We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Assessment of bisphenol A analogues in water and sediment of an urban river system in Dhaka, Bangladesh: a regionally focused environmental investigation
AI summary Read the abstract
Researchers measured four bisphenol A analogues in water and sediment of the Turag River in Dhaka, Bangladesh across two seasons, finding bisphenol F as the dominant contaminant at concentrations up to 7.3 μg/L in water and 234 μg/g in sediment, raising concerns about endocrine-disrupting chemical exposure in a densely populated urban waterway.
Bisphenol A analogues (BPs), now commonly replacing BPA in industrial applications, are emerging contaminants of concern due to their pervasive environmental presence and possible endocrine-disrupting effects. Further research is needed to elucidate their ecological implications. Although their production and application have expanded rapidly, comprehensive data regarding their occurrence, spatial distribution, correlations, and environmental distribution remain limited. BPs are almost unreported in the environmental matrices in Bangladesh. Herein, a total of 120 samples (80 from water and 40 from sediment) were analyzed for four BPs (bisphenol B, bisphenol E, bisphenol F, bisphenol AF) in two seasons (rainy and winter) from the Turag River in Dhaka City, Bangladesh. GC-MS was used to determine the BPs in water and sediment samples. In the case of water samples in the rainy season, the results indicated that BPF was the predominant BP, which ranged from 1.3950 to 7.2352 μg L-1, followed by BPAF (0.3222 to 6.9578 μg L-1), BPB (0.3046 to 2.5262 μg L-1) and BPE (0.3230 to 1.8309 μg L-1). Water samples in the winter season also indicated BPF as the predominant BP, which ranged from 1.1186 to 7.3094 μg L-1, followed by BPB (0.0387 to 9.2240 μg L-1), BPAF (0.3497 to 5.9782 μg L-1) and BPE (0.5280 to 3.5314 μg L-1). However, in sediment samples, BPF was found in the range from 27.2740 to 234.4540 μg g-1 dw, followed by BPAF (56.3560 to 129.1900 μg g-1 dw), BPB (24.3860 to 141.4120 μg g-1 dw) and BPE (3.7340 to 33.8920 μg g-1 dw). A significant seasonal influence was observed in the occurrence of BPs in river water. Significant positive and moderate positive correlations were found in the BPs of water samples, and no significant correlations were observed in the BPs of sediment samples.
More Papers Like This
Abundance, distribution and composition of microplastics in sediment and fish species from an Urban River of Bangladesh
AI summary Read the abstract
Researchers examined microplastic contamination in both river sediment and fish from the Turag River in Bangladesh, which separates an industrial city from the capital Dhaka. They found microplastics in all sediment and fish gut samples, with fragment-type particles dominating in sediment and fibers most common in fish. The study highlights that urban rivers in densely populated areas can serve as significant conduits of microplastic exposure for both aquatic life and the people who consume river fish.
Abundance, characteristics, and ecological risks of microplastics in the riverbed sediments around Dhaka city
AI summary Read the abstract
Researchers analyzed riverbed sediments around Dhaka, Bangladesh and found medium-level microplastic pollution dominated by polyethylene, polypropylene, and PET from urban and industrial sources. All sampling sites showed pollution levels above baseline, with ecological risk assessments ranging from medium to very high depending on location. The study fills an important data gap on freshwater microplastic contamination in one of the world's most densely populated urban areas.
Seasonal assessment and characterization of microplastics in two urban (Balu) and peri-urban (Shitalakshya) rivers of Bangladesh
AI summary Read the abstract
This study assessed microplastic contamination in the Shitalakshya and Balu rivers of Bangladesh across seasons, finding that sediments contained far higher concentrations than water samples, with the Balu River reaching up to 5,673 MPs per kg of dry sediment during the dry season.
Microplastics in Sitalakhya River: Distribution and Properties Across Land Uses in Dhaka's Peripheral Waterway
AI summary Read the abstract
Researchers investigated microplastic pollution in the water and bed sediments of the Sitalakhya River on the periphery of Dhaka city, sampling four locations representing commercial, residential, industrial, and agricultural land uses and finding microplastic abundances ranging from 20 to 412 items/kg in sediment and 3 to 38 items/100L in water. The study found that land use type significantly influenced both the abundance and physical characteristics of microplastics, with industrial zones exhibiting the highest contamination levels.
Characterization, distribution, and risk assessment of microplastic in fish and sediment from the longest river of Bangladesh
AI summary Read the abstract
Researchers characterized microplastic contamination in fish and sediment from the Brahmaputra River in Bangladesh, the country's longest river. They found microplastics in all fish and sediment samples, with fibers being the most common type, and bottom-dwelling fish species containing more particles than those living near the surface. The study provides important baseline data on freshwater microplastic pollution in a major South Asian river system.
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.