The wet flue gas desulfurization（WFGD） can remove the elemental mercury when removing SO

2

but the parameters have a great influence on the mercury removal efficiency. To study the effect of various parameters of WFGD on the elemental mercury removal efficiency

the wet desulfurization process was simulated under laboratory conditions. The effects of temperature

O2 concentration

SO

2

concentration

p H value

slurry concentration and halogen ion（Cl

-

Br

-

I

-

）concentration on the elemental mercury removal efficiency were investigated.

The experiment results show that the best reaction temperature is 55 ℃. The mercury removal efficiency increases with the increase of pH value

O

2

concentration and slurry concentration

but SO

2

shows resistance performance for mercury removal with the increase of SO

2

concentration. Cl

-

Br

-

and I

-

can promote Hg

0

removal. The order of promotion is Br

-

> I

-

> Cl

-

.