Jhonson Poovarasu, Goh Hui Weng, Chan Derek Juinn Chieh, Juiani Siti Fairuz, Zakaria Nor Azazi
River Engineering and Urban Drainage Research Centre (REDAC), Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300, Penang, Malaysia.
School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300, Penang, Malaysia.
Environ Sci Pollut Res Int. 2023 Feb;30(9):24562-24574. doi: 10.1007/s11356-022-23605-5. Epub 2022 Nov 7.
Bioretention systems are among the most popular stormwater best management practices (BMPs) for urban runoff treatment. Studies on plant performance using bioretention systems have been conducted, especially in developed countries with a temperate climate, such as the USA and Australia. However, these results might not be applicable in developing countries with tropical climates due to the different rainfall regimes and the strength of runoff pollutants. Thus, this study focuses on the performance of tropical plants in treating urban runoff polluted with greywater using a bioretention system. Ten different tropical plant species were triplicated and planted in 30 mesocosms with two control mesocosms without vegetation. One-way ANOVA was used to analyze the performance of plants, which were then ranked based on their performance in removing pollutants using the total score obtained for each water quality test. Results showed that vetiver topped the table with 86.4% of total nitrogen (TN) removal, 93.5% of total phosphorus (TP) removal, 89.8% of biological oxygen demand (BOD) removal, 90% of total suspended solids (TSS) removal, and 92.5% of chemical oxygen demand (COD) removal followed by blue porterweed, Hibiscus, golden trumpet, and tall sedge which can be recommended to be employed in future bioretention studies.
生物滞留系统是城市径流处理中最受欢迎的雨水最佳管理实践（BMPs）之一。针对使用生物滞留系统的植物性能开展了相关研究，尤其是在美国和澳大利亚等气候温和的发达国家。然而，由于降雨模式和径流污染物强度不同，这些研究结果可能不适用于热带气候的发展中国家。因此，本研究聚焦于热带植物在利用生物滞留系统处理受中水污染的城市径流方面的性能。十种不同的热带植物品种进行了三次重复试验，并种植在30个中型生态系统中，另有两个无植被的对照中型生态系统。采用单因素方差分析来分析植物的性能，然后根据每次水质测试获得的总分，依据植物去除污染物的性能进行排名。结果显示，香根草在总氮（TN）去除率达86.4%、总磷（TP）去除率达93.5%、生物需氧量（BOD）去除率达89.8%、总悬浮固体（TSS）去除率达90%以及化学需氧量（COD）去除率达92.5%方面位居榜首，其次是蓝花草、木槿、金喇叭和高莎草，这些植物可推荐用于未来的生物滞留研究。
