Abstract
The slightly polluted source water of Yellow River was pretreated in a horizontal subsurface flow constructed wetland (HSFCW) and a lateral subsurface flow constructed wetland (LSFCW) in the Ji’nan city Reservoir, Shandong, China. During almost one years run, the results showed that at the hydraulic loading rate of 1 m/day, the removal efficiencies of chemical oxygen demand (COD), total nitrogen (TN), ammonium nitrogen (NH4 +-N) and total phosphorus (TP) in the HSFCW were 48.9, 51.4, 48.7 and 48.9 %, respectively, and the corresponding removal efficiencies in the LSFCW were 50.51, 53.12, 50.44 and 50.83 %, respectively. The HSFCW and LSFCW had a similar high potential for nutrients removal and LSFCW was slightly better. According to the China standard for surface water resources (GB3838-2002), mean effluent COD can reach the Class I (≤15 mg/L), and NH4 +-N and TP and TN can reach nearly the Class I (≤0.015 mg/L), the Class III (≤0.05 mg/L) and the Class IV (≤1.5 mg/L), respectively. It can be concluded that the slightly polluted source water from Reservoir was pretreated well by the constructed wetland.
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Acknowledgments
The authors would like to thank Ms. Chen Hong of Ji’nan city Reservoir, for their helps with field sampling and investigation. This work was financially supported by the National Natural Science Foundation of China (Nos. 41371072 and 41071332), Heilongjiang National Science Fund for Young Scholars (No. QC2009C70) and the Program for Young Academic Backbone of Harbin Normal University (No. 10KXQ-08).
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The authors declare that they have no conflict of interest.
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Yang, X., Zhang, X., Wang, J. et al. Performance of the subsurface flow constructed wetlands for pretreatment of slightly polluted source water. Ecotoxicology 23, 699–706 (2014). https://doi.org/10.1007/s10646-014-1197-7
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DOI: https://doi.org/10.1007/s10646-014-1197-7