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Samples were analysed for Pb, Cd, As, Ni, Zn, Mn, Fe, and Cu. Calibration standards were analysed and cross-checked by combinations of 'in-house' solutions …
This paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived washing agents (SS_WAs) (dissolved organic matter, DOM; soluble humic-like substances, HLS; soluble humic substances, SHS) and Na 2 EDTA (as a standard benchmark) in column experiments. …
DOI: 10.1016/J.ENVPOL.2006.08.005 Corpus ID: 45520245; Role of microbial inoculation and chitosan in phytoextraction of Cu, Zn, Pb and Cd by Elsholtzia splendens--a field case.
Sphalerite and pyrrhotite grains from the Luotuoshan Zn-Cu-W deposit and quartz from the Lengshuibeigou Pb-Zn-Ag deposit display Rb-Sr isochron ages of 139.6 ± 2.3 Ma and 40 Ar/ 39 Ar plateau age of 137.9 ± 0.4 Ma, respectively (Wang et al., 2013, Xing et al., 2016). Were these distal mineralizations genetically related to the …
The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, …
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 …
pH 10.5-12 is where Fe is least hydrophobic while Zn (and Cu/Pb) is most hydrophobic. Great pH to Recover Zn. By modifying Flotation pH to create kinetic/speed …
A waste rock dump and a tailings dump are present in the northern area, whereas seepages from the adit and goaf are present in the southern area (Fig. 1).Contaminants in the seepages include Al, As, Cd, Cu, Fe, Mn, Pb, and Zn [10], which contaminate the creek in the mine area.Although passive treatment facilities …
For Zn, Cu, Pb and Cd, with the increase of incubation time and NIC dosage, the residual part (B4) increased steadily, the unstable part (B1) almost disappeared, showing that stability of Zn, Cu, Pb and Cd was well enhanced. Among them, the morphology of Zn and Pb was relatively stable, which might be due to the residual state …
In this work, a new process, i.e., a high-temperature chlorination–magnetizing roasting–magnetic separation process, was proposed for recovering Fe and removing …
فیدر ارتعاشی یا لرزشی یا ویبره ای (Vibrating feeder)، دستگاهی است که به عنوان خوراک دهنده معمولا در خطوط اولیه خردایش سنگ ها قرار گرفته و با حرکات ویبره ای، مواد را به سمت دستگاه خوراک گیرنده هدایت می ...
This study aimed to evaluate soil physicochemical characteristics (pH, electrical conductivity, organic matter, total N, and extractable P and K), and potentially toxic elements (As, Cu, Pb, and Zn), in non-active mines located in the Portuguese sector of the Iberian Pyrite Belt (IPB). A total of 70 sampling sites were surveyed at Aljustrel and …
Syngenetic, diagenetic and epigenetic models have been proposed for the Cu–Zn–Pb Kupferschiefer mineralization at Sangerhausen, Germany. Paleomagnetic …
1. Introduction. Globally, epithermal deposits host significant amounts of Cu, Pb, and Zn as well as other economically important elements such as In and Te (Hedenquist et al., 2000; Sillitoe and Hedenquist, 2003).These metals commonly occur in sulfides, mainly as chalcopyrite (CuFeS 2), galena (PbS), and sphalerite (ZnS); …
Figure 10C shows that the amounts of Ag, Au, and As increase toward the mineralized bodies. The contents of Zn, Pb, Cu, Ag, and Au are greater in the lithologies with higher CaO + MgO and lower Na2O + K2O values, but these parameters vary independently of the total contents of C, CaO + MgO, and Na2O + K2O, which indicate that the ...
Mean of δ 65 Cu AE647, δ 66 Zn IRMM3702, and 206 Pb/ 207 Pb values of non-exhaust emission sources in this study ranged from -0.49‰ to +0.19‰, -0.24‰ to +0.16‰, and 1.1535 to 1.4471, respectively. Non-exhaust emission sources could be discriminated by plotting the concentration and isotopic composition of Cu.
The pollution status of ten potentially toxic elements (PTEs), isotopic compositions (Cu, Zn, Pb), and the potential ecological risk posed by them were investigated in the PM10 fraction of road dust in Busan Metropolitan city, South Korea. Enrichment factors revealed extremely to strongly polluted levels of Sb, Cd, Zn, Pb, and …
The Mount Isa Cu-Pb-Zn deposit is hosted in the ca. 1650 Ma Urquhart Shale of the Mount Isa Group (Fig. 1).The Urquhart Shale is composed of highly interlayered fine-grained carbonaceous and dolomitic sediments, pyritic shales and various tuffaceous beds (Neudert and Russell, 1981).Sedimentological and microfossil data suggest the Urquhart …
Nanoparticles offer the potential to improve environmental treatment technologies due to their unique properties. Adsorption of metal ions (Pb(II), Cd(II), Cu(II), Zn(II)) to nanohematite was examined as a function of sorbent concentration, pH, temperature, and exhaustion. Adsorption experiments were conducted with 0.05, 0.1, …
The isotopic composition correlations for Cu (p < 0.01, r = −0.48), Zn (p < 0.01, r = −0.71) and Pb (p < 0.01, −0.78) concentrations were all negative and the δ 65 Cu, δ 66 Zn and 206 Pb/ 207 Pb became lighter as the concentration increased (Fig. 3 and Table 4). The sampling site close to the terrestrial regions had higher metal ...
The Laochang Ag-Pb-Zn-Cu deposit, located in the southern margin of the Sanjiang Tethys Metallogenic Belt (STMB), is the typical Ag-Pb-Zn-Cu deposit in this region. Its orebodies are hosted in the Carboniferous Yiliu Formation volcanic-sedimentary cycle and occur as stratiform, stratoid and lenticular. Whether or not the stratabound ore belong to the …
فیدر لرزشی. این دستگاه جهت انجام عملیات تغذیه مواد خطوط به صورت سیستماتیک طراحی شده و دارای قابلیت تنظیم دریچه خروجی برای کنترل ابعاد محصول نهایی می باشد که در انواع و تناژ مختلف در خطوط ...
The text then ponders on Caledonian massive sulfide deposits in Scandinavia, Precambrian, strata-bound, massive Cu-Zn-Pb sulfide ores of North America, and geology of the Zambian Copperbelt. Concerns cover types of orebodies, structures of the Zambian Copperbelt, geology of representative deposits, general geological features, and ...
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 …
This paper discusses new structural, kinematic and geochronological data from polymetallic (Pb-Zn-Cu-Ag ± Au) vein-type deposits hosted in the metamorphic basement of the southern Sierras de Córdoba.A Carboniferous age was established for the hydrothermal event between ∼329 and 315 Ma (Late Mississippian-Early …
The results also show that Cu, Zn, Cd and Pb can be removed from the fly ash with high efficiency using hydrochloric acid leaching, which is beneficial since these metals are potentially toxic. The nitric acid systems shows less efficient leaching of Cu and Zn as well as poor leaching efficiency of Pb; only 9% could be removed at pH 2.
فیدر (Feeder) در معادن به دستگاهی گفته می شود که به عنوان خوراک دهنده عمل کرده و مواد معدنی را برای ورود به سایر دستگاه ها از جمله سنگ شکن آماده و به سمت آن ها هدایت می کند. فیدر دستگاهی ضروری در ...
(Cu, Zn, Pb) input into Punat Bay N. Mikulic Æ V. Orescanin Æ T. Legovic Æ R. Zugaj Abstract The fate of heavy metals (Cu, Pb, Zn) from their sources to the final sink was analysed.
The study site is located ∼800 m west of a large Zn Pb smelter complex (Miasteczko Śl., southern Poland; 50°30′16" N, 18°54'19" E), within a 13 ha drained wet meadow (Fig. 1 a and b).The organic layer (histosol) has a thickness of 0.2–0.6 m and lies directly on fluvioglacial sands and gravels in the area of shallow groundwater discharge …
Standard alloy for machining with chip removal. It has excellent workability characteristics for chip removal. The balanced chemical composition guarantees reduced chip …
History of the Abbreviations . There are eleven element abbreviations that don't seem to match their modern names. Those are subtle reminders of the history of the Periodic Table and the process of …
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 …
Cu and Zn were also strongly correlated (r = 0.82), and they had a weaker correlation with Pb (Pb-Cu, r = 0.5; Pb-Zn, r = 0.35). This seems to indicate that Fe and Mn are elements that can share similar sources; in fact, they have been reported as elements of natural or mixed origin ( Dehghani et al., 2016 ), in studies of heavy metals.
1. Introduction. Contamination of soils with metals, including Cd, Pb and Zn, causes soil degradation, which is mostly originated from human activity, posing a threat to soil health and compromising its ability to perform its functions (Kumpiene et al., 2009; Pereira et al., 2018).Mining is one of the main sources of metal pollution for soils, …
Fig. 2 (a) exhibited the N 2 adsorption/desorption curves of FMH5 and FMH7, and the textural characteristics were tabulated in Table S2.It could be observed that the N 2 isotherms were corresponded to a type IV, and the loop observed was classified as type H3 hysteresis loops according to the IUPAC classification (Zhong et al., 2018).The …
We present a global synthesis of Cu, Zn, Pb and Ga contents of mafic dike complexes and volcanic rocks associated with 259 ophiolites, ranging in age from Archaean throughout the Phanerozoic. These ophiolites are geochemically classified as. We present a global synthesis of Cu, Zn, Pb and Ga contents of mafic dike complexes and volcanic rocks ...
The Arqiale Pb Zn Cu deposit is located in the Wusun Range, Western Tianshan, China. Prograde and retrograde skarn minerals are abundant and associated with the Pb Zn Cu mineralization. Given that the orebodies are stratabound and hosted in limestone and causative intrusions were not identified, the genetic relationship between …
The increasing solubility of sulfur promotes Cu, Pb and Zn transport as hydrosulfide complexes relative to chloride at high temperature. As expected, the …
Request PDF | On Nov 1, 2023, Zhan-Ke Li and others published A giant porphyry-skarn-epithermal Mo-W-Cu-Zn-Pb-Ag metallogenic system in the Nannihu ore field, southern North China Craton ...
Volcanogenic massive sulfide (VMS) deposits are the third most important sources of base (and precious) metals in Iran after porphyry-type Cu–Mo and sediment-hosted Zn–Pb deposits (Maghfouri 2012; Mousivand et al. 2018).Thirty-one significant VMS deposits and several tens of VMS mineral occurrences ranging in age from Late …