污水处理材料聚乙烯醇缩甲醛的制备

Preparation of sewage treatment material PVFM

为了研究制备污水处理材料聚乙烯醇缩甲醛(简称PVFM)的最佳操作条件,采用机械打泡法和化学发泡法,通过单因素实验和正交试验,考察原料用量、反应时间以及反应温度等因素对PVFM制备的影响,并利用SEM对材料进行检测,通过污水处理对比实验,探究材料的污水处理性能。结果表明,在聚乙烯醇(简称PVA)质量分数为9%(50mL)、纤维素用量为0.4g、硫酸用量为6mL、甲醛用量为6mL、十二烷基磺酸钠用量为0.4g、碳酸钙用量为0.8g、反应温度为30℃、硫酸滴加时间为9min、甲醛滴加时间为4min、固化时间为8h的条件下,制得的PVFM材料理化性能良好,而且PVFM材料对模拟废水COD和氨氮都有较好的去除效果。采用机械打泡法和化学发泡法可制得性能良好的污水处理材料PVFM。

In order to study the optimal operating condition of the sewage treatment material PVFM(polyvinyl formal),the mechanical blowing method and the chemical foaming method are adopted.Single-factor experiments and orthogonal experiments are conducted to study the factors including the amount of raw materials,reaction time and reaction temperature influencing the preparation of the material PVFM.The material is characterized by SEM.The properties of the material are explored through the contrastive experiments of sewage treatment.The results show that when PVA mass concentration is 9%(50 mL),cellulose content is 0.4 g,sulfuric acid content is 6 mL,formaldehyde content is 6 mL,SDS content is 0.4 g,carbonate calcium content is 0.8 g,reaction temperature is 30℃,the dripping time of sulfuric acid is 9 minutes,the dripping time of formaldehyde is 4 minutes,and the curing time is 8 hours,the material has good physical and chemical property,and the results of the contrastive experiments of sewage treatment show that PVFM has good removal effects on both COD and NH4+-N in simulated sewage.The sewage treatment material PVFM with good properties can be obtained by the mechanical blowing method and the chemical foaming method.