Research Progress of Microplastics in Freshwater Sediments in China

Abstract

Microplastic pollution has attracted more and more people's attention, and it exists widely in our living environment. Microplastics are difficult to be degraded, most of them migrate from the land to the water, and finally deposit in the sediment. They are easy to have a great impact on water bodies and aquatic organisms, and even affect the daily life of human beings. Based on the research literature on microplastics in recent years, this paper reviews the research progress of microplastics in freshwater sediments in China, discusses several commonly used methods of sampling, separation, and detection of microplastics in freshwater sediments, summarizes the distribution characteristics of microplastics in freshwater sediments in China, analyzes the toxicological effects of microplastics, and introduces the degradation methods of microplastics. This study will provide valuable reference for further study of microplastics in freshwater environment in the future.

Toxicological Response of Zebrafish Exposed to Cocktails of Polymeric Materials and Valproic Acid

“…Both terrestrial and aquatic environments are affected by the increase in polymer pollution. Larger plastics gradually degrade into mesoplastics (5-20 mm diameter) and microplastics (<5 mm), which are difficult to degrade naturally [2]. This is an alarming problem for fresh water and sea water as well.…”

Microplastic occurrence in fish species from the Iquitos region in Peru, western Amazonia

“…The contamination of aquatic environments by plastics has been intensified in the last years (Peters and Bratton 2016;Lebreton and Andrady 2019;Amobonye et al 2021). The lack of proper waste management leads to the high levels of plastic particles in freshwater sediments (Zhang et al 2020;Yang et al 2021). Primary plastic items such as bottles and bags are a lesser problem than the microplastic particles resulting from plastic degradation in the environment (Eriksen et al 2013, Waldman andRillig 2020).…”

“…Microplastic occurrence in the aquatic fauna has been studied in water systems of North America (Hurt et al 2020;Peters and Bratton 2016), Europe (Bellas et al 2016;McGoran et al 2017), Asia (Zhang et al 2020;Phuong et al 2022;Piyawardhana et al 2022), Australia (Cannon et al 2016;Su et al 2019), Africa (Biginagwa et al 2016;Naidoo et al 2016) and South America (Silva-Cavalcanti et al 2017;Ribeiro-Brasil et al 2020). In the Brazilian Amazon region, microplastics were reported from the stomach of fishes in Amapá state (Pegado Souza et al 2018), the stomachs of piranha and pacu fishes from the Xingu River, and the gills and stomsch of stream fish in Pará state (Andrade et al 2019;Ribeiro-Brasil et al 2020).…”

Microplastics in sediments of the river Rhine—A workflow for preparation and analysis of sediment samples from aquatic river systems for monitoring purposes

“…Sediments contains plenty of inorganic compounds. Hence, routinely used density separation [12][13][14] seems to be a suitable method for MP investigations to increase the concentration of MP particles with simultaneous removal of natural inorganic particles.…”

“…Sediments contains plenty of inorganic compounds. Hence, routinely used density separation [12–14] seems to be a suitable method for MP investigations to increase the concentration of MP particles with simultaneous removal of natural inorganic particles. Typically, this is accomplished through the use of high‐density aqueous salt solutions, utilizing sodium iodide (NaI), zinc chloride (ZnCl 2 ) or sodium polytungstate solutions [15].…”