Microplastic pollution in urban Lake Phewa, Nepal: the first report on abundance and composition in surface water of lake in different seasons

Malla-Pradhan, Rajeshwori; Suwunwong, Thitipone; Phoungthong, Khamphe; Joshi, Tista Prasai; Pradhan, Bijay Lal

doi:10.1007/s11356-021-18301-9

Cited by 43 publications

(10 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, site L8 is also found to have a high abundance of microplastics (100 items/kg dw). The obstructing structure like the dam (Di & Wang, 2018 ), the long narrow topography at this section of the lake (Yuan et al, 2019 ), and the drainage of domestic wastewater and runoff by Phikre Khola (stream) near this site may be the factors for higher microplastic abundance in the lake at this region (Malla-Pradhan et al, 2022 ). Another probable source of microplastics at the outlet (Site L8) during the rainy season may be runoff from urban ditches.…”

Section: Resultsmentioning

confidence: 99%

“…Although many comprehensive studies on marine habitat are conducted, less research has concentrated on the freshwater ecosystem, which are possible sources and channels for the transport of microplastic into the marine habitat (Migwi et al, 2020 ). Although in recent years, there is a rise in microplastic pollution studies in worldwide lakes (Dusaucy et al, 2021 ), Nepal is at an early phase where only a limited research on microplastic has been done (Malla-Pradhan et al, 2022 ). Therefore, in order to address poorly quantified levels of microplastic pollution in the freshwater environment of Nepal, it is necessary to study the lakes to find the level of pollution from microplastics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Occurrence and Distribution of Microplastics from Nepal’s Second Largest Lake

Malla-Pradhan

Pradhan

Phoungthong

et al. 2022

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

Due to its harmful impact on biota, microplastic pollution is the top priority research in many countries. However, there is hardly any research on microplastic pollution in Nepal’s freshwater. Therefore, the present research was accomplished in Phewa Lake to evaluate the occurrence and distribution of microplastic contamination in shoreline sediments. The average abundance of microplastic varied from 55 to 122.5 items/kg dry weight (dw). The highest value appeared on densely populated eastern side of the lake and the western region reported the lowest concentration of microplastic. With regard to the shape, fibers dominated the sediments of Phewa Lake accounting for 62.03%. The dominant color was transparent (23.53%) followed by blue (21.39%). The size category 0.2–1 mm recorded the highest abundance of microplastic. Similarly, Fourier transform infrared spectroscopy (FTIR) reveal the dominant polymer type as polypropylene (PP) and polyethylene (PE). The outcome of this result adds a step toward filling the existing knowledge gap and providing a database on microplastic pollution in Nepal’s freshwater.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Occurrence and Distribution of Microplastics from Nepal’s Second Largest Lake

Malla-Pradhan

Pradhan

Phoungthong

et al. 2022

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among the review studies Lake Kallavesi of Finland was found to have the lowest microplastic concentration of 0.27 items/m 3 [47]. Oni et al [49] studied Ox-Bow Lake in Nigeria for 2 seasons and found the level of microplastic higher in dry season than raining season which was also the case of Phewa Lake, Nepal [71] (Table 4)…”

Section: Microplastic Abundance In Lake Watermentioning

confidence: 92%

Microplastic in Freshwater Environment: A Review on Techniques and Abundance for Microplastic Detection in Lake Water

et al. 2023

View full text Add to dashboard Cite

Microplastic particles have been detected in water sources such as in oceans, lakes and rivers worldwide, which have received much attention in recent years. This review includes a summary of the analytical techniques such as sampling, processing and identification used by researchers to evaluate microplastic in lake water from 35 studies. Microplastic abundance and its morphological characteristics were also compared. Bulk sampling and volume-reduced sampling were almost equally implemented during sample collection. During sample processing, digestion were followed by 85.71 % of the researcher’s using hydrogen peroxide (H2O2) to degrade the organic matter present in the sample. Though density separation is the most common approach to extract microplastic from sediment sample, this was not the case in lake water as only 31.43 % used this method. Fibers were the most dominant shape and the maximum abundance of microplastics were found to be in < 0.5 and < 2 mm2 size class. Most studies reported microplastic to be of polyethylene (PE) and polypropylene (PP). HIGHLIGHTS Digestion is an important step during sample processing In lake water density separation is less frequently used method Fibers dominated in the size class < 0.5 and < 2 mm Microplastic in lake water is commonly expressed in volume unit GRAPHICAL ABSTRACT

show abstract

“…Abundance (particle/m 3 ) Yuejin Lake, China [8] Urban Reservoir, China [9] Urban Waters, Megacity China [19] Phewa Lake, Nepal [20] Stormwater, Greater Paris [21] Langat River, Malaysia [22] Urban Lagoon, Tunisia [23] 7050 (mean) 28.3 (mean) 4000 (max) 28.3 (mean) 2.96 (mean) 129 (max) 453 (mean) Foam, followed by sheet types, was the dominant low-density microplastic morphology observed in these studied lakes (Figures 2a, b). Lake Pluit had the highest percentage of foam accounting for >80% of all identified microplastics, while Cipondoh and Gede had more percentages of the sheet as high as 40% of all detected microplastics (Figure 2c).…”

Section: Urban Watersmentioning

confidence: 99%

The occurrence of microplastics in the surface water of several urban lakes in the Megacity of Jakarta

Henny¹,

Suryono²,

Rohaningsih³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Microplastic pollution in the marine and freshwater environment has been a global concern. The pollution in densely populated urban areas may be more severe than in any other environment, especially in areas lacking plastic waste management. Urban lakes in the Megacity of Jakarta, the capital city of Indonesia, and neighboring areas, which is the most populated city in the world, have been severely polluted by plastic waste. The urban lakes studied were located downstream of watershed areas of major rivers that outflow into Jakarta Bay, the Java Sea, and finally the ocean. To our knowledge, no studies have been reported on microplastic pollution in urban lakes in the Megacity of Jakarta. This study investigated the first occurrence of microplastics in the surface water of six urban lakes in the Megacity of Jakarta. Grab water samples were collected in either inlet or outlet areas of lakes. The water samples were pretreated and sieved to separate the microplastics. The quantification and the identification of microplastics were made using a Stereo Microscope. The most downstream urban lakes in the densely populated area close to Jakarta Bay, which is the final disposal of plastic wastes from the river canal and runoff from the surrounding area, had more microplastics than the urban lakes in the area with less population and further from the Bay. The most abundant microplastics found in the lake’s surface water was about 30,000 particles/m3, whereas 300 - 500 µm and the foam were the dominant size and type of microplastics discovered. The concern is that the smallest size of particles of microplastics found in the lake’s water could potentially contaminate aquatic biota, especially fish, not only in the lakes but also in Jakarta Bay, where fishing activities are substantial.

show abstract

Microplastic pollution in urban Lake Phewa, Nepal: the first report on abundance and composition in surface water of lake in different seasons

Cited by 43 publications

References 63 publications

Occurrence and Distribution of Microplastics from Nepal’s Second Largest Lake

Occurrence and Distribution of Microplastics from Nepal’s Second Largest Lake

Microplastic in Freshwater Environment: A Review on Techniques and Abundance for Microplastic Detection in Lake Water

The occurrence of microplastics in the surface water of several urban lakes in the Megacity of Jakarta

Contact Info

Product

Resources

About