The results reveal that (1) heavy metal pollutants are identified as lead (Pb), zinc (Zn), copper (Cu) and arsenic (As), displaying enrichment at the interface layer …
In addition, BS could mitigate the contamination risk of the lead‑zinc tailings, by reducing the readily leachable Pb(II) concentration from 0.81 mg/L (over the regulatory limit of 0.1 mg/L) to ...
The zinc extraction from Kooshk lead–zinc tailing dam's sample was investigated by bioleaching method. The Kooshk lead–zinc deposit/mine is located in Yazd province, Iran, and its tailing dam contains about 3.64% zinc, 0.97% lead and 24.18% iron. Experiments were designed and carried out by a mixed culture of mesophile bacteria as …
Fig. 1. Graph showing the dam height ( H in meters) at time of failure, vs. the run-out distance of tailings following dam breach ( Dmax in km) for the historical failure cases, with numbers keyed to Table 1. The envelope curve for run-out distance from all the tailings dams has the equation: (2) D max = 0.01 × H 3.23.
AbstractThere are large volumes of lead-zinc tailings (LZT) produced in China and elsewhere in the world. LZT disposal to the landfill is problematic and causes many environmental issues. ... "Analysis on tailings generation and comprehensive utilization of typical lead-zinc concentration enterprises in China." Environ. Prot. Circ. …
The tailings dam was reaching capacity for conventional wet tailings deposition and so Hindustan Zinc needed a way to resolve this issue. The solution they required would involve creating a small dry-stack tailings area with minimised environmental and physical footprint and also a method to backfill the mine by using an adjusted dry filter ...
The goal of recycling lead–zinc tailing (LZT) as. cemented paste backfill ( CPB) is to eliminate two current major problems faced by lead–zinc mining: Minerals 2019, 9, 710 2 of 16 ...
The residues from the extraction of lead/zinc (Pb/Zn) ores of most Pb/Zn mines are permanently stored in tailings ponds, which require revegetation to reduce their environmental impact.
slurry concentration was 70%, the maximum unconfined compressive strength (UCS) of the CPB ... lead–zinc tailings; cemented paste backfill; immobilisation materials 1. Introduction ... other is that tailing ponds will face the risk of a dam break with the accumulation of tailings [4]. In recent years, the backfill mining method, which fills ...
When the dosage of TMT reaches 4%, the leaching concentration of lead and zinc is 0.18 and 14.60 mg/L according to toxicity characteristic leaching procedure (TCLP), and the stabilization ...
Lead-zinc tailings used for this study were collected from a lead-zinc mine plant in Shaoguan, China. Lead-zinc mine tailings were prepared by crushing and screening the material to particle sizes below 74 μm. ... The initial bacterial concentration in the bioleaching medium was determined in a cell counting chamber using phase …
Abstract. China is the largest producer of lead and zinc concentrate in the world. The lead-zinc mines of China are used to produce multiple products simultaneously. To evaluate the specific environmental impact of the lead-zinc ore mining and beneficiation, life cycle assessment (LCA) was performed by SimaPro 8.5.2 software in this paper.
Abstract. This study applied steel slag (SS), blast furnace slag (BFS), flue gas desulfurised (FGD) gypsum and fly ash (FA) as clinker-free cementitious materials for …
The degree of extracting lead from the activated tailings increases according to the Fourier law when decreasing the NaCl mass concentration, and an optimal range of the H2SO4 (0.38–0.51% ...
Tailings from Aba zinc-lead concentrator cannot be discharged in tailings dam by traditional wet disposal method due to the location restriction and environmental consideration.
The data below is a data collected form a Concentrator that produces Lead (Pb) and Zinc (Zn) concentrates from a complex ore. calculate; i. the recovery of Pb in lead concentrate ii. the recovery of Zn in Copper concentrate iii, the tonnage (tph) of the lead concentrate iv. the tonnage (tph) of the Copper concentrate v. the tonnage (tph) tailings Stream Throughput …
Arsenic, iron and cyanide were identified as the major pollutants in the tailings dam wastewater with average concentrations of 4.5, 25.2 and 11.1 mg·L-1, respectively. Arsenic, iron and free CN ...
The total body concentrations of Pb, Cd, and fluoride were higher at the contaminated grassland site established on fluorspar tailings compared to an uncontaminated control site for all three species of small mammal, Apodemus sylvaticus, Microtus agrestis and Sorex araneus. Zn was also higher in M. agrestis and S. araneus but in A. sylvaticus it …
Expand. The Los Frailes open-pit mine. Los Frailes has a design capacity of 125,000t/y of zinc, 48,000t/y of lead, 4,700t/y of copper and 90.8t/y of silver. Output in both 1998 and 1999 was affected by the mine's suspension, but had reached around 90% of design capacity by late 1999. Los Frailes uses conventional open-pit mining methods to ...
Tailings containment dam failures cause severe environmental, social, and economic impacts. Analyzing past occurrences allows society and decision-makers to improve storage facility safety. This study presents an overview of tailings dam failures, exploring historical aspects and environmental consequences. Two methodological …
The TCLP test revealed that an increase in curing days led to a significant reduction in heavy metal leaching rate (cobalt, zinc, lead, nickel, copper, arsenic, …
One of the advantages of building material production in sustainability is the ability to utilize large amounts of industrial solid wastes, and the use of lead–zinc …
vicinity of lead and zinc mining sites in eastern China were found to contain lead and cadmium in concentra-tions that were 20–30 times higher than permitted …
A two-dimensional model of the tailings dam and properties of its lithological features. 3 Unsteady-state solute migration was simulated based on the steady-state flow. Zinc was selected as a representative heavy metal for the simulation because it had the highest concentration in the batch leaching
The lead–zinc tailings were taken from a lead–zinc mine in Huludao City, Liaoning Province, China. The basic physical parameters of the lead–zinc tailings are shown in Table 1.The XRF test results of lead–zinc tailings are shown in Table 2, and the SEM, EDS and XRD test results are shown in Fig. 1.Among them, XRF was detected by …
Tailings of base metal mining, including lead, zinc, nickel, and copper that occurs in most cases as sulfides, can be a significant source of toxic elements or a raw material for valuable elements recovery (Alcalde et al. 2018; Behera et al. 2020; Nassiri et al. 2021). Depending on the weather conditions, metal sulfides can be oxidized and ...
The tailings were composed mainly of pyrite (76%), together with quartz, gypsum, clays, and sulfides of zinc, copper, and lead. The pH of the pore waters fell to …
The tailings dam of the Kooshk lead-zinc mine was found to contain approximately 3.64% zinc, and more than 90% of sphalerite was leached within 14 days …
The project is expected to cost $453 million. Mining is anticipated to begin 42 months after all of the finance and insurance is secured. According to a 2019 draft Environmental Impact Assessment Addendum, the mine life will be 10 years. -The developers will likely construct a tailings facility near the mining site, where toxic waste …