[Preparation and structural analysis of diatomite-supported SPFS flocculant].

In the presetn study, polymerized ferric sulphate (PFS) flocculant was prepared and tested. In the preparation of PFS flocculant, industrial by-product ferrous sulfate heptahydrate (FeSO4.7H2O) was reused as the main material.

[Topography structure and flocculation mechanism of polymeric phosphate ferric sulfate (PPFS)].

Characteristics of polymeric phosphate ferric sulfate (PPFS) were investigated using FTIR (Fourier transform infrared spectrometer), XRD (X-ray diffraction) and SEM (scanning electron microscope) in the present study. The formed PPFS structure and morphology were stereo meshwork, which was clustered and close to coral reef, synthesis of high charge density, bioactive polyhydroxy and mixed polynuclear complex PPFS. The results showed that charge neutralization of PPFS had not played a decisive role in the coagulation beaker test and the zeta potential proved that PPFS was largely affected by bridging and netting sweep.

[Study of ferric species distribution in polymeric phosphate ferric sulfate (PPFs)].

Based on the strong polymeric role of phosphate (PO4-) on the PFS, PO4(3-) was introduced in the ferric sulfate (PFS), and a new type of composite flocculant polymeric phosphate ferric sulfate (PPFS) was developed. The study includes the preparation of PPFS, and erric species distribution in PFSS was investigated by ultraviolet-visible spectrum method, infrared spectrum method and Fe-ferron complexation timed spectrophotometry method. The ultraviolet-visible spectrum showed that the change in the spectral curve of the different pH polymer ferric sulfate flocculants is corresponding to the flocculation morphology.