title: [Study on the spectrum of the flocculent conformation of polymer ferric sulfate flocculants].
abstract: In the present paper, the flocculent conformation and qualities of polymer ferric sulfate flocculants were studied by the ultraviolet-visible spectrum. The spectra of polymer ferric sulfate flocculants at different pH values, the microcosmic flocculent conformation of polymer ferric sulfate flocculants corresponding to some peaks in the spectrum, the reaction mechanism and the effects of different pH value on turbidity and colour removal and described. The absorbance of peaks in the wavelength range of 200-1100 nm all increased with pH value rising from 1.0 to 2.5. The absorbance of peaks in the wavelength range mentioned above did not continuously increased with pH value rising above 2.5, and some of them are even decreased apparently. The flocculent effects of turbidity and colour removal on stimulant waste water is optimum at pH 2.0. When pH value is in the range of 1.5 to 2.0 and 2.0 to 2.3, the flocculent effects are also better. However, the flocculent effect is decreased apparently when pH value is over 2.5. The change in the spectral curve of the different pH polymer ferric sulfate flocculants is corresponding to the flocculent effects of turbidity and colour removal on stimulant waste water to some extent. The research method has potential application prospect for the better flocculation conformation analysis and identification of the polymer ferric flocculants. And it can provide some easy and actable methods for the flocculation conformation analysis and identification of high polymer ferric flocculants.
authors.affiliation: College of Chemical and Chemistry Engineering, Chongqing University, Chongqing 400044, China. zhenghl@cta.cq.cn
authors.forename: Huai-li
authors.initials: HL
authors.lastname: Zheng
authors.forename: De-jun
authors.initials: DJ
authors.lastname: Peng
authors.forename: Xiao-hong
authors.initials: XH
authors.lastname: Huang
authors.forename: Hong
authors.initials: H
authors.lastname: Liu