Each of these reactions includes the transfer of two electrons to
the Hg(II) central cation. For both proposed reactions in Eqs. (2)
and (3), the increase of pH-value would result in a shift towards
the product side. According to the Nernst equation, the reducing
force of both reducing agents increases in alkaline medium. Thus,
increased Hg0 formation and desorption is expected during the
alkalization of FGD waste water. According to [31], potential intermediates
of these reactions are formed by the transfer of a single
electron, such as mercurous species and the sulfite radical anion.
Hence, the disproportionation of Hg+ is an additional pathway of
Hg0 generation.
Each of these reactions includes the transfer of two electrons tothe Hg(II) central cation. For both proposed reactions in Eqs. (2)and (3), the increase of pH-value would result in a shift towardsthe product side. According to the Nernst equation, the reducingforce of both reducing agents increases in alkaline medium. Thus,increased Hg0 formation and desorption is expected during thealkalization of FGD waste water. According to [31], potential intermediatesof these reactions are formed by the transfer of a singleelectron, such as mercurous species and the sulfite radical anion.Hence, the disproportionation of Hg+ is an additional pathway ofHg0 generation.
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