Distribution and characteristics of microplastics in the Yulin River, China: Role of environmental and spatial factors

Mao, Yufeng; Hong, Li; Gu, Weikang; Yang, Guofeng; Liu, Yao; He, Qiang

doi:10.1016/j.envpol.2020.115033

Cited by 81 publications

(23 citation statements)

References 46 publications

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“…(MP/m 3 ) This study (corrected)*** Sampling method Sample volume (l) Cut-off (μm) Digestion/temp. Identification Mean/median min–max 63 μm-system (min–max) 20 μm-system (min–max) Mao et al 2020 CHN River Pump, filtration 50 64 H 2 O 2 (30%)/100 °C Nile red, Raman n.r. 7–700** 121–347 272–430 Pan et al 2020 CHN River Metal bucket, filtration 20 330 H 2 O 2 (30%) with 0.05 M FeSO 4 Visual, Raman 246/n.r.…”

Section: Discussionmentioning

confidence: 99%

Microplastic concentrations, characteristics, and fluxes in water bodies of the Tollense catchment, Germany, with regard to different sampling systems

Tamminga

Hengstmann

Deuke

et al. 2021

Environ Sci Pollut Res

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The widespread presence of microplastics in multiple environmental compartments has largely been demonstrated. Assessing the ecological risk that microplastics pose is, at the present stage, hindered due to methodical differences. Moreover, different methods hamper meaningful comparisons between studies and data on microplastics <300 μm is scarce. Therefore, we focused on microplastics >20 μm in freshwater and sampling-related aspects in this concern. Sampling was conducted between 2018 and 2020 in the Tollense catchment in northeastern Germany and was carried out by in situ pump filtration. Two different sampling systems (cutoff sizes 20 μm and 63 μm) were applied to filter water volumes of 0.075–1.836 m3. Retained particles were analyzed by a combination of Nile red staining and micro-Raman spectroscopy. Thereby, we found microplastic concentrations between 123 and 1728 particles m−3 using the 63-μm cut-off size and between 1357 and 2146 particles m−3 using the 20-μm cut-off size. Local hydrodynamics (discharge and flow velocity) and land cover are likely influencing the observed microplastic concentrations and fluxes. The variability between both sampling systems cannot fully be explained by the different mesh sizes used. We argue that differentiation between a theoretical cut-off size (finest mesh) and a factual cut-off size (reliable quantification) can help to understand sampling related differences between studies.

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Section: Discussionmentioning

confidence: 99%

Microplastic concentrations, characteristics, and fluxes in water bodies of the Tollense catchment, Germany, with regard to different sampling systems

Tamminga

Hengstmann

Deuke

et al. 2021

Environ Sci Pollut Res

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“…2. ), which was lower than that in Wei River (3.67 -10.7 items/L) [8] , Pearl River (0.379 -7.924 items /L) [11] , and West River (2.99 -9.87 items /L) [12] , and higher than in the Yulin River (1.3 × 10 -2 items /L) [13] , Tuojiang River (0.912 ± 0.2 -3.40 ± 0.707 items /L) [14] , and Han River (0 -4.29 × 10 -2 items /L) [15] . On the whole, Wei River microplastics pollution level in the medium level of pollution.…”

Section: Abundance Of Microplasticsmentioning

confidence: 62%

“…Except for 0.06 -0.1mm, the smaller the particle size, the larger the proportion. Through comparison, it is found that 0.1-0.5mm microplastics also occupy a large proportion in other rivers, such as Wei River (< 0.5 mm, 68.1%) [8] , Hai River (0.1 -1 mm, 54.1%) [10] , Yulin River (0.064 ~ 0.25 mm, > 80%) [13] , Fengshan River (0.05 -0.297 mm, > 60%) [3] , and Han River (0.1 -1 mm, > 90%) [15] , which reflects the common characteristics of microplastics in rivers: microplastics with a particle size of 0.1 -0.5mm have the largest content in rivers.…”

Section: Characteristic Of Microplasticsmentioning

confidence: 99%

Microplastics in surface waters of the Wei River, China

Jiao

Chen

et al. 2021

E3S Web Conf.

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Microplastics are a new type of persistent organic pollutants, usually on the micron scale. In this study, we investigated the abundance, distribution, and other characterization of microplastics in surface waters of the Wei River Basin in the Shandong peninsula. The results showed that the abundance of microplastics in the surface water of Wei River varied from 0.40 to 1.20 items/L, and the average abundance was 0.81 items/L, which was at a moderate pollution level compared with other rivers. It was found that the abundance of microplastics was higher in densely populated areas, and hydrodynamic conditions such as river inflow and seawater scour also affected the abundance of microplastics. Fiber (83.4%) was the dominant type. Colorless (93.6%) was the dominant color type. The particle size (0.06 - 0.5mm) (47.9%) was the main size of microplastics in the Wei River. This study provides data for the further study of microplastics in rivers and provides a warning for the management and prevention of microplastics in freshwater.

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Section: Pump Samplers and Grab Samplesmentioning

confidence: 99%

“…Pump sampling consist of pumping water manually or using a motor through an inline filter. Grab sampling method includes using a bucket to collect water and sieve the water in the field (Han et al 2020 ; Miller et al 2017 ; Y. Mao et al 2020a ). A fixed amount of bottle is also submerged, filling with surface water for laboratory analysis (Barrows et al 2018 ; Dubaish and Liebezeit 2013 ).…”

Section: Sampling Procedures and Toolsmentioning

confidence: 99%

Microplastic sampling techniques in freshwaters and sediments: a review

Razeghi

Hamidian

et al. 2021

Environ Chem Lett

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Pollution by microplastics is of increasing concern due to their ubiquitous presence in most biological and environmental media, their potential toxicity and their ability to carry other contaminants. Knowledge on microplastics in freshwaters is still in its infancy. Here we reviewed 150 investigations to identify the common methods and tools for sampling microplastics, waters and sediments in freshwater ecosystems. Manta trawls are the main sampling tool for microplastic separation from surface water, whereas shovel, trowel, spade, scoop and spatula are the most frequently used devices in microplastic studies of sediments. Van Veen grab is common for deep sediment sampling. There is a need to develop optimal methods for reducing identification time and effort and to detect smaller-sized plastic particles.

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Distribution and characteristics of microplastics in the Yulin River, China: Role of environmental and spatial factors

Cited by 81 publications

References 46 publications

Microplastic concentrations, characteristics, and fluxes in water bodies of the Tollense catchment, Germany, with regard to different sampling systems

Microplastic concentrations, characteristics, and fluxes in water bodies of the Tollense catchment, Germany, with regard to different sampling systems

Microplastics in surface waters of the Wei River, China

Microplastic sampling techniques in freshwaters and sediments: a review

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