An assessment of acid wash and bioleaching pre-treating options to remove mercury from coal

Studies of the correlation between mercury content and the content of various forms of sulfur in Polish hard coals

“…The first group includes methods of removing mercury from the exhaust gases. The second group includes methods of reducing mercury content in coal before its utilization, such as: coal cleaning [12][13][14], mild pyrolysis [15][16][17], selective mining [13,[18][19][20], sub-critical water extraction [21,22], leaching with SO 2 [23], bioleaching [24,25], or the HyperCoal process [26,27]. The effectiveness of these methods is strongly determined by various forms of mercury occurrence in coal, resulting from the genetic diversity of coal, i.e.…”

Potential of thermal treatment for decontamination of mercury containing wastes from chlor-alkali industry

“…If economically or environmentally viable, hazardous waste should be recycled, limiting the risk to environment and public health. Technologies applied for removal or stabilization of Hg in contaminated solid waste or soil include solidification/stabilization [2,[6][7][8][9][10], soil washing [10][11][12], thermal treatment [10,[13][14][15][16], and vitrification [10]. A comparison of the different technologies is provided in [10].…”

Managing mercury in the great lakes: An analytical review of abatement policies

“…Until the time all coal-fired power plants are phased out, it is necessary to adopt stringent mercury emission limits for all coal-fired boilers and develop effective strategies for dealing with coal combustion waste (Keating, 2003). Several options including thermal pre-treatment of coal (Guffey and Bland, 2004), pre-treating coal with acid wash and bioleaching (Dronnen et al, 2004), flue gas desulphurization (FGD) technologies (Pacyna and Pacyna, 2002;Pacyna et al, 2003), and activated carbon injection (Li et al, 2005) are available for controlling mercury in coal-fired power plants (Pavlish et al, 2003). suggested a three-stage system involving electrostatic precipitators, wet scrubbers, and a filsorption unit to remove mercury from flue gases in incinerators.…”