季磷盐改性蒙脱土去除球形棕囊藻的实验研究

用L9(34)正交实验对季磷盐改性蒙脱土制备的工艺进行了优化,在60℃、搅拌时间6h、pH7、季磷盐与蒙脱土的阳离子交换容量比为1.5:1.0的条件下,制备得到的季磷盐改性蒙脱土,并考察了其对球形棕囊藻去除效果和影响因素.结果表明,作用48 h后, 20.0mg/L的改性蒙脱土除藻率可以达到93.2%以上.通过FT-IR、XRD和SEM等方法表征发现,季磷盐插入蒙脱土的层间,能够有效降低黏土颗粒与藻细胞间的静电斥力,使其吸附藻细胞性能提高.对比除藻实验结果显示,季磷盐改性蒙脱土除藻效果明显优于未改性蒙脱土、季磷盐改性高岭土和季铵盐改性蒙脱土.

Study on removal of Phaeocystis globosa with organic modified montmorillonite by quaternary phosphonium

L9(34) orthogonal experiments were carried out to investigate the optimum condition of the organic modified montmorillonite by quaternary phosphonium. The removal rate of Phaeocystis globosa with the concentration of 20.0 mg/L of modified montmorillonite, which the prepared conditions, at a temperature of 60.0℃ , at a pH 7.0, at stirring time of 6h, and the mole rate between the cationic exchange capacity of montmorillonite and quaternary phosphonium 1.5:1.0 was 93.2% after 48 h. The results of FT-IR, XRD and SEM characterized the surface structure of modified montmorillonite showed that quaternary phosphonium can be inserted effectively into the interlayer of momtmorillonite , reduced the electrostatic attraction between the momtmorillonite and algal cell, which cause the effect on adsorption of algal cell increasing. The results of compared the removal rate of the montmorillonite and kaolin modified by quaternary phosphonium, and the modified montmorillonite by quarternary ammonium indicate that modified montmorillonite by quaternary phosphonium was superior to others.