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Introduction Coal gangue is a kind of solid waste which is associated with coal in the coal formation process It is also a kind of black gray rock with low carbon content and harder than coal Coal gangue is the industrial solid waste with the largest discharge volume resulting in such problems as land occupation environmental pollution
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the accumulated coal gangue fig 1 a not only occupies land affects the atmospheric environment and damages groundwater resources but is also a potential source of landslides debris flows and spontaneous combustion li et al 2024 ma et al 2024 mjonono et al 2024 wu et al 2024 which restricts development around coal mines …
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： Coal gangue piles accumulate outside mines and can persist for years negatively impacting the regional environment To determine the main cause of soil pollution at coal gangues several coal gangues in Guizhou Province China that had undergone natural recovery via native plants for 8years were investigated in summer 2024
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The spontaneous combustion of coal gangue dumps after reclamation causes severe harm to the ecological environment surrounding mining areas Using remote sensing technology to determine vegetation heat stress levels is an important way to evaluate the probability of a spontaneous combustion disaster The canopy spectra and chlorophyll fluorescence ChlF parameters of alfalfa were collected
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Environmental pollution caused by coal gangue has been a significant challenge for sustainable development thus many coal gangue reduction approaches have been proposed in recent years In particular coal gangue facility CGF construction has been considered as an efficient method for the control and recycling of coal gangue
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The invention discloses a method for realizing in situ control of coal gangue pollution through organic river system coverage The method comprises the following steps a performing stocking area selection and anti seepage treatment wherein the selected hollows pits or other stacking areas have natural anti seepage requirements or are subjected to artificial anti seepage treatment so that
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China is rich in coal resources which account for more than 70% of its energy production and consumption Meanwhile a large amount of coal gangue is generated by the production process every ton of raw coal mined produces 150 250 kg of coal gangue About 4 billion tons of coal gangue has been stored in China over time [1 2] At
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heavy metal ion such as copper lead zinc chromium cadmium and nickel is a typical water pollution source [1 2] heavy metals will be enriched in organisms because they do not be eliminated by heavy metals pollution is of great treatment techniques of heavy metal wastewater can be divided into the chemical …
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open air coal gangue piles release heavy metals via leaching weathering and leakage diffusing recently heavy metal pollution in the soil around coal gangues has been widely studied
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production of coal mine and it takes the largest amount of industrial residue of solid waste [1] Environmental pollution caused by coal gangue has become more and more serious because of such discharging and large stockpiling There are economic and environmental benefits in using coal gangue aggregate in concrete [2 3]
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The Energy Information Administration estimates as of October 2024 that in 2024 CO 2 emissions from burning coal for energy accounted for about 20% of total energy related CO 2 emissions and for nearly 60% of total CO 2 emissions from the electric power sector In the past fly ash was released into the air through the smokestack
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After years of coal mining the accumulative deposit amount of coal gangue has reached billion tons only in China and that still keeps growing with a speed of billion tons a year Yun et al 2024 It not only takes up a lot of land but also pollutes the air and water in some extreme weather conditions Liu et al 2024
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a Other fuels mainly include coke coal gangue heat industrial and municipal wastes Cement process and fossil fuel combustion emissions are defined as direct emissions from cement industry and emissions from external production of electricity consumed by cement production are referred as indirect emissions CSI 2024
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Coal gangue is an inevitable product in coal mining and processing and is the most important source of pollution in mines Vegetation restoration of coal gangue piles must consider its special site conditions Therefore we conducted unmanned air vehicle UAV temperature monitoring field investigation and experimental analysis on spontaneous combustion coal gangue piles in Lu rsquo an mining
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Recently waste coal fly ash has been reported as a recycled material that can be reused for removal of pollutants but it needs modification to enhance the adsorption efficiency Hussain et al 2024 whereas adsorption is considered a cheaper and very simple method Song et al 2024 Maleki et al 2024
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The invention discloses a preparation method of sulfhydryl coal gangue and its application in soil remediation belonging to the technical field of material modification and remediation of soil heavy metal pollution The invention mainly grafts 3 mercaptopropyl trimethoxysilane onto the surface of coal gangue so that the surface of coal gangue
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The paper is based on data collection and field investigation in china and discusses the harm of coal gangue from different angles especially the harm of gangue spontaneous combustion
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1 Introduction Coal gangue is a solid waste generated during coal mining It not only occupies large areas of land but also causes significant amounts of pollution which can seriously affect human health [1 3] Therefore proper disposing of coal gangue has become a major concern
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Coal gangue is one of the largest industrial residues It has high ash content low carbonaceous content and heating value Meanwhile it has some trace elements Large quantities of coal gangue cause serious environmental problems by polluting the air water and soil as well as occupying a tremendous amount of land
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In coal production the raw coal contains a large amount of gangue which affects the quality of coal and pollutes the environment Separating coal and gangue can improve coal quality save energy and reduce consumption and make rational use of resources The separated gangue can also be reused
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Therefore the problems of water pollution and solid waste disposal have affected the sustainable development of economy and society and there is an urgent need to solve these problems through developing economical simple and effective materials or methods [email protected] heterogeneous composite from Coal Gangue waste as eco friendly
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Our products X ray Manganese Sorting Machine uses working principles of using the X ray transmittance imaging detection technology according to the unique physical characteristics of different ores and combined with high performance computing and big data technology the information of the ore is recorded one by one to achieve the purpose of effective selecting
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Explanatory Notes on Main Statistical Indicators Total Water Resources refers to total volume of water resources measured as run off for surface water from rainfall and recharge for groundwater in a given area excluding transit Surface Water Resources refers to total renewable resources which exist in rivers lakes glaciers and other collectors from rainfall and are measured as run
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In addition to containing a large number of major elements including C Si Al Fe Ca and Mg coal gangue also contains a variety of trace heavy metal elements Under long term weathering and rain leaching these heavy metal elements cause pollution in the groundwater surface water and soil
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Long time stacking of coal gangue will pollute the environment and occupy a large amount of land resulting in a waste of resources [ 27 28 ] Relevant studies show that coal gangue can be used as road building materials and soil improvement materials [ 29 ]
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Abstract The efficient separation of coal and gangue in the mining process is of great significance for improving coal mining efficiency and reducing environmental pollution Automatic detection of coal and gangue is the key and foundation for the separation of coal and gangue
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The results showed that firstly the concentrations of Hg were mg kg −1 to mg kg −1 in the research field and the concentrations of Hg in 97% of the soil samples exceeded the background value of the soil Secondly the average concentration of Hg was higher than the risk screening standard value in China
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Gangue stockpiles occupy large land areas and also pollute the atmosphere water and soil and even endanger human health [ 12 13 ] A large amount of technology development has been invested in the utilization of gangue but the utilization rate is less than 15% [ 11 ]
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Ankur s Ultra Clean Coal Gasification Technology and benefits Systems need no steam and are in negative pressure This ensures that there are no pressure related issues or
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