煅烧铝柱撑膨润土处理氨氮废水的试验研究

摘要

With the hydrolysis and polymerization nature of aluminum ion, aluminum pillared bentonite which n(OH-) : n(A13+) =2.0 was prepared by hydro-thermal ino-exchage methods with Sodium bentonite as raw material and was calcined at 500℃ for 2h. The effects of calcined aluminum pillared bentonite dosage, waste water pH, reaction time, temperature and the original ammonia concentration on the ammonia were studied. The results showed that the ammonia removal efficiency reached the maximum under following conditions: the ammonia initial concentration wasl00mg/L, the dosage quatity was 3.0g/25mL, pH value was 9, the temperature was 25℃, the adsoprtion time was 60min, and the removal ratio reached 86.9%.%利用铝离子水解聚合的性质,以钠基膨润土为原料,采用水热法制备了n(OH-)∶n(Al3+)=2.0羟基铝柱撑膨润土,将其在500℃下煅烧2h.研究了经煅烧后柱撑膨润土投加量、溶液pH值、时间、温度、初始氨氮浓度对氨氮吸附性能的影响.结果表明:当氨氮初始浓度为100mg/L,投加量为3.0g/25mL、pH值为9、温度为25℃、时间为60min时,氨氮的去除率达到最大,可达到86.9％以上.