Screening of native plant species from mining sites can lead to identify suitable plants for phytoremediation approaches. In this study, we assayed heavy metals tolerance and accumulation in native and dominant plants growing on abandoned Pb/Zn mining site in eastern Morocco. ... Cu, Ni, Sb, Pb, and Zn concentrations. …
With the objective of estimating the temporal variation and bioavailability of Cd, Cu, Pb and Zn in Coatzacoalcos estuary, the biota-sediment accumulation factors (BSAF) were calculated. For this purpose, surficial sediments and clams from 14 selected sites were collected during three climatic seaso …
The Zn–Pb–Ag skarns of Zacatepec are located in the eastern Sierra Madre del Sur, southern Mexico. They are hosted by the Cuicateco Terrane, a composite unit made up of deformed Jurassic and Cretaceous volcanic and sedimentary rocks deposited in an arc environment that also hosts several precious- and base-metal epithermal deposits and …
The results show that, in the sludge sample, the sum of the percentages of the reducible and oxidizable fractions for all metals except Cu was very high (65.4% for Cd, 85.7% for Pb, 78.7% for Zn), whereas the sum of the percentages of the oxidizable and residual fractions for Cu was very high (88.8%).
IX offers an effective method for the recovery of these metals from a leachate. This study presents the pH performance of six selected IX resins in extracting Cu 2+, Fe 2+, Pb 2+ and Zn 2+ from acetic, lactic and citric acid media simulated weak acid leachate. Acetic acid media displayed limited suppression of metal extraction, whilst lactic ...
Trace element concentrations in C. rastrospinosus in the northern Antarctic Peninsula were ordered from high to low as Zn > Cu > Cd > Pb in the intestine, Zn > Cu > Pb > Cd in the stomach, Zn > Cu > Cd > Pb in the liver, and Zn > Cu > Pb > Cd in muscle. Zn content was significantly higher in all tissues by at least one magnitude than other ...
Ion exchange removal of Cu(II), Fe(II), Pb(II) and Zn(II) from acid extracted sewage sludge – Resin screening in weak acid media April 2019 Water Research 158(48)
Sulfur and chlorine are the two most important ligands accounting for metal transport in the upper crust. In this study, four metal- and sulfur-saturated model fluids with varying salinities and redox states were simulated in the Fe-Cu-Pb-Zn-Au-S-C-H-O system, over a wide pressure-temperature (P-T) range (50–650 °C, 0.8–5.0 kbar), in order to …
MEXICO 21°06'57"N, 101°20'40"W 20°55'29"N, 101°08'47"W D.F. Fig. 1 Location map showing the mines in the Guanajuato district sampled for this study relative to the three main fault systems (La Luz, Veta Madre, and Sierra). Inset map, Location of Guanajuato in Mexico. D.F. Distrito Federal (Mexico City) Miner Deposita (2014 ...
Mineralization in the Zacatecas district is polymetallic (Ag, Zn, Pb, Cu, and Au) and occurs as skarn-type and epithermal veins formed in different metallogenetic stages.
The high-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico occur in thick carbonate-dominant Jurassic-Cretaceous basinal sedimentary sequences floored by Paleozoic or older crust. Altered and/or mineralized volcanic and intrusive rocks of Tertiary age are found in all but three of the districts; mineralization apparently ...
A disposable electrochemical sensor fabricated screen-printed carbon electrode co-modified with bismuth film and gold nanoparticles has been demonstrated …
A Cu-Pb-Zn (copper-lead-zinc) production line is utilized in mining operations to extract and process these valuable metals from ores. The extracted metals have numerous …
The Guanajuato epithermal district is one of the largest silver producers in Mexico. Mineralization occurs along three main vein systems trending dominantly northwest-southeast: the central Veta Madre, the La Luz system to the northwest, and the Sierra system to the east. Mineralization consists dominantly of silver sulfides and sulfosalts, …
The results demonstrate that the ore consists of 35 categories of minerals, assaying Cu 7.99%, Pb 9.39%, and Zn 1.96% in the forms of chalcopyrite, galena, and sphalerite, respectively, and silver assaying 157.9 g/t is closely associated with these sulfides; sulfides are present in amounts of 80.31% of the total, traditional gangues only …
The uptake and distribution of four heavy metals, including copper (Cu), cadmium (Cd), lead (Pb) and zinc (Zn), and those of total phosphorus (TP) in 30 plants in North China were investigated through pot trial experiments. Accumulation and distribution of heavy metals or TP were associated with plant species, tissues, metal elements and …
The second mineralization stage is partly superimposed on the first and consists of zoned east-west–trending Cu-Ag-(Au-Zn-Pb) enargite-pyrite veins hosted in the diatreme breccia in the western part of the deposit and well-zoned Zn-Pb-(Bi-Ag-Cu) carbonate-replacement orebodies; in both cases, sphalerite is Fe poor and the inner …
The impact of mining wastes on both the concentration and environmental mobility of Zn, Pb and Fe was studied in a shallow river. The studied tributary of the Taxco river is located south of the historical Ag, Zn, Cu and Pb mining area of Taxco, about 150 km south of México City. Methodology include …
Concentrations of Selected Trace Metals (Cu, Pb, Zn), Organochlorines (PCBs, HCB) and Total PAHs in Mangrove Oysters from the Pacific Coast of Mexico: An Overview December 2002 Marine Pollution ...
Good piezoelectric properties and low mechanical losses are prerequisites for the application of high-power devices. In this study, an appropriate amount of Mn ions was introduced into a piezoelectric 0.46Pb(Ni1/3Nb2/3)O 3-0.23Pb(In1/2Nb1/2)O 3-0.31PbTiO 3 ceramic to enhance its electromechanical properties. The results revealed that the …
Jinchanghe is a Zn-Pb-Fe-Cu skarn deposit in the northern Baoshan block, southwestern China. It is a typical distal skarn deposit with orebodies in the Cambrian Hetaoping Formation limestone and calcareous siltstone. The skarn minerals display a vertical zonation with garnet skarn in the lower part and pyroxene skarn in the upper …
The spatial distributions of Cr, Ni, Cu, Zn, As, Cd and Pb (potentially toxic elements, PTEs) in sediments and intrinsic influence factors from the Wuliangsuhai wetland of the Hetao Irrigation District, China were studied in this work. The results showed that excluding Zn, the total contents of other PTEs were higher than the background values, …
The metal types and concentrations contributed to the mineralogy of various calcium carbonates precipitated and differences in metal removal rates. Pb and Sr showed more than 99% removal efficiency, whereas Cu, Zn, and Cd showed a low removal efficiency of 30∼60% at a low concentration of 0.05 mM or less.
These metal resources include Pb, Zn, Cd and Cu. Pb–Zn mine is of dominating mines in Yunnan Province. The total reserves of Pb–Zn mines are 26.053 million tons in Yunnan Province (Bai et al., 1985). On the other hand, plant species was diverse in metal mining area, including tree, bush and herbaceous. Because of …
Cu-Zn brasses, like many industrial alloys, are based on solid solutions of a base metal, here the FCC Cu. In the equilibrium phase diagram 8, the Cu-Zn solid solution covers a wide composition ...
The paper shows aspects about the behavior of Cu-Zn-Pb alloys a subjected to the temperatures variation and corrosion resistance in saline medium (sea water). The …
Images illustrating the morphology of metal containing particles observed in Northern Mexico City. (A) Zn containing crystal attached to soot; (B) Needle-like particles containing Pb, Zn, and Cl; (C) Tetrahedral Zn …
The simultaneous electrochemical determination of Zn (II), Cd (II), Pb (II), and Cu (II) in the aqueous solution has been developed on the basis of the bismuth film …
The high-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico occur in thick carbonate-dominant Jurassic-Cretaceous basinal sedimentary sequences floored by Paleozoic or older crust. The districts lie within, or on the margins of, a major fold-thrust zone; structures parallel to the trends of this belt control mineralization ...
Consecuente con la mineralogía de los yacimientos explotados, los jales de Nacozari contienen concentraciones totales bajas de As (8.9 mg kg-1), Pb (< 20 mg kg-1) y Zn (91 mg kg-1) y ...