The carbonaceous adsorbent was prepared from mixtures of dewatered sludge and sawdust with enhanced ZnCl

2

chemical activation.Characteristics of the adsorbent were studied using scanning electron microscope(SEM)

Fourier transform infrared spectroscopy(FT-IR)

and adsorption of nitrogen.The surface analysis showed that the carbonaceous adsorbent had good specific surface and porosity(394 m 2·g

-1

of BET surface

0.12 and 0.10 ml·g

-1

of microporous and mesoporous volume

respectively) .The oxygen functional groups such as-OH

C-O and C=O were found on the surface by FTIR and XPS(X-ray photoelectron spectroscopy) .The adsorption of elemental mercury(Hg0) on the carbonaceous adsorbent was studied in a fixed bed reactor.The dynamic adsorption capacity of carbonaceous adsorbent increased with influent mercury concentration

from 23.6μg·g

-1

at 12.58μg·m

-3

to 87.9μg·g

-1

at 72.50μg·m

-3

and decreased as the adsorption temperature increased

from 246 μg·g

-1

at 25℃ to 61.3μg·g

-1

at 140℃

when dry nitrogen was used as the carrier gas.The carbonaceous adsorbent presented higher dynamic adsorption capacity than activated carbon

which was 81.2μg·g

-1

and 53.8μg·g

-1

respectively.The adsorption data were fitted to the Langmuir adsorption model.The physical and chemical adsorption were identified on the adsorbent.