Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 37, Issue 24, Pages 5763-5766Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es034352s
Keywords
-
Categories
Ask authors/readers for more resources
Experimental data from a laboratory-scale wet scrubber simulator confirmed that oxidized mercury, Hg2+, can be reduced by aqueous S(IV) (sulfite and/or bisulfite) species and results in elemental mercury (Hg-0) emissions under typical wet FGD scrubber conditions. The S(IV)-induced Hg2+ reduction and Hg-0 emission mechanism can be described by a model which assumes that only a fraction of the Hg2+ can be reduced, and the rate-controlling step of the overall process is a first-order reaction involving the Hg-S(IV) complexes. Experimental data and model simulations predict that the Hg2+ in the flue gas can cause rapid increase of Hg-0 concentration in the flue gas across a FGD scrubber. Forced oxidation can enhance Hg2+ reduction and Hg-0 emission by decreasing the S(N) concentration in the scrubbing liquor. The model predictions also indicate that flue gas Hg-0 increase across a wet FGD scrubber can be reduced by decreasing the pH, increasing S(IV) concentration, and lowering the temperature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available