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http://dx.doi.org/10.11614/KSL.2013.46.1.116

The Effect of Floating Wetland on Water Quality Improvement in a Eutrophic Lake  

Park, Chae-Hong (Department of Environmental Science, Konkuk University)
Park, Myung-Hwan (Department of Environmental Science, Konkuk University)
Choi, Dong-Ho (KC RIVERTECH)
Choi, Hyung-Joo (KC RIVERTECH)
Lee, Joon-Heon (KC RIVERTECH)
Lee, Myung-Hoon (KC RIVERTECH)
Hwang, Soon-Jin (Department of Environmental Science, Konkuk University)
Publication Information
Korean Journal of Ecology and Environment / v.46, no.1, 2013 , pp. 116-127 More about this Journal
Abstract
At weekly intervals, we monitored continuous changes in water quality by constructed floating wetland equipped with the four different filter media (sponge, volcanic stone, activated carbon and magnesium hydroxide) in a eutrophic lake from March 2011 to May 2012. We also investigated phyto- and zooplankton communities both in the influent and the effluent water through the floating wetland. Over a 10-month time period, average turbidity (66%), suspended solids (79%) and chlorophyll-a (80%) concentrations were remarkably reduced in the effluent water compared to the influent (P<0.001). The average removal rates of $NO_2-N$ and $NH_3-N$ were 24% and 20%, respectively (P<0.05). The average removal rates of $NO_3-N$ and TN were less than 10% (P>0.05). On the other hand, the average removal rates of $PO_4-P$ and TP were more than 65% (P<0.01). Interestingly, the abundance of phytoplankton in the effluent was decreased about 2.6 times compared to that of the influent, whereas the abundance of zooplankton in the effluent was increased about 3.5 times compared to that of the influent. Overall, particulate matters (SS, Chl-a and TP) and dissolved nutrients ($NO_2-N$, $NH_3-N$ and $PO_4-P$) were particularly reduced at high rates. Therefore, application of our constructed floating wetland in a eutrophic lake improved the water quality and demonstrated a potential for algal bloom mitigation.
Keywords
floating wetland; water-purification; phytoplankton; zooplankton; monitoring;
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Times Cited By KSCI : 4  (Citation Analysis)
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