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These mechanisms can serve as potential tools for bioremediation of heavy metal polluted sites. 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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This shows that the traditional gold mining process in Jendi village does use mercury for the process of separating gold ore with sand and mud. Heavy metals can be divided into two types, there are essential heavy metals and non-essential heavy metals [8] : Essential heavy metal Such as Zn, Cu, Fe, Co, Mn and Se is required by living things ...
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This may be explained by leaching, translocation, and accumulation of heavy metals released from the mining into the soils. The contents of heavy metals had the order Zn>Pb>Cu. The results also indicated that the mining wasteland was severely polluted by combined heavy metals and might cause ecosystem problems and impacts …
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In this study, chemical and mineralogical characterizations of gold-mine tailings in key mining areas in Mindanao, Philippines were investigated for possible utilization as geopolymeric source material. Results of X-ray fluorescence (XRF) and energy dispersive X-ray spectroscopy (EDS) showed that the mine tailings samples …
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Surface mining produces a large amount of particulate matter (PM) (Patra et al., 2016b).PM is released during drilling, hauling, loading, and waste handling or dumping into a pit (Hilson and Murck, 2000) (Fig. 1).Furthermore, PM is defined as fine solid aerosols with varying aerodynamic diameters that can be used to indicate air pollution by various …
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The total discharge of heavy metals has been declining. The integrated utilization rates of major strategic mineral resources, such as Ni-Co laterites, have been significantly improved. The by-product Co has been also utilized. The utilization of REE, Nb, Ta, Zr, Hf, etc., have been gradually shifted from extensive to refined mode.
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This section applies to non-metal, chemical, gold, metallurgy, non-ferrous metals, petroleum, coal, and other industries. ... This article requires the disposal and comprehensive utilization of mining wastewater. After collecting and processing mine water, such as pit gushing water, underground gushing water, and flat tunnel gushing …
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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. The average concentrations (mg/L) of heavy metals from the pristine sites ranged from 0.003 (As) to 0.929 (Fe), and the mining …
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Heavy metal contamination stemming from lead and zinc mining and processing operations is a prevalent and pressing environmental issue. This review article explores the multifaceted dimensions of this problem, examining the primary sources of contamination, which encompass mining activities, production and processing …
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Heavy metals seep into rocks, accumulating in raw materials, and releasing pollutants into the environment. 3 All of this happens naturally, either as a result of rainfall, melting snow, or groundwater. 9 Many ores, mining precious metals, such as gold (Au), copper (Cu), 10 arsenic (As), mercury (Hg), cyanide, and uranium (U), contain high ...
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By summarizing the chemical composition of typical gold tailings, it is found that the gold tailings mainly contain SiO 2, a certain amount of CaO, Fe 2 O 3, Al 2 O 3, …
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Gold mining is associated with serious heavy metal pollution problems. However, the studies on such pollution caused by gold mining in specific geological environments and extraction processes …
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Benavente M, Moreno L, Martinez J (2011) Sorption of heavy metals from gold mining wastewater using chitosan. J Taiwan Inst Chem Eng 42:976–988. ... Okujeni C (2008) Utilization of fly ash for treatment of coal mines wastewater: solubility controls on major inorganic contaminants. Fuel 87:2450–2462. Article Google Scholar
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[14] Chen Y. 2017 Review on Remediation and Safety Utilization of Heavy Metal Pollution of Farmland Soil in China J. Modern Agricultural Science & Technology. Google Scholar [15] Hu M, Wu J Q, Peng P Q et al. 2014 Assessment model of heavy metal pollution for arable soils and a case study in a mining area J. Acta scientiae circumstantiae 34 423-430
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Mine tailings contain finer particles, crushed rocks, dugout-soil, water, and organic and inorganic metals or metalloids, including heavy metals and radionuclides, which are dumped as waste or non-economic by-products generated during mining and mineral processing. These abundant and untreated materials seriously threaten the …
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Tailings from gold mining activities have resulted in significant environmental ... 2016). The current treatment methods for gold mine tailings are secondary utilization and ecological restoration ... the efficacy of direct phytoremediation is limited by the low nutrient content and high levels of heavy metals in gold mine tailings. ...
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Gold mining produces hazardous tailings wastes with elevated sulfur content and high levels of heavy metals including oxyanion elements such as V and As. This …
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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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They found that soluble/exchangeable heavy metals fraction was decreased and heavy metals bioavailability was alleviated with increase in temperature. When the temperature exceeded 550 °C, the adsorbed Cd(II), Pb(II) and Zn(II) were transformed into oxides and have enriched in phytoremediation residue biochars.
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Artisanal and small-scale gold mining, production of cement and non-ferrous metals (including Cu, Pb, Zn, aluminum and large-scale gold production) and disposal of Hg wastes are some of the main sources of environmental Hg contamination.29 Artisanal and small-scale mining is highly practiced in some sample sites in Kumasi, and during …
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Identifying driving factors of soil heavy metal at the mining area scale: Methods and practice Chemosphere. 2024 Feb ... Key Laboratory of Gold Mineralization Processes and Resource Utilization, MNR, Jinan, 250013, China; Shandong Provincial Key Laboratory of Metallogenic Geological Process and Resources Utilization, Jinan, 250013, China ...
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One of the foremost issues for the current society is heavy metal pollution which is caused owing to recent extraordinary urbanization and industrialization. The impact of metal contamination on the agricultural fields/soils results in contamination of food sources and reaching the human food chain. The heavy metals (HM) and metalloids …
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Mining is the foundation of the modern industry ... Potential utilization of artisanal gold-mine tailings as geopolymeric source material: preliminary investigation. SN Appl. Sci., 1 ... Immobilization of sulfates and heavy metals in gold mine tailings by sodium silicate and hydrated lime. J. Environ. Chem.
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1. Introduction. Periodic table consists of heavy metals to a notable portion with high density and atomic weight. Among them, the majorities are found in the biosphere, such as in water, soils, and rocks, and are also released into the surroundings from anthropogenic resources, mostly commercial and industrial.
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Mineral waste can be defined as a material leftover from exploration, mining and quarrying operation that cannot find a productive use. It is the high-volume material that originates from the excavation and physical and chemical processing of a wide range of metalliferous and non-metalliferous minerals by opencast and deep shaft methods [].The …
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C n is the measured concentration of each assessed heavy metal element, B n is the geochemical background value of this element found in the soil (Supplementary Table S4), and factor 1.5 is the natural fluctuation of heavy metal content during diagenesis. I geo was divided into seven classes (Class0-Class6) (Supplementary Table …
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Utilization of activated carbon from coconut shell in remediating heavy metal waste in soil around mining area August 2019 IOP Conference Series Earth and Environmental Science 311(1):012012
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Small-scale mining in the Philippines lacks research and technologies for the application of an inexpensive and environmentally sound treatment of its wastewaters. Hence, laboratory-scale fixed-bed column tests were carried out to test and evaluate the sorbent adsorption performance of the Philippine Natural Bentonite (PNB) and the …
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Abstract. Mining generates large volumes of waste, which if not regulated can release toxic metals, causing widespread environmental contamination. This study …
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By summarizing the chemical composition of typical gold tailings, it is found that the gold tailings mainly contain SiO 2, a certain amount of CaO, Fe 2 O 3, Al 2 O 3, MgO and a small amount of precious metals (such as Au, Ag) and heavy metals (such as Cu, Pb, Zn). Therefore, comprehensive utilization of effective chemical components in …
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