聚磷氯化铝的制备新方法及其性能研究

On Novel Synthetic Method and Performance of Polymeric Phosphate-aluminum Chloride(PPAC)

以磷矿粉为原料,用超声波分散、酸浸,碱法制备复合聚磷氯化铝,并研究其优化制备条件和水处理混凝性能。研究内容包括:盐酸投加量、温度、加热时间、磷铝摩尔比对产物中氧化铝含量的影响,对产物进行红外分析、电镜分析,并将产物用于生活污水处理试验。研究结果显示:加盐酸量为48mL,温度为100℃,加热时间为180min,磷铝摩尔比为0.20时,产物中氧化铝含量最高,红外分析证明了产物的结构,电镜分析表明产物表面积较大,且凝聚态强,将试验制备的聚磷氯化铝用于处理生活污水时,当混凝剂投加量为0.32mL/L,pH值范围处于7.5～10.0,快速搅拌时间为4.0min时,COD去除率可达到73.1%,浊度去除率可达到99.0%。

The optimal preparation conditions and coagulation/flocculation performance of polymeric phosphate-aluminum chloride （PPAC） were measured. Some parameters such as acid dosage, temperature, reaction time and P/AL molar ratio were investigated. Also, infrared spectroscopy and scattering electron were used to characterize the structure of PPAC. In addition, the coagulation/flocculation process was carried out for wastewater treatment. It is shown that the maximum alumina content is achieved when acid dosage, temperature, time and P/AL molar ratio are 48 ml, 100 ℃, 180 min and 0. 2 respectively; infrared spectroscopy analysis fits well with the product＇ structure; scattering electron analysis suggests a large surface area and a strong condensed state for PPAC; the removal efficiency of 73. 1% and 99.0% for COD and turbidity respectively are obtained when coagulant dosage, pH value and agitation speed are 0.32 ml/L, 7. 5410.0 and 4.0 min respectively.