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61,005 resultsShowing papers similar to Distribution and flux assessment of microplastic debris in the middle and lower Chao Phraya River, Thailand
ClearSeasonal effects, spatial distribution, and possible sources of microplastics in the Chao Phraya River estuary, Thailand
This study tracked microplastic abundance and distribution in the Chao Phraya River estuary in Thailand across dry and wet seasons. Plastic levels varied significantly by season and location, with the estuary serving as a key pathway for plastic debris entering the marine environment.
Microplastics Contamination in a High Population Density Area of the Chao Phraya River, Bangkok
This study measured microplastic concentrations in surface water and sediment from a densely populated stretch of the Chao Phraya River in Bangkok, finding particles at all sites with higher levels in sediment than in water. Bangkok's high population density and inadequate plastic waste management are major contributors to microplastic contamination in this major urban river.
Spatial and temporal variations of microplastics in the lower Chao Phraya River, Thailand: an investigation during the COVID-19 pandemic period
Researchers systematically measured microplastics in the lower Chao Phraya River, Thailand, during the COVID-19 pandemic period across spatial and temporal gradients. Average MP abundance was 8.3 ± 5.8 particles/m, dominated by PE and PP fibers and fragments, with higher concentrations downstream in urbanized areas and slight seasonal elevation in wet season runoff.
Microplastic Distribution in River Sediment: a Case Study at U-taphao, Southern Thailand
A study of the U-Taphao River in southern Thailand found microplastics — mostly fibers and fragments — at all seven sampling stations from upstream to downstream over four months. The upstream-to-downstream distribution pattern suggests multiple sources of plastic pollution entering the river along its length.
Microplastic contamination on the lower Chao Phraya: Abundance, characteristic and interaction with heavy metals
Researchers investigated microplastic abundance, characteristics, and heavy metal interactions in water and sediment samples from the lower Chao Phraya River in Thailand, collecting samples via manta trawl and sediment grab. The study documented the distribution and polymer types of microplastics in a Southeast Asian river and examined their capacity to carry associated heavy metal contaminants.
Contamination and characterization of microplastics in different sediments of the river estuaries (the inner Gulf of Thailand)
Researchers measured microplastic contamination in river estuary sediments in the inner Gulf of Thailand, finding widespread contamination at all sites. The study characterizes the types and abundance of microplastics in a highly trafficked coastal region of Southeast Asia.
Assessment of microplastic contamination in the urban lower Chao Phraya River of Bangkok city, Thailand
Researchers collected microplastics from five sites along the Chao Phraya River in Bangkok using a Manta net and identified polymers via FTIR, finding average concentrations of 21 particles/m3 with polypropylene dominant and highest counts at midstream urban sites, indicating that single-use plastic packaging degradation is a primary source of riverine microplastic pollution in this urban corridor.
Occurrence of microplastics and ecological risk assessment during tidal changes in the Chao Phraya River estuary, Thailand
This study was the first to assess how tidal changes affect microplastic concentrations in the Chao Phraya River estuary in Thailand, finding abundances ranging from 1.37 to 4.51 pieces per liter across the tidal cycle. Fibers and fragments dominated, with ecological risk assessed as moderate.
Occurrence and spatial distribution of microplastic contaminated with heavy metals in a tropical river: Effect of land use and population density
Researchers studied microplastic pollution in Thailand's Chao Phraya River and found that population density and land use strongly influence contamination levels. Urban areas had the highest microplastic concentrations, and many particles were contaminated with heavy metals. The findings suggest that microplastics in rivers can serve as carriers of toxic metals, compounding the pollution risk for downstream communities.
Spatial and temporal variations of microplastics in the Bangpakong River of Chachoengsao province
This study monitored microplastic concentrations in the Bangpakong River in Thailand across different seasons and sampling locations, providing baseline data on freshwater microplastic contamination. As a major freshwater source, the river's microplastic pollution has implications for drinking water quality and aquatic ecosystem health.
Microplastic Pollution in High Population Density Zones of Selected Rivers from Southeast Asia
Researchers compared microplastic pollution in three major Southeast Asian rivers, the Chao Phraya in Thailand, the Saigon River in Vietnam, and the Citarum River in Indonesia, all in densely populated urban areas. Microplastics were found at every sampling site, with the highest levels in Thailand's river. Since these rivers supply water for drinking, agriculture, and fishing for millions of people, the contamination directly affects human microplastic exposure in the region.
Influence of seasonal variations on the distribution characteristics of microplastics in the surface water of the Inner Gulf of Thailand
Researchers sampled surface water across 70-74 sites in the Inner Gulf of Thailand in both dry and wet seasons, finding microplastic concentrations 4 times higher in the wet season (34.59 pieces/L) than the dry season (8.70 pieces/L). River discharge was identified as the key driver of microplastic input to the coastal sea, and polypropylene and polyethylene were the dominant polymers.
Unraveling microplastic pollution patterns in sediments of a river system: The combined impacts of seasonal changes and waterway differences
Microplastic concentrations in Saigon River and tributary sediments ranged from 140 to 1,200 items/kg, with fiber particles dominant; rainy season flows from tributaries elevated microplastic levels, while the main river showed more dilution effects.
Small microplastic particles dominate Yangtze River particulate pollution
Annual field monitoring of microplastic fluxes in the Yangtze River estuary found that small particles dominated the plastic load and that abundance was spatially and temporally heterogeneous, providing the first systematic estimate of the river's annual plastic contribution to the ocean.
Horizontal variation of microplastics with tidal fluctuation in the Chao Phraya River Estuary, Thailand
Microplastic concentrations and composition in the Chao Phraya River Estuary in Thailand varied with tidal cycle, with flood tides increasing marine-sourced particles and ebb tides flushing river-derived fragments, showing that tidal dynamics must be accounted for in estuarine microplastic sampling designs.
Spatiotemporal dynamics and tidal transport of microplastics in the tropical waters of the Gulf of Thailand
Researchers tracked microplastic contamination from the Chumphon River through the coastal Gulf of Thailand, including in farmed green mussels, finding that river systems carried higher microplastic loads than coastal waters. In the water column, low-density polymers dominated near the surface while high-density plastics increased with depth, and fibers made up 95% of particles in river water. Green mussels contained shorter fibers matching their surrounding environment, confirming that freshwater runoff from human activities is a major source of coastal microplastic pollution.
Microplastic contamination in the Chanthaburi estuarine ecosystem, Eastern part of Thailand
Researchers surveyed microplastic contamination in the Chanthaburi estuarine ecosystem in eastern Thailand, measuring particle concentrations and types in water, sediment, and selected biota. Microplastics were detected throughout the estuary, with fibres predominating and concentrations highest near shrimp farms and urban areas, pointing to aquaculture and land-based waste as primary local sources.
Occurrence of Microplastics in River Water in Southern Thailand
Researchers monitored microplastic levels in the U-Taphao River in southern Thailand across four sampling periods in 2022. Microplastic concentrations ranged from 0.24 to 0.41 particles per liter, with fibers being the dominant type found at over 80% of sampling stations, and concentrations generally declining from upstream to downstream.
Microplastics pollution in selected rivers from Southeast Asia
Researchers surveyed microplastic pollution in rivers across Southeast Asia, a region with high plastic waste discharge but limited monitoring data, documenting the distribution and characteristics of microplastics in these understudied waterways.
Small microplastic particles dominate Yangtze River particulate pollution
Researchers conducted annual monitoring of plastic particle fluxes in the Yangtze River estuary, finding that small microplastic particles dominate particulate pollution and that their distribution varies significantly by location and season, with important implications for estimating riverine plastic inputs to the sea.
The seasonal variation and ecological risk of microplastics in the Lower Ganges River, Bangladesh
Researchers characterized seasonal variation in microplastic abundance and polymer composition in the lower Ganges River, finding that monsoon flows dramatically increase microplastic loads and that dry season concentrations reflect local urban pollution.
Occurrence and abundance of microplastics in surface water of Songkhla Lagoon
Researchers surveyed microplastic contamination in the surface waters of Songkhla Lagoon in Thailand and found microplastics at all sampling sites. Small fibers under 500 micrometers were the most abundant type, with rayon and polyester being the dominant polymer materials. The findings indicate that this important coastal lagoon system is widely affected by microplastic pollution from surrounding urban and industrial sources.
Abundance, composition, and fate of microplastics in water, sediment, and shellfish in the Tapi-Phumduang River system and Bandon Bay, Thailand
Researchers measured microplastic contamination in water, sediment, and shellfish across the Tapi-Phumduang River system and Bandon Bay in Thailand, finding MPs throughout the system with highest concentrations in shellfish harvested from aquaculture areas and estimating human intake through local seafood consumption.
Spatiotemporal distribution and annual load of microplastics in the Nakdong River, South Korea
Microplastics were measured seasonally and spatially throughout the Nakdong River in South Korea, finding 293–4,760 particles/m³ in water and 1,970 particles/kg in sediment, with concentrations three times higher at the surface than mid-water in downstream areas and an estimated annual load of 15.45 billion particles to the sea. The study provides comprehensive temporal and spatial microplastic flux data for a major Korean river.