistence of iron oxides and oxalic acid under UV light irradiation was investigated. Results revealed that an effective heterogeneous photo-Fenton-like system could be set up for BTH abatement in wastewater under UV irradiation without additional H 2 O 2 , and 88.1% BTH was removed with the addition of 2.0 mmol l −1 oxalic acid and 0.2 g l −1 α-Fe 2 O 3 using a 500 W high-pressure mercury lamp (365 nm). The degradation of BTH in the photo-Fenton-like system followed the first-order kinetic model. The photoproduction of hydroxyl radicals (·OH) in different systems was determined by high-performance liquid chromatography. Identification of transformation products by using liquid chromatography coupled with high resolution tandem mass spectrometry provided information about six transformation products formed during the photodegradation of BTH. Further insight was obtained by monitoring concentrations of the sulfate ion ( SO 4 2 − ) and nitrate ion ( NO 3 − ) , which demonstrated that the intermediate products of BTH could be decomposed ultimately. Based on the results, the potential photodegradation pathway of BTH was also proposed.

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Wastewater Derived Dissolved Organic Nitrogen Removal using Integrated System of Biological Reactors and UV light Irradiation

Proceedings of the Water Environment Federation ◽

10.2175/193864716819713286 ◽

2016 ◽

Vol 2016 (9) ◽

pp. 4958-4968

Author(s):

Swati Sharma ◽

Donald L Tucker ◽

Halis Simsek

Keyword(s):

Nitrogen Removal ◽

Dissolved Organic Nitrogen ◽

Organic Nitrogen ◽

Uv Light ◽

Integrated System ◽

Light Irradiation ◽

Uv Light Irradiation

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Synthesis, characterization and photocatalytic activities of Al-doped ZnO for degradation of methyl orange dye under UV light irradiation

Journal of the Australian Ceramic Society ◽

10.1007/s41779-020-00541-6 ◽

2021 ◽

Author(s):

Hartini Ahmad Rafaie ◽

Nur Aliyah Alwani Mohd Nazam ◽

Nurul Infaza Talalah Ramli ◽

Ruziana Mohamed ◽

Muhd Firdaus Kasim

Keyword(s):

Methyl Orange ◽

Uv Light ◽

Light Irradiation ◽

Uv Light Irradiation ◽

Photocatalytic Activities ◽

Methyl Orange Dye ◽

Doped Zno ◽

Degradation Of Methyl Orange

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TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽

10.3390/w13121622 ◽

2021 ◽

Vol 13 (12) ◽

pp. 1622

Author(s):

Xiao-Pin Guo ◽

Peng Zang ◽

Yong-Mei Li ◽

Dong-Su Bi

Keyword(s):

Activated Carbon ◽

Natural Organic Matter ◽

Uv Light ◽

Sol Gel ◽

Light Irradiation ◽

Nano Tio2 ◽

Uv Light Irradiation ◽

Adsorption Capacities ◽

Taste And Odor ◽

Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

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Photocatalytic performance of Cu-doped titania thin films under UV light irradiation

Applied Surface Science ◽

10.1016/j.apsusc.2021.149535 ◽

2021 ◽

Vol 553 ◽

pp. 149535

Author(s):

Elisa Moretti ◽

Elti Cattaruzza ◽

Cristina Flora ◽

Aldo Talon ◽

Eugenio Casini ◽

...

Keyword(s):

Thin Films ◽

Photocatalytic Performance ◽

Uv Light ◽

Light Irradiation ◽

Uv Light Irradiation ◽

Doped Titania

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Hydrolysis of Protein modified with UV Light Irradiation by Proteases

Nippon Nōgeikagaku Kaishi ◽

10.1271/nogeikagaku1924.34.142 ◽

1960 ◽

Vol 34 (2) ◽

pp. 142-145

Author(s):

Mitsuo KOSHIKA ◽

Yataro OBATA

Keyword(s):

Uv Light ◽

Light Irradiation ◽

Uv Light Irradiation ◽

Hydrolysis Of

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Amino acid-templated zinc phosphites: low-dimensional structures, fluorescence, and nonlinear optical properties

Dalton Transactions ◽

10.1039/d1dt00939g ◽

2021 ◽

Author(s):

Yumei Mao ◽

Xuehua Dong ◽

Yuandan Deng ◽

Jing Li ◽

Ling Huang ◽

...

Keyword(s):

Optical Properties ◽

Amino Acid ◽

Nonlinear Optical ◽

Uv Light ◽

Nonlinear Optical Properties ◽

Light Irradiation ◽

Blue Fluorescence ◽

Structure Directing Agent ◽

Uv Light Irradiation ◽

Low Dimensional

Two new zinc phosphites were prepared using the amino acid alanine as structure-directing agent. They have tubular and ladder-like structures exhibiting blue fluorescence upon UV light irradiation. Notably, the tubular...

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