Arsenic in Chinese coals: Distribution, modes of occurrence, and environmental effects

Kang, Yu; Liu, Guijian; Chou, Chen‐Lin; Wong, Ming Hung; Zheng, Lu; Ding, Rui

doi:10.1016/j.scitotenv.2011.10.026

Cited by 139 publications

(58 citation statements)

References 74 publications

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“…As shown in Figure 5 and the HNO 3 -leachable arsenic accounts for 77%. This indicates the dominant association of arsenic with pyrite, which is consistent with previous reports (Finkelman, 1994;Huggins et al 2009;Kang et al, 2011;Zheng, Liu, and Chou, 2008;Zhou et al, 2014). The results of selective leaching on the predominant carrier of arsenic are different from the correlation analysis, because the pyrite is predominantly embedded in clay (Figure 3).…”

supporting

confidence: 91%

Modes of arsenic occurance in coal slime and its removal: a case study at the Tanggongta Plant in Inner Mongolia, China

Zhou

Cong

Liu

et al. 2017

J. South. Afr. Inst. Min. Metall.

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The modes of occurrence of arsenic and the effects of low-intensity leaching-flotation on arsenic removal from coal slime from the Tanggongta Plant, Inner Mongolia, China were investigated. The coal slime was examined using hydride generation inductively coupled plasma optical emission spectrometry and X-ray diffraction to obtain the content of elements and the major minerals. The modes of occurrence of arsenic in minerals were determined using selective leaching, float-and-sink analysis, and polarized light microscopy. The results indicate that pyrite is the dominant carrier of arsenic in the coal slime, which predominantly exists in association with clay. Significant proportion of the arsenic is removed by a low-intensity leaching-flotation process, consistent with the data from selective leaching and flotation of gangue. The results show that low intensity leaching-alkali washing-flotation is more efficient than direct flotation and low-intensity leaching-flotation. arsenic removal, coal slime, low-intensity leaching, flotation.

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supporting

confidence: 91%

Modes of arsenic occurance in coal slime and its removal: a case study at the Tanggongta Plant in Inner Mongolia, China

Zhou

Cong

Liu

et al. 2017

J. South. Afr. Inst. Min. Metall.

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“…5). High levels of elements from anthropogenic sources are generally emitted by coal combustion (Duzgoren-Aydin, 2007;Kang et al, 2011;Tian et al, 2010), and part of this group of elements (Pb and Cu) are also commonly used as ceramic flux to lower the high melting point of silica. Peng et al (2007) found that the concentrations of Pb were 2870 ng/m 3 in the flue gases of ceramic manufacturing in Foshan, and similar values were observed in Spain (Minguillón et al, 2009).…”

Section: Temporal Trend Of Inorganic Elementsmentioning

confidence: 99%

Long-term trends of chemical characteristics and sources of fine particle in Foshan City, Pearl River Delta: 2008–2014

Tan

Duan

et al. 2016

Science of The Total Environment

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“…The content of sulfur in coal gangue is quite close to the content of sulfur in coal (1.02 wt.%) by Luo et al (2005). What's more, the contents of arsenic and fluoride in coal gangue are higher than those in coal, which are estimated at 4.5 mg/kg (Luo, 2005), and 3.18 mg/kg (Kang et al, 2011) for arsenic; and 82 mg/ kg (Luo et al, 2004a), and 130 mg/kg for fluoride in Chinese coal, respectively. In addition, the contents of mercury in coal gangue are close to these in Chinese coal which is estimated at 0.15 mg/kg (Huang and Yang, 2002) and 0.188 mg/kg .…”

Section: Average Contents Of Sulfur Arsenic Mercury and Fluoride Frmentioning

confidence: 96%

Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories

Wang

Luo

Wang

et al. 2016

Environmental Pollution

158

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a b s t r a c tA rough estimate of the annual amount of sulfur, arsenic, mercury and fluoride emission from spontaneous combustion of coal gangue in China was determined. The weighted mean concentrations of S, As, Hg, and F in coal gangue are 1.01%, 7.98, 0.18, and 365.54 mg/kg, respectively. Amounts of S, As, Hg, and F emissions from coal gangue spontaneous combustion show approximately 1.13 Mt, and 246, 45, and 63,298 tons in 2013, respectively. The atmospheric release amount of sulfur from coal gangue is more than one tenth of this from coal combustion, and the amounts of As, Hg, and F are close to or even exceed those from coal combustion. China's coal gangue production growth from 1992 to 2013 show an obvious growth since 2002. It may indicate that Chinese coal gangue has become a potential source of air pollution, which should be included in emission inventories.

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Arsenic in Chinese coals: Distribution, modes of occurrence, and environmental effects

Cited by 139 publications

References 74 publications

Modes of arsenic occurance in coal slime and its removal: a case study at the Tanggongta Plant in Inner Mongolia, China

Modes of arsenic occurance in coal slime and its removal: a case study at the Tanggongta Plant in Inner Mongolia, China

Long-term trends of chemical characteristics and sources of fine particle in Foshan City, Pearl River Delta: 2008–2014

Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories

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