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Urban and highway surfaces discharge polluted runoff during storm events. To mitigate environmental risks, stormwater retention ponds are commonly constructed to treat the runoff water. This study is the first to quantify the retention of microplastics in the sediments of such ponds. It applied state-of-art FTIR-methods to analyse the composition, size, shape, and mass of microplastics in the range 10-2000 μm. Seven ponds serving four land uses were investigated, and the results are related to catchment characteristics, sediment organic matter content, and hydraulic loading. We have not found a correlation between the microplastics abundance, polymer composition, size distribution and the land use in the catchment, as well as the sediment organic matter content. Both the highest (127,986 items kg; 28,732 μg kg) and the lowest (1511 items kg; 115 μg kg) accumulation of microplastics were found in the sediments of ponds serving industrial areas. There was, however, a correlation to the hydraulic loading of the ponds, where the sediments of the highest-loaded ponds held the most microplastics. This study shows that sediments in stormwater retention ponds can trap some of the microplastics and prevent them from being transported downstream. These systems need to be considered when assessing the fate of microplastics from urban and highway areas.
This article was published in the following journal.
Name: Environmental pollution (Barking, Essex : 1987)
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The objective of the Charlotte Retention in Care study is to assess if clinical decision support systems (CDSS) that produce standardized alerts for measures of retention in care across cl...
Postpartum urinary retention is an uncommon complication of the vaginal delivery. Failure to diagnose it may have a real impact both on the urinary plane but also on the psychological leve...
The aim of this study is to assess the influence of this particular treatment method on the patients' quality of life and masticatory function.
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The retention of a denture in place by design, device, or adhesion.
The retention of a dental prosthesis in place by design, device, or adhesion.
A true cyst of the PANCREAS, distinguished from the much more common PANCREATIC PSEUDOCYST by possessing a lining of mucous EPITHELIUM. Pancreatic cysts are categorized as congenital, retention, neoplastic, parasitic, enterogenous, or dermoid. Congenital cysts occur more frequently as solitary cysts but may be multiple. Retention cysts are gross enlargements of PANCREATIC DUCTS secondary to ductal obstruction. (From Bockus Gastroenterology, 4th ed, p4145)
Accumulation or retention of free fluid within the peritoneal cavity.
The retention in the UTERUS of a dead FETUS two months or more after its DEATH.
Standard antiretroviral therapy (ART) consists of the combination of at least three antiretroviral (ARV) drugs to maximally suppress the HIV virus and stop the progression of HIV disease. Huge reductions have been seen in rates of death and suffering whe...