聚合硫酸铝钛的制备与结构表征

doi:10.16085/j.issn.1000-6613.2017-2243

摘要/Abstract

摘要： 以硫酸铝、硫酸钛为原料制备无机复合高分子混凝剂聚合硫酸铝钛（PATS）。采用Ferron逐时络合比色法、红外光谱、X射线衍射、扫描电镜与能谱对产物中Al的形态、结构形貌、组成进行表征分析。采用单因素实验法获得最佳合成条件：反应温度50℃、n（Ti）/n（Al）为0.3∶1与n（OH）/n（Ti+Al）为0.3∶1。形态分析表明n（OH）/n（Ti+Al）、反应温度与n（Ti）/n（Al）对Al形态分布均存在影响，且n（OH）/n（Ti+Al）与n（Ti）/n（Al）对Al形态影响较大。随着n（OH）/n（Ti+Al）增大，Al_a含量逐渐降低，Al_b与Al_c含量逐渐升高；随着n（Ti）/n（Al）的增大，Al_a含量逐渐升高，Al_b与Al_c含量逐渐降低；随着反应温度升高，Al_a为主要形态，其含量在78.94%～85.49%，且Al_a、Al_b都呈现先减小后增大的趋势，Al_c含量则呈现先增大后减小的趋势。红外光谱与X射线衍射结果表明硫酸铝与硫酸钛发生了聚合反应，生成了高分子聚合物；扫描电镜表明PATS形貌团簇，呈网状结构，有助于吸附架桥和网捕卷扫，增强了PATS的混凝性能。

关键词: 混凝, 聚合, 聚合物, 吸附, 除磷, 浊度

Abstract: Poly aluminum titanium sulfate (PATS), an inorganic composite polymer coagulant, was prepared with aluminum sulfate and titanium sulfate. Ferron-complexation timed spectrophotometric method, infrared spectroscopy, X-ray diffraction, scanning electron microscopy and energy were applied to analyze the morphology of Al and the structure, morphology and the composition of PATS. The optimum synthesis conditions were obtained by single factor experiment as:reaction temperature was 50℃, the molar ratio of n(Ti)/n(Al) was 0.3:1 and the molar ratio of n(OH)/n(Ti+Al) was 0.3:1. Morphological analysis showed that reaction temperature, and the ratios of n(Ti)/n(Al) and n(OH)/n(Ti+Al) had influence on the morphology distribution of Al, and the latter are more significant. With the increase of n(OH)/n(Ti+Al), the content of Al_a decreased gradually, while the content of Al_b and Al c increased gradually. With the increase of n(Ti)/n(Al), the results are totally oppsite. With the increase of reaction temperature, Al_a is dominant, and its content changed in the range of 78.94%~85.49%, showing a trend of decreased first and then increased which was also observed for Al_b, however the content of Al c was increasing first and then decreasing with reaction tempeature. The results of infrared spectroscopy and X-ray diffraction confirmed that the polymerization of aluminum sulfate with titanium sulfate occurred, with macromolecule polymer formed. The scanning electron microscopy showed that the morphology of PATS clusters were network structure, which was beneficial for the adsorption bridging and netting sweeping, and enhanced the coagulation performance of PATS.

Key words: coagulation, polymerization, polymers, adsorption, phosphorus removal, turbidity

中图分类号:

X703.1

张鹏, 王雨露, 张文, 廖为雄, 赵冬琴. 聚合硫酸铝钛的制备与结构表征[J]. 化工进展, 2018, 37(07): 2740-2747.

ZHANG Peng, WANG Yulu, ZHANG Wen, LIAO Weixiong, ZHAO Dongqin. Synthesis and characterization of an inorganic composite polymer coagulant of poly aluminum titanium sulfate[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2740-2747.

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