We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Anthropogenic influences on seasonal microplastic dispersion in the Pasur River of Bangladesh based on field observations and numerical simulation
AI summary Read the abstract
Scientists found tiny pieces of plastic pollution in a major river in Bangladesh, with the highest levels near busy ports where human activities are concentrated. During dry seasons, these microplastics stay trapped in the river for long periods, but during monsoon season they get washed out to the ocean within 10 days. This matters because microplastics can enter our food and water supply, and understanding when they build up in rivers can help communities plan better waste management to protect public health.
Microplastics are a growing concern in the contemporary world. Many regions of the world are on the way to combat it. Unfortunately, research in Bangladesh has yet to advance. This study assessed the spatial distribution of microplastics and used the MIKE 21 Particle Tracking Module to depict its seasonal variations within the Pasur River, whose flow presents a marked influence from both the tidal cycle and river discharge. In-situ measurements revealed the highest concentration of microplastics at 11944.44 ± 294.07 MP/m3 near the Mongla port, implying the impact of anthropogenic activities. Six morphotypes of microplastics were identified, with fiber (52%) being the most dominant. Almost three-fourths of the particles were (> 1 mm) in size, and colored particles were more prevalent (54%). A total of seven types of polymers were identified through ATR-FTIR spectroscopy, with polypropylene (PP) (40%) and polyethylene (PE) (26.67%) being the most abundant. The ecological risk assessment (ERA) revealed moderate to high pollution levels with PLIzone = 1.43, NPI ≈ 2.00, and PHI = 819.15. Furthermore, the MIKE 21 particle tracking module portrayed that due to high river discharge in monsoon (September), all the particles were washed out within 10 days from the Pasur River to the ocean. In contrast, during the dry season (January), which has a low discharge rate, most of the particles were retained in the river. The persistent presence of microplastics during the dry season is a major finding that will provide policymakers with a blueprint for initiating waste management programs.
More Papers Like This
Anthropogenic Impacts and Seasonal Dispersion of Microplastics in the Pasur River, Bangladesh: Insights from Field Data and Numerical Simulation
AI summary Read the abstract
Researchers assessed the spatial distribution of microplastics in the Pasur River in Bangladesh using field sampling and MIKE 21 numerical particle tracking simulation, identifying seasonal and anthropogenic drivers of microplastic dispersion in an understudied South Asian river system.
The seasonal variation and ecological risk of microplastics in the Lower Ganges River, Bangladesh
AI summary Read the abstract
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.
Monsoon-driven spatio-temporal dynamics of microplastics in Brahmaputra riverbank sediments: Quantification using spectroscopic, pollution index and multivariate analysis
AI summary Read the abstract
Scientists studying India's Brahmaputra River found that tiny plastic bits called microplastics—mostly from clothing fibers, packaging, and household waste—build up more heavily near cities and spike dramatically when monsoon rains wash debris into the water. These plastics eventually make their way into fish and drinking water sources, so understanding when and where they accumulate most helps communities and regulators target cleanup efforts and reduce human exposure to this pollution.
Seasonal Dynamics of Microplastic Pollution in the River Ganga: A Case Study from Bihar
AI summary Read the abstract
Researchers sampled microplastics at three locations along the Ganga River in Bihar, India, comparing concentrations before and after the monsoon season. Pre-monsoon levels averaged 1,045 particles per sample versus 624 post-monsoon, with higher dry-season concentrations attributed to reduced river flow and concentrated human activity near the riverbanks.
Spatio-temporal characteristics of microplastics in river surface water: insights from multi-year field monitoring.
AI summary Read the abstract
Researchers sampled river water across two years and four seasons to study tiny plastic particles. Microplastic counts were higher in dry seasons than rainy seasons, mainly because higher water flow diluted them, and city pollution sources created persistent hotspots. Flux (the total amount moving through the river) and discharge showed a linear relationship.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.