10种湿地植物对不同程度模拟污染水体的净化效果研究

Purification effects of 10 wetland plants on simulated contaminated water of different degrees

选取美人蕉、紫芋、黄菖蒲、千屈菜、再力花、花叶芦竹、石菖蒲、水芹、苦草、萍蓬草等10种湿地植物作为研究材料,人工模拟低、中、高浓度的污染水体,研究10种湿地植物对COD和NH_(4)^(+)N的去除能力,以及不同污染程度水体pH值的变化。结果表明:通过30 d的试验,整个试验期间污染水体pH值均无显著差异,表明水体环境趋于稳定,水芹和花叶芦竹对COD的去除效果最好,萍蓬草和紫芋对NH_(4)^(+)N的去除效果最优。

In this study,10 wetland plants were selected as materials,including Canna indica,Colocasia antiquorum,Iris pseudacorus,Lythrum salicaria,Thalia dealbata,Arundo donax,Acorus calamus,Oenanthe javanica,Vallisneria natans and Nuphar pumila.Three contaminated waters of different degrees ranging from low to high were artificially stimulated.To assess the effects of these plants on polluted waters,the removal capacity of 10 wetland plants for COD and NH_(4)^(+)N were studied,as well the dynamic change of pH value.The results showed that:through the 30-days test,the pH value of contaminated waters had no obvious changes,suggesting that the water environment was relatively stable.O.javanica and A.donax had best effects to remove COD.For the removal of NH_(4)^(+)N,N.pumila and C.antiquorum were the best.