Experimental Study on the Role of Sedimentation and Degradation Processes on Atmospheric Deposition of Persistent Organic Pollutants in a Subtropical Water Column

2017 ◽  
Vol 51 (8) ◽  
pp. 4424-4433 ◽  
Author(s):  
Yumei Huang ◽  
Ruijie Zhang ◽  
Kechang Li ◽  
Zhineng Cheng ◽  
Guangcai Zhong ◽  
...  
Keyword(s):  
Experimental Study ◽  
Atmospheric Deposition ◽  
Water Column ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Subtropical Water ◽  
Degradation Processes

Prenatal exposure to persistent organic pollutants as a risk factor of offspring metabolic syndrome development during childhood

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Marlene Cervantes González
Keyword(s):  
Metabolic Syndrome ◽  
Organic Pollutants ◽  
Prenatal Exposure ◽  
Persistent Organic Pollutants ◽  
Animal Studies ◽  
Polychlorinated Biphenyl ◽  
Environmental Pollutants ◽  
Epidemiological Studies ◽  
Experimental Findings

Abstract Persistent Organic Pollutants (POPs) are exogenous, artificially made chemicals that can disrupt the biological system of individuals and animals. POPs encompass a variety of chemicals including, dioxins, organochlorines (OCs), polychlorinated biphenyl (PCBs), and perfluoroalkyl substances (PFASs) that contain a long half-life and highly resistant to biodegradation. These environmental pollutants accumulate over time in adipose tissues of living organisms and alter various insulin function-related genes. Childhood Metabolic Syndrome (MetS) consists of multiple cardiovascular risk factors, insulin function being one of them. Over the years, the incidence of the syndrome has increased dramatically. It is imperative to explore the role of persistent organic pollutants in the development of Childhood Metabolic Syndrome. Some epidemiological studies have reported an association between prenatal exposure to POPs and offspring MetS development throughout childhood. These findings have been replicated in animal studies in which these pollutants exercise negative health outcomes such as obesity and increased waist circumference. This review discusses the role of prenatal exposure to POPs among offspring who develop MetS in childhood, the latest research on the MetS concept, epidemiological and experimental findings on MetS, and the POPs modes of action. This literature review identified consistent research results on this topic. Even though the studies in this review had many strengths, one major weakness was the usage of different combinations of MetS criteria to measure the outcomes. These findings elucidate the urgent need to solidify the pediatric MetS definition. An accurate definition will permit scientists to measure the MetS as a health outcome properly and allow clinicians to diagnose pediatric MetS and provide individualized treatment appropriately.

Investigating the Potential Role of Persistent Organic Pollutants in Hawaiian Green Sea Turtle Fibropapillomatosis

2014 ◽  
Vol 48 (14) ◽  
pp. 7807-7816 ◽  
Author(s):  
Jennifer M. Keller ◽  
George H. Balazs ◽  
Frances Nilsen ◽  
Marc Rice ◽  
Thierry M. Work ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Potential Role ◽  
Sea Turtle ◽  
Green Sea Turtle

Sediment-water column exchange of persistent organic pollutants (PAHs and PCBs) and their transport vector in El Bey watershed, Tunisia

2018 ◽  
Vol 11 (17) ◽  
Author(s):  
Samia Khadhar ◽  
Dhouha Achour ◽  
Anis Chekirben ◽  
Rim Chawachi ◽  
Ammar Mlayah ◽  
...  
Keyword(s):  
Water Column ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants

Influence of organic carbon cycling on the fate of persistent organic pollutants in marine environments

2020 ◽  
Author(s):  
Anna Sobek ◽  
Inna Nybom ◽  
Hans Peter Arp ◽  
Naiara Berrojalbiz ◽  
Nathan Charlton ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Baltic Sea ◽  
Water Column ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Data Set ◽  
Preliminary Results ◽  
Relative Contribution ◽  
High Nutrient ◽  
Total Sediment

<p>Persistent organic pollutants (POPs) are ubiquitously present in the aquatic environment. They are hydrophobic substances that sorb to organic carbon (OC), and thus their environmental fate is closely linked to OC fluxes and pools. In this project, we test the hypothesis that future changes in the OC cycle can influence POP flux from air to sediment and reduce the POP sink in Baltic Sea sediments. The hypothesis relies on the assumption that the OC sorption capacity is affected by the relative contribution of terrestrial OC as well as the trophic status (oligotrophic versus eutrophic) of the area. Four different coastal sites were sampled, to capture different carbon regimes in terms of nutrient status and level of terrestrial OC influence. Concentrations of POPs were analysed along high-resolution sediment porewater- bottom water interface profiles, in total sediment, suspended matter collected in sediment traps and plankton, in the water column and in air. Stable carbon isotope signatures (δ<sup>13</sup>C) showed that the sites are different in terms of the influence of terrestrial organic matter, and the sites differ in nutrient conditions.</p><p>Preliminary results demonstrate that in general, sediments (three sites analysed) act as a source of PAHs to overlying water, whereas sediment and water more often are in equilibrium for PCBs, although there are variations for individual compounds. At the high nutrient-low terrestrial site, which was sampled at two different seasons, both air and water concentrations were higher for PAHs and PCBs in the autumn compared to the summer, indicating the importance of air as source of these contaminants to the water column. Accordingly, air seems an important source of PAHs to the water column in the low terrestrial-low nutrient site, as concentrations in the water column are increasing towards the water surface, whereas this was not observed for PCBs at the same site. Preliminary results from two contrasting sites in the Gulf of Finland, both with high nutrient levels but with different relative contribution of terrestrial OC, demonstrate higher total sediment concentrations of PAHs in the sediment with more marine OC, which was not observed as clearly for PCBs. Data from the water column indicate that marine OC is more efficient in sorbing POPs as air and water concentrations were similar at both sites, even though the OC vertical export at the high terrestrial site was more than double compared to the low terrestrial site. The full data set, will allow for further evaluation of hypotheses on the links between OC cycling and contaminant fate in the Baltic Sea.</p>

Molecular insights into the role of a distal F240A mutation that alters CYP1A1 activity towards persistent organic pollutants

2017 ◽  
Vol 1861 (11) ◽  
pp. 2852-2860 ◽  
Author(s):  
Veronika Navrátilová ◽  
Markéta Paloncýová ◽  
Karel Berka ◽  
Shintaro Mise ◽  
Yuki Haga ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants
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