水生植物组合对受污水体的原位修复研究

Study of the in-situ repair on polluted water by aquatic plants

为进一步验证狐尾藻、金鱼藻及蓖齿眼子菜三种水生植物组合对实际污染水体的处理效果,建立了植物围栏,研究原位条件下植物组合对受污染水体中营养盐类的去除效果。结果表明,原位状态下,围隔内各组水生植株组合均能对水体中污染物质具有一定去除作用。相对于对照组,狐尾藻+金鱼藻组合去除氮类营养盐效果最好;篦齿眼子菜+狐尾藻组合对水体中溶解性磷类营养盐去除效果最好;篦齿眼子菜+狐尾藻的植物组合水体中溶解性CODMn去除效果最好,而综合来看,狐尾藻+金鱼藻的组合对各位营养盐的去除效果最好。

The previous batch experiments have verified that three kinds of aquatic plants(Myriopliylluin,C eratophyllum and Potam ogeton pectinatus)can obviously absorb and decom pose the nutrients and pollutants in w ater body.In order tofurther verify the treatm ent effect of the selected aquatic plants'com bination on the actual polluted w ater,a plant fence was established to study the rem oval of the nutrients in polluted water under in-situ conditions.The results showed that the combination of aquatic plants in the fence could remove the pollutant in water under in-situ conditions.Compared to the control group,the combination of Myriophyllum and Ceratophyllum showed the best removal effect of nitrogen nutrients,the combination of Potamogeton pectinatus and Myriophyllum showed the best removal effect of dissolved phosphorus nutrients in the water,while the combination of grate tooth eye and the fox tail algae showed the best removal effect of the dissolved CODMn.In a comprehensive view,the combination of the Fox tail algae+Ceratophyllum is the best for the removal of nutrients.