利用水上种植技术治理湖泊富营养化已被证明是一种行之有效的方法，而提高作物产量一直是阻碍该技术普及的一个难点。利用膨胀蛭石具有的强吸附性和阳离子交换能力，采用室内试验的方法，研究膨胀蛭石对富营养化水体中氮磷物质的富集效果。结果表明：当富营养化水体中的总磷和总氮浓度分别为0.5mg/L和5mg/L时，经过蛭石8h的富集后，吸附基本达到平衡，水体中总磷和总氮的去除率可达78%和30%，而蛭石压滤液中总磷和总氮的浓度分别约是水体中总磷和总氮浓度的4和3倍。

It is confirmed as an effective approach to manage eutrophicated lake by planting in water technology, but the popularization of the technology is difficult because of lower crop yield. By indoor experiment , the paper studied the effect of TN,TP in eutrophic water absorbed by expanded vermiculite, which has a better absorption property and cation exchange capacity. Results indicated as follows: Expanded vermiculite has a better absorption capability to TN, TP in eutrophic water；when TN and TP concentration in eutrophic water is 0.5 mg/L and 5 mg/L, absorption equilibrium is obtained basically after 8h；the removal ratio of TN, TP in eutrophic water is 76% and 30% respectively after 32h; however, TN and TP concentration in vermiculite leachate is four times and three times than those in eutrophic water.