摘要
聚硅酸硫酸铝(PSAS)是一类性能优良的无机高分子絮凝剂。以水玻璃、硫酸铝、硫酸为原料合成了PSAS絮凝剂,探讨了反应物浓度、反应温度、反应时间、pH值、Al3+与SiO2物质的量比对产品PSAS制备及混凝脱色性能的影响。在pH=5.0～5.5的弱酸性介质中,PSAS最佳合成条件是SiO2的浓度为2.0％～3.0％,温度为20～30℃,Al3+与SiO2物质的量比为1.0。对染料废水的混凝试验表明产品的絮凝脱色性良好,脱色率≥97％,COD去除率≥80％。该絮凝剂与其它无机絮凝剂相比,在降低色度、悬浮物、COD方面效果显著。
Polysilic Aluminium Sulphate (PSAS) is a novel inorganic polymer.It is synthesized by sodium silicate, aluminium sulfate and sulfuric acid in this paper. The effects of reaction concentration, reaction temperature, reaction time, different pH, molar ratio of Al/Si on properties of product and flocculating properties are investigated. The optimum synthesis conditions was that the concentration of SiO2 is 2.0%-3.0%, the temperature is 20-30 ℃ , molar ratio of Al/Si is 1.0 under pH = 5 .0 - 5 .5 . The result indicate that PSAS is superior on tread dying wastewater. The decolorize efficiency is≥ 97 % , and the removal efficiency of COD ≥ 80 % , and PSAS has obvious effect on suspending agent, color and COD reducing.
出处
《化工时刊》
CAS
2003年第2期38-41,共4页
Chemical Industry Times
