Toxic effects of pesticides on the marine microalga Skeletonema costatum and their biological degradation

Zhang, Zilian; Chen, Bin; Dong, Taojie; Chen, Meng

doi:10.1007/s11430-022-1064-7

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Many studies focused on green microalgae, and seldomly use cyanobacteria or diatoms, which are also efficient in removing OMPs (Ding et al, 2019;Fang et al, 2023;Wang et al, 2020;Zhang et al, 2023). For example, Fang et al (2023) reported that 33 to 66% of sulfamethoxazole and ofloxacin (both antibiotics) were removed by the cyanobacteria Synechococcus sp.…”

Section: Introductionmentioning

confidence: 99%

“…after 4 days of batch incubation. The diatom Skeletonema costatum removed 67% of dicofol, 76% of acetochlor and 77% of chlorpyrifos after 14 days of batch incubation (Zhang et al, 2023). Thus, studies on microalgal species richness, including taxonomic diversity, are needed for elucidating how biodiversity affected microalgae-based OMPs removal.…”

Section: Introductionmentioning

confidence: 99%

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Microalgae-based technology for wastewater treatment: exploring organic micropollutants removal

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Organic micropollutants (OMPs) need to be removed from wastewater as they can negatively affect aquatic organisms. It has been demonstrated that microalgae-based technologies are efficient in removing OMPs from wastewater. In this study, the removal processes and kinetics of six persistent OMPs (diclofenac, clarithromycin, benzotriazole, metoprolol, carbamazepine and mecoprop) were studied during cultivation of Scenedesmus obliquus in batch mode. These OMPs were added as individual compounds and in a mixture. The short experiments (8 days) were designed to avoid masking of OMPs removal processes by light and nutrient limitation. The results show that diclofenac, clarithromycin, and benzotriazole were mainly removed by photodegradation (diclofenac), biodegradation (benzotriazole), or a combination of the two processes (clarithromycin). Peroxidase was involved in intracellular and extracellular biodegradation when benzotriazole was present as individual compound. Carbamazepine, metoprolol and mecoprop showed no significant biodegradation or photodegradation, and neglectable removal (<5%) by bioadsorption and bioaccumulation. The mixture of OMPs had an adverse effect on the photodegradation of clarithromycin and diclofenac, with reduced first-order kinetic constants compared to the individual compounds. Benzotriazole biodegradation was inhibited by the presence of the mixture of OMPs. This indicates that the presence of the OMPs inhibits the photodegradation and biodegradation of some individual OMPs. These results will improve our understanding on the removal processes of individual and mixtures of OMPs by microalgae-based technologies for wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microalgae-based technology for wastewater treatment: exploring organic micropollutants removal

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Harnessing the potential of microalgae-based systems for mitigating pesticide pollution and its impact on their metabolism

Fayaz,

Rana,

Goyal

et al. 2024

Journal of Environmental Management

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Glyphosate lessons: is biodegradation of pesticides a harmless process for biodiversity?

Lozano,

Pizarro

2024

Environ Sci Eur

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The historical perspective on the rapid biodegradation of pesticides as a mitigating factor in environmental risk assessment is reexamined through the example of glyphosate and its implications for freshwater biodiversity. Commonly employed standardized methods by national agencies for assessing the environmental risk of pesticides predominantly rely on single-species tests, overlooking the intricate nature of ecosystems. Glyphosate, one of the most widely used pesticides marketed for its purported rapid biodegradability, is often perceived as relatively innocuous. However, its degradation releases phosphorus into the environment, inducing a trophic state shift in water systems towards more eutrophic conditions, consequently affecting water quality. These findings highlight the cascading ecological repercussions of glyphosate biodegradation, driving the proliferation of specific aquatic organisms, such as picocyanobacteria and metaphyton, resulting in the alteration of ecosystem structure and dynamics. The study explores challenges posed by commercial pesticide formulations and investigates the consequences of pesticide interactions with specific anthropogenic factors. A case in point is the interaction of glyphosate with the invasive mussel Limnoperna fortunei, exacerbating the overall scenario. The ecological framework analyzed challenges the conventional notion that pesticide biodegradation is inherently a neutral or positive event. The results underscore the necessity of reassessing the role of biodegradation itself in environmental impact assessments for pesticides.

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Toxic effects of pesticides on the marine microalga Skeletonema costatum and their biological degradation

Cited by 3 publications

References 46 publications

Microalgae-based technology for wastewater treatment: exploring organic micropollutants removal

Microalgae-based technology for wastewater treatment: exploring organic micropollutants removal

Harnessing the potential of microalgae-based systems for mitigating pesticide pollution and its impact on their metabolism

Glyphosate lessons: is biodegradation of pesticides a harmless process for biodiversity?

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