Environmental Geochemistry of Abandoned Flotation Tailing Reservior from the Tonglvshan Fe-Cu Sulfide Mine in Daye, Central China

Abstract

This study investigated metals of tailings from Tonglvshan mine in Daye and assessed the effect of metal contamination in water and sediment near the tailing reservoir. The concentration of copper, lead, zinc, cadmium, chromium and nickel was measured in deposit samples taken from a profile in an abandoned flotation tailing reservoir, as well as in water and sediment samples near the reservoir. The results of this study indicate that copper concentration ranges from 780 to 4390 mg/kg, 2-10 times higher than the limit values in soil, while the contents of other metals are below the limit values. Metal levels in water and sediments are high and varied widely in different sampling sites. The mean concentrations of copper, lead, zinc, cadmium, chromium and nickel in waters are 27.76, 2.28, 8.20, 0.12, 5.30 and 3.04 mg/L, while those in sediments are 557.65, 96.95, 285.20, 0.92, 94.30 and 4.75 mg/kg, respectively. All of the results indicate that the environment near the tailing reservoir is polluted to some extent by some kinds of metals, especially by copper, lead, zinc and cadmium, which may be caused not only by some discharge sources of metals, but also by life garbage and sewage.

Arsenic Biotransformation in Solid Waste Residue: Comparison of Contributions from Bacteria with Arsenate and Iron Reducing Pathways

“…This HDS process requires increasing the pH with hydrated lime and subsequently adding iron salts to form precipitates with As. The precipitate residue generally contains high contents of Cu, Pb, Zn, Ca, Cd, Fe, and As. , To determine the metal content in the solid waste, triplicate samples were freeze-dried and were digested with a microwave digestion system (MARS, CEM Corporation, U.S.) …”

“…The precipitate residue generally contains high contents of Cu, Pb, Zn, Ca, Cd, Fe, and As. 17,18 To determine the metal content in the solid waste, triplicate samples were freeze-dried and were digested with a microwave digestion system (MARS, CEM Corporation, U.S.). 19 Three bacteria strains from different genera, Pantoea sp.…”

Trace metal pollution and potential health risk assessment: a case study of Daye Lake over the past ten years (2000-2009)

“…The change patterns in the three parts of Daye Lake were similar (Figure 4) Most of the trace metal in Daye Lake was from mining waste water (Guo et al, 2011). By 2002, 72% of the mine resources were already exploited.…”

Source-based health risk assessment of heavy metal contamination in Soil: A case study from a polymetallic mining region in Southeastern Hubei, Central China

“…Extensive mining operations over the years have revealed that Cd, Cr, Pb, and As pose health risks to humans, with soil ingestion representing a signi cant pathway of exposure (Guo et al, 2017;Yin et al, 2012). Previous studies suggested that these HMs originate not only from natural sources but also from mining activities, tra c emissions, and agricultural practices (Guo et al, 2011;Xiao et al, 2017). However, although prior research has con rmed HM contamination in local soils due to mining and metallurgy activities, few studies have attempted to delineate the contribution of these sources to potential health risks.…”