ザンセートおよびエロフロートを利用した廃水中の水銀の除去 (第2報)

Hg²⁺の浮上法による除去

抄録

The removal of Hg²⁺ has been studied by the flotation technique.
Ethyl xanthate and ethyl aerofloat were used as collectors forming insoluble and hydrophobic Hg²⁺ salts.
The solutions containing 1.0 or 10.0ppm of Hg²⁺ were treated with collectors by a Denver Sub A type. flotator, then the residual solutions were analysed spectrophotometricaly by the dithizon method.
By the flotation technique, it was found that residual Hg²⁺ concentration was reduced to 0.06ppm while by the filtration technique it was below 0.02ppm.
The effect of coexistence of metal ions such as Fe²⁺, Cu²⁺, Zn²⁺ and Cd²⁺ on the removal of Hg²⁺ was also examined and the removal of Hg²⁺ was found to be prevented to a certain extent by these metal ions. However lower xanthate and aerofloat were found to be suitable for the removal of Hg²⁺ from the waste water containing these other metal ions.