STUDY ON FLOTATION SEPARATION OF MERCURY (II) WITH THE SYSTEM OF AMMONIUM SULFATE-AMMONIUM THIOCYANATE-RHODAMIN B-WATER

摘要

This paper describe the separation of mercury (II) from other metal ions using the system of ammonium sulfate, ammonium thiocyanate, rhodamin B, and water. The results showed that 1.0g (NH_4)_2SO_4 and 0.5mL of a solution of 0.1mol/L NH_4SCN and 1.0mL of a solution of 1.0x 10~(-3)mol/L RhB,Hg~(2+) could be floated quantitatively. Under the conditions of this experiment, Cd~(2+), Cu~(2+), Mn~(2+), Co~(2+), Ni~(2+), Fe~(2+) and Al~(3+) could not be floated, so Hg~(2+) could be separated successfully from those metal ions by flotation at pH7.0. This method has been used for the flotation separation of Hg~(2+) in the sample of synthetic water and the results were satisfactory.