Determination of Fe, Ni, Cu, Zn, Cd and Pb in seawater by …
A small volume (10 mL) of seawater sample was mixed with a multi-element isotope spike and subjected to seaFAST procedures. The preconcentrate solution was then analyzed using the optimized collision/reaction cell mode of ICP-MS, with NH3 gas for Fe and Cd with a flow rate of 0.22 mL/min and He for Ni, Cu, Zn and Pb with a flow rate of …
Distribution and stoichiometry of Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, …
The averages are 2.8 for Mn, 1.2 for Fe, 1.4 for Co, 14 for Ni, 138 for Cu, 106 for Zn, 581 for Cd, and 155 for Pb. They suggested that Cu, Zn, Cd, and Pb are primarily of anthropogenic origin. EF(dPb) in the ECS is of the same order of magnitude as the EF(Pb) in the ECS atmospheric aerosol. These results suggest that dPb is derived from ...
High intensity magnetic separation for the clean-up of a site …
This waste is a source of potentially toxic trace elements (Pb, As, Cd, Zn, Cu, Mn) that can be released into soils, the atmosphere, surface waters and groundwater [1], [2]. ... The rare earth magnetic separator used was the high force magnetic separator Model No. L/p 10:30 of International Process Systems Inc. ...
Determination of Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb in seawater …
Here we present a new method for the simultaneous determination of Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb, in seawater samples. This novel method, combining isotope …
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Paleomagnetism of the Cu–Zn–Pb-bearing Kupferschiefer
Syngenetic, diagenetic and epigenetic models have been proposed for the Cu–Zn–Pb Kupferschiefer mineralization at Sangerhausen, Germany. Paleomagnetic …
The distribution and partitioning of trace metals (Pb, Cd, Cu, and Zn
The concentrations of Cu, Zn, Pb, Cd, and As varied quite differently in the water, suspended particulate matter (SPM), and sediment along the middle reach of the Beijiang River in southern China. The total concentrations of trace metals and As in the water column were significantly affected by the concentration of SPM, while the metals …
Diagenetic History and Timing of Cu and Zn-Pb Sulfide
The Southern Permian basin in central Europe contains a number of important high-grade sediment-hosted Cu deposits. Laterally extensive stratabound Cu and Zn-Pb sulfide mineralized rocks are located at a major stratigraphic redox boundary, where coarse-grained continental sandstones of the uppermost Rotliegend Group are overlain by …
Determination of Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb in seawater …
A novel method, combining isotope dilution with standard additions, was developed for the analysis of eight elements (Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb) in seawater.The method requires just 12 mL of sample and employs an off-line pre-concentration step using the commercially available chelating resin Toyopearl AF …
Determination of Mn, Fe, Ni, Cu, Zn, Cd and Pb in seawater using
Here a multi-element method is presented which combines the commercially-available seaFAST preconcentration system with ICP-MS/MS for the analysis of Mn, Fe, Ni, Cu, Zn, Cd and Pb in seawater. Samples (20 mL or 40 mL) are loaded on to a chelation resin column and trace metals eluted into 2.5 mL of 1.6 N HNO 3. Analysis of the eluate was …
(PDF) Paleomagnetism of the Cu-Zn-Pb-bearing
PDF | Syngenetic, diagenetic and epigenetic models have been proposed for the Cu–Zn–Pb Kupferschiefer mineralization at Sangerhausen, Germany.... | Find, read …
Determination of Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb in seawater …
A novel method, combining isotope dilution with standard additions, was developed for the analysis of eight elements (Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb) in seawater. The method requires just 12 mL of sample and employs an off-line pre-concentration step using the commercially available chelating res …
Cu and Cu-Based Nanoparticles: Synthesis and Applications in …
The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the field of catalysis. The possible modification of the chemical and physical properties of these nanoparticles using different synthetic …
Concentrations and chemical fractions of Cu, Zn, Cd, and Pb at …
Metal pollution in urban soils due to smelting and electroplating has become a severe problem in China. In this study, the concentration, chemical fraction, and leaching behavior of typical metals (Cu, Zn, Cd, and Pb) in soil samples from ten metallurgical sites were studied. The results show that some of the soils were polluted with Cu and most …
Understanding the Cu-Zn brass alloys using a short-range-order …
The chemical composition within the 2 nd-neighbor local zone is then Zn + Cu 9.4 Zn 2.6 + Cu 3.5 Zn 2.5 = Cu 12.9 Zn 6.1, or Cu 67.9 Zn 32.1 in at.%, which is close to that of the alloy, Cu 68.9 ...
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Behavior of critical metals in metamorphosed Pb-Zn ore deposits
However, too few chemical analyses of rare metals have been performed in these deposits. As an example, Fig. 12 reports a compilation of Ge and Cu contents in sphalerite analyzed in Pb-Zn(-Cu) deposits worldwide. These deposits are mostly related to low-temperature hydrothermal fluids (~ 100–250 °C) with no- or only low-grade deformation.
Comparison of microscopic adsorption characteristics of Zn(II), Pb…
Stock solutions of Zn(II), Pb(II), and Cu(II) were prepared by dissolving Zn(NO 3) 2, Pb(NO 3) 2, and Cu(NO 3) 2, respectively, into deionized water and diluting to 1000 mg/L. The adsorption ...
Green synthesis of bimetallic ZnO–CuO nanoparticles and their
The presence of Zn, Cu, and O with weight percentages of 59.3, 19.4, and 21.3, respectively, confirmed the high amount of ZnO NPs compared to CuO (Fig. 2c). Figure 2 SEM images ( a, b ) and EDX ...
Flowsheet development for selective Cu-Pb-Zn recovery at Rosh …
This would enable the Pb circuit to produce a grade of 65% Pb at 81% recovery, and the Zn circuit, a grade of 57% Zn at 97% recovery. Mineralogical analysis of the final Pb and Zn products confirmed the need for the re-grinds. For the high-Cu ore, the challenge was to produce three distinct Cu, Pb, and Zn concentrates.
Modulating Zn deposition via ceramic-cellulose separator with
The preparation process of ZC separator is displayed in Fig. 1 a and the details are illustrated in Supporting Information (SI). The ZC separator is synthesized via a facile and cost‐effective solution casting method, briefly, the ZrO 2 (50 nm) particles and polymethyl cellulose dispersion (solid content ~2%) are mixing in deionized water, the …
Understanding the Cu-Zn brass alloys using a short-range-order …
Two types of formulas are pointed out, [Zn-Cu 12 ]Zn 1~6 and [Zn-Cu 12 ] (Zn,Cu) 6, which explain the α-brasses listed in the American Society for Testing and …
A novel process for Fe recovery and Zn, Pb removal from a low …
Comprehensive utilization of pyrite cinders is increasingly important because of their huge annual outputs and potential valuable metals recovery to cope with the gradual depletion of high-grade mineral resources. In this work, a new process, i.e., a high-temperature chlorination–magnetizing roasting–magnetic separation process, was …
Determination of Fe, Ni, Cu, Zn, Cd and Pb in seawater by
2019a). Pb can act as a tracer to reveal anthropogenic footprints in the ocean (Jiang et al., 2018). Concentrations of trace metals in the ocean are determined by their sources and sinks and the in-ternal cyclings. For example, Fe, Zn, Ni, Cu, Cd and Pb in the Northwest Pacific ranged of 0.09−1.00 nmol/L, 0.1−10.0 nmol/L,
First report on the burden and distribution of Cu, Zn, Pb, and Cd …
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 ...
Preparation of High-Purity Tin by Zone Melting
Abstract High-purity tin is widely used in advanced technologies such as aerospace, electronic information, and nuclear industry. It has become a key material supporting the development of human science and technology innovation. However, there are few studies on the preparation methods of high purity tin. A novel technique was …
Geochemistry of magnetite from porphyry Cu and skarn deposits …
A combination of petrographic observations, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and statistical data exploration was used in this study to determine compositional variations in hydrothermal and igneous magnetite from five porphyry Cu–Mo and skarn deposits in the southwestern United States, and …
Determination of Trace Metal (Mn, Fe, Ni, Cu, Zn, Co, Cd and Pb
The quantification of dissolved metals in seawater requires pre-treatment before the measurement can be done, posing a risk of contamination, and requiring a time-consuming procedure. Despite the development of automated preconcentration units and sophisticated instruments, the entire process often introduces inaccuracies in …
Structure and properties of Sn-Cu lead-free solders in electronics
The formation of Cu 5 Zn 8 particles caused by Zn addition trapped in the Cu 6 Sn 5 grain boundary and played a dispersion-strengthening role [Citation 46]. The author held that the addition of Zn should not be excessive. From the microstructure of Sn-0.7Cu-1.0Zn, the size of Cu 5 Zn 8 particles began to show coarsening.
Superconducting High-Gradient Magnetic Separation
Minerals 2022, 12, 1191 3 of 12 were obtained by chemical multi-element analysis. The recoveries are calculated based on elemental balances as follows:"= b.g a …