The experimental setup for Hgo adsorption (Fig. 1) was prepared similarly in our previous work [18]. The Hgo was generated
using a mercury permeation device (VICI Metronics Inc., USA) loaded in a U-tube, supported with glass beads, and maintained
at 45.5±0.5 oC placed in a water bath in which it generated 51 ng/min of Hgo. Purified nitrogen (99.999%) was used as a carrier