Liang Yinxiu, Zhu Hui, Bañuelos Gary, Yan Baixing, Shutes Brian, Cheng Xianwei, Chen Xin
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, PR China.
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, PR China.
Chemosphere. 2017 Nov;187:52-61. doi: 10.1016/j.chemosphere.2017.08.087. Epub 2017 Aug 18.
This study aims to evaluate how plant species, influent loads and salinity levels affect the removal of nutrients from saline wastewater using constructed wetlands (CWs). CWs planted with Canna indica showed the greatest removal percentages among the four tested species for nitrogen (N) (∼100%) at both low and high influent loads, and ∼100% and 93.8% for phosphorus (P) at low and high influent loads, respectively at an electrical conductivity (EC) of 7 mS/cm (25 °C). The influence of different salinity levels on plant assimilation of N and P varied with their respective concentrations; salinity (e.g., EC at 7, 10 and 15 mS/cm) even enhanced plant absorption of N and P under specific conditions. In conclusion, CWs planted with selected species can be used for the removal of N and P under a range of different salinity levels (e.g., EC at 7, 10 and 15 mS/cm, 25 °C).
本研究旨在评估植物种类、进水负荷和盐度水平如何影响人工湿地（CWs）对含盐废水中营养物质的去除效果。在两种进水负荷条件下，种植美人蕉的人工湿地对氮（N）的去除率在四种受试植物中最高（约100%），在进水负荷低和高时，对磷（P）的去除率分别约为100%和93.8%，此时电导率（EC）为7 mS/cm（25°C）。不同盐度水平对植物氮磷同化的影响随各自浓度而变化；在特定条件下，盐度（如EC为7、10和15 mS/cm）甚至会增强植物对氮和磷的吸收。总之，种植特定植物种类的人工湿地可用于在一系列不同盐度水平（如EC为7、10和15 mS/cm，25°C）下去除氮和磷。
