Mercury contents in the vertical profiles through alluvial sediments as

Metal containing particles can be transported over large distances by water, as is in the case of Idrija area, where effects of mining are recorded in the marine sediments as far as 500 km away ...

Copper Reserves in Poland

The most common copper sulfides are as follows: chalcocite, bornite, chalcopyrite and covellite. The most significant copper deposit type in Poland is sediment-hosted stratabound copper deposits and holds the majority of Poland's copper reserves. Of particular importance is the Kupferschiefer deposit-- The Kupferschiefer metallogenic …

Does sand mining affect the remobilization of copper and …

It is generally accepted that the sand mining industry causes severe destruction in river basin environments. In this study, six sediment cores were collected, and sequential extraction was applied in conjunction with the diffusive gradients in the thin films (DGT) technique to explore the effect of sand mining on the remobilization of Cu …

Microbial communities are sensitive indicators for freshwater sediment

Copper was below detection limits in all water samples (Table 1).With the exception of the ponds spiked with a nominal 32 mg Cu kg −1 (40%), the measured values of copper in sediment were within 10% of the nominal copper concentrations (Table 1).Henceforth, we will refer to copper treatments by their average measured …

Geochemical cycling and speciation of copper in waters and sediments …

Average (n=2) particulate copper profiles in benthic sediment core samples. Table 3. Results of analyses conducted on selected sediment core sections ... These sites demonstrate the change in sediment characteristics brought about by the mining activities and site 6 may be close to the southern-most extent to which particulate matter from the ...

Does sand mining affect the remobilization of copper and …

It is generally accepted that the sand mining industry causes severe destruction in river basin environments. In this study, six sediment cores were collected, and sequential extraction was applied in conjunction with the diffusive gradients in the thin films (DGT) technique to explore the effect of sand mining on the remobilization of Cu and Zn in the …

Mining-related contamination of surface water and sediments …

This study investigated binding forms of cobalt (Co), copper (Cu), and lead (Pb) in 28 sediment samples from inlet to outlet of three Zambian wetlands receiving mining effluents.

Guidelines for copper in sediments with varying properties

Copper. Sediment. Invertebrates. Organic carbon. Particle size. 1. Introduction. Sediment quality guidelines (SQGs) are a fundamental component of all …

Ancient mining pollution in early to middle Holocene lake sediments …

Determining the timing and transport mechanisms (i.e. fluvial and/or atmospheric) of pollution associated with ancient copper mining on Isle Royale in Lake Superior (United States) is important for understanding the current and future trajectory of ecosystems affected by human activity. This study reports metal concentrations in …

Copper-ore mining in Sweden since the pre-Roman Iron Age: lake-sediment

The largest mining area in Garpenberg is Odalfältet, which includes the historic Garpenberg copper mine that adjoins our study lake Gruvsjön ('Mine lake') on its NW corner. For this study we collected a 458-cm sediment profile from the deep basin of Gruvsjön (Fig. 1), and performed both geochemical and pollen analyses.This multiproxy …

Does sand mining affect the remobilization of copper and …

At the four stations with sand mining disturbance, about 5–10 folds of DGT-labile Pb and Cd were released in deep sediments (−9 to −12 cm), and Pb and Cd exhibited a transport trend from the ...

Nearshore versus offshore copper loading in Lake Superior sediments …

A thorough understanding of the fate and transport of metals in Lake Superior is necessary in order to predict the ability of Lake Superior to recover from anthropogenic perturbations (copper mining). Sediment cores were collected from nearshore and offshore sites in Lake Superior and used to evaluate spatial and temporal variations in …

Understanding of Chemical Speciation of Lead, Zinc and Copper …

Understanding of Chemical Speciation of Lead, Zinc and Copper in Vertical Profile of the Sediments of the Brahmaputra River, Assam, India

Anthropogenic Copper Inventories and Mercury Profiles …

Anthropogenic copper inventories were calculated by determining the excess copper inven- tory above background over the length of the core: Copper and Mercury Profiles in Lake Superior Sediments 667 C a = ∑ i (C t – C b )M i (1) where C a = anthropogenic copper (µg/cm 2 ) summed over depth (i, in cm), C t = total copper …

Assessment of undiscovered copper resources of the world, …

The U.S. Geological Survey completed the first-ever global assessment of undiscovered copper resources for the two most significant sources of global copper …

Sulfate reduction, molecular diversity, and copper …

Sulfate-reducing bacterial communities from coastal sediments with a long-term exposure to copper (Cu)-mining residues were studied in lactate enrichments. The toxicity of excess copper may affect sulfate-reducing bacterial communities. Sulfate reduction was monitored by sulfate and organic acid measurements.

Leachability characteristic of heavy metals and

Request PDF | Leachability characteristic of heavy metals and associated health risk study in typical copper mining-impacted sediments | A total of 100 samples were collected from the sediments of ...

Distribution and Transport of Residual Lead and Copper …

J Soil Sediment. 14: 928â€"935. Kovacs E, Dubbin W E, Tama´s J. 2006. Influence of hydrolo- gy on heavy metal speciation and mobility in a Pb-Zn mine tailing. Environ Pollut. 141: 310â€"320. Koz B, Cevik U, Akbulut S. 2012. Heavy metal analysis around Murgul (Artvin) copper mining area of Turkey using moss and soil.

Copper smelting and sediment pollution in Bronze Age …

In turn, this situation led to a sharp increase in the mining of copper raw materials (Yi, 2011), which possibly exploited ore deposits near the Tongling-Nanling, Zhongtiao and Tonglu mountains (Cui, 2008, Li, 1993). Sediment pollution from both mining and smelting activities may have occurred in central China around 3600 years ago.

Mercury contents in the vertical profiles through alluvial sediments as

Research highlights Hg contamination of alluvial sediment because of mining tradition in Idrija. High rate of contamination, up to 2000 mg/kg, enrichment factors up to 15,000. Floodplain most contaminated geomorphological unit. Exponential decrease of contamination in relation to the distance from the source. Geochemical background …

Early Diagenesis of Sediment from Kelly Lake, Sudbury, …

by Sewage Effluent and High Levels of Copper and Nickel from Mining and Smelting ... sediment profiles: one is at 35 cm, the other is at approximately 13 cm. sediment. () A

Hydrology | Free Full-Text | Iron and Manganese Oxidation …

The mobility of a metal in mining-impacted sediments is determined by the environmental conditions that influence the metal's oxidation state and bonding environment. Coeur d'Alene Lake, USA, has been impacted by legacy mining practices that allowed the hydrologic transport of mining waste to the lakebed, resulting in substantial …

Copper profiles in the sediments of a mining-impacted lake

Physical sediment properties and copper concentrations indicate the shoreline tailings piles are probably not a significant source of copper to the post …

Sources and chronology of fifteen elements in the sediments …

Sources and chronologies of metal contamination were studied in sediment cores of three lakes of the Rouyn-Noranda mining area (Québec, Canada) affected by atmospheric deposition of anthropogenic contaminants. One of the three lakes also received acid mine drainage. The sediments were dated using 210Pb and 137Cs and …

Copper mining on Isle Royale 6500–5400 years ago …

At McCargoe Cove, concentrations of lead, copper, and potassium increase in the sediments after ad 1860 and between 6500 and 5400 years before ad 1950 (yr BP). Metal pollution increases at McCargoe Cove exceed natural (or background) levels and coincide with radiocarbon dates associated with copper artifacts and existing lead …

Ancient mining pollution in early to middle Holocene lake …

Determining the timing and transport mechanisms (i.e. fluvial and/or atmospheric) of pollution associated with ancient copper mining on Isle Royale in Lake …

A global rise in alluvial mining increases sediment load in …

In 30 countries in which mining affects large (>50 m wide) rivers, 23 ± 19% of large river length is altered by mining-derived sediment, a globe-spanning effect representing 35,000 river ...

Copper Profiles in the Sediments of a Mining-Impacted Lake

PDF | PurposeThe sediments of Torch Lake, located in Houghton County, MI, USA, have been impacted by copper mining activity. Remediation of the site has... | …

Abundance and diversity of copper resistance genes cusA …

Between 1938 and 1975, the Chanaral coastline received approximately 150 million tons of raw Cu mining flotation tailings from the mining activities of the copper mine El Salvador.In 1976, the tailing discharge point was moved 10 km north of Chanaral Bay to Caleta Palito, releasing more than 130 million tons of waste up to 1989.Two 25 cm-long …

Leachability characteristic of heavy metals and associated

A total of 100 samples were collected from the sediments of a typical copper mining area, south China. Leaching concentrations of selected heavy metals (Ni, Cd, Cu, Pb, Zn, Ba, As, and Hg) were measured to evaluate their distribution patterns and associated health risk. Leaching concentrations of Cu …