The rapid growth of industries has resulted in wastewater generation containing different organic and chemical substances channeled into the water body. This causes the arising of water pollution issues in many regions. The phytoremediation method was introduced in the process of treating water pollution as it is low cost and environmentally friendly. Lemna minor, Salvinia minima, Ipomoea aquatica and Centella asiatica were chosen in this study because they have tolerance to various pollution conditions and are able to remove organic pollutants and heavy metals. The objectives of this study were to determine the water quality before and after treatment, to determine the rate of reduction in total suspended solids (TSS), ammoniacal nitrogen (NH₃-N), and chemical oxygen demand (COD) in sewage water through the phytoremediation method and to assess the effectiveness of the plants in the phytoremediation of sewage wastewater. It was found that, Lemna minor, Salvinia minima, Ipomoea aquatica and Centella asiatica were able to reduce TSS by 50.8%, 77.6%, 85.6% and 67.6%, respectively; NH₃-N by 80.4%, 89.9, 97.3% and 79.1%, respectively; and COD by 75%, 82%, 44.8% and 36.46%, respectively. In this study, it was found that sewage wastewater treatment using Ipomoea aquatica was more efficient in reducing NH₃-N and Salvinia minima was more efficient in reducing TSS and COD values.

中文翻译：

---

小Lemna L.，Salvinia minima，Ipomea aquatica和Centella asiatica对污水中TSS，NH3-N和COD的植物修复

工业的快速发展导致废水产生，其中含有不同的有机和化学物质，这些废水被排放到水体中。这导致许多地区出现水污染问题。由于植物修复方法成本低廉，环境友好，因此被引入到水污染治理过程中。小Lemna，最小的Salvinia，水生的Ipomoea和积雪的Centella之所以选择本研究，是因为它们对各种污染条件具有耐受力，并且能够去除有机污染物和重金属。这项研究的目的是确定处理前后的水质，确定污水中总悬浮固体（TSS），氨氮（NH ₃ -N）和化学需氧量（COD）的减少率。植物修复方法，并评估植物在污水废水植物修复中的有效性。研究发现，小Lemna，最小的Salvinia，水生的Ipomoea和积雪的Centella asiatica的TSS分别降低了50.8％，77.6％，85.6％和67.6％。NH ₃-N分别增加80.4％，89.9、97.3％和79.1％；和化学需氧量分别下降了75％，82％，44.8％和36.46％。在这项研究中，发现使用水生番薯属的污水处理在减少NH ₃ -N方面更有效，而Salvinia minima在减少TSS和COD方面更有效。