a Educational College of Medianeira , Medianeira , State of Paraná , Brazil.
b Center of Agrarian Sciences, Campus of Marechal Cândido Rondon , State University of Western Paraná , Marechal Cândido Rondon , State of Paraná , Brazil.
Int J Phytoremediation. 2019;21(7):714-723. doi: 10.1080/15226514.2018.1556591. Epub 2019 Jan 18.
This work aimed to evaluate the potential of phytoremediation using Pistia stratiotes as a plant for post-treatment of wastewater from domestic sewage. The experiment was conducted at Toledo-PR, Brazil, for 42 days, in a pilot scale model. In order to evaluate the efficiency of Pistia as a post-treatment of domestic sewage, parameters such temperature, pH, turbidity, total solids, COD, N and P contents were determined in the effluent, as well as the total contents of K, Ca, Mg, Cu, Zn, Fe, Mn, Cd, and Pb. The bioaccumulation of K, Ca, Mg, Cu, Zn, Fe, Mn, Cd, and Pb in the living tissues of P. stratiotes have also been detected. The results demonstrate efficiency removal of turbidity, N, P and COD of 98.5, 100, 100, and 79.18%, respectively. The effluent contents of nutrients and toxic metals fluctuated during the study. This can have occurred due to photosynthetic activities of microorganisms and the plant senescence. The evaluation of some parameters in the effluent, such as temperature, DO, and organic matter, influenced these facts. Low levels of DO were observed, in function to the physical barrier of macrophytes in water surface, preventing the entry of air and light. The use of P. stratiotes proved to be a good complement for post-treatment of wastewater from domestic sewage.
本研究旨在评估凤眼蓝（Pistia stratiotes）作为一种植物对生活污水进行后处理的潜力。该实验在巴西托莱多（Toledo-PR）进行，为期 42 天，采用中试规模模型。为了评估凤眼蓝作为生活污水后处理的效率，在出水处测定了温度、pH 值、浊度、总固体、COD、N 和 P 含量等参数，以及 K、Ca、Mg、Cu、Zn、Fe、Mn、Cd 和 Pb 的总量。还检测了活组织中 K、Ca、Mg、Cu、Zn、Fe、Mn、Cd 和 Pb 的生物积累情况。结果表明，浊度、N、P 和 COD 的去除效率分别为 98.5%、100%、100%和 79.18%。研究过程中，养分和有毒金属的出水含量波动。这可能是由于微生物和植物衰老的光合作用活动所致。一些出水参数（如温度、DO 和有机物）的评估也影响了这些因素。由于水生植物在水面形成物理屏障，阻止空气和光线进入，因此 DO 水平较低。事实证明，使用凤眼蓝作为生活污水的后处理是一种很好的补充。
