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《Environmental Science & Technology》 2010-09
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Effect of Periphytic Algae on Phosphorus Concentration in Lake Water

ZHANG Qiang1,2,LIU Zheng-wen1 (1. State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China; 2. Graduate University Chinese Academy of Sciences,Beijing 100049,China)  
The effects of periphytic algae on phosphorus concentration in lake water was investigated by establishing periphytic algal communities using polyethylene nets as artificial substrates in experimental tanks. Three treatments including control group (CG) with no polyethylene nets and treatment groups with 8.48mm mesh size nets (large-mesh-size group,LMSG) and 2.83mm mesh size nets (small -mesh -size group,SMSG),respectively,were set up,and all treatments had a phosphorus loading of 5mg/m3·d. Results showed that the value of periphytic algal biomass of SMSG was 6.23μg/cm2 on average while LMSG with the value of 5.93μg/cm2,although the value of SMSG was higher than that of LMSG,the difference was not significant. Concentration of total phosphorus,total soluble phosphorus,soluble active phosphorus and partical phosphorus in both treatment groups were reduced by more than 37% compared with that in the CG. Phytoplanktonic algae in both LMSG and SMSG were more than 64% lower than that in the CG,but the difference between LMSG and SMSG was not significant. It was demonstrated that establishing periphytic algae using polyethylene nets as artificial substrates can effectively reduce the phosphorus concentration in lake water.
【Fund】: 国家高新技术研究与发展(863)项目(2006AA06Z337)
【CateGory Index】: X524
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