Mercury

Fusion medium method( 熔 融 介 质 法 ):using some
inorganic medium such as metals and inorganic
salts, etc. instead of air as the medium for heat
transfer and reaction during the process of
combustion.
This method would not produce dioxins and other
related pollutants and doesn’t have strict
requirements for the samples, but high expense is
needed in the treatment of waste gas and residue.
Plasma method: a technology using plasma as the
heat source, high cost.