— The present study analyzes the life cycle environmental impact of copper concentrate production, along with selection of a typical copper sulphate mine in China. …
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— Coal is the world's largest energy source for electricity generation and is mined on 6 continents. Sulfate contamination of surface and ground water from these mining and processing operations is well recognized and commonly monitored as a primary indicator of coal mining impact to surface water and groundwater. However, under …
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— The Lunatian gypsum deposit, located within the Dian (Yunnan Province)-Qian (Guizhou Province)-Gui (Guangxi Province) area of the South China Plate (Fig. 1 b, c), has its genesis traced back to the Late Devonian Zaige Formation (equivalent to the Frasnian to Famennian epochs internationally, Fig. 2).The gypsum orebodies in this …
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To achieve scientific planning and efficient utilization of water resources in mining areas, it is essential to figure out the chemical formation process and the ground water sulfur …
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— Therefore, the concentrations of various sulfur species in paddy soil profiles were investigated at sites downstream of the Dabaoshan sulfide mining area, South China. No significant differences in water-soluble sulfate (WS), adsorbed sulfate (AS), or total sulfur (TS) were observed between upstream and downstream paddy soil profiles.
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In most other parts of the world, sulphur mining doesn't take place at an active volcano site. More commonly it's collected as a by-product at oilfields. The process is highly mechanised and ...
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— The sulfur in Sb 2 S 3 is oxidized when it meets oxygen in the air and water during the mining process. ... In China, the Sb content in an Sb mining area in Guizhou Province was as high as 1,377 ... Antimony Pollution and Sulfur Isotope Study in the Waters of an Antimony Mine Area. Bull. Mineral. Pet. Geochem. 30 (2), 135–141. doi:10.3969/j ...
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— Sulfate (SO42–) is an important chemical species in atmospheric aerosols, which strongly impacts atmospheric chemistry processes and climate change. Stable sulfur isotopes (δ34S) of sulfate aerosols in PM2.5 were measured in Beijing from November 13 to December 2, 2018, to investigate the pathways of formation of sulfate aerosols. The …
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— High cost of sulfur. Demand for sulfur in the US will rise with the startup of domestic lithium projects, but declining interest in oil and gas refining will threaten supply as the energy transition progresses. There is also hesitance to use the Frasch process to extract sulfur from underground deposits due to its potential for environmental ...
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— Open-cast lignite and sulfur borehole mining play a pivotal role in the regional. ... [16]. In 2000, China (one of the world's largest emitters ... areas exploited by the Frasch process is fraught.
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— The research of sulfur content and logging parameters in coal seams is of great significance for accurate mining and efficient utilization of coal. Taking 81 coal samples collected from the Upper Paleozoic in North China as an example, coulometric titration and chemical reagent methods were used to determine the contents of total …
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— The total coal consumption in China is on the rise. The characteristics of CO2 and SO2 emissions in the whole process of coal processing and utilization in China are worthy of study. Based on the five links of the whole process of coal production and utilization, including coal production, raw coal processing, logistics and transportation, …
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In China, pyrite is the main resource in sulfur exploration and utilization. During 20072013, the China Geological Survey implemented the National Mineral Resources Assessment …
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Physical Properties of Sulfur. Sulfur has an atomic weight of 32.066 grams per mole and is part of group 16, the oxygen family. It is a nonmetal and has a specific heat of 0.706 J g-1 o C-1.The electron affinity is 200 kJ mol-1 and the electronegativity is 2.58 (unitless). Sulfur is typically found as a light-yellow, opaque, and brittle solid in large amounts of small …
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— Rare earth elements (REEs) are important raw materials for green technologies. However, REE mining and production uses techniques that are often not environmentally sustainable. Life cycle assessment (LCA) is a well-recognized method for evaluating the environmental impacts of products and technologies. This article provides …
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— The Canadian exports of sulfur to China rose from 31,000 t in 1995 to a peak of 3.9 Mt in 2005 . Since then, the volume declined to less than 1.0 Mt starting in 2013. ... In the late 1890s, development of the Frasch process for sulfur mining resulted in lower prices for sulfur. This change, coupled with new developments in sulfur burners, led ...
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— The soil sulfur (S) was detected to be much higher in the soil of GP than CK-near and CK-far plots. CK-near soil contained 0.1 ± 0.06% sulfur, and GP had 1.0 ± 0.21%.
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— 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.
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— The North China Craton (NCC) is one of the ancient cratons on the earth containing large amounts of the Late Mesozoic gold concentration areas, making it one of the leading gold-producing regions in China (Li et al., 2012, Zhu et al., 2015, Wang et al., 2021).Late Mesozoic gold deposits always developed at the eastern block of NCC, …
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— In East Java, Indonesia, hundreds of miners face deadly smoke to mine sulphur, or 'devil's gold', risking respiratory illness and death to haul 200-pound loads of sulphur up crater walls.
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— Tongling is a significant non-ferrous metal mining city in China, which produces waste that negatively impacts the area's water environment. It is essential to …
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— Which country is the largest producer of sulfur in the world? In 2022, China was the world's leading sulfur producer having produced over 18 million metric tons
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— To understand the distribution regularity of sulfur in coal formed during different geologic periods and their related controlling factors, we obtained statistics on the sulfur content in the coal samples from different regions of the Guangxi Province. Based on the results, we drew the following conclusions. First, the contents of the sulfur forms vary …
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— Plants release measurable amounts of S into the atmosphere when S concentrations in foliage are high due to exposure to sulfur dioxide or excessive S uptake from soil. Microbial oxidation of reduced inorganic S forms, such as elemental S, sulfides, and thiosulfates, to sulfates is an important process in soils.
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— China's earliest discovered magmatic Ni-Cu-Co mineralisation is the Limahe deposit at Huili in Sichuan Province. The deposit was discovered in 1957 and mining began in the same year and closed at the end of the 1990s [22]. The first super-large magmatic deposit in China was discovered in 1959 at the Jinchuan Ni-Cu-Co deposit in Gansu …
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— In 2023, China produced around 19 million metric tons of sulfur, making it by far the world's leading sulfur producer. Sulfur is one of the most common chemical elements found in nature.
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— 1 School of Earth Sciences and Resources, Chang'an University, Xi'an, China; 2 Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, Ministry of Natural Resources, Xi'an Center of China Geological Survey, Xi'an, China; Located in the East Kunlun Orogen, China, the Xiarihamu magmatic nickel–cobalt …
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— The research directions of CCG include, but are not limited to, cleaning potential evaluation of coal resources, geological guarantee for safe and efficient mining (providing geological information, such as faults, folding, and thickness of coal seams for mining), measuring ash yields, sulfur contents, trace elements in coal, preventing and …
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— In rural areas of China, mining activities have proven to be one of the most serious sources of soil heavy metal pollution ... In this study, the mining process of one tonne of copper-sulfur raw ore was selected as the functional unit. One tonne raw ore would be approximately transformed into 0.03 tonne of copper concentrate, 0.14 tonne of high ...
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— Microbially-driven sulfur cycling is a vital biogeochemical process in the sulfur-rich mangrove ecosystem. It is critical to evaluate the potential impact of sulfur transformation in mangrove ecosystems. ... 2017), mining (Wang et al., 2016), paper manufacturing, refining, food processing, ... Since S. apetala introduced to China in …
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— U.S. elemental sulfur production was 8.7 million tons in 2009, with an additional 800,000 tons contained in byproduct sulfuric acid from nonferrous metal smelters. The United States, Canada, China, Russia, Japan, Saudi Arabia and Kazakhstan were the top sulfur producers. U.S. sulfur consumption was 10.1 million tons in 2009.
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— Lakes play important roles in biogeochemical cycles due to their capability of disposing of nutrients during long-term hydraulic residence times (Liao et al., 2021).Nitrogen (N) and sulfur (S) are two key elements that strongly linked to result in aquatic pollution (Zhang et al., 2022b).For example, an excessive N and S due to anthropogenic activities …
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Two identical plexiglass columns (A and B, inner diameter of 10 cm and height of 55 cm) were employed as the anaerobic up-flow biofilters. Column A was packed with elemental sulfur particles (2–––5 mm) from a chemical plant in Fujian, China, while column B was filled with commercial material, consisting primarily of elemental sulfur with a minor …
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