Insights into the weathering behavior of pyrite in alkaline soil through electrochemical characterizations: Actual hazards or potentially benefits?

Feng, Xiaonan; Chen, Zhijie; Wang, Shuai; Cen, Ling; Ni, Bing‐Jie; Liu, Qingyou

doi:10.1016/j.jhazmat.2023.131145

Cited by 9 publications

(2 citation statements)

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“…Compared to the raw coal, the residual coal remained unchanged in mineral composition, but the relative content (partially reflected by the intensity of peaks) of certain minerals changed. Pyrite, a common metallic sulfide mineral containing various heavy metals [36], could be effectively reduced through the leaching action of M-3. M (moisture), A (ash), V (volatiles) FC (fixed carbon) ad (air-dried basis), and daf (dry and ash-free basis).…”

Section: Proximate Ultimate and Xrd Analysis Before And After Bioleac...mentioning

confidence: 99%

“…Compared to the raw coal, the residual coal remained unchanged in mineral composition, but the relative content (partially reflected by the intensity of peaks) of certain minerals changed. Pyrite, a common metallic sulfide mineral containing various heavy metals [36], could be effectively reduced through the leaching action of M-3. The X-ray diffraction (XRD) peaks were analyzed using Origin 9.1 software, and the corresponding structural parameters of the coal micro-molecular structure are presented in Table 2.…”

Section: Proximate Ultimate and Xrd Analysis Before And After Bioleac...mentioning

confidence: 99%

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Bioleaching Mercury from Coal with Aspergillus flavus M-3

Mao,

Mei,

et al. 2023

Microorganisms

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This study focuses on the utilization of Aspergillus flavus(M-3) for the bioleaching mercury from coal, offering an alternative and environmentally to its clean utilization. The fungus was isolated from the soil near a high mercury coal mine in Lao Ying Shan (LYS), Guizhou. Utilizing direct mercury analysis, X-ray diffraction (XRD), and Fourier Transform-Infrared (FT-IR) analysis techniques, the transformation of mercury speciation, mineral components, and organic groups in the coal were analyzed before and after the bioleaching process. The findings of the study illustrated that the fungus M-3 exhibited a remarkable capacity for coal bioliquefaction and mercury leaching from LYS coal. Following a 15-day bioleaching process, a remarkable mercury leaching rate of 83.79% was achieved. Various forms of mercury speciation, including residue, organic matter, sulfide-bound, oxide-bound, exchangeable, and carbonate-bound forms, were released from the coal, with leaching rates ranging from 80.41% to 92.60%. XRD analysis indicated that the M-3 strain facilitated the dissolution of coal pyrite and the degradation of macromolecules, effectively loosening the coal structure. FT-IR analysis of raw and residual coal demonstrated the breakdown of the aromatic ring structure and introduced oxygen-containing functional groups by M-3. Overall, this study highlights the efficacy of bioliquefying coal using Aspergillus flavus (M-3) as a method for clean coal utilization while simultaneously bioleaching mercury.

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Section: Proximate Ultimate and Xrd Analysis Before And After Bioleac...mentioning

confidence: 99%

“…Compared to the raw coal, the residual coal remained unchanged in mineral composition, but the relative content (partially reflected by the intensity of peaks) of certain minerals changed. Pyrite, a common metallic sulfide mineral containing various heavy metals [36], could be effectively reduced through the leaching action of M-3. The X-ray diffraction (XRD) peaks were analyzed using Origin 9.1 software, and the corresponding structural parameters of the coal micro-molecular structure are presented in Table 2.…”

Section: Proximate Ultimate and Xrd Analysis Before And After Bioleac...mentioning

confidence: 99%