Abstract: A composition able to absorb mercury vapor and to disinfect a surface. The composition hasa source of halogen; anda non-aqueous solvent of low vapor pressure for the source of halogen. The composition is of low vapor pressure.

Abstract: A composition to absorb mercury vapour and to suppress mercury vapour. The composition comprises an iodide and a polyhydric alcohol. It may include a Lewis acid. A method of absorbing mercury comprising applying to the source of the mercury the above composition is described.

Abstract: A composition to absorb mercury vapor and suppress the formation of the vapor. The composition comprises a carrier liquid, for example water, an alcohol or glycol, copper ions, for example copper sulphate and thiosulphate ions, for example sodium thiosulphate. The absorbent is efficient and clean in use.

Abstract: Mercury filter for collecting low concentration mercury vapor in gas. Filter has an absorber having a collecting surface of a material that amalgamates readily with mercury, the surface having a reactive tarnish produced by exposure of the plates to available iodine. The absorber can have spaced collecting members with the gas passing about the collecting members. Optionally at least one of the collecting members is at a higher electrical potential difference than the remaining member, which potential difference is insufficient for the filter to act as an electrostatic precipitator so as to reduce attraction of dust. An optional electrically insulating porous matrix can extend between the collecting members and should have sufficient porosity to permit air to flow relatively freely between the collecting members.