Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, Southwest University of Science and Technology, Mianyang, 621010, China.
Agricultural Products Quality Safety Inspection and Testing Center, Mianyang, 621010, China.
Environ Sci Pollut Res Int. 2021 Aug;28(30):41169-41180. doi: 10.1007/s11356-021-13555-9. Epub 2021 Mar 29.
Natural manganese ore (NM) is selected as a distinguished constructed wetland (CW) substrate for nutrient pollutants removal, however, the study on municipal wastewater treatment plant (WWTP) effluent treatment remains scarce. The current study was to investigate the sorption characteristics of NM and the removal efficiency of ammonium and phosphorus from one WWTP effluent in a simulated vertical flow NM constructed wetland (NM-VFCW). Results indicated that NM could effectively sorb ammonium and phosphorus within 24 h, and the desorption ratio was less than 7%. The sorption of ammonium and phosphorus enhanced when increasing the particle size of NM, but was not sensitive with temperature. The removal efficiencies for ammonium and phosphorus were 65% and 76% in NM-VFCW, which were 61% and 31% in gravel VFCW. The much higher removal efficiency for phosphorus was mainly attributed to the precipitation of phosphorus which was identified by the SEM and EDS spectrum. Therefore, the manganese ore sand is highlighted as a powerful substrate for simultaneous advanced removal of phosphorus and ammonium in constructed wetland systems.
天然锰矿（NM）被选为一种卓越的人工湿地（CW）基质，用于去除营养污染物，但对于城市污水处理厂（WWTP）出水的处理研究仍然很少。本研究旨在探讨 NM 的吸附特性以及模拟垂直流 NM 人工湿地（NM-VFCW）中从一个 WWTP 出水中去除铵和磷的效率。结果表明，NM 在 24 小时内可以有效地吸附铵和磷，解吸率小于 7%。随着 NM 粒径的增加，铵和磷的吸附增强，但对温度不敏感。在 NM-VFCW 中，对铵和磷的去除效率分别为 65%和 76%，在砾石 VFCW 中分别为 61%和 31%。磷的去除效率高得多，主要归因于磷的沉淀，这是通过 SEM 和 EDS 谱识别出来的。因此，锰矿砂是人工湿地系统中同时深度去除磷和铵的有力基质。
