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61,005 resultsShowing papers similar to Characteristics of microplastics in tributaries of the upper Brahmaputra River along the Himalayan foothills, India
ClearMicroplastics pollution in the Brahmaputra River and the Indus River of the Indian Himalaya
Researchers sampled shoreline sediments of the Brahmaputra and Indus Rivers in the Indian Himalayas and found microplastics at all sites, with concentrations increasing downstream toward more populated areas, representing some of the first MP data for major Himalayan river systems.
Microplastics and heavy metal contamination along a land-use gradient in a Himalayan foothill river: Prevalence and controlling factors
Researchers mapped microplastic and heavy metal contamination in a river flowing through India's Himalayan foothills, finding plastic particles at every sampling site. Concentrations were highest near industrial areas and human settlements, with polyethylene and polystyrene being the most common plastic types. The study shows how human activity drives plastic pollution even in relatively remote freshwater environments.
Abundance and characteristics of microplastics in a freshwater river in northwestern Himalayas, India - Scenario of riverbank solid waste disposal sites
Researchers measured microplastic contamination in the Jhelum River in the Himalayas near garbage dump sites, finding an average of about 1,474 particles per cubic meter. Fibers and fragments from everyday plastics like polyethylene and polypropylene were the most common types found. The study shows that even remote freshwater sources used for drinking and irrigation are contaminated with microplastics, raising concerns for the communities that depend on them.
Microplastic in upper Himalayan Ganga river: Occurrence, seasonal dynamics and ecological risk
Researchers quantified microplastics at 19 sites across the upper Himalayan Ganga River over six months, finding concentrations of 100–1,550 particles per liter in water and rising contamination levels downstream toward densely populated cities, with fibers, polyethylene, and post-monsoon conditions dominating the pollution profile.
Source, Identification, Distribution, and Abundance of Microplastics in Rivers and Their Ecological Impacts: a Review
This review synthesizes global data on microplastic sources, identification methods, distribution in rivers, and ecological impacts, covering studies from the past two decades. It finds MPs widespread in riverine systems (up to 120 MPs/L in water, 13,607 MPs/kg in sediment), with FTIR and Raman spectroscopy as dominant identification tools and PE/PP fibers and fragments as the most common polymer types.
First report on microplastics in tributaries of the upper Ganga River along Dehradun, India: Quantitative estimation and characterizations
Researchers quantified microplastics in tributaries of the upper Ganga River near Dehradun, India, finding significant contamination in both water and sediments dominated by fibers and fragments, providing the first baseline data for this ecologically important region.
Baseline Study on Microplastics in Indian Rivers under Different Anthropogenic Influences
Researchers collected microplastic samples from Indian rivers under different levels of anthropogenic influence and found MPs in all sites, with concentrations correlating with population density and industrial activity, providing one of the first systematic field datasets for major Indian river systems.
Investigation of microplastic contamination in the sediments of Noyyal River- Southern India
Researchers documented microplastic contamination across 15 sites in the urban Noyyal River in southern India, finding concentrations up to 6,500 particles per cubic meter in dried sediments, with fragments and fibers in a variety of colors the most common forms.
Comprehensive study of the microplastic footprint in the urban pond and river of Eastern India
Scientists measured microplastic contamination in an urban river and pond in Eastern India and found concerning levels of 59-100 particles per liter in water and 167-193 particles per gram in sediment, with risk assessments showing crisis-level pollution. The dominant plastics found -- nylon and polyethylene -- come from everyday products, and the high contamination levels in these freshwater sources pose risks to the communities that depend on them.
Characteristics and spatial distribution of microplastics in the lower Ganga River water and sediment
Researchers sampled microplastics in water and sediment at five cities along India's Ganga River, finding concentrations of 17–36 items/kg in sediment and 380–684 items/1000 m in water, with white film-shaped polyethylene particles as the dominant type.
Occurrence, quantification and characterisation of microplastics in Godavari River, India
Researchers measured microplastic concentrations in the Godavari River in India, finding an average of 3.9 particles per liter across six sites, with fibers making up over 80% of particles and polypropylene and polyethylene being the most common polymer types. Urban areas had higher concentrations, and the presence of these plastics in a major river system poses risks to agriculture and human health through contaminated water and food sources.
Assessment of Upstream and Downstream Surface Water Microplastic Pollution in Lower Himalayan Gaula River, Uttarakhand, India
A survey of surface water in the Gaula River, Uttarakhand, India found microplastics at four upstream and four downstream sites, characterizing the particles' size, shape, color, and polymer type to establish a baseline for understanding how human activity along the river affects MP concentrations.
Flood-induced variation and source apportionment of microplastics in Jia Bharali River of mid-Brahmaputra Valley, India
A study of the Jia Bharali River in India found that post-flood microplastic concentrations were highest (27.94 MPs/L in surface water), with fibers dominating before floods and fragments after, indicating floods significantly redistribute microplastics in freshwater systems.
Microplastics in the River Ganga and its fishes: Study of a Himalayan River
This study investigated microplastic contamination in water, sediment, and fish in the upper stretch of the River Ganga in Uttarakhand, India, providing baseline data on microplastic distribution in a Himalayan river reach previously unstudied.
Microplastic pollution differences in freshwater river according to stream order: Insights from spatial distribution, annual load, and ecological assessment
Researchers compared microplastic pollution levels in a freshwater river across different land-use zones, finding higher concentrations near urban and agricultural areas than in forested regions. Fiber-type microplastics were predominant across all sampling locations.
Microplastics as a contaminant in Indian riverine system: a review
This systematic review examines microplastic contamination across India's river systems, documenting the types, sources, and concentrations of plastic particles found in major waterways. The findings are concerning for human health because these rivers provide drinking water and irrigation for hundreds of millions of people, creating widespread potential exposure to microplastics.
Assessment of microplastic contamination in the gastrointestinal tracts of indigenous fishes from north eastern hill regions of Bhogdoi, a tributary of River Brahmaputra, India
Researchers assessed microplastic contamination in the digestive tracts of freshwater fish from the Bhogdoi River in northeast India. The study found that all 180 fish examined contained microplastics, with fibers and fragments in the 100-500 micrometer range being most common, and herbivorous species showing the highest accumulation. Evidence indicates that polyamide and polypropylene were the most prevalent polymer types, providing baseline data on microplastic ingestion by fish in the Brahmaputra tributary system.
Assessment, characterization, and quantification of microplastics from river sediments
Researchers assessed microplastic contamination in sediments from 14 sites along the Kaveri River in South India, characterizing particle types, sizes, and polymer compositions to quantify the extent of microplastic pollution in this freshwater system.
The abundance and characteristics of microplastics in surface water in the transboundary Ganges River
Researchers conducted the first investigation of microplastic abundance along a 2,575-kilometer stretch of the Ganges River across pre- and post-monsoon seasons. The study found that fibers comprised 91% of microplastics, with higher concentrations before the monsoon, and estimates that the combined Ganges-Brahmaputra-Meghna river system could release 1 to 3 billion microplastic particles into the Bay of Bengal every day.
Investigation of Microplastics and Microplastic Communities in Three Waterbody Basin Soils of Thiruvananthapuram District, Kerala, India
A survey of three waterbody basin soils in Kerala, India found microplastics in all samples, with particle shapes including flakes, fragments, filaments, and fibers ranging from 0.3 to 4.7 mm. The polymers identified — HDPE, LDPE, PP, PET, PS, and nylon — reflect common plastic waste, with the highest concentrations near urban areas, indicating land-based human activity as the primary contamination source.
Abundance and Distribution of Microplastics in the Water and Riverbank Sediment in Malaysia – A Review
Microplastic abundance and distribution were surveyed in the water column and riverbank sediments of a Malaysian river. Results showed microplastics throughout the river system, with fiber shapes dominating in water and fragments more common in sediments, reflecting contributions from domestic wastewater and plastic litter.
Microplastic pollution in the Himalayas: Occurrence, distribution, accumulation and environmental impacts
This review documents microplastic contamination throughout the Himalayan region, from mountain glaciers and rivers to remote high-altitude locations. Microplastics reach these areas through wind, precipitation, tourism waste, and river transport, and can become trapped in glacial ice before being released during snowmelt. The findings show that even one of the most remote places on Earth is not free from microplastic pollution, with implications for the billions of people who depend on Himalayan rivers for drinking water.
Characterization and spatial distribution of microplastics in Surma river, Bangladesh: Assessing water and sediment dynamics
Researchers characterized the abundance, distribution, and types of microplastics in the water and sediments of the Surma River in Bangladesh. They found widespread microplastic contamination, with fibers being the dominant particle shape, linked to nearby textile and urban sources. The study provides baseline data on microplastic pollution in a major South Asian river system and highlights the need for mitigation strategies.
Investigation of microplastics and microplastic communities in selected river and lake basin soils of Thiruvananthapuram District, Kerala, India
A survey of three waterways in Thiruvananthapuram, India found microplastics in every sediment sample tested, with up to 799 particles per kilogram in the most urbanized river. Common household and packaging plastics — polyethylene, polypropylene, PET, and polystyrene — dominated the finds, with higher particle counts near city centers, pointing to urban runoff as the main delivery route into aquatic ecosystems.