The occurrence of microplastics in water bodies in urban agglomerations: Impacts of drainage system overflow in wet weather, catchment land-uses, and environmental management practices

Chen, Hao; Jia, Qiang; Zhao, Xin; Li, Lei; Nie, Yun-Han; Liu, Hui; Ye, Jianfeng

doi:10.1016/j.watres.2020.116073

Cited by 112 publications

(39 citation statements)

References 58 publications

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“…The abundance of bers in the water samples coincides with the ndings of Jiang et al,( 2019) for some rivers in the Tibetans Plateau where bers ranged from 60 to 90% who linked the presence of microplastics to residential activities as the area was based in industry free and no shing activities conducted. subsequently, fragments were the second in dominance in most of the collected samples depicting similar trend with other studies conducted in rivers (Chen et al, 2020), fragments have been described as the secondary sources associated the photo-degradation and mechanical actions of primary sources of solid and domestic wastewater (Jiang et al, 2019Kataoka et al, 2019. Microbeads were not observed in the water columns in the present study except at one location at Naura tributary and a handful were found in the sediments, their absences in water column would be attribute to it high density and the surface area enabling its sinking in sediment.…”

Section: Morphology Of Microplasticssupporting

confidence: 89%

“…Several studies have assessed the extent and effect of macro-and microplastics pollution in riverine systems and the surrounding environment; Kataoka et al, (2019) showed that there is a signi cant correlation between the concentration of microplastics and the population density of an area and the concentration of macro-and microplastics in rivers are related to behaviors of the local people and waste management practices (Ra que et al, 2020). Moreover, the longitudinal distribution of microplastics in water columns is often associated with the land use and hydrodynamics of an area (Chen et al, 2020), while the quantity of macroplastics loading into river systems is related to the concentration of microplastics in a riverine environment (Lahens et al, 2018), and the number of microplastics often tends to increase downstream (Mani et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of macro-and microplastics in the water, soil/sediment in riverine, riverbanks and irrigated farms in Arusha Tanzania

Kundu

Komakech

Lugomela³

2021

Preprint

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Microplastics and macroplastics have been reported in different urban rivers and agricultural soil across the globe. However, the interlink between them has not been previously assessed therefore, the present study evaluated the relationship between macro-and microplastics in the water columns and sediments in riverine, riverbanks, and soils from irrigated farms in Arusha, Tanzania. Detached pieces from macroplastics and suspected particles of microplastics from the samples were analyzed using the total attenuated reflectance - Fourier transform Infrared spectroscopy, where statistical analysis showed that the number of microplastics in the sediments was higher than in the water columns and that in irrigated farms than in the riverine by a magnitude of 4. Besides, the numbers of microplastics and macroplastics in the irrigation farms were exponentially-related while the macroplastics from the riverbanks had an inverse relationship with the rivers’ profile elevation. Polyethylene was the dominating macroplastic in the riverbanks and irrigated farms with a 100% frequency of occurrence while polystyrene was abundant in all samples of microplastics. However, the irrigated farms adjacent to canals had a greater number of microplastics and macroplastics. In generally, the findings showed a similar trend of plastic distribution in urban rivers and irrigated farms, suggesting an interaction between them.

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Section: Morphology Of Microplasticssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Analysis of macro-and microplastics in the water, soil/sediment in riverine, riverbanks and irrigated farms in Arusha Tanzania

Kundu

Komakech

Lugomela³

2021

Preprint

View full text Add to dashboard Cite

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“…Although the land use analyses conducted here were relatively simplistic, there are indications that land use types and activities may be influencing the MP typology, particularly in relation to surface waters where the diversity of MP types increased with increased levels of disturbance (Figure 5a). Other studies have shown that varying land uses around coastal systems represent heterogenous sources of pollution, and can help in understanding the MP profile of these systems [49]. In the present study, MP concentrations in water and mangrove sediment were highest in the system impacted by industrial + residential + agricultural land uses (Isipingo), and this was followed by systems impacted by residential + recreational (uMgeni); heavy industrial + maritime (Durban Harbour); and limited residential + tourism activities (St. Lucia).…”

Section: Disturbance and The Presence Of Plasticsmentioning

confidence: 99%

Towards Characterising Microplastic Abundance, Typology and Retention in Mangrove-Dominated Estuaries

Govender

Naidoo

Rajkaran

et al. 2020

Water

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Plastic and, particularly, microplastic (MP) pollution is a growing research theme, dedicated largely to marine systems. Occurring at the land–sea interface, estuarine habitats such as mangroves are at risk of plastic pollution. This study compared MP pollution (level, morphotype, polymer composition, size and colour) across four South African estuaries, in relation to the built and natural environment. Mouth status, surrounding human population densities and land-use practices influenced the level and type of MP pollution. Systems that were most at risk were predominantly open estuaries surrounded by high population densities and diverse land use types. Microplastic levels and the diversity of types detected increased with increasing levels of anthropogenic disturbance. Overall, microfibres dominated in estuarine water (69%) and mangrove sediment (51%). Polyethylene (43%) and polypropylene (23%) were the dominant polymers overall. Weathered fishing gear, weathered packaging items and run-off from urban/industrial centres are probable sources of MP pollution . Increased run-off and river input during the wet/rainy season may explain the markedly higher MP loads in estuarine waters relative to the dry season. By contrast, MP deposition in mangrove sediment was higher during the dry season. Sediment MP abundance was significantly positively correlated with both pneumatophore density and sediment size (500–2000 µm). This study highlights the role of mangroves as MP sinks, which may limit movement of MPs into adjacent environments. However, under conditions such as flooding and extreme wave action, mangroves may shift from sinks to sources of plastic pollution.

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“…Textile fibres released by clothes washing, and other primary microparticles (e.g., microbeads), are primarily sourced from the effluent of WwTW [27] and can accumulate in large numbers even after wastewater treatment simply because of the sheer volumes of water that are processed [28]. However, empirical studies typically test the influence of catchment characteristics on microparticle concentrations in a relatively local region and cannot be compared easily because they used different methodologies (e.g., [24,25,[29][30][31][32]). Understanding why microparticles are more abundant in some places than others requires standardised sampling across large environmental gradients, such as in land use, topography, and hydrology.…”

Section: Introductionmentioning

confidence: 99%

Microplastics and anthropogenic fibre concentrations in lakes reflect surrounding land use

et al. 2021

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Pollution from microplastics and anthropogenic fibres threatens lakes, but we know little about what factors predict its accumulation. Lakes may be especially contaminated because of long water retention times and proximity to pollution sources. Here, we surveyed anthropogenic microparticles, i.e., microplastics and anthropogenic fibres, in surface waters of 67 European lakes spanning 30° of latitude and large environmental gradients. By collating data from >2,100 published net tows, we found that microparticle concentrations in our field survey were higher than previously reported in lakes and comparable to rivers and oceans. We then related microparticle concentrations in our field survey to surrounding land use, water chemistry, and plastic emissions to sites estimated from local hydrology, population density, and waste production. Microparticle concentrations in European lakes quadrupled as both estimated mismanaged waste inputs and wastewater treatment loads increased in catchments. Concentrations decreased by 2 and 5 times over the range of surrounding forest cover and potential in-lake biodegradation, respectively. As anthropogenic debris continues to pollute the environment, our data will help contextualise future work, and our models can inform control and remediation efforts.

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The occurrence of microplastics in water bodies in urban agglomerations: Impacts of drainage system overflow in wet weather, catchment land-uses, and environmental management practices

Cited by 112 publications

References 58 publications

Analysis of macro-and microplastics in the water, soil/sediment in riverine, riverbanks and irrigated farms in Arusha Tanzania

Analysis of macro-and microplastics in the water, soil/sediment in riverine, riverbanks and irrigated farms in Arusha Tanzania

Towards Characterising Microplastic Abundance, Typology and Retention in Mangrove-Dominated Estuaries

Microplastics and anthropogenic fibre concentrations in lakes reflect surrounding land use

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