Effects of molecular-level component variation of fulvic acid on photodegradation of Microcystin-LR under solar irradiation

Sun, Qiyuan; Wang, Gang; Yin, Ran; Zhang, Tianfang; Zheng, Yanmei; Wu, Chunshan; Liu, Changqing; Huang, Kun; Wang, Feifeng

doi:10.1016/j.cej.2022.137553

Cited by 10 publications

(3 citation statements)

References 58 publications

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“…This result is consistent with previous research results. The elution effect of FA on As, Ca, and Fe is significantly better than that of HA ( Sun et al, 2022 ), indicating that the adsorption of metals is stronger in the solid phase by FA than by HA. Apart from that, in a microplastic environment, the adsorption capacities of microplastics with different aging degrees to Pb 2+ increase with FA content ( Guan et al, 2022 ).…”

Section: Mechanism Of Fa Controlling Metal Environmental Behaviormentioning

confidence: 94%

“…A large number of radical components (e.g., quinone or semi-quinone) in natural DOM act as electron transfer mediators that accelerate the photoreduction of metals in the oxidized state ( Berkovic et al, 2012 ). Under light (especially under UV radiation in the range of 290–400 nm), the type and abundance of an FA functional group, molecular structure, chemical composition, configuration, and conformation undergo significant changes ( Cho and Choi, 2002 ; Filipe et al, 2020 ; Sun et al, 2022 ), and thus FA can mediate the migration, transformation, and other environmental behavior of metals in sediments. For example, FA–Hg (II) complexes are decomposed into many small molecular substances after UV light treatment, and a large number of highly reducing substances (e.g., COO and –COOH), which can mediate the reduction of Hg (II), are produced in this process.…”

Section: Mechanism Of Fa Controlling Metal Environmental Behaviormentioning

confidence: 99%

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Applying fulvic acid for sediment metals remediation: Mechanism, factors, and prospect

Song

Sun²,

Wang³

et al. 2023

Front. Microbiol.

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Fulvic acid (FA) has been shown to play a decisive role in controlling the environmental geochemical behavior of metals. As a green and natural microbial metabolite, FA is widely used in environmental remediation because of its good adsorption complexation and redox ability. This paper introduces the reaction mechanism and properties of FA with metals, and reviews the progress of research on the remediation of metal pollutant by FA through physicochemical remediation and bioremediation. FA can control the biotoxicity and migration ability of some metals, such as Pb, Cr, Hg, Cd, and As, through adsorption complexation and redox reactions. The concentration, molecular weight, and source are the main factors that determine the remediation ability of FA. In addition, the ambient pH, temperature, metal ion concentrations, and competing components in sediment environments have significant effects on the extent and rate of a reaction between metals and FA during the remediation process. Finally, we summarize the challenges that this promising environmental remediation tool may face. The research directions of FA in the field of metals ecological remediation are also prospected. This review can provide new ideas and directions for the research of remediation of metals contaminants in sediments.

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Section: Mechanism Of Fa Controlling Metal Environmental Behaviormentioning

confidence: 94%

Section: Mechanism Of Fa Controlling Metal Environmental Behaviormentioning

confidence: 99%

Applying fulvic acid for sediment metals remediation: Mechanism, factors, and prospect

Song

Sun²,

Wang³

et al. 2023

Front. Microbiol.

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“…Both species produce neurotoxins (e.g., anatoxins), while Anabaena also produces dissolved microcystins, cyanobacterial secondary metabolites [58][59][60]. While both microcystin and anatoxin-a can be degraded to nontoxic degradation products [61][62][63], microcystins can persist for weeks [64,65]. Even if a bloom has collapsed, microcystins can still exist for several months [66] and be transported over long distances [67].…”

Section: Hab and Genotoxic Responses Of Tradescantiamentioning

confidence: 99%

Tradescantia-Based Test Systems Can Be Used for the Evaluation of the Toxic Potential of Harmful Algal Blooms

Khosrovyan

Avalyan

Atoyants

et al. 2023

Water

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Harmful algal blooms (HABs) are overgrowths of toxic strains of algae (diatoms, green) and cyanobacteria (blue-green algae). While occurring naturally, human-induced environmental changes have resulted in more frequent occurrences of such blooms worldwide. Meantime, the ecotoxicological risk of HABs is rarely evaluated by means of standard test methods. For the first time, the genotoxic potential of the HAB event 2020 was assessed using two different Tradescantia-based test systems (Trad-SHM and Trad-MN, 24-h exposure). An integrated analysis of biological (algal abundance) and ecotoxicological (testing) data revealed linkages among algal proliferation, changes in Tradescantia stamen hairs (mutations and suppressed growth) and chromosomal aberrations during microsporogenesis (appearance of micronuclei) that were likely to be caused by toxic algal groups. Green alga Botryococcus braunii and the cyanobacterial species Anabaena and Oscillatoria could suppress stamen hair growth; Cyanobacteria Phormidium and Aphanothece sp. could trigger mutations in stamen hairs (appearance of pink and colorless cells); and Oscillatoria sp. could be responsible for the occurrence of chromosomal damage. Diatom proliferation in the spring was not related to the genotoxic response in Tradescantia. Both tests, the Trad-SHM and Trad-MN, are suitable for the evaluation of the toxic potential of HABs.

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Hazardous or Advantageous: Uncovering the Roles of Heavy Metals and Humic Substances in Shilajit (Phyto-mineral) with Emphasis on Heavy Metals Toxicity and Their Detoxification Mechanisms

Hussain,

Saeed

2024

Biol Trace Elem Res

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Effects of molecular-level component variation of fulvic acid on photodegradation of Microcystin-LR under solar irradiation

Cited by 10 publications

References 58 publications

Applying fulvic acid for sediment metals remediation: Mechanism, factors, and prospect

Applying fulvic acid for sediment metals remediation: Mechanism, factors, and prospect

Tradescantia-Based Test Systems Can Be Used for the Evaluation of the Toxic Potential of Harmful Algal Blooms

Hazardous or Advantageous: Uncovering the Roles of Heavy Metals and Humic Substances in Shilajit (Phyto-mineral) with Emphasis on Heavy Metals Toxicity and Their Detoxification Mechanisms

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