聚合硫酸铁絮凝剂的絮凝形态光谱研究

利用紫外-可见光谱研究了聚合硫酸铁絮凝剂的絮凝形态及其性能。研究内容包括：不同pH的聚合硫酸铁絮凝剂溶液的吸收光谱，吸收光谱中有关吸收峰对应的聚合硫酸铁絮凝剂微观形态、反应机理以及絮凝除浊、除色效果比较。研究发现：当pH值在1.0～2.5之间时，在200～1 100 nm范围内随着pH升高所有峰的吸收值均增加；当pH大于2.5时, 随着pH上升，峰的吸收值并不继续增加，有些吸收波段光谱吸收值反而下降, 甚至明显下降; 在pH值为2.0时，絮凝效果最好；在pH值为1.5～2.0之间和2.0～2.3之间也有较好的絮凝效果。在200～400 nm处, 不同pH的聚合硫酸铁絮凝剂的光谱曲线变化与絮凝效果有一定的对应关系。研究结果对于聚铁类絮凝剂的优势絮凝形态的分析和鉴定有潜在应用前景，有利于为聚铁高分子絮凝剂形态分析和鉴定提供一些简便易行的方法。

Study on the Spectrum of the Flocculent Conformation of Polymer Ferric Sulfate Flocculants

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 200-1 100 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.