Impact of H₂O on the Adsorption of Hg⁰ on Activated Carbon.

ABSTRACT: In this work, the influence of water on the adsorption of mercury is systematically investigated on basic and washed activated carbons. Breakthrough curves were measured and temperature-programmed desorption (TPD) experiments were performed with mercury and water. Both physisorptive and chemisorptive interactions are relevant in the adsorption of mercury. The experiments show that the presence of water in the pores promotes chemisorption of mercury on washed activated carbons while there is little influence on chemisorption on basic materials. Washing exposes or forms oxygen functional groups that are chemisorptive sites for mercury. Obviously, effective chemisorption of mercury requires both the presence of water and of oxygen functional groups. As mercury chemisorption is preceded by a p

SUBMITTER: Steinhaus J 

PROVIDER: S-EPMC8264938 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature