[PDF] Top 20 Mercury cycling between the water column and surface sediments in a contaminated area

... treated in a nitrogen-filled glove bag to prevent oxidation reactions. The pore water samples were extracted from sediments by centrifugation at 6000 rpm for 20 min ...of the ... See full document

... concentrations in sediments were highly variable ranging from ...1). The magnitude of PCBs contamination was about one order of magnitude lower than the 1994 Record of Decision cleanup ... See full document

... pollutant in a few confined bodies of the coastal zone (Cossa and Martin, 1991; Kudo and Miyhara, 1992; Mason et ...toxicity the un- derstanding of the biogeochemical dynamics ... See full document

... collected in April (phytoplankton bloom), June (shortly after mass sedimentation of the spring bloom) and September (high mineralization rate; ...sampling and ethics requirements were needed ... See full document

... as the sampling stations. Considering that the contaminated area is located on a declivity in the direction of the Rico stream, Brazilian authorities interdicted it ... See full document

... oxidized and reduced sediments can accumulate Hg, but any shifts in redox conditions in bottom water and upper sediment layer lead to the release of Hg species into ... See full document

... (Roden and Edmonds, 1997) and by dissolving Fe minerals containing PO 3− 4 (Gachter and Muller, ...spite the complex interactions among the Fe, S and P pools, PO 3− 4 release to ... See full document

... performed in Ria de Aveiro is also ...to mercury pollution due to the discharge of an effluent rich in this metal from a chlor-alkaly plant located ...Nevertheless, in the last ... See full document

... GEOCHEMISTRY AND INDEX OF GEOACCUMULATION OF MERCURY IN SURFACE SEDIMENTS FROM SANTOS- CUBATÃO ESTUARY, STATE OF SÃO PAULO, ...BRAZIL. The concentrations of mercury ... See full document

... wildlife and humans. High levels of Hg, in particular methylmercury (MeHg), were detected in surface sediments of Tagus ...neurotoxic and its concentration in aquatic ... See full document

... C in Tucuruí could be an effect of the non-deforestation before filling ...up. In the water column, the highest values of dissolved organic matter concentrate at the ... See full document

... Recently, in Thau Lagoon (France), Muresan et ...(0.02–0.80%) in the solid phase of sediments, and the amorphous oxyhydroxides played a major role in controlling total ... See full document

... prevalent in water and sediment samples (64%, and 48%, respectively) than other enteric viruses detected by qPCR in different aquatic matrices (water and ...HAdV in ... See full document

... to the Hepeviridae family, resistant to environmental conditions, and transmitted by the consumption of contaminated ...sporadic and epidemic outbreaks, leading to thousands of ... See full document

... by the flood pulse. The lakes in the Madeira river basin are subject to the deposition of suspended materials rich in adsorbed Hg due to a phenomenon known as “repiquete” – ... See full document

... consists in the fact that the frequency of extreme meteorological events, such as torrential rainfall, has grown significantly much, causing violent and rapid ...efficiently in order to ... See full document

... h) and low-cost extraction procedure, it is possible to identify the samples that show higher levels of potential mobile metals in sediments, derived from anthropogenic ...only the ... See full document

... 166), the species number for the oligotrophic condition was markedly higher in the subfossil assemblages, where this phase was uniquely represented in Guarapiranga ...decline in ... See full document

... All the activities and development processes existing on the territory of the municipality of Subotica result in certain effects on the ...on the analysis of the ... See full document

... [r] ... See full document