549 results match your criteria black coal


Deposition records of polycyclic aromatic hydrocarbons and black carbon in peat core from Dajiuhu, Shennongjia, Central China: human activity imprint since the industrial revolution.

Environ Sci Pollut Res Int 2021 May 28. Epub 2021 May 28.

State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, Wuhan, 430078, China.

Polycyclic aromatic hydrocarbons (PAHs) are a kind of organic pollutants with carcinogenic, teratogenic, and mutagenic effects. This study aims to assess the effects of changes in China's socio-economic indicators represented by energy consumption and number of motor vehicles, on PAHs and black carbon (BC) deposition. For this, a 50-cm peat core from Dajiuhu peatland, Central China, was collected and divided into 50 subsamples to establish a sedimentary record of about 200 years with radioactive Pb. Read More

View Article and Full-Text PDF

Characterization of Mental Illness Among US Coal Miners.

JAMA Netw Open 2021 May 3;4(5):e2111110. Epub 2021 May 3.

Black Lung Clinic Program, Stone Mountain Health Services, St Charles, Virginia.

View Article and Full-Text PDF

Heat-related mortality under climate change and the impact of adaptation through air conditioning: A case study from Thessaloniki, Greece.

Environ Res 2021 Aug 17;199:111285. Epub 2021 May 17.

Department of Forestry and Management of the Environment and Natural Resources, Democritus University of Thrace, Orestiada, Greece. Electronic address:

Climate change is expected to increase heat-related mortality across the world. Health Impact Assessment (HIA) studies are used to quantify the impact of higher temperatures, taking into account the effect of population adaptation. Although air-conditioning (AC) is one of the main drivers of technological adaptation to heat, the health impacts associated with AC-induced air pollution have not been examined in detail. Read More

View Article and Full-Text PDF

Emission reduction of black carbon and polycyclic aromatic hydrocarbons during COVID-19 pandemic lockdown.

Air Qual Atmos Health 2021 May 10:1-15. Epub 2021 May 10.

Department of Chemistry, National Institute of Technology, Jamshedpur, Jharkhand 831014 India.

The global pandemic COVID-19 necessitated various responses throughout the world, including social distancing, use of mask, and complete lockdown. While these measures helped prevent the community spread of the virus, the resulting environmental benefits of lockdown remained mostly unnoticed. While many studies documented improvements in air quality index, very few have explored the reduction in black carbon (BC) aerosols and polycyclic aromatic hydrocarbons (PAHs) concentrations due to lockdown. Read More

View Article and Full-Text PDF

Dual-potential electrochemiluminescence of single luminophore for detection of biomarker based on black phosphorus quantum dots as co-reactant.

Mikrochim Acta 2021 May 5;188(6):181. Epub 2021 May 5.

School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Coal Clean Conversion and High Valued Utilization, Institute of Material Science and Engineering, Anhui University of Technology, Maanshan, 243002, China.

Simultaneous cathodic and anodic electrochemiluminescence (ECL) emissions of needle-like nanostructures of Ru(bpy) (RuNDs) as the only luminophore are reported based on different co-reactants. Cathodic ECL was attained from RuNDs/KSO system, while anodic ECL was achieved from RuNDs/black phosphorus quantum dots (BPQDs) system. Ferrocene attached to the hairpin DNA could quench the cathodic and anodic ECL simultaneously. Read More

View Article and Full-Text PDF

Impact of Fly Ashes from Combustion in Fluidized Bed Boilers and Siliceous Fly Ashes on Durability of Mortars Exposed to Seawater and Carbonation Process.

Materials (Basel) 2021 Apr 30;14(9). Epub 2021 Apr 30.

Faculty of Civil Engineering and Architecture, Opole University of Technology, 45-758 Opole, Poland.

This article presents test results of aggressive environment impact, i.e., seawater, acid solutions and carbonation, on the durability of cement-ash mortars. Read More

View Article and Full-Text PDF

Evaluation of black carbon source apportionment based on one year's daily observations in Beijing.

Sci Total Environ 2021 Jun 6;773:145668. Epub 2021 Feb 6.

Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami 33149, USA.

Combustion-derived black carbon (BC) is increasingly recognized as a significant pollutant that can have adverse effects on the atmospheric environment, human health, and regional climate. Fossil fuel combustion is the main source of BC, yet understanding of the relative contributions to BC from coal and liquid fuel combustion remains incomplete. Moreover, few studies have assessed the relative contributions based on long-term continuous daily field observations. Read More

View Article and Full-Text PDF

Synergistic utilization of diverse industrial wastes for reutilization in steel production and their geopolymerization potential.

Waste Manag 2021 May 18;126:728-736. Epub 2021 Apr 18.

Trenchless Technology Center (TTC), Louisiana Tech University, Ruston, LA 71272, USA.

Recycling wastes back into a manufacturing process, or into a separate product, is an important challenge. The primary aim of this work was to combine wastes from the steel industry, the galvanizing industry and the pulp and paper industry to form two new useful products. The steel industry generates the wastes red dust, mill scale, blast oxygen furnace slag and iron ore fines. Read More

View Article and Full-Text PDF

Variation in chemical composition and sources of PM during the COVID-19 lockdown in Delhi.

Environ Int 2021 08 9;153:106541. Epub 2021 Apr 9.

Department of Civil Engineering, Indian Institute of Technology Kanpur, Uttar Pradesh, India. Electronic address:

The Government of India (GOI) announced a nationwide lockdown starting 25th March 2020 to contain the spread of COVID-19, leading to an unprecedented decline in anthropogenic activities and, in turn, improvements in ambient air quality. This is the first study to focus on highly time-resolved chemical speciation and source apportionment of PM to assess the impact of the lockdown and subsequent relaxations on the sources of ambient PM in Delhi, India. The elemental, organic, and black carbon fractions of PM were measured at the IIT Delhi campus from February 2020 to May 2020. Read More

View Article and Full-Text PDF

Association Between Financial Conflicts of Interest and ILO Classifications for Black Lung Disease.

Ann Am Thorac Soc 2021 Mar 29. Epub 2021 Mar 29.

University of Illinois at Chicago, Environmental and Occupational Health Sciences, Chicago, Illinois, United States.

Rationale: The US Department of Labor administers the Federal Black Lung Program (FBLP), an administrative system charged with managing claims by coal miners for workers' compensation for totally disabling coal mine dust lung disease. Specific case reports have raised concern that financial conflicts of interest (COI) may systematically bias physicians when they are classifying chest x-rays (CXRs) for the absence, presence and severity of pneumoconiosis.

Objective: To evaluate the direction and magnitude of association between financial COI of physicians participating in the FBLP and international standards for the classification of radiographs of pneumoconiosis. Read More

View Article and Full-Text PDF

Resource and environmental assessment of pyrolysis-based high-value utilization of waste passenger tires.

Waste Manag 2021 May 24;126:201-208. Epub 2021 Mar 24.

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address:

Carbon black and fuel oil as the products of conventional pyrolysis are limited in application owing to their low quality. This paper presents a pyrolysis-based high-value utilization process of waste passenger tires (WPTs). A comparison of the life cycle assessment (LCA) between this process and a conventional pyrolysis process was carried out. Read More

View Article and Full-Text PDF

Early radiographic pneumoconiosis is associated with impaired exercise gas exchange among coal miners with normal resting spirometry.

Am J Ind Med 2021 Jun 25;64(6):453-461. Epub 2021 Mar 25.

Environmental and Occupational Health Sciences, School of Public Health, University of Illinois at Chicago, Chicago, Illinois, USA.

Rationale: We sought to determine if radiographic pneumoconiosis predicts abnormal gas exchange during exercise in coal mine workers with preserved resting lung function.

Methods: We analyzed data from former coal miners seen between 2006 and 2014 in a single clinic specializing in black lung evaluations. We limited the analysis to those with normal resting spirometry and an A-a gradient at peak exercise ≥10 mmHg. Read More

View Article and Full-Text PDF

Light absorption of black carbon and brown carbon in winter in North China Plain: comparisons between urban and rural sites.

Sci Total Environ 2021 May 27;770:144821. Epub 2021 Jan 27.

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address:

The light absorption black carbon (BC) and brown carbon (BrC) are two important sources of uncertainties in radiative forcing estimate. Here we investigated the light absorption enhancement (E) of BC due to coated materials at an urban (Beijing) and a rural site (Gucheng) in North China Plain (NCP) in winter 2019 by using a photoacoustic extinctiometer coupled with a thermodenuder. Our results showed that the average (±1σ) E was 1. Read More

View Article and Full-Text PDF

Tracing Riverine Particulate Black Carbon Sources in Xijiang River Basin: Insight from Stable Isotopic Composition and Bayesian Mixing Model.

Water Res 2021 Apr 14;194:116932. Epub 2021 Feb 14.

Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China. Electronic address:

Rivers transport abundant terrestrial carbon into the ocean, constituting a fundamental channel between terrestrial carbon pools and oceanic carbon pools. The black carbon (BC) derived from biomass and fossil fuel combustion is an important component of the riverine organic carbon flux. A recent study estimated that approximately 17 ~ 37 Tg C of BC was delivered in suspended particle phase by rivers per year. Read More

View Article and Full-Text PDF

Variations and similarities in structural, chemical, and elemental properties on the ashes derived from the coal due to their combustion in open and controlled manner.

Environ Sci Pollut Res Int 2021 Feb 24. Epub 2021 Feb 24.

Institute of Environment and Development Studies, Bundelkhand University, Kanpur Road, Jhansi, 284128, India.

Coal fly ash (CFA) and coal-based incense sticks ash (ISA) have several similarities and differences due to the presence of coal as a common component in both of them. CFA are produced from the combustion of pulverized coal during electricity production in the thermal power plants while ISA are produced from the burning of incense sticks at religious places and at houses. A typical black colored Indian, incense sticks are mainly are comprised of coal powder or potassium nitrate, wood chip, fragrance, binder or binding agent, and bamboo sticks. Read More

View Article and Full-Text PDF
February 2021

The Impact of Black Lung and a Methodology for Controlling Respirable Dust.

Authors:
Jay F Colinet

Min Metall Explor 2020 ;37(6):1847-1856

Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA.

Coal workers' pneumoconiosis (CWP), commonly known as black lung, is caused by the inhalation of respirable coal mine dust and is a disabling and potentially fatal lung disease with no cure. Historically, CWP has taken a tremendous human and financial toll in the US coal mining industry. Recent health surveillance data indicates that CWP continues to occur at elevated levels. Read More

View Article and Full-Text PDF
January 2020

Characterizing patterns of small pneumoconiotic opacities on chest radiographs of New Mexico coal miners.

Arch Environ Occup Health 2021 Feb 15:1-5. Epub 2021 Feb 15.

Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.

Small pneumoconiotic opacities in coal miners are usually described as rounded, regular, and upper zone predominant. We aim to characterize chest radiographic patterns in New Mexico coal miners in comparison with other miners. Of the 330 chest radiographs reviewed, small pneumoconiotic opacities in New Mexico miners were almost always irregularly shaped, and lower lung zone predominant, consistent with diffuse dust-related pulmonary fibrosis. Read More

View Article and Full-Text PDF
February 2021

Binderless, All-Lignin Briquette from Black Liquor Waste: Isolation, Purification, and Characterization.

Molecules 2021 Jan 27;26(3). Epub 2021 Jan 27.

Material Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl.Ganesha 10, Bandung 40132, Indonesia.

Lignin isolated from black liquor waste was studied in this research to be utilized as binderless, all-lignin briquette, with a calorific value in the range of 5670-5876 kcal/kg. Isolation of lignin from black liquor was conducted using the acid precipitation method. Sulfuric acid, citric acid, and acetic acid were used to maintain the pH level, which varied from 5 to 2 for the precipitation process. Read More

View Article and Full-Text PDF
January 2021

COVID-19 lockdowns reduce the Black carbon and polycyclic aromatic hydrocarbons of the Asian atmosphere: source apportionment and health hazard evaluation.

Environ Dev Sustain 2021 Jan 3:1-20. Epub 2021 Jan 3.

Karunya Institute of Technology and Sciences, Coimbatore, 641114 Tamil Nadu India.

Abstract: The entire world is affected by Coronavirus disease (COVID-19), which is spreading worldwide in a short time. India is one of the countries which is affected most, therefore, the Government of India has implemented several lockdowns in the entire country from April 25, 2020. We studied air pollutants (i. Read More

View Article and Full-Text PDF
January 2021

Air pollutant variations in Suzhou during the 2019 novel coronavirus (COVID-19) lockdown of 2020: High time-resolution measurements of aerosol chemical compositions and source apportionment.

Environ Pollut 2021 Feb 21;271:116298. Epub 2020 Dec 21.

Suzhou Environmental Monitoring Center, Suzhou, 215000, China.

To control the spread of the 2019 novel coronavirus (COVID-19), China imposed rigorous restrictions, which resulted in great reductions in pollutant emissions. This study examines the characteristics of air pollutants, including PM (particles with aerodynamic diameters < 2.5 μm), gas pollutants, water-soluble ions (WSIs), black carbon (BC) and elements, as well as the source apportionment of PM in Suzhou before, during and after the Chinese New Year (CNY) holiday of 2020 (when China was under an unprecedented state of lockdown to restrict the COVID-19 outbreak). Read More

View Article and Full-Text PDF
February 2021

Filter-based absorption enhancement measurement for internally mixed black carbon particles over southern China.

Sci Total Environ 2021 Mar 13;762:144194. Epub 2020 Dec 13.

State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.

The effect of the mixing state of black carbon (BC) on light absorption is of enduring interest due to its close connection to regional/global climate. Herein, we present concurrent measurements of both BC absorption enhancement (E) and the chemical mixing state in southern China. E was obtained by simultaneous measuring the light absorption coefficient using an aethalometer before and after being heated. Read More

View Article and Full-Text PDF

Characterization of emissions from a pilot-scale combustor operating on coal blended with woody biomass.

Fuel (Lond) 2020 Mar;264

Jacobs Technology, Inc., 600 William Northern Blvd., Tullahoma, TN 37388, United States.

Emissions generated from the combustion of coal have been a subject of regulation by the United States Environmental Protection Agency (U.S. EPA) and State agencies for years, as they have been associated with adverse effects on human health and the environment. Read More

View Article and Full-Text PDF

Insight into the Adsorption of Methane on Gas Shales and the Induced Shale Swelling.

ACS Omega 2020 Dec 1;5(49):31508-31517. Epub 2020 Dec 1.

College of Petroleum Engineering, China University of Petroleum-Beijing, Beijing 102249, China.

Shale gas resources are highly abundant in the world. They can provide sustainable energy supply and have the potential to reduce energy prices. Therefore, shale gas has become one of the most important resources for oil and gas exploration and production, especially in North America today. Read More

View Article and Full-Text PDF
December 2020

Stone-built heritage as a proxy archive for long-term historical air quality: A study of weathering crusts on three generations of stone sculptures on Broad Street, Oxford.

Sci Total Environ 2021 Mar 3;759:143916. Epub 2020 Dec 3.

Oxford Resilient Buildings and Landscapes Laboratory (OxRBL), School of Geography and the Environment, University of Oxford, South Parks Road, Oxford OX1 3QY, UK. Electronic address:

Black crusts on historic buildings are mainly known for their aesthetic and deteriorative impacts, yet they also can advance air pollution research. Past air pollutants accumulate in distinct layers of weathering crusts. Recent studies have used these crusts to reconstruct pollution to improve our understanding of its effects on stone-built heritage. Read More

View Article and Full-Text PDF

Torrefaction behavior of hot-pressed pellets prepared from leucaena wood.

Bioresour Technol 2021 Feb 7;321:124502. Epub 2020 Dec 7.

The Joint Graduate School of Energy and Environment, Center of Excellence on Energy Technology and Environment, King Mongkut's University of Technology Thonburi, Bangmod, Tungkru, Bangkok 10140, Thailand. Electronic address:

In this study, torrefaction behavior of hot-pressed wood pellet prepared at 250 °C and compression pressure of 70 MPa was examined at temperature 260-300 °C. It was found that the torrefaction behavior of hot-pressed pellet (HP) was significantly different from that of Raw and cold-pressed pellet (CP). The mass yield and energy yield for torrefaction at 300 °C and 30 min holding time for HP were 54. Read More

View Article and Full-Text PDF
February 2021

Automated detection of pneumoconiosis with multilevel deep features learned from chest X-Ray radiographs.

Comput Biol Med 2021 Feb 21;129:104125. Epub 2020 Nov 21.

Quantitative Imaging, CSIRO Data61, Marsfield, Sydney, NSW, 2122, Australia. Electronic address:

Early detection of pneumoconiosis in X-Rays has been a challenging task that leads to high inter- and intra-reader variability. Motivated by the success of deep learning in general and medical image classification, this paper proposes an approach to automatically detect pneumoconiosis using a deep feature based binary classifier. The features are extracted from X-rays using deep transfer learning, comprising both low and high-level feature sets. Read More

View Article and Full-Text PDF
February 2021

Optically Measured Black and Particulate Brown Carbon Emission Factors from Real-World Residential Combustion Predominantly Affected by Fuel Differences.

Environ Sci Technol 2021 01 9;55(1):169-178. Epub 2020 Dec 9.

Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.

Residential solid fuel use is an important source of black carbon (BC) but also a main source of uncertainty in BC emission inventories, as reliable real-world emission factors (EFs) and data on consumption of noncommercial household fuels are limited. In this study, particulate BC and brown carbon (BrC) for real-world indoor coal and biomass burning were evaluated using a SootScan model OT21 optical transmissometer from a field campaign including 343 biomass/coal combustion events. The highest BC EF from the burning of coal cake (a mixed fuel locally made from coal and clay) was 1. Read More

View Article and Full-Text PDF
January 2021

Time-Resolved Selective Electrochemical Sensing of Carbon Particles.

Anal Chem 2021 01 8;93(2):761-768. Epub 2020 Dec 8.

Department of Chemistry, Oakland University, Rochester Hills, Michigan 48309, United States.

This work demonstrated a new method for electrochemical detection of carbon black particles based on impact electrochemistry that was capable of selective detection of carbon black from the insulating oxide particles. We systematically studied the electrochemical collision events with carbon black particle suspension solution (pH 7.0 phosphate buffer) at varying carbon black concentrations using a convective condition and a gold microelectrode. Read More

View Article and Full-Text PDF
January 2021

Fingerprinting characterization of sedimentary PAHs and black carbon in the East China Sea using carbon and hydrogen isotopes.

Environ Pollut 2020 Dec 8;267:115415. Epub 2020 Sep 8.

School of Ocean Sciences, China University of Geosciences, Beijing, 100083, China.

In this study, we present the application of a dual-isotope approach for the source apportionment of polycyclic aromatic hydrocarbons (PAHs) and black carbon (BC) in the East China Sea (ECS). The δC and δH isotope signatures of the PAHs were determined from surface sediments collected from the ECS. A Bayesian Markov chain Monte Carlo (MCMC) model was used to the environmental source identifications with dual-isotope PAHs data. Read More

View Article and Full-Text PDF
December 2020

Spatial distribution of soil bulk density and its relationship with slope and vegetation allocation model in rehabilitation of dumping site in loess open-pit mine area.

Environ Monit Assess 2020 Oct 31;192(11):740. Epub 2020 Oct 31.

School of Land Science and Technology, China University of Geosciences, Beijing, 100083, China.

Studies of soil bulk density (BD) spatial variations of land reclaimed after mining have become a focus of land reclamation and ecological restoration research. However, there have been few studies on the relationship among the reconstructed BD, terrain conditions, and vegetation growth. We examined the southern dumping site of the Pingshuo Antaibao open-pit coal mine located in a loess area in China. Read More

View Article and Full-Text PDF
October 2020