Microplastics as an emerging anthropogenic vector of trace metals in freshwater: Significance of biofilms and comparison with natural substrates

Guan, Jiunian; Qi, Kun; Wang, Junyang; Wang, Weiwei; Wang, Zirui; Lü, Nan; Qu, Jiao

doi:10.1016/j.watres.2020.116205

Cited by 191 publications

(78 citation statements)

References 55 publications

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“…These in vitro studies suggest that a variety of chemical and physiological cues in different species and sections of the GIT may change the absorption profile of MPs to leach out chemicals internalized within the particle as well as those bound to the external surface of the particle. Chemicals within MPs often include additives such as flame retardants and bisphenols which are added to plastics to achieve certain properties (Chen, Allgeier, et al, 2019; Gunaalan et al, 2020; Sun, Nan, et al, 2019), while externally bound chemicals may include a variety of pharmaceuticals, fertilizers, pesticides and heavy metals encountered and bound in the freshwater environment (Atugoda et al, 2020; Bradney et al, 2019; Caruso, 2019; Guan et al, 2020). MPs may therefore vector or leach a range of different chemicals into fish and other biota that then produce effects according to factors such as the type of chemical, concentration, where the chemical is released within the GIT and whether the chemicals are taken up across the intestinal barrier (Bradney et al, 2019; Gunaalan et al, 2020).…”

Section: Occurrence Of Mps In Freshwater Fishes: From Sources To Egestionmentioning

confidence: 99%

Microplastics in freshwater fishes: Occurrence, impacts and future perspectives

et al. 2021

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Microplastics (MPs) are small, plastic particles of various shapes, sizes and polymers.Although well studied in marine systems, their roles and importance in freshwater environments remain uncertain. Nevertheless, the restricted ranges and variable traits of freshwater fishes result in their communities being important receptors and strong bioindicators of MP pollution. Here, the current knowledge on MPs in freshwater fishes is synthesized, along with the development of recommendations for future research and sample processing. MPs are commonly ingested and passively taken up by numerous freshwater fishes, with ingestion patterns often related to individual traits (e.g. body size, trophic level) and environmental factors (e.g. local urbanization, habitat features). Controlled MP exposure studies highlight various effects on fish physiology, biochemistry and behaviour that are often complex, unpredictable, species-specific and nonlinear in respect of dose-response relationships.Egestion is typically rapid and effective, although particles of a particular shape and/ or size may remain, or translocate across the intestinal wall to other organs via the blood. Regarding future studies, there is a need to understand the interactions of MP pollution with other anthropogenic stressors (e.g. warming, eutrophication), with a concomitant requirement to increase the complexity of studies to enable impact assessment at population, community and ecosystem levels, and to determine whether there are consequences for processes, such as parasite transmission, where MPs could vector parasites or increase infection susceptibility. This knowledge will determine the extent to which MP pollution can be considered a major anthropogenic stressor of freshwaters in this era of global environmental change.

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Section: Occurrence Of Mps In Freshwater Fishes: From Sources To Egestionmentioning

confidence: 99%

Microplastics in freshwater fishes: Occurrence, impacts and future perspectives

et al. 2021

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“…Therefore, TMs load on MPs should be looked at whilst considering the role of biofilm in this accumulation. So far, to the best of our knowledge, only few studies involving MPs, biofilm and metals were conducted, thus revealing a higher metal sorption when comparing MPs as pristine versus colonized by biofilm (Guan et al, 2020). Recently, metal accumulation has been shown to correlate with the amount of biofilm (Richard et al, 2019).…”

Section: Seawater Copper Content Controls Biofilm Bioaccumulation and Microbial Community On Microplasticsmentioning

confidence: 99%

“…Recently, reported studies have shown that biofilm developments on these synthetic particles eased metals accumulation, including Cu (Richard et al, 2019;Guan et al, 2020.…”

Section: Copper Bioaccumulation On Mps Is Due To Biofilmmentioning

confidence: 99%

Seawater copper content controls biofilm bioaccumulation and microbial community on microplastics

Djaoudi

Onrubia

Boukra

et al. 2022

Science of The Total Environment

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“…MPs can also play a role in the transport of trace metals. Guan et al (2020) reported that the development of biofilms enhanced the role of MPs in the transport and fate of trace metals [Ni(II), Cu(II), Zn(II), and Cd(II)] in the aqueous environment. They found that biofilms altered the kinetics of trace metal adsorption on MPs, mainly as a result of the complexation of functional groups on the surfaces of both MPs and biofilms.…”

Section: Role Of Microorganisms On the Toxic Effects Of Mps And Heavy Metalsmentioning

confidence: 99%

Interactions Between Microplastics and Heavy Metals in Aquatic Environments: A Review

et al. 2021

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Microplastics (MPs), tiny particles broken down from larger pieces of plastics, have accumulated everywhere on the earth. As an inert carbon stream in aquatic environment, they have been reported as carriers for heavy metals and exhibit diverse interactive effects. However, these interactions are still poorly understood, especially mechanisms driving these interactions and how they pose risks on living organisms. In this mini review, a bibliometric analysis in this field was conducted and then the mechanisms driving these interactions were examined, especially emphasizing the important roles of microorganisms on the interactions. Their combined toxic effects and the potential hazards to human health were also discussed. Finally, the future research directions in this field were suggested. This review summarized the recent research progress in this field and highlighted the essential roles of the microbes on the interactions between MPs and heavy metals with the hope to promote more studies to unveil action mechanisms and reduce/eliminate the risks associated with MP presence.

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Microplastics as an emerging anthropogenic vector of trace metals in freshwater: Significance of biofilms and comparison with natural substrates

Cited by 191 publications

References 55 publications

Microplastics in freshwater fishes: Occurrence, impacts and future perspectives

Microplastics in freshwater fishes: Occurrence, impacts and future perspectives

Seawater copper content controls biofilm bioaccumulation and microbial community on microplastics

Interactions Between Microplastics and Heavy Metals in Aquatic Environments: A Review

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