Changes and Distribution of Modes of Occurrence of Seventeen Potentially-Hazardous Trace Elements during Entrained Flow Gasification of Coals from Ningdong, China

Tang, Yuegang; Guo, Xin; Pan, Xiaoyi; Finkelman, Robert B.; Wang, Yafeng; Huan, Binbin; Wang, Shaoqing

doi:10.3390/min8050202

Cited by 20 publications

(4 citation statements)

References 87 publications

(186 reference statements)

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“…This study is based on China Ningdong coal gasification coarse slag (CGCS) [3,15,16]. We hope to find a feasible way for the utilization of CGCS with the increasingly severe environmental pressure.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Zhang

Zhao

et al. 2020

Applied Sciences

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In view of the current and urgent environmental protection needs, the use of industrial solid waste in China’s Ningdong is becoming more and more important. In this paper, NaP zeolite with good physical properties is synthesized by using coal gasification coarse slag (CGCS) as the raw material, without the addition of a silicon and aluminum source, without the addition of a template agent, and without high-temperature calcination. Add a small amount of NaOH and deionized water to the CGCS to adjust the molar ratio to SiO2:Al2O3:Na2O:H2O = 5.2:1.0:5.0:100. The effects of aging time, crystallization temperature, and crystallization time parameters on synthetic zeolite were studied. The raw materials and the obtained zeolite were tested by XRF, XRD, SEM, FT-IR, TG-DSC, BET, and other technologies. The results show that the specific surface area of the synthesized NaP zeolite can reach 161.06 m2/g, which has the characteristics of large specific surface area, regular morphology, and high crystallinity. We obtained NaP zeolite through a simple and low-cost synthesis method. The synthesized NaP zeolite was used to simulate the removal of ammonia nitrogen in wastewater, and the optimal removal rate was 92.67%. Among them, Na+ plays an important role in the synthesis of NaP zeolite and ion exchange with NH4+. Our research provides new ideas for solving the large-scale accumulation of CGCS and treating ammonia nitrogen in industrial wastewater. Thus, it is a promising green environmental protection and “treating waste by waste” route.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Zhang

Zhao

et al. 2020

Applied Sciences

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“…Manganese is a low volatile element. However, volatilization may happen, especially in coal combustion (Dıaz-Somoano and Martinez-Tarazona 2003;Tang et al 2018). According to this framework, the five elements chosen to be discussed in this study show different volatility.…”

Section: Discussionmentioning

confidence: 99%

Monitoring air pollution close to a cement plant and in a multi-source industrial area through tree-ring analysis

Cocozza

Alterio

Guillong

et al. 2021

Environ Sci Pollut Res

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Thirty-two trace elements were examined in the tree rings of downy oak to evaluate the pollution levels close to a cement plant isolated in a rural context and an industrial area where multiple sources of air pollution are or were present. Tree cores were collected from trees growing 1 km from both the cement plant and the industrial area that are located 8 km from each other. The analysis of the trace elements was performed on annual tree rings from 1990 to 2016 using laser ablation inductively coupled plasma mass spectrometry. Trace elements Cs, Mg, Mn, S and Zn reflected the emission history of the cement plant. Their values have increased since early 2000s, when the cement plant started its activity. However, the lack of significant trends of pollutants in the tree rings from the industrial area and the possible effect of translocation and volatility of some elements left open questions. The very weak changes of the other trace elements in the period 1990–2016 suggest those elements do not mark any additional effect of the industrial activity on the background pollution. The results confirm that downy oak trees growing close to isolated industrial plants must be considered a pollution forest archive accessible through dendrochemistry.

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“…Coal gasification technologies are widely used around the world to produce clean coal for the upstream products. 10 However, due to the production of coal gasification plants, a quantity of coal gasification fine slag (CGFS) is produced as a byproduct. The high carbon content (30−60%) of CGFS makes it difficult to recycle as a construction material.…”

Section: Introductionmentioning

confidence: 99%

Acid-Alkali Deep Deashing and Alkali Activation of Coal Gasification Fine Slag for Supercapacitive Electrode Application

Zhang,

Xiong,

Cheng

et al. 2024

ACS Appl. Electron. Mater.

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Nowadays, coal gasification fine slag (CGFS) generated during the coal gasification process has become difficult to treat bulk solid waste. CGFS contains high levels of residual carbon, which is difficult to recycle due to the tight binding of minerals with residual. In our study, the carbon source of active carbon (P-AC) was obtained by the molten-caustic leaching (MCL) method, in which alkaline leaching solution can be further used as a ceramic precursor. Subsequently, the KOH activation method was used to prepare the activated carbon (AC) electrode materials. The deashing conditions and activation parameters were optimized carefully. The results indicate that the AC-800 electrode material exhibits excellent specific capacitance and cycle stability; the main reason for good performance is the hierarchical porous structure of AC-800 that not only provides the path for ion diffusion but also strengthens the fluidity of electrolyte inside the material. This paper offers an effective method to enhance the added value of CGFS by a fluoride-free ash removal process.

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Changes and Distribution of Modes of Occurrence of Seventeen Potentially-Hazardous Trace Elements during Entrained Flow Gasification of Coals from Ningdong, China

Abstract: In order to reveal the migration of trace elements from coal to gasification residues, the modes of occurrence of potentially-hazardous trace elements (Be,

Cited by 20 publications

References 87 publications

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Monitoring air pollution close to a cement plant and in a multi-source industrial area through tree-ring analysis

Acid-Alkali Deep Deashing and Alkali Activation of Coal Gasification Fine Slag for Supercapacitive Electrode Application

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