5种水生植物脱氮除磷能力比较

Comparison of Nitrogen and Phosphorus Removal Capability of Five Aquatic Plants

采用室内静态水培的方法测试了5种高等水生植物对人工配置污水的净化能力,旨在筛选适宜的湿地植物。结果表明：有植物处理系统总氮和总磷的去除效果明显高于无植物对照,植物本身的氮、磷累积作用对氮的去除贡献为23%-81%,磷的去除贡献为56%-88%。多数测试植物对氮、磷的富集量以茎叶高于根系。不同植物的净化能力具较大差异,从强到弱的顺序依次为千屈菜〉菖蒲〉雨久花〉泽泻〉慈姑。

Capabilities of 5high aquatic plants to remove nitrogen and phosphorus were compared in the manipulative indoor experiment.The treatment system with hydrophytes had a higher removal efficiency to total nitrogen（TN）and total phosphorus（TP）than that without hydrophytes.The removal contribution rates from plant accumulation to nitrogen and phosphorus were 23%-81%,56%-88%,respectively.Nitrogen and phosphorus accumulations in stems and leaves were higher than those in roots of most tested hydrophytes.The comprehensive evaluation results indicated that,according to plant purification ability to the contamination,the order was Lythrusalicari〉Alisma calamus〉Monochoria korsakowii〉Acorus plantago-aquatica〉Sagittaria sagittifolia.