Volume 9 Issue 2
Mar.  2019
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Article Navigation >  Journal of Environmental Engineering Technology  > 2019  >  9(2): 167-174
SONG Xueyan, MA Lan, ZHAO Haixi, TU Qi, LU Yifeng, LU Shaoyong. Purification effect and stability of water quality of different functional units in Laoyuhe Wetland Park of Dianchi Lake[J]. Journal of Environmental Engineering Technology, 2019, 9(2): 167-174. doi: 10.12153/j.issn.1674-991X.2019.01.030
Citation: SONG Xueyan, MA Lan, ZHAO Haixi, TU Qi, LU Yifeng, LU Shaoyong. Purification effect and stability of water quality of different functional units in Laoyuhe Wetland Park of Dianchi Lake[J]. Journal of Environmental Engineering Technology, 2019, 9(2): 167-174. doi: 10.12153/j.issn.1674-991X.2019.01.030
shu

Purification effect and stability of water quality of different functional units in Laoyuhe Wetland Park of Dianchi Lake

doi: 10.12153/j.issn.1674-991X.2019.01.030

  • 1. School of Ecology and Environment Sciences, Yunnan University, Kunming 650091, China

  • 2. Yunnan Academy of Science and Technology Development, Kunming 650051, China

  • 3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • Received Date: 2018-08-29
  • Publish Date: 2019-03-20
    Abstract
  • Taking Laoyuhe Wetland Park (WPlyh) in Dianchi Lake as the research object, sampling points were set up in different functional units of the wetland to analyze the removal effects of CODCr, N H 4 + -N and TP by different functional units in the testing operating period from April 15 th, 2015 to May 14 th, 2015. Sampling points were also set up at the inlet and outlet of wetlands and the long term operation effects in the period from April, 2015 to March, 2017 were monitored and analyzed. It revealed that during the WPlyh test run, the CODCr, N H 4 + -N and TP concentrations in the outlet were significantly lower than those in the inlet, with the removal rates of 40.07%, 48.48% and 40.38%, respectively, while the treatment effect was still unstable. Among the functional units, the surface flow wetland at the entrance of the lake had the best removal effect on CODCr with removal rate of 10.36%, the front part of the inter-forest shallow-water wetland had the best removal effect on N H 4 + -N with the removal rate of 17.59%, and the back part of the inter-forest shallow-water wetland had the best removal effect on TP with the removal rate of 9.44%. It means that the decontamination rate of the inter-forest shallow-water wetland accounted for 53.15% of WPlyh total decontamination rate, which could be regarded as the best purification unit in the wetland parks. WPlyh's monthly reductions and removal rates for CODCr, N H 4 + -N, and TP during long term operation and the removal rates of the three characteristic pollutants showed a downward trend with time. Especially after one year of operation, the downward trend was most obvious.

     

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