Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The delivery and accumulation of PCDD/Fs and dioxin-like PCBs (DL-PCBs) as recorded in sediments from the Lake Maggiore (LM) in Northern Italy and the influence of the atmosphere in contaminating this subalpine ecosystem were studied. PCDD/Fs (17 congeners) and DL-PCBs (12 congeners) concentrations, congener profiles and fluxes in air, bulk deposition, aquatic settling material and surface sediments are presented. Our strategy was to obtain surface sediment from areas near riverine inputs and in the depositional basins, settling material in sediment traps at one site and air, aerosol and bulk deposition profiles. PCDD/F concentrations in air of 25 WHO-TEQ fg m(-3) and DL-PCBs of 7 WHO-TEQ fg m(-3) were measured. Bulk atmospheric deposition yielded 140 and 28 WHO-TEQ pg m(-2) per week for dioxins/furans and DL-PCBs, respectively. Aquatic settling material exhibited concentrations of 11 WHO-TEQ pg g(-1) for PCDD/Fs and 2 WHO-TEQ pg g(-1) for DL-PCBs. Weekly settling material fluxes of 50 WHO-TEQ pg m(-2) and 10 WHO-TEQ pg m(-2) were obtained for PCDD/Fs and DL-PCBs, respectively. PCDD/Fs concentrations in surface sediments varied from 0.1 to 17 WHO-TEQ pg g(-1) whereas values ranged from 0.03 to 6 WHO-TEQ pg g(-1) for DL-PCBs. The concentrations obtained in the environmental compartments studied suggest a situation of low level contamination. PCDD/Fs and DL-PCBs congener profiles in atmospheric air, bulk deposition, aquatic settling matter and surface sediment point to an important if not dominant contribution from atmospheric deposition to Lake Maggiore, especially derived from wet deposition of aerosol-bound PCDD/Fs and DL-PCBs. Flux estimates support this hypothesis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2007.06.097 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Late Bronze Age foreign elite? Investigating mobility patterns at Seddin, Germany.
PLoS One
September 2025
Department of Research, Collections and Conservation, Environmental Archaeology and Materials Science, National Museum of Denmark, Kongens Lyngby, Denmark.
During the Late Bronze Age (ca. 11th-8th century BCE), far-reaching and extensive trade and exchange networks linked communities across Europe. The area around Seddin in north-western Brandenburg, Germany, has long been considered as at the core of one such networks.
View Article and Find Full Text PDFBuried interface anchored octahedra for efficient sky-blue perovskite light-emitting diodes.
Chem Commun (Camb)
September 2025
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China.
Challenges such as interfacial nonradiative recombination and halogen phase separation have impeded the progress of blue PeLEDs. Here, a triammonium citrate layer is buried beneath perovskite films, which reorganizes the phase distribution and inhibits interfacial nonradiative recombination by anchoring PbX octahedra. By settling these key issues, efficient stable sky-blue PeLEDs have been successfully developed.
View Article and Find Full Text PDFExogenous adenosine promotes barnacle (Amphibalanus amphitrite) cyprid settlement through molecular signaling and improved adhesive mechanics.
Commun Biol
August 2025
Shenzhen Key Laboratory of Smart Sensing and Intelligent Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, PR China.
Marine biofouling caused by barnacle gregarious settlement poses significant challenges to various industries and ecosystems, such as increased drag on ship hulls, elevated fuel consumption, and heightened maintenance costs. While natural chemical cues are instrumental in driving barnacle settlement, the underlying mechanisms remain incompletely understood. In this work, we investigated the effects of adenosine (Ado), a settlement pheromone of Amphibalanus amphitrite cyprids, on cyprid exploration behavior, nano-mechanical properties of footprints, and gene expression using atomic force microscopy (AFM) and omics analysis.
View Article and Find Full Text PDFDevelopment and Characterization of a Novel Erucyl Ultra-Long-Chain Gemini Surfactant.
Polymers (Basel)
August 2025
College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China.
To stimulate the progress of clean fracturing fluid systems, an innovative erucyl ultra-long-chain gemini surfactant (EUCGS) was devised and manufactured during the course of this study. The target product was successfully prepared via a two-step reaction involving erucyl primary amine, 3-bromopropionyl chloride, and 1,3-bis(dimethylamino)propanediol, with an overall yield of 78.6%.
View Article and Find Full Text PDFDigital Twin-Enabled Extrusion Control for High-Fidelity Printing of Polymers.
Polymers (Basel)
August 2025
Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Direct ink writing (DIW) has emerged as a powerful technique for functional-structure fabrication. However, its application to materials with heterogeneous or time-dependent rheology remains limited. This study introduces dual-mode electropneumatic extrusion, supported by a real-time digital twin.
View Article and Find Full Text PDF