Aluminum sulfate, PAC and PASS were used for the treatment of Pearl River raw water; colloidal particles of coagulants and colloidal particles in water before or after coagulation were determined, and the economic benefit was analyzed.

Modeling experiments on controlling profile by gel particles.;

Peal river supply water was treated by enhanced coagulation, colloid particles of water before or after coagulation were determined and studied, the influences of mixing condition for coagulation were probed.

The study of ~(99)T_c~m-sulphur colloidal particles properties Purpose The ~(99)T_c~m-sulphur colloid was obtained from a given reagent kit and labeling procedure.

The ordered arrays of titanium dioxide(TiO2)and polystyrene(PS)core-shell microspheres were prepared from composite suspensions of TiO2 colloidal particles with nanometer size and polystyrene colloidal particles with submicron size by using the vertical co-deposition method.