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[1]ZHOU Linfei,ZHONG Qian,WANG Hexiang,et al.Analysis on the Removal Efficiency of Eutrophic Materials in Shifosi Constructed Wetland[J].Research of Soil and Water Conservation,2015,22(06):312-316.

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Analysis on the Removal Efficiency of Eutrophic Materials in Shifosi Constructed Wetland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 06 Page number: 312-316 Column: Public date: 2015-12-28

Title:: Analysis on the Removal Efficiency of Eutrophic Materials in Shifosi Constructed Wetland

Author(s):: ZHOU Linfei¹, ZHONG Qian², WANG Hexiang³, ZHANG Jing¹; 1. College of Water Resources, Shenyang Agricultural University, Shenyang, Liaoning 110866, China;
2. Fushun Institute of Water Conservancy Survey and Design, Fushun, Liaoning 113000, China;
3. Water Supply Bureau of Liaoning Province, Shenyang 110003, China

Keywords:: Shifoshi constructed wetland; eutrophica substance; removal rate

CLC:: X52;X173

DOI:: -

Abstract:: We took the Shifosi constructed wetland as research site and examined the removal efficiency of eutrophic materials in this constructed wetland in Liao River by long-term monitoring of wetland water body eutrophic indexes. The result showed that the eutrophication condition of the water of the reservoir outlet was much better than that before the construction of the wetland since the construction of Shifoshi constructed wetland in 2009. Therein, the DO content increased obviously while the contents of organism COD_Mn, BOD₅ and nutrients(NH₃-N, TN and TP) decreased significantly. Liao River flows through the wetland and the change rate of DO content of the water body at some stages appeared negative but the DO content of the wetland outlets reached above 7.0 mg/L. Wetland has good removal efficiency of organism and nutrients, and the removal efficiency of flood season is better than that of non-flood season with the removal rate reaching positive value during the period from 2009 to 2011. The maximum removal rates of wetland on organism COD_Mn, and BOD₅ reached up to 48.3% and 65.8%, respectively, and maximum removal rates of nutrients such as NH₃-N, TN and TP reached up to 78.1%, 88.2% and 72.0%, respectively. The removal rates at some stages appeared negative in 2012 and 2013, which indicated that the decomposition of dead plants could lead to the secondary release of eutrophic matter with the extension of the runtime of wetland.

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