Summary. Land use change driven by mining is a major environmental concern, affecting ecology and local populations via habitat destruction, water use, and pollution. The …
Abstract. The geologic profile of the western United States lends itself to naturally elevated levels of arsenic and uranium in the groundwater and can be aggravated by mining. The Navajo Nation, located in the American Southwest, is the largest contiguous Native American Nation and has over a 100-year legacy of hard rock mining.
1. Introduction. Abandoned mining-metallurgy sites are sources of environmental pollution. This contamination is a result of mine drainage, waste disposal, subsidence and other phenomena [1], [2].Specifically, Hg mining and processing are frequent causes of environmental concern because of the abundance of Hg and other …
The efficiency of iron ore mining plays a pivotal role in advancing both low-carbon transition and green recovery initiatives. A key focus in these endeavors is the …
Mining operations play a pivotal role in releasing various heavy metals into the environment, significantly contributing to lead, zinc, manganese, iron, and copper contamination (Hu et al., 2020). The extraction of minerals through mining processes is a primary source of these contaminants, leading to widespread ecological and human …
Heavy metals in soil are harmful to natural biodiversity and human health, and it is difficult to estimate the effects accurately. To reduce pollution and manage risk in coal-mining regions, it is essential to evaluate risks for heavy metals in soil. The present study reviews the levels of 21 metals (Nb, Zr, Ag, Ni, Na, K, Mg, Rb, Zn, Ca, Sr, As, Cr, Fe, Pb, …
Coal mining activities were generally well documented and detailed plans would have been produced in most cases. County or national archives may hold copies of large-scale plans and sections that would indicate where colliery waste was disposed. Walkover. The walkover should consider how the surface morphology reflects the underlying material.
Following rainfall, variations in groundwater turbidity may be an indicator of surface contamination. Color. Can be caused by decaying leaves, plants, organic matter, copper, iron, and manganese, which may be objectionable. Indicative of large amounts of organic chemicals, inadequate treatment, and high disinfection demand.
Mine drainage is surface water or groundwater that drains from an active or abandoned mine. In some cases, pyrite (an iron sulfide mineral) is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing ...
Washable Ores 1910–1980s. Mesabi Range low-grade iron ore mining began in 1910, with the extraction and processing of silica-laden deposits called washable ores (Van Barneveld 1913 ). Washable ores contained about 40% iron upon extraction, a …
The effects of mining for the clean energy transition. Global climate change is understood to be the most pressing environmental issue facing humanity today. …
Samples were collected from the ion-adsorption rare earth mining area located in Dingnan County, Ganzhou city, Jiangxi Province. The mine site has been mined for more than 20 y, and has left an area of 10 km 2 mine tailings. Dingnan County belongs to the subtropical monsoon humid climate zone, with an average annual temperature of …
Site contamination. The studied site, the Xikuangshan mining area, is situated between 27.7°N and 111.4°E in Hunan Province, in southwest China (Fig. 1; He 2007).The Sb ore zone, which is about 2 km wide and 9 km long, sits in the northern part of the Xiangzhong Basin, a specific low-temperature mineralization depression zone with …
1. Introduction1.1. Soil quality and soil contamination. Soil quality is, mainly, "the capacity of a soil to operate, inside characteristic or overseen environment boundaries, to perform ecosystem services, to maintain plant and creature productivity, keep up or upgrade water and support human wellbeing and habitation" (Triantafyllidis et al., 2018; …
Mining affects fresh water through heavy use of water in processing ore, and through water pollution from discharged mine effluent and seepage from tailings and …
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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 …
Metal contamination is not restricted to the mining site only because considerable release of metals occurs through acid mine drainage and erosion of waste dumps and tailing deposits ... The extent to which iron ore tailings are produced at different washing plants in India from iron-ore mining activities is presented in Table 1. From the ...
The main question of the present study is how much are the former post-mining mounds (PMM) - the ancient remnants of mining of a provisional nature located in forest areas-contaminated by heavy metals (HM). To investigate if the PMM contain HM, we collected 15 soil samples from PMM and, for comparison, 15 from the surroundings - all …
The microbial community and functional flora in rare earth mining areas are correlated, but the characteristics and metabolic pathways of pollutant in such mining areas are still poorly known. The heavy metals, rare earth elements, and microorganisms present after mining of rare earth mine sites were analyzed. After mining, all sampling sites …
Published 10:58 AM PDT, May 12, 2023. DULUTH, Minn. (AP) — Federal authorities have proposed new regulations that would force the Minnesota and Michigan iron mining industry to slash its mercury emissions. The rule announced by the U.S. Environmental Protection Agency last week follows two decades of litigation and other pressure by …
The objective of this research was to evaluate a soil recovery strategy in soils that were affected by iron mining tailing using herbaceous species inoculated with Acaulospora morrowiae (arbuscular mycorrhizal fungus (AMF)). Tailings were collected on the banks of the Gualaxo do Norte river, one of the places impacted by the Fundão Dam …
Current concepts of soil transformation and contamination in iron ore mining areas have been reviewed. Changes of soils and ecosystems in the mining areas are among the largest-scale impacts of economic activity on the nature. Regularities in the radial differentiation, spatial distribution, and accumulation of heavy metals in soils of …
Tailings from iron mining are characterized by high concentrations of iron and manganese oxides, as well as high pH values. With these characteristics, most of the potentially toxic elements (PTE) contained in the tailings are somewhat unavailable. The aim of the present study was to evaluate how a …
Previous reports of heavy metal contamination, iron, and chromium are reported in some locations of India over acceptable discharge/permissible limits due to improper mining and industrial ...
Sulfidated nano-scale zerovalent iron (S-nZVI) has emerged as an advanced functional nanomaterial for efficiently remediating Cr(VI) contamination in aqueous environments. However, there is an insufficient understanding of its coherent process, removal pathway, and hydrochemical reactive mechanisms, presenting potential challenges for its ...
The objectives of the study are to present a critical review of the 238U, 234U, 235U, 226Ra and 210Pb levels in water samples from the EPA studies (U.S. EPA in Abandoned uranium mines and the Navajo Nation: Red Valley chapter screening assessment report. Region 9 Superfund Program, San Francisco, 2004, Abandoned …
This study aims to assess the metallic contamination of soils and water resources in the environment of the Ouixane mining area (North East Morocco). Six metallic elements (Fe, Cu, Pb, Zn, Ni, and Cd) were analyzed by ICP-AES and ICP-MS. To evaluate the contamination of the soils, three contamination assessment methods …
The contamination of water resources in mining regions basically follows two pathways (1) AMD discharge into the surface water through runoff or wind dispersal of …
Influence of iron mining activity on heavy metal contamination in the sediments of the Aqyazi River, Iran. Published: 15 July 2020. Volume 192, article number …
These long-standing mining and metallurgy activities have had documented environmental impacts, with previous studies highlighting HMs pollution in the soil (Xu et al., 2021), water (Zhang et al., 2014), and air quality (Chen et al., 2022a).Although large mining pits have been closed in the interest of environmental protection, as of the most recent …
Increased mining activity of iron ore has led to the generation of voluminous wastes of various nature, especially during the different stages of its extraction and …
The records show that at average flows, more than 50 million gallons (189 million liters) of contaminated wastewater streams daily from the sites. In many cases, it runs untreated into nearby groundwater, rivers and ponds — a roughly 20-million-gallon (76-million-liter) daily dose of pollution that could fill more than 2,000 tanker trucks.
The aim of this work is to evaluate the routes and effects of arsenic contamination in environmental compartments (air, water, and soil) and in environmental organisms (fish and vegetables) from a mining …
Abstract. The main question of the present study is how much are the former post-mining mounds (PMM) - the ancient remnants of mining of a provisional nature located in forest areas-contaminated ...
The fundamental issue involves contamination of nearby rivers, lakes, and aquifers by what comes out of a coal mine—usually highly acidic water containing heavy metals like arsenic, copper, and lead. The process is known as acid mine drainage. It happens when certain substances (typically iron sulfide, FeS2, or fool's gold) is oxidized ...