تعتبر شركة Olux شركة رائدة ومتميزة على المستوى الدولي في مجال البحث والتطوير وتصنيع وبيع محطات التكسير والغربلة واسعة النطاق ومعدات الطحن الصناعية ومصانع الاستفادة.
Twenty soil samples were collected from North of Atbara (Dar-Mali locality),River Nile State, Sudan (17.82289 to 17.82389N and 33.99974 to 34.02127E) inside and outside gold mining area in order ...
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Heavy metal contamination of selected rivers in the mining areas of Ghana was studied. In the study, 44 composite water samples were collected, digested, and analyzed for selected metals using ICP-MS.
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Chen et al. (2011) also indicated that the leachability of the heavy metals from sulphidic mine tailings could be eliminated by alkali-activation. While the properties of the mine tailings depend on the mineralogy of the mining site, in the present study the alkali-activation of Finnish mine tailings from a gold mining site was investigated.
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The Jinchuan Group Co., Ltd. located in Jinchang City, Gansu Province, China, is a typical resource-based enterprise (Fig. 12.1) [1].It can produce 0.2 million tons of nickel, 1.0 million tons of copper, 0.01 million tons of cobalt, 6000 kg of platinum group metals, 30 tons of gold, 600 tons of silver, 200 tons of selenium, and 5.6 million tons of various chemical products annually.
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Utilization of solid bio-waste from local wastewater treatment plants or livestock manure for amending tailings, with high concentrations of HMs, enhancing the properties of the soil to support plant growth for revegetation as well as the recovery of metal from waste, have also been planned by some mining companies in the context of the ...
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The gold mining plant of Oman was studied to assess the contribution of gold mining on the degree of heavy metals into different environmental media. Samples were collected from the gold mining ...
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The gold mining plant of Oman was studied to assess the contribution of gold mining on the degree of heavy metals into different environmental media. Samples were collected from the gold mining ...
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In addition, the non-ferrous metal mining industry worldwide is one of the main sources of heavy metal pollution. Mining produces a large amount of waste, especially fine-grained mineral tailings, which are mostly deposited on the land surface and pose potential long-term environmental challenges. ... Trichoderma viride, and Trichophyton rubrum ...
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Two bioflocculant producing bacterial isolates from mining soil samples were investigated for their application in heavy metal removal. The bacterial isolates were identified as Pseudomonas koreensis and Pantoea sp. using 16S rRNA gene. Cadmium resistant genes cadA and CzcD were detected in Pantoea sp. while P. koreensis harbor CzcD and chrA responsible …
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Despite the alarming heavy metal contamination of our waters in the mining areas across the country, information on heavy metal pollution status, extent of contamination and its ecological risks using pollution assessment indices are scarcely available which can lead to water quality deterioration and ecosystem degradation.
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well-known gold mining districts, namely ... This study was carried out to evaluate and compare the utilization of PNZ and PNB sorbents in ... effectively remove various heavy metals from aqueous ...
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Concentrations of heavy metals associated with gold, such as copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), mercury (Hg) and lead (Pb) can increase in the environment as a result of mining activities, leading to …
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Physicochemical properties, heavy metals, and metal-tolerant bacteria profiles of abandoned gold mine tailings in Krugersdorp, South Africa March 2020 Canadian Journal of Soil Science 100(3):1-17
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Before utilization, the glassware, polypropylene tubes, and Teflon beakers underwent thorough cleaning. Initially, they were washed with soap and rinsed with distilled water. ... [33] to evaluate the degree of heavy metal contamination from gold mining activities in the study area. Except for Cd and As, which were below the detection limit, ...
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This is a paper in the field of mining environmental engineering. Heavy metal pollution in soil has a long-time impact, with high biological toxicity and serious threat on human health. In order to study the present situation of soil heavy metal pollution in a lead-zinc mining area and assess its risk, a lead-zinc mining area was taken in Jiangxi as the study object, and the speciation ...
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Mining activities can lead to the generation of large quantities of heavy metal laden wastes which are released in an uncontrolled manner, causing widespread contamination of the ecosystem. Though some heavy metals …
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Mine tailings are formed as an industrial waste during coal and ore mining and processing. In the investigated process, following the extraction of gold from the ore, the remaining tailings are subjected to a two-stage chemical treatment in order to destroy the free cyanide and to stabilize and coagulate heavy metals prior to discharge into the tailings pond.
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Being a precious metal which is found in small quantities, gold mining operations tend to cover wide areas, and thus can inflict environmental damage over a geographically wide area. The …
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The gold mining plant of Oman was studied to assess the contribution of gold mining on the degree of heavy metals into different environmental media. Samples were collected from the gold mining...
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Toxic Effects of Heavy Metals Mercury (Hg) Mercury (Hg) is found in air, water, and soil and exists in three forms: elemental or metallic mercury (Hg 0), inorganic mercury (Hg +, Hg 2+), and organic mercury (commonly methyl or ethyl mercury) (Li R. et al., 2017).Elemental mercury is liquid at room temperature and can be readily evaporated to produce vapor.
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1. Introduction. Non-ferrous metal mining causes severe contamination of As and heavy metals (HMs). Due to the increasing activity and mobility in water [1,2], sediments are one of the major destinations for As and HMs migration and diffusion in the water [2,3].As and HMs accumulated in sediments are often tens or even hundreds of times the amount in water [3,4,5].
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Gold mining is the main source of As, Sb, Zn and Cd accumulation in sediments (over 40.6%). Some influential factors cannot be ignored, i.e., water transport, local lithology, proportion of …
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Mining generates large volumes of waste, which if not regulated can release toxic metals, causing widespread environmental contamination. This study focused on heavy metal contamination in...
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The challenges and opportunities for the recovery of heavy metals from tailings by biological leaching are also discussed, which will provide a valuable reference for the full exploitation and utilization of secondary resources and the industrial development of the recovery of heavy metals from tailings using biological leaching technologies.
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Heavy Metals – Definition, Natural and Anthropogenic Sources of Releasing into Ecosystems, Toxicity, and Removal Methods – An Overview Study April 2023 Journal of Ecological Engineering 24(6 ...
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SES for environmental availability of metals in Gold mining tailing. Lead and manganese present the highest mobility and availability. Human health risk assessment in a …
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The utilization of post-mining area causes serious health problem in animals and humans due to heavy metal waste pollution (Ag, As, Cd, Co, Cr, Cu, Hg, Ni, and Pb). Efforts to overcome the pollution of heavy metals on farms can be carried out by preventing and controlling waste in post-mining and industry areas.
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The contamination of soil with these heavy metal ions introduces significant environmental hazards, ranging from soil and water pollution to the disruption of ecosystems and the release of potentially deleterious substances into the environment (Li et al., 2023).The mining processes associated with copper, zinc, lead, manganese, and iron, extensively utilized in …
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It is known that the tailings of gold mines have brought serious heavy metal pollution; however, the heavy metal pollution caused by gold tailings in specific geological environments and extraction processes still must be studied. This study investigated the distribution, speciation, bioaccumulation, and pollution of heavy metals in soils from the …
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Mining activities lead to significant heavy metal pollution in nearby farmland soils, affecting the soil's microbial community and functions. To comprehensively investigate the heavy metal contamination in farmland soils caused by mining activities and the impacts on soil microbial communities and functions, we collected 87 soil samples from farmlands near 29 mining sites …
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In the past few decades, the exploration, exploitation, and utilization of mineral resources have driven the rapid growth of China's economy (Sun et al., 2021).However, mining activities also caused heavy metal (HM) accumulation in the surrounding soils.
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Mining common minerals involves managing a large mass (gangue) associated with moving a significant amount of waste generated during mining. For example, the extraction of coal, lignite, building materials, iron, and rare metals, such as copper, nickel, or gold, require drilling, crushing, handling of piles, ore loading, waste loading, unloading, and hauling (Asif et …
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In this study, based on the assessment of soil heavy metals (HMs) pollution using relevant indices, a comprehensive approach combined network environ analysis (NEA), human health risk assessment (HHRA) method and positive definite matrix factor (PMF) model to quantify the risks among ecological communities in a special environment around mining area in …
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This review focuses on the effects of heavy metal wastes generated from gold mining activities on the environment and the various mechanisms used by bacteria to counteract the effect of these heavy metals in their immediate environment.
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Different gold mining and smelting processes can lead to distinctive heavy metal contamination patterns and results. This work examined heavy metal pollution from a large-scale cyanidation gold mining operation, which is distinguished from artisanal and small-scale amalgamation gold mining, in Jilin Province, China. A total of 20 samples including one …
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This study describes the preparation of Silico-Calcium-adhesive (CS-SS) by alkali-assisted ball milling to activate copper smelting slag (CS) for the remediation of heavy metals contamination and consequent resource utilization. The adsorption behavior and mechanisms of Cd(II), Cu(II) and Pb(II) in mono-metallic and polymetallic coexisting systems were investigated.
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