The aim of the research is to build a foundation of theory and practice for controlling the pollution of TCs residues,the main research contents are as follows:(1) The new separation and preconcentration technology of hydrophilic organic solvent floatation(HOSF) has been set up on the basis of traditional

Combining solvent sublation with aqueous two-phase extraction (ATPE),a new preconcentration/separation method was established:aqueous two-phase gas solvent sublation (ATGS).

Study on recovery iodine from wet-process phosphoric acid by solvent flotation;

Determination of trace boron by ternary-assiociation compound solvent flotation spectrophotometry;

Association complex-solvent flotation spectrophotometric determination of dyestuff content in printing and dyeing wastewater;

Study on determination of trace chromium in environmental sample by solvent floatation spectrophotometry;

A method for the determination of trace platinum by solvent sublation spectrophotometryis reported in this paper.

Combining solvent sublation with complexation extraction,the concept of Flotation Complexation Extraction(FCE) was proposed.

In the process of solvent sublation, the hydrophobic compounds are levitated on bubble surface to the top of an aqueous column where they encounter a solvent layer to which the material is transferred as the bubbles move through the solvent layer.