Toxic effects of polystyrene nanoplastics on microalgae Chlorella vulgaris: Changes in biomass, photosynthetic pigments and morphology

Khoshnamvand, Mehdi; Hanachi, Parichehr; Ashtiani, Saeed; Walker, Tony R.

doi:10.1016/j.chemosphere.2021.130725

Cited by 77 publications

(18 citation statements)

References 63 publications

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“…Previous studies found a direct relationship between algal growth and Chla content [19][20][21]. Here, results of Chla indicate that microalgae growth was generally affected with a CB concentration of more than 2%.…”

Section: Discussionsupporting

confidence: 55%

Remediation Capacity of Different Microalgae in Effluents Derived from the Cigarette Butt Cleaning Process

Chiellini

Mariotti

Reyes

et al. 2022

Plants

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Microalgal-based remediation is an ecofriendly and cost-effective system for wastewater treatment. This study evaluated the capacity of microalgae in the remediation of wastewater from cleaning process of smoked cigarette butts (CB). At laboratory scale, six strains (one from the family Scenedesmaceae, two Chlamydomonas debaryana and three Chlorella sorokiniana) were exposed to different CB wastewater dilutions to identify toxicity levels reflected in the alteration of microalgal physiological status and to determine the optimal conditions for an effective removal of contaminants. CB wastewater could impact on microalgal chlorophyll and carotenoid production in a concentration-dependent manner. Moreover, the resistance and remediation capacity did not only depend on the microalgal strain, but also on the chemical characteristics of the organic pollutants. In detail, nicotine was the most resistant pollutant to removal by the microalgae tested and its low removal correlated with the inhibition of photosynthetic pigments affecting microalgal growth. Concerning the optimal conditions for an effective bioremediation, this study demonstrated that the Chlamydomonas strain named F2 showed the best removal capacity to organic pollutants at 5% CB wastewater (corresponding to 25 butts L−1 or 5 g CB L−1) maintaining its growth and photosynthetic pigments at control levels.

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Section: Discussionsupporting

confidence: 55%

Remediation Capacity of Different Microalgae in Effluents Derived from the Cigarette Butt Cleaning Process

Chiellini

Mariotti

Reyes

et al. 2022

Plants

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“…Exposure to carboxyl-modified NPs inhibited the growth of Raphidocelis subcapitata, diatom, Chlorella Vulgaris, Phaeodactylum tricornutum, and Rhodomonas baltica, which was manifested in morphological changes, interference with mitotic cycle, reduction in chlorophyll content, and photosynthetic efficiency (Bellingeri et al, 2019). PS-NH 2 NPs with diameters of 90 and 200 nm decreased the biomass and the content of chlorophyll a in Chlorella Vulgaris, and mallsized PS-NH 2 NPs were more toxic than large-sized ones (Khoshnamvand et al, 2021).…”

Section: Algae and Plantsmentioning

confidence: 98%

Influence of Functional Group Modification on the Toxicity of Nanoplastics

et al. 2022

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Nanoplastics (NPs) are ubiquitous in harvested organisms at various trophic levels, and more concerns on their diverse responses and wide species-dependent sensitivity are continuously increasing. However, systematic study on the toxic effects of NPs with different functional group modifications is still limited. In this review, we gathered and analyzed the toxic effects of NPs with different functional groups on microorganisms, plants, animals, and mammalian/human cells in vitro. The corresponding toxic mechanisms were also described. In general, most up-to-date relevant studies focus on amino (−NH2) or carboxyl (−COOH)-modified polystyrene (PS) NPs, while research on other materials and functional groups is lacking. Positively charged PS-NH2 NPs induced stronger toxicity than negatively charged PS-COOH. Plausible toxicity mechanisms mainly include membrane interaction and disruption, reactive oxygen species generation, and protein corona and eco-corona formations, and they were influenced by surface charges of NPs. The effects of NPs in the long-term exposure and in the real environment world also warrant further study.

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“…The effects of fluorescent PS NPs (100 nm) on trophic transfer, individual impact and embryonic uptake in a freshwater environment were studied in this research via direct contact to the particles with four species, namely the alga (Chlamydomonas reinhardtii), water fea (Daphnia magna), secondary-consumer fish (Oryzias sinensis) and end-consumer fish (Zacco temminckii). Another study by [57] utilized optical microscope to study PS NPs toxicity on green microalgae Chlorella vulgaris. The findings of the research demonstrated that optical microscopy may be used to track the transit of NPs ingested by organisms.…”

Section: Optical Microscopymentioning

confidence: 99%

“…[78] used the FE-SEM to study small MPs (100 nm) in sediment samples collected in the Northern coast of the Persian Gulf, while ref. [57] utilized it to study PS NPs toxicity on green microalgae Chlorella vulgaris. These studies showed that the method enables the acquisition of high-quality and high-magnification pictures without the need for additional sample preparation prior to observation.…”

Section: Field Emission Scanning Electron Microscopy (Fe-sem)mentioning

confidence: 99%

New Analytical Approaches for Effective Quantification and Identification of Nanoplastics in Environmental Samples

et al. 2021

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Nanoplastics (NPs) are a rapidly developing subject that is relevant in environmental and food research, as well as in human toxicity, among other fields. NPs have recently been recognized as one of the least studied types of marine litter, but potentially one of the most hazardous. Several studies are now being reported on NPs in the environment including surface water and coast, snow, soil and in personal care products. However, the extent of contamination remains largely unknown due to fundamental challenges associated with isolation and analysis, and therefore, a methodological gap exists. This article summarizes the progress in environmental NPs analysis and makes a critical assessment of whether methods from nanoparticles analysis could be adopted to bridge the methodological gap. This review discussed the sample preparation and preconcentration protocol for NPs analysis and also examines the most appropriate approaches available at the moment, ranging from physical to chemical. This study also discusses the difficulties associated with improving existing methods and developing new ones. Although microscopical techniques are one of the most often used ways for imaging and thus quantification, they have the drawback of producing partial findings as they can be easily mixed up as biomolecules. At the moment, the combination of chemical analysis (i.e., spectroscopy) and newly developed alternative methods overcomes this limitation. In general, multiple analytical methods used in combination are likely to be needed to correctly detect and fully quantify NPs in environmental samples.

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Toxic effects of polystyrene nanoplastics on microalgae Chlorella vulgaris: Changes in biomass, photosynthetic pigments and morphology

Cited by 77 publications

References 63 publications

Remediation Capacity of Different Microalgae in Effluents Derived from the Cigarette Butt Cleaning Process

Remediation Capacity of Different Microalgae in Effluents Derived from the Cigarette Butt Cleaning Process

Influence of Functional Group Modification on the Toxicity of Nanoplastics

New Analytical Approaches for Effective Quantification and Identification of Nanoplastics in Environmental Samples

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