risk assessment Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/tag/risk-assessment-en/ Eine weitere WordPress-Website Wed, 05 Jul 2023 05:50:27 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.5 https://oneearth-oneocean.com/wp-content/uploads/2022/08/cropped-oeoo-logo-unterzeile-blau-1-32x32.jpg risk assessment Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/tag/risk-assessment-en/ 32 32 Microplastics in freshwater river sediments in Shanghai, China: A case study of risk assessment in mega-cities https://oneearth-oneocean.com/en/international-marine-litter-database-en-en/2021/microplastics-in-freshwater-river-sediments-in-shanghai-china-a-case-study-of-risk-assessment-in-mega-cities/ Thu, 18 Mar 2021 17:09:17 +0000 https://oneearth-oneocean.com/2021/03/18/microplastics-in-freshwater-river-sediments-in-shanghai-china-a-case-study-of-risk-assessment-in-mega-cities/ Guyu Peng, Pei Xu, Bangshang Zhu, Mengyu Bai, Daoji Li, Microplastics in freshwater river sediments in Shanghai, China: A case study of risk assessment in mega-cities, Environmental Pollution, Volume 234, 2018, Pages 448-456, ISSN 0269-7491, Abstract: Microplastics, which are plastic debris with a particle diameter of less than 5 mm, have attracted growing attention in recent years. Its widespread distributions in a variety of habitats have urged scientists to understand deeper regarding their potential impact on the marine living resources. Most studies on microplastics hitherto are focused on the marine environment, and research on risk assessment methodology is still limited. To understand the distribution of microplastics in urban rivers, this study investigated river sediments in Shanghai, the largest urban area in China. Seven sites were sampled to ensure maximum coverage of the city’s central districts, and a tidal flat was also included to compare with river samples. Density separation, microscopic inspection and μ-FT-IR analysis were conducted to analyze the characteristics of microplastics and the type of polymers. The average abundance of microplastics in six river sediment samples was 802 items per kilogram of dry weight. The abundance in rivers was one to two orders of magnitude higher than in the tidal flat. White microplastic spheres were most commonly distributed in river sediments. Seven types of microplastics were identified, of which polypropylene was the most prevailing polymers presented. The study then conducted risk assessment of microplastics in sediments based on the observed results, and proposed a framework of environmental risk assessment. After reviewing waste disposal related legislation and regulations in China, this study conclude that in situ data and legitimate estimations should be incorporated as part of the practice when developing environmental policies aiming to tackle microplastic pollution. https://drive.google.com/open?id=1KQy0_3mV4Bi0ymswMoWZlEvJXpycyjAy https://doi.org/10.1016/j.envpol.2017.11.034. (http://www.sciencedirect.com/science/article/pii/S0269749117332797)

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]]> Guyu Peng, Pei Xu, Bangshang Zhu, Mengyu Bai, Daoji Li,

Microplastics in freshwater river sediments in Shanghai, China: A case study of risk assessment in mega-cities,

Environmental Pollution, Volume 234, 2018, Pages 448-456, ISSN 0269-7491,

Abstract:

Microplastics, which are plastic debris with a particle diameter of less than 5 mm, have attracted growing attention in recent years. Its widespread distributions in a variety of habitats have urged scientists to understand deeper regarding their potential impact on the marine living resources.
Most studies on microplastics hitherto are focused on the marine environment, and research on risk assessment
methodology is still limited. To understand the distribution of microplastics in urban rivers, this study investigated river sediments in Shanghai, the largest urban area in China.
Seven sites were sampled to ensure maximum coverage of the city’s central districts, and a tidal flat was also included to compare with river samples. Density separation, microscopic inspection and μ-FT-IR analysis were conducted to analyze the characteristics of microplastics and the type of polymers.
The average abundance of microplastics in six river sediment samples was 802 items per kilogram of dry weight. The abundance in rivers was one to two orders of magnitude higher than in the tidal flat. White microplastic spheres were most commonly distributed in river sediments. Seven types of microplastics were identified, of which
polypropylene was the most prevailing polymers presented.
The study then conducted risk assessment of microplastics in sediments based on the observed results, and proposed a framework of environmental risk assessment. After reviewing waste disposal related legislation and
regulations in China, this study conclude that in situ data and legitimate estimations should be incorporated as part of the practice when developing environmental policies aiming to tackle microplastic pollution.

https://drive.google.com/open?id=1KQy0_3mV4Bi0ymswMoWZlEvJXpycyjAy
https://doi.org/10.1016/j.envpol.2017.11.034.

(http://www.sciencedirect.com/science/article/pii/S0269749117332797)

The post Microplastics in freshwater river sediments in Shanghai, China: A case study of risk assessment in mega-cities appeared first on One Earth - One Ocean e. V..

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