Light-driven breakdown of microcystin-LR in water: A critical review

Xie, Guangyu; Hu, Xinjiang; Du, Yuxuan; Qi, Jin; Liu, Yan; Tang, Chunfang; Li, Guoyu; Chen, Zhifen; Zhou, Daixi; Wang, Hui

doi:10.1016/j.cej.2021.129244

Cited by 37 publications

(11 citation statements)

References 224 publications

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“…Still more studies would be useful to confirm the efficacy of these approaches against other cyanotoxins and their applicability in full-scale operations. Other light-driven oxidation technologies for MC-LR degradation in water have been reviewed elsewhere [200].…”

Section: Chemical and Physical Approachesmentioning

confidence: 99%

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

Abdallah

Hassel

Andjelković

et al. 2021

Toxins

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Cyanotoxins have gained global public interest due to their potential to bioaccumulate in food, which threatens human health. Bloom formation is usually enhanced under Mediterranean, subtropical and tropical climates which are the dominant climate types in developing countries. In this context, we present an up-to-date overview of cyanotoxins (types, toxic effects, analysis, occurrence, and mitigation) with a special focus on their contamination in (sea)food from all the developing countries in Africa, Asia, and Latin America as this has received less attention. A total of 65 publications have been found (from 2000 until October 2021) reporting the contamination by one or more cyanotoxins in seafood and edible plants (five papers). Only Brazil and China conducted more research on cyanotoxin contamination in food in comparison to other countries. The majority of research focused on the detection of microcystins using different analytical methods. The detected levels mostly surpassed the provisional tolerable daily intake limit set by the World Health Organization, indicating a real risk to the exposed population. Assessment of cyanotoxin contamination in foods from developing countries still requires further investigations by conducting more survey studies, especially the simultaneous detection of multiple categories of cyanotoxins in food.

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Section: Chemical and Physical Approachesmentioning

confidence: 99%

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

Abdallah

Hassel

Andjelković

et al. 2021

Toxins

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“…In order to effectively eliminate organic pollutants from water, many researchers have explored a wide range of wastewater treatment technologies, such as physical adsorption [ 13 ], microbial degradation [ 14 ], electrochemical methods [ 15 ], and photocatalytic degradation [ 16 , 17 ]. However, physical adsorption only transfers organic pollutants from the aqueous phase to other phases without mineralizing them [ 18 ]; microbial degradation is limited by the high chemical stability of organic matter and its strong bactericidal ability [ 14 ]; and electrochemical methods can effectively mineralize organic matter but require continuous power input, leading to increased energy consumption and costs [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

In Situ Coupling Carbon Defective C3N5 Nanosheet with Ag2CO3 for Effective Degradation of Methylene Blue and Tetracycline Hydrochloride

Zeng

Chen

et al. 2022

Nanomaterials

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The development of novel catalysts for degrading organic contaminants in water is a current hot topic in photocatalysis research for environmental protection. In this study, C3N5 nanosheet/Ag2CO3 nanocomposites (CNAC-X) were used as efficient photocatalysts for the visible-light-driven degradation of methylene blue (MB), and tetracycline hydrochloride (TC-HCl) was synthesized for the first time using a simple thermal oxidative exfoliation and in situ deposition method. Due to the synergistic effect of nanosheet structures, carbon defects, and Z-scheme heterojunctions, CNAC-10 exhibited the highest photocatalytic activity, with photodegradation efficiencies of 96.5% and 97.6% for MB (60 mg/L) and TC-HCl (50 mg/L) within 90 and 100 min, respectively. The radical trapping experiments showed that ·O2− and h+ played major roles in the photocatalytic effect of the CNAC-10 system. Furthermore, intermediates in the photodegradation of MB and TC-HCl were investigated to determine possible mineralization pathways. The results indicated that C3N5 nanosheet/Ag2CO3 photocatalysts prepared in this work could provide an effective reference for the treatment of organic wastewater.

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“…To investigate the mineralization mode of MC-LR in the photocatalytic reaction system by 2% α-Fe 2 O 3 /TDCN composites, LC−MS was used to identify the intermediate products and to explore the possible pathways for the catalytic decomposition of MC-LR. Based on the test data of LC−MS (Table S12), combined with other scholars' studies on the degradation pathways of MC-LR, 2 the degradation modes of MC-LR were classified into two categories (Figure S17a,b), and the possible degradation mechanisms were proposed. MC-LR, represented by m/z = 995.6, is a 3D structure consisting of a rectangular planar macrocyclic ring and an Adda side chain perpendicular to the plane of the macrocyclic ring.…”

Section: Possible Degradation Pathway Of Mc-lrmentioning

confidence: 99%

Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂

Zhong,

Ji,

Yang

et al. 2024

ACS Catal.

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Microcystin-LR (MC-LR) is susceptible to degradation by singlet oxygen ( 1 O 2 ) attack due to multiple unsaturated olefinic bond sites. In this study, the Z-scheme heterojunction α-Fe 2 O 3 /tubular g-C 3 N 4 with C defects (α-Fe 2 O 3 /TDCN) was synthesized via hydrothermal and cocalcination methods. The efficient generation of 1 O 2 was realized by enhancing the photogenerated carrier separation and oxygen adsorption capabilities and was used to investigate the degradation process and mechanism of MC-LR. The results show that the degradation rate of MC-LR can reach nearly 100% within 60 min under visible light irradiation, and α-Fe 2 O 3 /TDCN possesses good stability and environmental friendliness. The relationship between photocatalyst performance and 1 O 2 generation was analyzed by density functional theory (DFT) calculations. Based on probe experiments, LC−MS data, and DFT calculations, the mineralization process of MC-LR dominated by 1 O 2 was analyzed. This study provides a reference for addressing MC-LR pollution in eutrophic aquatic environments and the direction of specific control of MC-LR mineralization.

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Light-driven breakdown of microcystin-LR in water: A critical review

Cited by 37 publications

References 224 publications

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

In Situ Coupling Carbon Defective C3N5 Nanosheet with Ag2CO3 for Effective Degradation of Methylene Blue and Tetracycline Hydrochloride

Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂

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Light-driven breakdown of microcystin-LR in water: A critical review

Cited by 37 publications

References 224 publications

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies

In Situ Coupling Carbon Defective C3N5 Nanosheet with Ag2CO3 for Effective Degradation of Methylene Blue and Tetracycline Hydrochloride

Z-Scheme Heterojunction α-Fe2O3/Tubular g-C3N4 with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species 1O2

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Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂