Author(s): Jie Gao; Yaoping Chen; Lina Zhang
Linked Author(s):
Keywords: Coal-mining subsidence ecological floating wetlands water purification
Abstract: Large-scale coal mining has caused serious damage to the ecological environment of mining areas, especially water pollution caused by subsidence due to coal mining. Traditional floating island wetland (FIW) use the synergistic action of microorganisms and plants to improve water quality through multiple mechanisms and have landscape value. However, it is limited by various factors and the removal efficiency is unstable; for example, the plants undergo seasonal decay and the length of the root system is limited, which prevents them from achieving the expected results. In order to improve the purification ability of traditional FIW under different conditions and to develop FIW with better performance, we used three different configurations of FIWs, set up high and low concentration situations and high and low temperatures (1°C-15°C) to compare the purification performance of various combinations under different conditions. It was concluded that among the operational performance of the three floating island wetlands under different situations, the use of artificial fibre packing significantly improved the removal efficiency of BOD5, TP and TN, while the addition of an aeration system further improved the BOD5 removal and water purification efficiency.
Year: 2025