Size Distribution of Atmospheric Particulates and Pb Concentrations in TSP During the Cold-Weather Heating Period

Liu, Yuyan; Cheng, Liu; Shen, Yaxing; Tian, Fengzhan; Liu, Haofeng; Shi, Fengshan

doi:10.15244/pjoes/60886

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…The study [32] demonstrated the effect of combustion on the emission of lead into the atmosphere through dust. The concentration of Pb in the TSP increased 1.5 times during the heating season.…”

Section: Introductionmentioning

confidence: 93%

Investigations of the effectiveness of lead disposal from hard coal through the cleaning process

et al. 2016

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Abstract. Lead, belonging to the category of toxic heavy metals, poses a major threat to the environment and the health and life of living organisms. Anthropogenic sources of lead emissions to the atmosphere include coal combustion, pyrolysis and gasification processes. This metal enters the atmosphere through the fly ashes and gases, causing chemical imbalance in the ecosystem. One way of reducing the emissions of heavy metals into the atmosphere due to the thermochemical processing of coal involves removing impurities from the fuel prior to its use, e.g. through the coal cleaning processes. The removal of heavy metals from coal through these processes is possible due to the fact that these elements are mostly related to the mineral matter, which is separated from the organic matter. This paper presents the results of investigations of the removal efficiency of lead from coals through the coal cleaning processes in industrial plants. Additionally, the distribution of lead among individual products of these processes was identified. Raw coals, coal concentrates, intermediate products and waste from five plants of mechanical processing of coking coal were analyzed. The determination of the lead content was performed with the use of Flame Atomic Absorption Spectrometry (FAAS). Moreover, for all the samples, a proximate analysis and ultimate analysis as well as the determination of the content of main elements of mineral matter were conducted. In order to confirm the mode of occurrence of lead in coal mineral matter, an elemental analysis was conducted with the use of an electron microprobe. The results of the investigations showed that with a significant reduction of mineral matter in the coal cleaning processes, the lead content is decreased, as a result of both, the application of the gravity and flotation methods. The analyzed metal accumulates primarily in the waste and/or intermediate products of coal cleaning. The lead content in the obtained coal concentrates does not exceed 25 mg/kg. The microprobe examinations confirmed the presence of lead in sulphides, mainly in the form of galena.

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Section: Introductionmentioning

confidence: 93%

Investigations of the effectiveness of lead disposal from hard coal through the cleaning process

et al. 2016

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“…The principle of aerodynamics shows that the cloudfog particles can catch the respirable dust of similar particle size more effectively [10][11][12]. Some works have revealed the importance of spray characteristics to the typical water-based dust reduction by studying the influences from different spray media [13][14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Water Spraying Distribution by Multi-points Characterization System in Simulation Tunnel

Lu¹,

Ouyang²,

Zhu³

2022

Pol. J. Environ. Stud.

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Water spraying is widely used in dust reduction of coal mines. A set of dust governance system urgently requires spray effects and its characteristics. A spray distribution characterization system is invented in this study. With CFD calculation results, the spray droplet size and concentration are measured by this characterization system at speed 0.5, 1, 1.5 and 2 m/s in a simulation tunnel. The results demonstrate that the droplet size reaches 5.416 μm through particle collision and evaporation. From 5 m to 30 m, the spray concentration decreases to the fluctuation valley at 15 m and picks up again, whereas the condition varies at the speed of 0.5 m/s. This study provides additional insights for spray characterization and supports the spray dust reduction.

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Fraction distribution of arsenic in different-sized atmospheric particulate matters

Xie

Yuan

Xie

et al. 2019

Environ Sci Pollut Res

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Size Distribution of Atmospheric Particulates and Pb Concentrations in TSP During the Cold-Weather Heating Period

Cited by 5 publications

References 16 publications

Investigations of the effectiveness of lead disposal from hard coal through the cleaning process

Investigations of the effectiveness of lead disposal from hard coal through the cleaning process

Investigation of Water Spraying Distribution by Multi-points Characterization System in Simulation Tunnel

Fraction distribution of arsenic in different-sized atmospheric particulate matters

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