天然黏土与PAC联用对含藻水体的处理效果研究

Research on the Treatment Effects of Natural Clay Combined with PAC on Algae-Containing Water

水环境的质量会直接影响社会经济的可持续发展,絮凝除藻是一种常见的化学除藻方法。天然絮凝剂因其来源广泛、危害较小等特点逐渐受到关注,本次研究选择天然黏土,并将它们与PAC联用以对含藻水体进行处理。结果表明:PAC对含藻水体具有显著的去除效果,但是PAC投加量过高时蓝藻去除率会呈下降趋势;高岭土和沸石与PAC的联用有利于蓝藻的去除,它们能够发挥助凝的作用,其中预先投加高岭土的效果更好,250目(粒径0.065 mm)沸石的去除效率更高。此外,水体pH值会显著影响黏土与PAC对含藻水体的去除效果。

The quality of aquatic ecosystem could directly affect the sustainable development of social economy.Flocculation is a common chemical method for removing algae.Natural flocculants have attracted more and more attention due to their wide sources and small harm.In this study,natural clays were selected and combined with PAC to treat algal water.The results showed that PAC had significant removal effect on algae-containing water,but the removal rate of cyanobacteria would decrease when PAC dosage was too high.The combined application of kaolin and zeolite with PAC was beneficial to remove cyanobacteria,and they could play the role of aiding coagulation.The effect of pre-adding kaolin was better and the removal efficiency of 250 mesh zeolite was better.In addition,water pH significantly affects the removal effect of clay and PAC on algae-containing water.