Comparison of purification effect of four submerged plants on eutrophic water
In order to explore the pollution control of submerged plants on water body in the whole life cycle process,four submerged plants,which are commonly used in water ecological restoration,such as Myrio-phyllum spicatum,Ceratophyllum demersum,Vallisneria spiralis and Hydrilla verticillata,were started,and the purification effects of natural submerged plants on TN,TP and CODMn in the whole life cycle process were simulated in the laboratory.The community structure of sediment microorganism was ana-lyzed and compared with the results of field ecological enclosure experiment to further evaluate the decon-tamination ability.The results showed that all the four submerged plants had the ability to remove TN,TP and CODMn in the water,which improved the water quality.The same submerged plants had different puri-fication effects on the water under indoor simulation conditions and in the field environment.The sediment microorganisms of submerged plants in each group had diversity and abundance,and Proteobacteria was the most important microorganism,which was related to the removal of TN.Based on multiple indicators,it was found that the performance of Ceratophyllum demersum was strong in the laboratory test and could be used as the preferred species for the restoration of medium and low eutrophication water bodies,and the performance of Hydrilla verticillata was strong in the field enclosure experiment and could be used as the preferred species for the restoration of medium and high eutrophication water bodies.The experiment can provide reference for guiding water ecological design.
万方数据
维普
