Nitrate is one of the most toxic and pathogenic substances in drinking water. Nitrate levels have increased significantly in groundwater and surface water because of the high usage of nitrogenous fertilizers, which have lethal effects on human health. Therefore, the removal of this toxic material from surface water is absolutely essential. The goal of this paper is to evaluate the efficiency of three aquatic plant species, called Cyperus alternifolius, Typha latifolia, and Juncus inflexus, in the removal of nitrate from surface water. This experiment has been carried out in the laboratory scale using a hydroponics method. To do this, the water samples containing nitrate were collected and evaluated before and after the treatment to see the effects of these three plants on both the nitrate removal and the pH variation of water. The results show that all the plants can remove excessive levels of nitrate from the surface water. The comparison of the results has revealed that T. latifolia plant has higher ability to remove nitrate from water than C. alternifolius and J. inflexus. It was observed that the nitrate removal efficiency of T. latifolia was 95%, J. inflexus was 85%, and C. alternifolius was 70% after 10 days. Moreover, it was observed that the pH values of the treated water have been affected by these plants. The results of this study can be employed for further improvement of surface water quality, thereby lowering water purification time and costs as well as decreasing the nitrate-related diseases significantly.

硝酸盐是饮用水中毒性最强、致病性最强的物质之一。由于氮肥的大量使用，地下水和地表水中的硝酸盐含量显着增加，这对人类健康具有致命影响。因此，从地表水中去除这种有毒物质是绝对必要的。本文的目的是评估三种水生植物物种的效率，称为互叶香附、香蒲和蒺藜。, 从地表水中去除硝酸盐。该实验是使用水培方法在实验室规模进行的。为此，在处理前后收集并评估了含有硝酸盐的水样，以观察这三种植物对硝酸盐去除和水 pH 值变化的影响。结果表明，所有植物都可以去除地表水中过量的硝酸盐。结果的比较表明，阔叶槭植物对水中硝酸盐的去除能力高于互叶桤木和蒺藜。观察到，阔叶草对硝酸盐的去除率为 95%，扁豆为 85%，并且C. alternifolius在 10 天后为 70%。此外，还观察到处理过的水的 pH 值受到这些植物的影响。本研究结果可用于进一步改善地表水水质，从而降低水净化时间和成本，并显着减少硝酸盐相关疾病。