Emulsion pertraction of heavy metals from waste water
report
Emulsion pertraction is a new membrane based combined extraction and stripping processfor the recovery ofheavy metalsfrom waste water. In the emulsion pertraction process the waste wateris kept apartfrom an emulsion phase by means ofa hydrophobic microporous membrane. The emulsion used in emulsion pertraction consists of an organic solvent with a dissolved extractant as continuous phase with aqueous droplets ofstrip liquid dispersed in it. Main advantages ofpertraction over normal extraction are: 1)extraction and stripping in one operation, 2) no possibility of emulsion formation in the water phase, 3) volume of extractant is relatively small, 4) compact modular equipment and 5) low energy consumption. Emulsion pertraction can be applied for the recovery from waste water of different heavy metals like Zn, Hg, Cd, Cu, Cr and Ni.
TNO Identifier
253312
Publisher
TNO
Collation
8 p.
Place of publication
Apeldoorn