disclosed is an hg capture system adapted for advantageous placement within a container housing a fluorescent lamp . such hg capture system includes a substrate impregnated with between about 0 . 08 and 0 . 23 g / cm 2 carbon carrying between about 5 % and 15 % sulfur , basis carbon weight , reacted with between about 0 . 02 to about 1 % by weight iodine , basis sulfur weight . the corresponding method for scouring released vaporous hg housed within a container includes providing a source of carbon carrying between about 5 % and 15 % sulfur , basis carbon weight , reacted with between about 0 . 02 to about 1 % by weight iodine , basis sulfur weight ; and placing within the container a substrate bearing an effective amount of the iodine reacted sulfur for scouring hg released within the container .