Microplastics in sediments of the Changjiang Estuary, China

Peng, Guyu; Zhu, Bangshang; Yang, Dongqi; Su, Lei; Shi, Huahong; Li, Daoji

doi:10.1016/j.envpol.2016.12.064

Cited by 642 publications

(216 citation statements)

References 31 publications

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“…In the laboratory, samples were processed based on previous criteria, with little modifications [21]. Metal filters were oven-dried at 60 °C for 24 h and sediment samples were dried at 75 °C for 72 h to constant weight.…”

Section: Sample Collection and Processingmentioning

confidence: 99%

“…9.8% in water). A large number of transparent plastics are commonly used in fishing nets and lines for the frequent fishery activities in Shanghai [21], and transparent microplastics in sediment samples may be attributed to the bleaching caused by digests. The lower limit of microplastics size was 300 μm in surface water and 75 μm in sediments, as dictated by different filters.…”

Section: Shape Color and Size Of Microplasticsmentioning

confidence: 99%

“…Zhao collected 100 L water samples during the ebb phase and reported the overall mean microplastic abundance was 157.2 ± 75.8 items m − 3 [20]. After analyzing 100 g sediment, Peng reported that the mean concentration of microplastics in surface sediments of the Yangtze Estuary was 121 ± 9 items kg − 1 dry weight [21]. Additionally, previous studies have assessed the environmental risk of microplastics and re-estimated the riverine plastic load of the Yangtze River [20,22].…”

Section: Introductionmentioning

confidence: 99%

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Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

Zheng

et al. 2020

Environ Sci Eur

153

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Background: The Yangtze Estuary acts as gateways where microplastics transport from freshwater into marine environments, with one of the largest discharge volumes in the world. The occurrence of microplastics in surface water and sediments of the Yangtze Estuary has been reported. However, little is known about microplastics in and around Chongming Island in the estuary. In this study, the distribution of microplastics in surface water and sediments of Chongming Island was investigated and compared in different environmental medium.Results: Abundances of microplastics in surface water and sediments were in the ranges of 0-259 items m − 3 and 10-60 items kg − 1 dry weight, respectively. Microplastics were more abundant in the surface water of the Yangtze River shores than in the inland rivers (p < 0.01). Proportions in fiber form in surface water and sediment were 33% and 67%; and those in fragment form were 39% and 24%. Most particles (> 72%) were < 1 mm in the longest dimension; 65% were white and 30% were transparent. Of the 11 compositions identified, polyethylene, polypropylene, and α-cellulose predominated in both phases.Conclusion: This is the first study to focus on microplastics in inland watercourses on Chongming Island and along the Yangtze River's shores in both phases. There were differences between the island and estuary in composition and density due to the distinct vertical mixing processes. The in situ filtration of surface water (100 L) sampling method was well employed in various freshwater environments and free of plastic materials in front of the filter, analysis results of which provided an important baseline reference for evaluating microplastic pollution in the Yangtze Estuary. Publisher's NoteSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Sample Collection and Processingmentioning

confidence: 99%

Section: Shape Color and Size Of Microplasticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

Zheng

et al. 2020

Environ Sci Eur

153

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“…Current limited information shows that the abundance of microplastics in freshwater environments is comparable to the level of the marine environment [20], and exist extensively in rivers and lakes. Microplastics in the great lakes of North America have an average abundance of 43,000 ind/km 2 , mainly in the form of fragments floating on the water [21].…”

Section: Distribution and Sources Of Microplasticmentioning

confidence: 99%

Research on ecotoxicology of microplastics on freshwater aquatic organisms

Wang

Liu

et al. 2019

Environmental Pollutants and Bioavailability

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As a new type of pollutant, microplastics are an emerging scientific and social concern in the environment and are widely distributed in the aquatic environment and organism. Nowadays, researches on microplastic pollution mainly focus on the marine environment. As a bridge for the migration of microplastics from the terrestrial environment to the marine environment, the freshwater environment has been deserved more attention. Published articles on microplastics in freshwater environments were reviewed in this paper, and four typical behaviors of microplastics were summarized: biological ingestion, biological attachment, adsorption of pollutants and release of plasticizers. In addition, the progress in research and results on the ecological toxicity of microplastics to freshwater organisms was also analyzed. Finally, emphasis on future research on the toxicity of microplastics to freshwater aquatics organisms was made throughout this review as a tool in microplastic risk assessment research. ARTICLE HISTORY

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“…China is the largest producer of plastic waste, and its output of plastic to the ocean is assumed to exceed 25% of the total global loading (Jambeck et al, 2015). Investigations show that microplastic pollution is especially serious in coastal and estuarine regions of China from north to south (Zhao et al, 2014;Qiu et al, 2015;Peng et al, 2017;Zhu et al, 2018), including the Ou River estuary at Southeast China where this study is located (Zhao et al, 2015). Similar to most coastal zones in China, the sediment settling rate and hence expansion of tidal mudflats surrounding the Ou River estuary are greatly accelerated by invasion of the saltmarsh cordgrass Spartina alterniflora .…”

Section: Introductionmentioning

confidence: 99%