Effects of different aquatic plants on eutrophic water purification and greenhouse gas emission
Water eutrophication and greenhouse effect are currently serious environmental issues.Previous purifying eutrophic water by aquatic plants mainly focused on the purification effect of aquatic plants,and seldom studied the characteristics of greenhouse gases(GHG)emissions in the purification process.Especially,collaborative governance of pollution reduction and carbon abatement was ignored.Artificial simulation of eutrophication water was used in an outdoor environment by adding nitrogen and phosphorus.Five phytoremediation treatments were set up with common aquatic plants,namely Phyllostachys heteroclada Oliver,Potamogeton wrightii Morong,Hydrilla verticillate(L.F.)Royle,Hydrocotyle vulgaris L,Cyperus papyrus Linn,and Ludwigia peploides subsp.stipulacea(Ohwi)Raven.One treatment was also set up without aquatic plants.Purification effect and the characteristics of GHG emissions(including CO2,CH4 and N2O)were studied in the purification of eutrophic water by different aquatic plants.The results showed that:eutrophic water for each phytoremediation treatment had been completely purified on the 15th day of purification.The minimum net CO2,CH4 and N2O emission fluxes at the water-air interface was-44.09,0.07 and 0.49 mg/(m2·h)in the treatment of Hydrocotyle vulgaris L on the 15th purifying day,with the minimum global warming potential(GWP)at the water-air interface of 38 906.89 mg/m2.It should be noted when aquatic plants were selected to purify eutrophic water,the treatment of Hydrocotyle vulgaris L had a good effect on collaborative governance of pollution reduction and carbon abatement.
万方数据
维普
