改性蛭石对富营养化水体深度除磷的试验研究

利用膨胀蛭石具有的强吸附性和阳离子交换能力,对其进行不同方法的改性,并考察了不同改性蛭石对磷的吸附效果。采用室内盆栽试验的方法,研究改性蛭石对富营养化水体中磷的富集效果,初步探讨利用蛭石吸附结合植物吸收来去除富营养化水体中磷的可行性。静态吸附实验表明,各改性蛭石的除磷效果为：镧改性蛭石〉酸改性蛭石〉铁改性蛭石〉原蛭石。以有无植物的盆栽试验对比发现,植物对磷的吸收作用在一定程度上可以促进改性蛭石对水体中磷的吸附。

Research of Advanced Dephosphorization From Eutrophic Water by Modified Vermiculite

Expanded vermiculite, which had a good absorption property and cation exchange capacity, was modified by different methods, and then used as the adsorbent to investigate its adsorption capacity for phosphate （PO4-P） from the aqueous solution. The effect of TP in eutrophic water absorbed by modified vermiculite was studied through indoor pot experiment, and the feasibility of vermiculite adsorption combined with plant absorption to remove phosphorus in the eutrophic water was preliminary discussed. Static adsorption results indicated that the effect of phosphorus adsorption for the modified vermiculites was： La3＋〉H＋〉Fe3＋〉raw vermiculite. The pots with plants have a better efficiency of phosphorus removal than those pots without plants.