Simultaneous removal of Pb, Cr, Cd, Cu, Ni and Zn from
Request PDF | Simultaneous removal of Pb, Cr, Cd, Cu, Ni and Zn from urban stormwater runoff using low-cost agricultural/industrial sorbents | Urban stormwater runoff ...
Request PDF | Simultaneous removal of Pb, Cr, Cd, Cu, Ni and Zn from urban stormwater runoff using low-cost agricultural/industrial sorbents | Urban stormwater runoff ...
The raw materials of Cu-Ag-Zn-Mn-Ni-Si-B-P multi-alloy are Cu, Ag, Mn, Zn, Ni and Si with a purity of ≥99.99 %, as well as Cu-P and Ni-B intermediate alloys, and the alloy ingots are prepared by a high-throughput induction melting furnace system with the model SP-50KTC-M, and the size of the ingot corresponds to 5 × 10 × 40 mm (T × W × L), and 10 alloy ingots with …
Request PDF | Predicting the optimum compositions of high-performance Cu–Zn alloys via machine learning | In the alloy materials, their mechanical properties mightly rely on the compositions and ...
In the current study, we propose a"composition-oriented " design method for high-performance wear-resistant Cu–Zn alloys via machine learning. We use the multi-layer feed-forward ANN …
The redistribution of bioavailable fractions of Cu differed from those of Zn (Fig. 2).In terms of the total bioavailable content, the proportions of Exc-Cu and Red-Cu accounted for 40.47–86.20 % of the total Cu, while the proportions of Exc-Zn and Red-Zn were significantly higher (87.26–98.71 %), and these results are similar to the previous findings [27].
The processing of fine dust from copper smelters in Kazakhstan is an urgent task. The currently used technology of hydrometallurgical dust processing, which involves leaching with sulfuric acid to produce lead cake and a solution containing copper and zinc, fails meet modern requirements. The significant content of arsenic in the dust (up to 15%) hinders the production …
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Fig. 1 illustrates the SEM photographs of the microscopic morphology of the experimental raw material powders. Pure Cu particle (99.9 % purity, 30 µm), pure Zn particle (99 % purity, 30 µm) and graphite (99 % purity, 20 µm) were used as raw materials for the experiments to formulate Cu-based self-lubricating composites with different Y 2 O 3 (99 % purity, 20 µm) contents.
It is widely recognized that the overuse of fertilizers and pesticides contributes to heavy metal contamination in the soil. Indeed, fertilizers may contain traces of heavy metals such as Cd, Cu, Zn, Pb, or As (Hou et al., 2020; Lu et al., 2012; Nziguheba and Smolders, 2008).These elements are frequently incorporated into micronutrient fertilizers or as …
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.
Cu-based SMAs, especially Cu-Al-Mn SMAs, on the other hand, are another promising system because they have high superelasticity (>10%) [8], high isothermal entropy change (1.4 J/mol K), wide operation temperature window (>100 K) [9] as well as are easy to manufacture and cheaper cost compared to Ni-Ti-based SMAs.
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.
Here, we propose a "composition-oriented" method combined machine learning to design the Cu–Zn alloys with the high strengths, high ductility, and low friction coefficient. The method of separate training for each attribute label is used to study the effects of elemental concentrations on the mechanical properties of Cu–Zn alloys.
In the current study, we propose a "composition-oriented" design method for high-performance wear-resistant Cu–Zn alloys via machine learning. We use the multi-layer feed …
Thus, in mixed ions system its maximum adsorption capacity was found as 261 mg/g, 109 mg/g, 45 mg/g and 42 mg/g for Pb 2+, Cu 2+, Zn 2+ and Ni 2+ ions, respectively; the selectivity order of Pb 2+ > Cu 2+ > Zn 2+ > Ni 2+ was therefore established for both systems. Additionally, magnetic zeolite was shown to be easily separated from the treated ...
It reveals the presence of elements Cu, O, Zn, Sn and Pb from bronze powder and C from the atmosphere. In the high-resolution Cu 2p spectrum (Fig. 2 b), two spin-orbit doublets located at 933.9 and 953.9 eV are attributed to Cu 2p 3/2 and Cu 2p 1/2, demonstrating the existence of Cu 2+ and being in agreement with the characteristic peaks for ...
Electrochemical stability of biodegradable Zn–Cu alloys through machine-learning accelerated high-throughput discovery ... Utilizing high-throughput first-principles calculations and machine-learning accelerated evolutionary algorithms for screening the most stable compounds in Zn–Cu systems, a dataset encompassing the formation energy of ...
When assembled into symmetric cells, the (C 2 F 4) n-C@Cu@Zn battery exhibited a small voltage hysteresis of 30.9 mV in the first cycle (Figure 4h). Also, the (C 2 F 4) n C@Cu@Zn||V 2 O 5 showed a discharge capacity of 140 mAh g −1 in the first cycle, and the discharge-capacity retention reached 88.35% after 2500 cycles at 3 A g −1 (Figure 4i).
The synthesized CaAl-layered double hydroxide (CaAl-LDH) shows excellent performance in potentially toxic metals (PTMs) removal, and the removal capacity of CaAl-LDH toward Cu 2+, Zn 2+ and Pb 2+ in aqueous solution is 502.4, 315.2 and 600.0 mg/g respectively. Cu 2+ and Zn 2+ are removed through isomorphic substitution of laminate Ca and dissolution …
In this review, we provide a systematic overview of the modification of copper-based CCs and their application in zinc metal anodes. The relationships between their …
Fine dust from copper smelting plants is an important source of raw materials for the extraction of various valuable metals. A specific feature of dust from copper smelting plants in Kazakhstan is their high arsenic content of up to 15%. This work shows the possibility of hydrometallurgical processing of fine dust from copper smelters, obtained during the …
By comparison to AMD released from metallic mines, the AMD that occurs at both operating and abandoned coal mines is generally characterized by a low pH and often by high concentrations of dissolved metals such as Fe, Al, and Mn but low concentrations of heavy metals such as Zn(II), Cu(II), Cd(II), and Pb(II) [3].However, the flowrate of AMD in coal mines is …
Non-ferrous metals are important materials of strategic significance in China (Wang and Feng, 2018).China is one of the largest producers and consumers of non-ferrous metals in the world, the production capacity of ten typical non-ferrous metals in 2018 has exceeded 58 million tons, including >9 million tons of zinc (Zn) and 5 million tons of lead (Pb) …
Flotation with NBs, generated in the presence of a frother, could be considered for the Pb-Cu rougher stage where can lead to a higher mass recovery and Zn selectivity index. …
Contribute to legaojm/m development by creating an account on GitHub.
The effect of sulfuric acid concentration on the extraction of Zn, Pb, and Fe from high silica Pb–Zn oxide ore is shown in Fig. 3. The following leaching conditions were applied: time: 90 min, temperature: 150 °C, air pressure: 0.8 MPa, stirring rate: 700 rpm, L/S: 5:1, and ore particle size: 75–80 μm.
The sum of Zn, Cu, Cd and Pb concentrations determined in the soil was equal to 523 mg, more than three times lower compared to the Fe content (1836 mg). The rhamnolipids leached a total of 60 mg of heavy metals from the soil compared to 234 mg of Fe at the 1 × CMC soil biosurfactant concentration, and 91 mg of heavy metals and 341 mg of Fe ...
Zn removal efficiency continuously increases as zeolite dose is being increased up to the last dose of 1200 mg/L which obtained 79.17% removal. However, Pb, Cu and Mn with highest removal efficiencies of 62.47%, 86.54% and 90.53% respectively all decreases as the zeolite dose is being increased.
Float Metals One-by-One Selectively: Since our objective is to sequentially float Copper, then Lead, than Zinc while rejecting Pyrite, let us explore how we can separate …
Here, we propose a "composition-oriented" method combined machine learning to design the Cu–Zn alloys with the high strengths, high ductility, and low friction coefficient. The method of separate training for each …
filter paper 42 and the concentration of Cu (II), Zn (II) and Pb (II) metal ions in a filtrate was measured using an Atomic Adsorption Spectro-photometer AAS (Optima 4300 DV ICP,
Float Metals One-by-One Selectively: Since our objective is to sequentially float Copper, then Lead, than Zinc while rejecting Pyrite, let us explore how we can separate Cu/Pb/Zn from Fe: pH 6-6.5 is where Pb/Zn/Fe are least hydrophobic while Cu is most hydrophobic. Great pH to Recover Cu. pH 7.5-8 is where Zn/Fe are least hydrophobic while Pb ...