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Reported leachate contained 36.3 g/L Cu, 3.15 g/L Zn, 1.15 g/L Ni, and 1.6 g/L Fe. Calcinated at 400 °C and leached by sulfuric acid. Leachate was treated with NaOH at pH 3 to remove Fe. Zn powder was added to precipitate Cu. Zn powder was added again at pH 4 to remove Ni. Unreported product composition: Unreported residue composition
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The present study aimed to prepare a high-performance IMEF and efficient recovery of Zn and Pb. The effects of roasting conditions on the volatilization of Zn, Pb, …
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Pb, Cu and Cd can be replaced by adding zinc powder to the leaching solution. The zinc can be recovered from the purified solution by electrolysis with a …
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The most important parameters to prepare LTA zeolites with the highest adsorption performance for Cu (II) 99.3%, Zn (II) 94.9% and Cd (II) 99.0% can be …
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Metallurgical waste originating from the Zn and Pb refining process presents varying chemical composition and physical properties and contains varying quantities of pollutants. In the study, both fresh and weathered samples of production slag from the final Pb refining process were used to determine its physical parameters and chemical …
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The influence of temperature, process time and the S:L (solid/liquid) ratio on the selective extraction of Pb, Zn, Cu and As into targeted products under leaching …
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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 …
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2.1. Sampling. Water, soil, forage, and milk samples were collected in May 2017 from 10 small cattle farms (about 5–25 cows from the Romanian Simmental and Holstein Friesian breeds) in a former mining area that is known for regularly delivering milk to the central market of the city of Baia Mare (north-western Romania) [].All mining and …
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Figs. 1 a–c and S2–S4 of SI collate the XRD patterns of the raw mixture and the sintered samples (600−950 °C) of (Al + Fe):Pb:Zn series with molar ratios of 2:1:1, 2:1:2 and 2:2:1, respectively. Peak intensities of both PbO and ZnO are very high in the raw mixture of the above three systems, but were decreased significantly after sintering at …
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A new method in which Pb/Zn smelter waste containing arsenic and heavy metals (arsenic sludge), red mud and lime are utilized to prepare red mud-based cementitious material (RCM) is proposed in ...
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The Izok Lake volcanogenic massive sulfide (VMS) deposit, one of the largest undeveloped Zn–Cu resources in North America, has a well-documented fan-shaped indicator …
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The maximum adsorption capacities of Cu and Zn were 10.27 and 6.48 mg/g was achieved with PHBC while the maximum Pb adsorption capacity of 17.57 mg/g was achieved by SDBC suggesting that removal of Cu and Zn was more dependent upon interactions with the surface with functional groups than Pb.
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Cu: Pb: Sn : Others - max 0.3: max 0.3: max 0.05: 57 - 59: 2.5 - 3.5: max 0.3: total 0.2 : Zn - remainder : Mechanical properties of grade CuZn39Pb3 ( CW614N ) Rm - Tensile strength (MPa) (R380) 380: ... Material condition designated by the minimum value of tensile strength requirement for the product with mandatory tensile strength and ...
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Pb, Cu and Zn concentration in filtrate samples taken from runoff-filter pilot test bench during the first 30 min. Source publication. Experimental investigation of a filter with …
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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 …
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The relation between reaction time and the adsorption of Zn(II), Pb(II) and Cu(II) at pH = 5.0 is shown in Fig. 2b,d. The reaction rate and adsorption capacity for Pb(II) were higher than those ...
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The optimal temperature, mass ratio of RS/IO and time were separately 1100 ℃, 1:1 and 45 min. Under above optimal condition of any factors, the stabilized efficiency of Pb and Cu was always higher than that of Zn, As and Cd, while the order of the reduced bioavailability of HMs from high to low all always was Pb, Cd, Zn, Cu and As.
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In this study, copper slag was treated by carbothermal reduction technology for preparing an integrated micro-electrolysis filter (IMEF) and recovery of Zn and Pb.
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The amount of added seed crystal, was 6 wt% of raw material. The mixture thus prepared was stirred 6 h and then transferred into a 100 L stainless steel autoclaves and maintained at 160 °C for 36 h. ... Modified clinoptilolite was added to Zn, Pb, Cd, or Cu nitrate solutions with a clinoptilolite/solution ratio of 10 g/L. ... for 240 min ...
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The formula of the raw materials used in its production is given in Table 1. Clinker B (Fig. 1) was made from industrial raw materials in a laboratory furnace. To increase the heavy metal content in clinker B, a modified raw material formula was used (Table 1). Quality tests were carried out to assure the quality of both cements.
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A solid solution is a homogeneous mixture of two or more elements in a solid state. In the case of the Cu-Zn system, the solid solution can form between copper and zinc in various proportions. At low temperatures, the Cu-Zn phase diagram shows that there are two primary phases: alpha (О±) and beta (ОІ).
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The imbalance between raw materials of high economic importance and their supply has increased the search for new approaches to obtain valuable elements from mining tailings. In this study, the extraction of copper, zinc, and lead from sulfidic tailing in sulfate–chloride media was investigated. A 33 Box–Behnken design was applied to …
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Primary metal production operates with large tonnages and takes advantage of economies of scale. Metal recycled from low-value waste streams, competing in the same global metal market as primary production, will be more competitive by also taking advantage of up-scaling. However, an overview of metal tonnages in low-value waste …
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The leaching liquor contained also other accompanying metal cations such as Pb, Fe, Al, Cd, and Cu. In turn, Trpčevská et al. leached the fine-grained fraction of the zinc ash (−1.25 mm). The main constituents of the material (55% Zn, 14% Cl) were metallic zinc, simonkolleite, zinc oxide, and zinc hydroxide chloride.
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In the present study, waste materials from metallurgical processing and from mineralogical extraction will be investigated. A chemical and mineralogical characterization of different types of slag and mining waste originating from the former Pb–Zn mining industry was performed in order to gain a better understanding of the waste properties, …
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The phase composition and pollution characteristics of the soil were observed. The soil pH was 4.95 ± 0.5, indicating acidic soil. XRD patterns (Fig. 1 c) showed that the main crystalline minerals in the soil were quartz, calcite, and magnetite, with some Pb, As, and Cu existing in the form of lead arsenate and dioptase, although with small peak areas.
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The presence of secondary Zn raw materials and recycling of Zn are increasingly important. Outotec has designed a hydrometallurgical process to produce especially high-grade Zn from fume oxides, e.g., Ausmelt TSL and Waelz furnaces. The process includes washing and leaching stages and in the case of raw materials …
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These results suggested that high temperature sintering was beneficial to the immobilization and solidification of heavy metals, and the solidification effect of Pb, Cd and Zn in cement raw meal was better than Pb. Download: Download high-res image (571KB) Download: Download full-size image; Fig. 5.
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This research was conducted in order to determine As, Cd, Cu, Fe, Pb, and Zn concentrations in soil and parts of wild rose (Rosa spp., predominantly Rosa canina L.) in the Bor area, known for more than 100 years of mining and pyrometallurgical production of copper, as well as to determine the possibility of its usage as an environmental …
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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, …
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