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Flue gas desulphurization (FGD) gypsum samples were collected from 70 power plants in 20 provinces in China. The total Hg concentration, chemical speciation and leaching toxicity of Hg in the samples were determined. The total Hg concentrations ranged from not detectable (ND) to 4330μg/kg with an average of 891μg/kg and a median of 629μg/kg. The Hg concentrations in the FGD samples had obvious regional...
Mercury (Hg) in municipal solid waste incineration fly ash attracts much attention for its potential risk in environment and human health. In this work, Hg in fly ashes collected from 15 cities over China was surveyed in terms of speciation, leaching behavior and health risk assessment. In general, total Hg (HgT) concentration was 1–24mgkg−1, where fly ash in esten cities had higher HgT concentration...
Wet flue gas desulfurization (WFGD) system has been increasingly recognized to be effective in Hg removal. But the generated secondary pollution due to Hg re-emission from desulfurization solutions or solid byproducts has received researchers’ attention. In this paper, the distribution of captured Hg2+(L) in the simulated WFGD slurry was studied as a function of various environmental factors. Experimental...
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