Challenges and effectiveness of nanotechnology-based photocatalysis for pesticides-contaminated water: A review

Kajitvichyanukul, Puangrat; Nguyen, Van‐Huy; Boonupara, Thirasant; Thi, Lan‐Anh Phan; Watcharenwong, Apichon; Sumitsawan, Sulak; Udomkun, Patchimaporn

doi:10.1016/j.envres.2022.113336

Cited by 30 publications

(13 citation statements)

References 151 publications

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“…For the static experiments, the glass screw-cap tubes were stowed in a tube holder, whereas for the dynamic experiments, the glass screw-cap tubes were placed in a typical rotator (Selecta, Agitador orbit), which was revolving at 12 rpm in order to maintain a thorough mixing of the quartz sand and the TM suspension. At preselected times (5,15,30,45,60,90,120,150,180, and 240 min), one screw-cap tube was taken at random from each of the two groups (static and dynamic). Subsequently, the collected samples were centrifuged at 30,000 rpm for 10 min in a microcentrifuge to settle any possible suspended particles.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, nanoparticles and carbon-based adsorbents are known to exhibit high efficiency in removing pesticides from aqueous systems [29]. To the best of our knowledge, although various procedures for pesticide removal using nanoparticles have been proposed in the past [30,31], the use of TiO 2 nanoparticles for TM removal under different pH and ionic strength conditions has not been previously examined. The present study focuses mainly on the effect of TiO 2 nanoparticles on the removal of the TM pesticide in water-saturated porous media and explores the behavior of TiO 2 and pesticide cotransport.…”

Section: Introductionmentioning

confidence: 99%

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Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

Stefanarou

Katzourakis

et al. 2023

Water

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Human activities in modern life are contributing significantly to global environmental pollution. With the need for clean drinking water ever increasing, so does the need to find new water-cleaning technologies. The ability of nanoparticles (NPs) to remove persistent pollutants from aqueous solutions makes them very important for use in water treatment technology. Titanium dioxide (TiO2) is recognized as an NP with unique optical, thermal, electrical, and magnetic properties and is widely used as an adsorbent material. Due to the extensive use of pesticides, their removal from the aquatic environment has gained widespread attention from the scientific community. In the present work, the transport of pesticide thiophanate methyl (TM), as well as the cotransport of TM and TiO2 nanoparticles, in a water-saturated column packed with quartz sand under various water conditions were investigated. Several ionic strengths (1, 10, 50, and 100 mM) and pH values (3, 5, 7, and 10) were examined. The results from the transport experiments were fitted and analyzed with the use of the ColloidFit software, while the results from the cotransport experiments were fitted with a modified version of a recently developed mathematical cotransport model. The results of this study suggested that the lowest mass recovery rate was for the cotransport experiments with the addition of NaCl. Furthermore, it was shown that TM has a weak affinity for sand but a relatively strong affinity for TiO2 at high ionic strength and acidic pH, probably accounting for the reduced mass recovery of TM in cotransport experiments.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

Stefanarou

Katzourakis

et al. 2023

Water

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“…Review papers focusing on various aspects of photocatalysis have been published by Castilla-Caballero et al (2022), Liu et al (2022a), Wang et al (2022), and Kajitvichyanukul et al (2022). The authors' goals of the review papers were concentrated on waste plastic mitigation using solid-state photocatalysis (Castilla-Caballero et al 2022), sewage treatment by coupling photocatalysis with biological processes (Liu et al 2022a), modification strategies for heterogeneous photocatalysis used for environmental remediation (Wang et al 2022), and constraints in the applications of photocatalysis for the treatment of pesticides-contaminated wastewater (Kajitvichyanukul et al 2022). The present study aims to further contribute to the existing review papers by analysing the various application of photocatalysis processes for the removal of organic pollutants from wastewater using TiO 2-based photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

The photocatalytic process in the treatment of polluted water

2022

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Wastewaters often contain toxic organic pollutants with a possible adverse effect on human health and aquatic life upon exposure. Persistent organic pollutants such as dyes and pesticides, pharmaceuticals, and other chemicals are gaining extensive attention. Water treatment utilizing photocatalysis has recently received a lot of interest. Photocatalysis is cutting-edge, alternative technology. It has various advantages, including functioning at normal temperatures and atmospheric pressure, cheap prices, no secondary waste creation, and being readily available and easily accessible. This review presented a comprehensive overview of the advances in the application of the photocatalytic process in the treatment of highly polluted industrial wastewater. The analysis of various literature revealed that TiO 2 -based photocatalysts are highly effective in degrading organic pollutants from wastewater compared to other forms of wastewater treatment technologies. The electrical structure of a semiconductor plays a vital role in the photocatalyst's mechanism. The morphology of a photocatalyst is determined by the synthesis method, chemical content, and technical characteristics. The scaled-up of the photoreactors will significantly help in curbing the effect of organic pollutants in wastewater.

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“…These electrons and holes, which are produced on the catalyst's surface, can then undergo reduction and oxidation processes to react with pollutants and effectively eliminate them 9 . Photocatalysis has attracted significant attention from researchers because of its ease of operation, high removal efficiency and environmental friendliness 13 . As a promising semiconductor, TiO 2 exhibits high catalytic activity, stable chemical properties and affordability, making it the most commonly used photocatalytic material in recent years 14 .…”

Section: Introductionmentioning

confidence: 99%

“…9 Photocatalysis has attracted significant attention from researchers because of its ease of operation, high removal efficiency and environmental friendliness. 13 As a promising semiconductor, TiO 2 exhibits high catalytic activity, stable chemical properties and affordability, making it the most commonly used photocatalytic material in recent years. 14 However, the limited quantum yield and utilization of visible light significantly hinder the photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Indirect Z‐scheme TiO₂/BC/g‐C₃N₄ for efficient photocatalytic reduction of Cr(VI) in aqueous solution

Chen,

Wang,

Dai

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDNowadays, there is an increasing concern regarding the rising issue of Cr(VI) pollution in aqueous solutions. It is crucial to find an effective technology for the removal of Cr(VI) in aqueous solutions. In this work, a novel TiO2/BC/g‐C3N4 heterostructure photocatalyst was successfully prepared by a simple hydrothermal method and characterized by SEM, TEM, XRD, BET, FT‐IR, PL, UV‐vis DRS, and XPS analysis. The photocatalytic reduction behavior of Cr(VI) on the TiO2/BC/g‐C3N4 heterostructure was investigated under visible light irradiation, and the possible mechanism of photocatalytic reduction of Cr(VI) was elucidated.RESULTSThe TiO2/BC/g‐C3N4 heterostructure photocatalyst exhibited better photo‐reduction activity for Cr(VI) under visible light irradiation. After 100 minutes irradiation with visible light, the TiO2/BC/g‐C3N4 photocatalyst achieved a removal efficiency of 89% for Cr(VI). Compared with TiO2, TiO2/BC, and TiO2/g‐C3N4, the photocatalytic removal efficiency of Cr(VI) on the TiO2/BC/g‐C3N4 increase by 40%, 20%, and 10% respectively. The photocatalytic reduction of Cr(VI) was depened on the initial concentration of Cr(VI), catalyst dosage, pH value, and atmosphere. Moreover, the TiO2/BC/g‐C3N4 presented excellent stability and reusability after five cycles.CONCLUSIONThe TiO2/BC/g‐C3N4 heterojunction enables highly efficient photocatalytic reduction of Cr(VI) under visible light irradiation. This enhancement is primarily attributed to the construction of an indirect Z‐scheme TiO2/BC/g‐C3N4 heterojunction, which significantly improves the separation efficiency of photo‐ generated charge carriers during the photochemical process. Furthermore, the presence of BC enhances the adsorption performance of Cr(VI) on the TiO2/BC/g‐C3N4, thereby facilitating its photocatalytic reduction.This article is protected by copyright. All rights reserved.

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Challenges and effectiveness of nanotechnology-based photocatalysis for pesticides-contaminated water: A review

Cited by 30 publications

References 151 publications

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

The photocatalytic process in the treatment of polluted water

Indirect Z‐scheme TiO₂/BC/g‐C₃N₄ for efficient photocatalytic reduction of Cr(VI) in aqueous solution

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Challenges and effectiveness of nanotechnology-based photocatalysis for pesticides-contaminated water: A review

Cited by 30 publications

References 151 publications

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

The photocatalytic process in the treatment of polluted water

Indirect Z‐scheme TiO2/BC/g‐C3N4 for efficient photocatalytic reduction of Cr(VI) in aqueous solution

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Product

Resources

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Indirect Z‐scheme TiO₂/BC/g‐C₃N₄ for efficient photocatalytic reduction of Cr(VI) in aqueous solution