Sediment pollution is a major issue in coastal areas, potentially endangering human health and the marine environments. We investigated the short-term sublethal effects of sediments contaminated with polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) on the sea urchin for two months. Spiking occurred at concentrations below threshold limit values permitted by the law (TLVPAHs = 900 µg/L, TLVPCBs = 8 µg/L, Legislative Italian Decree 173/2016). A multi-endpoint approach was adopted, considering both adults (mortality, bioaccumulation and gonadal index) and embryos (embryotoxicity, genotoxicity and de novo transcriptome assembly). The slight concentrations of PAHs and PCBs added to the mesocosms were observed to readily compartmentalize in adults, resulting below the detection limits just one week after their addition. Reconstructed sediment and seawater, as negative controls, did not affect sea urchins. PAH- and PCB-spiked mesocosms were observed to impair at various endpoints, including bioaccumulation and embryo development (mainly PAHs) and genotoxicity (PAHs and PCBs). In particular, genotoxicity tests revealed that PAHs and PCBs affected the development of embryos deriving from exposed adults. Negative effects were also detected by generating a de novo transcriptome assembly and its annotation, as well as by real-time qPCR performed to identify genes differentially expressed in adults exposed to the two contaminants. The effects on sea urchins (both adults and embryos) at background concentrations of PAHs and PCBs below TLV suggest a need for further investigations on the impact of slight concentrations of such contaminants on marine biota.
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http://dx.doi.org/10.3390/ijms22136674 | DOI Listing |
Sci Total Environ
December 2024
Institute of Chemistry and Processes for Energy, Environment and Health ICPEES UMR 7515, University of Strasbourg, F-67087 Strasbourg Cedex 3, Strasbourg, France. Electronic address:
Caltech Active Strand Cloudwater collectors are used to collect valley fog samples from Mount and North-Lebanon during 2021 for the speciation of organic matter for the first time ever. Numerous compounds including pesticides, phenols, acids, and persistent organic pollutants such as polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and polycyclic aromatic hydrocarbons (PAHs) have been identified in fogwater samples. They are extracted using the liquid-liquid extraction performed on the XTR chromabond columns.
View Article and Find Full Text PDFChemosphere
December 2024
Department of Environmental Science, Kangwon National University, Chuncheon, 24341, Republic of Korea. Electronic address:
Companion dogs are exposed to various chemicals. However, our understanding of the sources and pathways of chemical exposure in pets remains limited. In this study, we collected urine samples from 47 dogs and corresponding samples of the food they consumed to analyze the concentrations and dietary exposure to organophosphate flame retardants (OPFRs) and their metabolites (mOPFRs).
View Article and Find Full Text PDFAdv Nutr
December 2024
Texas A&M Agriculture, Food and Nutrition Evidence Center, Fort Worth, Texas, United States; Department of Nutrition, Texas A&M University, College Station, Texas, United States.
Background: Determining dietary recommendations for seafood consumed during pregnancy, lactation, and childhood requires consideration of the known nutritional benefits and potential harm due to toxicant exposure as they relate to child outcomes.
Objectives: To describe the scope of the evidence associated with seafood-related toxicant exposure and child outcomes and to identify toxicant-outcome pairs that may have sufficient evidence to conduct a systematic review.
Methods: We included studies examining seafood toxicant exposure during pregnancy, lactation, and childhood, and child outcomes.
J Environ Manage
December 2024
University Canada West, 1461, Granville St., Vancouver, BC, V6Z 0E5, Canada.
The hydrophobic, hard-to-naturally-decompose compounds, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and pesticides, are categorized as persistent organic pollutants (POPs). POPs are toxic/hazardous and present serious risks to human health. Electrokinetic (EK) remediation is highly flexible and cost-effective, suitable for both in-situ and ex-situ applications.
View Article and Find Full Text PDFAnal Chim Acta
January 2025
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemsistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, PR China.
Fast and accurate determination of persistent organic pollutants (POPs) plays a crucial role in addressing concerns related to public security and environmental safety. Herein, a unique thin film based solid phase microextraction (denoted as TF-SPME) method was reported and used for on-site analysis of POPs via loading the TFs into a homemade sampling device and equipped on a drone, which can load up to 6 pieces of TFs at the same time. The parallel 6 pieces of TFs offered significant advantages in terms of efficiency, accuracy, cost-effectiveness and comparability of sampling.
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