Investigation of microplastic pollution in Torghabeh River sediments, northeast of Iran

Bonyadi, Ziaeddin; Maghsodian, Zeinab; Zahmatkesh, Mohammad Hasan; Nasiriara, Javad; Ramavandi, Bahman

doi:10.1016/j.jconhyd.2022.104064

Cited by 29 publications

(5 citation statements)

References 50 publications

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“…Our data hereby supports the observation of PS in the sediment (e.g. Bonyadi et al, 2022;Everaert et al, 2022), which could not directly be explained merely by the density of PS. The third group consists of the larger PET, of which the sinking velocity is merely influenced by density of the polymer.…”

Section: Environmental Implications and Future Research Needssupporting

confidence: 88%

Microplastic-specific biofilm growth determines the vertical transport of plastics in freshwater

Vercauteren,

Lambert,

Hoogerwerf

et al. 2024

Science of The Total Environment

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Section: Environmental Implications and Future Research Needssupporting

confidence: 88%

Microplastic-specific biofilm growth determines the vertical transport of plastics in freshwater

Vercauteren,

Lambert,

Hoogerwerf

et al. 2024

Science of The Total Environment

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“…Polystyrene (PS) was chosen because it is one of the most common plastic type in freshwater sediments, − which can carry different functional groups − (e.g., carboxyl, amine, hydroxyl) in the environment. The average size of the PS-NPs found in marine organisms is close to 50 nm, , which may be easily absorbed by aquatic organisms, such as C. kiinensis .…”

Section: Methodsmentioning

confidence: 99%

Nanoplastics Affect the Bioaccumulation and Gut Toxicity of Emerging Perfluoroalkyl Acid Alternatives to Aquatic Insects (Chironomus kiinensis): Importance of Plastic Surface Charge

Zhang,

Xia,

et al. 2024

ACS Nano

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Persistent organic pollutants (POPs) have been widely suggested as contributors to the aquatic insect biomass decline, and their bioavailability is affected by engineered particles. However, the toxicity effects of emerging ionizable POPs mediated by differentially charged engineered nanoparticles on aquatic insects are unknown. In this study, 6:2 chlorinated polyfluoroalkyl ether sulfonate (F-53B, an emerging perfluoroalkyl acid alternative) was selected as a model emerging ionizable POP; the effect of differentially charged nanoplastics (NPs, 50 nm, 0.5 g/kg) on F-53B bioaccumulation and gut toxicity to Chironomus kiinensis were investigated through histopathology, biochemical index, and gut microbiota analysis. The results showed that when the dissolved concentration of F-53B remained constant, the presence of NPs enhanced the adverse effects on larval growth, emergence, gut oxidative stress and inflammation induced by F-53B, and the enhancement caused by positively charged NP-associated F-53B was stronger than that caused by the negatively charged one. This was mainly because positively charged NPs, due to their greater adsorption capacity and higher bioavailable fraction of associated F-53B, increased the bioaccumulation of F-53B in larvae more significantly than negatively charged NPs. In addition, positively charged NPs interact more easily with gut biomembranes and microbes with a negative charge, further increasing the probability of F-53B interacting with gut biomembranes and microbiota and thereby aggravating gut damage and key microbial dysbacteriosis related to gut health. These findings demonstrate that the surface charge of NPs can regulate the bioaccumulation and toxicity of ionizable POPs to aquatic insects.

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“…Primary MPs are intentionally manufactured in small sizes for specific applications such as cosmetics 6 , drug delivery in medicine, and cleaning agents 7 . Secondary MPs are formed as larger plastics break down into smaller particles through physical, chemical, and biological processes 8 , 9 . Due to their small size, large surface-to-volume ratio, and hydrophobic surface properties, microplastics have a greater tendency to absorb pollutants 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

Using Spirulina platensis as a natural biocoagulant for polystyrene removal from aqueous medium: performance, optimization, and modeling

Eydi Gabrabad,

Yari,

Bonyadi

2024

Sci Rep

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Microplastics (MPs) are newly recognized contaminants that result from the breakdown of plastics released into aquatic environments. This study focuses on the elimination of polystyrene (PS) using S. platensis, a natural biocoagulant, from aqueous solutions. The research investigated several crucial variables, including the initial level of PS ranging from 100 to 900 mg L−1, pH levels from 4 to 10, the contact time of 20–40 min, and doses of S. platensis ranging from 50 to 250 mg L−1. The analysis of the data revealed that the quadratic model offered the best fit for the experimental results. In the present study, we utilized S. platensis as a novel natural biocoagulant to effectively eliminate PS from aqueous solutions. Process optimization was performed using a Box–Behnken design (BBD). The best-fitting model for the data was the quadratic model. The results displayed that the highest elimination of PS (81%) was occurred at a pH of 4, with a contact time of 30 min, a dose of S. platensis at 250 mg L−1, and a PS concentration of 500 mg L−1. These findings show that S. platensis has a significant effect on removing PS from the aquatic environment. Algae can serve as a convenient and eco-friendly method, replacing chemical coagulants, to effectively remove MPs from the aquatic environment.

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Investigation of microplastic pollution in Torghabeh River sediments, northeast of Iran

Cited by 29 publications

References 50 publications

Microplastic-specific biofilm growth determines the vertical transport of plastics in freshwater

Microplastic-specific biofilm growth determines the vertical transport of plastics in freshwater

Nanoplastics Affect the Bioaccumulation and Gut Toxicity of Emerging Perfluoroalkyl Acid Alternatives to Aquatic Insects (Chironomus kiinensis): Importance of Plastic Surface Charge

Using Spirulina platensis as a natural biocoagulant for polystyrene removal from aqueous medium: performance, optimization, and modeling

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