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制备了碱化度(B)及不同Al~(3+)/SO_4~(2-)摩尔比的系列PACS,用Al-Ferron逐时络合比色法研究了铝的形态分布,考察了碱化度(B)、Al~(3+)/SO_4~(2-)摩尔比、稀释作用及pH值对铝的形态分布的影响.实验结果表明,Al~(3+)/SO_4~(2-)摩尔比及溶液的pH值对铝的形态分布有较大的影响,稀释作用对铝的形态分布影响较小.Al~(3+)/SO_4~(2-)摩尔比愈小,pH值愈高,铝的水解聚合大分子及胶体粒子所占的比例就愈大.
A series of PACS with different degree of alkalization (B) and different molar ratio of Al 3+ / SO 4 2- was prepared. The morphology of aluminum was studied by Al-Ferron time-lapse colorimetric method. The effect of Al 3+ / SO 4 2- molar ratio, dilution and pH on the morphological distribution of aluminum was investigated. The experimental results show that the Al 3+ / SO 4 2- -) molar ratio and the pH value of the solution have a great influence on the morphological distribution of aluminum, and the dilution has little effect on the morphological distribution of aluminum. The smaller the molar ratio of Al ~ (3 +) / SO_4 ~ (2-) The higher the value, the greater the proportion of hydrolyzed polymeric macromolecules and colloidal particles of aluminum.