Leaching Characteristics of Trace Elements in Desulfurization Gypsum from a Coal-Fired Power Plant

Liu, Y. K.; Zhuo, Yuqun; Zhu, Zhenwu; Chen, C. H.

doi:10.1007/978-3-642-30445-3_53

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…DTC, also For the raw gypsum, the Cu leaching concentration kept increasing with the increasing pH; the Zn, Ni, Cr, Cd, and Pb leaching concentrations showed a decreasing trend, while the As and Hg leaching concentrations were not affected much. In a related study, Liu et al The authors of [27] investigated the environmental stability of trace elements in desulfurization gypsum via TCLP leaching experiments and the BCR step-by-step extraction method, and the six trace elements studied included As, Se, Cd, Cr, Pb, and Hg. The leaching experiments showed that the leaching rates of the trace elements in the FGD gypsum increased with the decreasing pH value in the studied range, and they were more easily leached into an acidic environment.…”

Section: Effect Of Ph On Environmental Release Of Heavy Metals From G...mentioning

confidence: 99%

Solidification and Release Characteristics of Heavy Metals in Gypsum from Coal-Fired Power Plants

Wang,

Wei,

Zhao

et al. 2024

Energies

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Heavy metals in flue gas desulfurization (FGD) gypsum from coal-fired power plants are at risk of releaching during the processes of stockpiling and resource utilization. In this study, the effects of organosulfur chelators dithiocarbamate (DTC) and trisodium trithiocyanate-15 (TMT-15) on the solidification characteristics of heavy metals in desulphurized gypsum under different mass fractions, pH values, water contents and reaction times were investigated. The chemical composition and morphology were analyzed by inductively coupled plasma atomic emission spectrometer (ICP-AES) and scanning electron microscope (SEM). The experiments showed that both DTC and TMT-15 were effective at stabilizing the heavy metals in the FGD gypsum, with more than a 50% curing effect for all the heavy metals except Pb. DTC showed a better stabilization for Pb, Hg, Cu, Zn, and Cr, and TMT-15 showed a better curing effect for Cd. The solidified gypsum had good heavy metal stability in low-water-content environments. Increasing the mass fraction, reaction time, and pH decreased the heavy metal leaching, and the mass fraction had the greatest effect on the total heavy metal leaching concentration, followed by the reaction time and pH value.

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Section: Effect Of Ph On Environmental Release Of Heavy Metals From G...mentioning

confidence: 99%

Solidification and Release Characteristics of Heavy Metals in Gypsum from Coal-Fired Power Plants

Wang,

Wei,

Zhao

et al. 2024

Energies

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“…Small particles pass through the electrostatic precipitator (ESP), reach the WFGD device and are retained there due to adsorption, co-precipitation or other chemical reactions [23] [24]. Although trace elements are greatly accumulated in gypsum [15], a smaller amount is emitted to the atmosphere through the stack gas [13] [20].…”

Section: Introductionmentioning

confidence: 99%

Distribution and Accumulation of Major and Trace Elements in Gypsum Samples from Lignite Combustion Power Plant

Pavlin¹,

Jačimović²,

Stergaršek³

et al. 2018

AJAC

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Flue gas containing volatile elements, fine fly ash particulates not retained by particle control devices, and limestone are the most important sources of trace and major elements (TMEs) in wet flue gas desulphurization (WFGD) gypsum. In this study, samples of gypsum slurry were separated into fine and coarse fractions. Multi-elemental analysis of 45 elements in the different size fractions of gypsum, slurry waters and lignite were performed by k 0-INAA (k 0-instrumental neutron activation analyses). The study found that the volatile elements (Hg, Se and halogens) in the flue gas accumulate in the fine fractions of gypsum. Moreover, the concentrations of most TMEs are considerably higher in the fine fractions compared to the coarse fractions. The exceptions are Ca and Sr that primarily originate from the limestone. Variations of TMEs in the finer fractions are dependent on the presence of CaSO 4 •2H 2 O that is the main constituent of the coarse fraction. Consequently, the content of TMEs in the fine fraction is highly dependent on the efficiency of separating the fine fraction from the coarse fraction. Separation of the finer fraction, representing about 10% of the total gypsum, offers the possibility to remove effectively TMEs from WFGD slurry.

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Heavy metals distribution characteristics of FGD gypsum samples from Shanxi province 12 coal-fired power plants and its potential environmental impacts

Hao

Qiu

Pan

et al. 2017

Fuel

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Leaching Characteristics of Trace Elements in Desulfurization Gypsum from a Coal-Fired Power Plant

Cited by 3 publications

References 15 publications

Solidification and Release Characteristics of Heavy Metals in Gypsum from Coal-Fired Power Plants

Solidification and Release Characteristics of Heavy Metals in Gypsum from Coal-Fired Power Plants

Distribution and Accumulation of Major and Trace Elements in Gypsum Samples from Lignite Combustion Power Plant

Heavy metals distribution characteristics of FGD gypsum samples from Shanxi province 12 coal-fired power plants and its potential environmental impacts

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