References

1. H.W. Paerl, H. Xu, M.J. McCarthy, G.W. Zhu, B.Q. Qin, Y.P. Li, W.S. Gardner, Controlling harmful cyanobacterial blooms in a hyper-eutrophic lake (Lake Taihu, China): the need for a dual nutrient (N & P) management strategy, Water Res., 45 (2011) 1973–1983.
2. J.C. Huang, Y.J. Zhang, G.B. Arhonditsis, J.F. Gao, Q.W. Chen, N.C. Wu, F.F. Dong, W.Q. Shi, How successful are the restoration efforts of China’s lakes and reservoirs?, Environ Int., 123 (2019) 96–103.
3. L.E. Christianson, A. Bhandari, M.J. Hailers, A practice-oriented review of woodchip bioreactors for subsurface agricultural drainage, Appl. Eng. Agric., 28 (2012) 861–874.
4. J.H. Zhao, Y.Q. Zhao, Z.H. Xu, L. Doherty, R.B. Liu, Highway runoff treatment by hybrid adsorptive media-baffled subsurface flow constructed wetland, Ecol. Eng., 91 (2016) 231–239.
5. X. Alvarez, E. Valero, R.M.B. Santos, S.G.P. Varandas, L.F.S. Fernandes, F.A.L. Pacheco, Anthropogenic nutrients and eutrophication in multiple land use watersheds: best management practices and policies for the protection of water resources, Land Use Policy, 69 (2017) 1–11.
6. H.M. Wu, J.A. Zhang, P.Z. Li, J.Y. Zhang, H.J. Xie, B. Zhang, Nutrient removal in constructed microcosm wetlands for treating polluted river water in northern China, Ecol. Eng., 37 (2011) 560–568.
7. Y.F. Xu, Y.H. Liu, W. Zhang, Z.Z. Wang, S.M. Li, Optimization of C/N and carbon types on the denitrification biofilter for advanced wastewater treatment, Desal. Wat. Treat., 119 (2018) 107–117.
8. Z.B. Yao, C.L. Wang, N. Song, H.L. Jiang, Development of a hybrid biofilm reactor for nitrate removal from surface water with macrophyte residues as carbon substrate, Ecol. Eng., 128 (2019) 1–8.
9. H.M. Wu, J. Zhang, H.H. Ngo, W.S. Guo, Z. Hu, S. Liang, J.L. Fan, H. Liu, A review on the sustainability of constructed wetlands for wastewater treatment: design and operation, Bioresour. Technol., 175 (2015) 594–601.
10. M.H. Liu, S.B. Wu, L. Chen, R.J. Dong, How substrate influences nitrogen transformations in tidal flow constructed wetlands treating high ammonium wastewater?, Ecol. Eng., 73 (2014) 478–486.
11. Y. Liu, X.H. Liu, K. Li, S.Y. Lu, X.C. Guo, J. Zhang, B.D. Xi, Removal of nitrogen from low pollution water by long-term operation of an integrated vertical-flow constructed wetland: performance and mechanism, Sci. Total Environ., 652 (2019) 977–988.
12. L. Sidek, H.A. Mohiyaden, L.K. Lee, K.Y. Foo, Potential of engineered biomedia for the innovative purification of contaminated river water, Desal. Wat. Treat., 57 (2016) 24210–24221.
13. J. Li, Z. Hu, F. Li, J. Fan, J. Zhang, F. Li, Effect of oxygen supply strategy on nitrogen removal of biochar-based vertical subsurface flow constructed wetland: intermittent aeration and tidal flow, Chemosphere, 223 (2019) 366–374.
14. J.J. Chang, S.J. Deng, W. Jia, P. Chen, Y. Wang, J.Q. Chen, Nitrogen removal performance and enzyme activities of baffled subsurface-flow constructed wetlands with macrophyte biomass addition, Water Air Soil Pollut., 229 (2018) 182.
15. Z.H. Si, X.S. Song, Y.H. Wang, X. Cao, Y.F. Zhao, B.D. Wang, Y. Chen, A. Arefe, Intensified heterotrophic denitrification in constructed wetlands using four solid carbon sources: denitrification efficiency and bacterial community structure, Bioresour. Technol., 267 (2018) 416–425.
16. L.X. Jia, E.F. Gou, H. Liu, S.Y. Lu, S.B. Wu, H.M. Wu, Exploring utilization of recycled agricultural biomass in constructed wetlands: characterization of the driving force for high-rate nitrogen removal, Environ. Sci. Technol., 53 (2019) 1258–1268.
17. J.J. Chang, J. Mei, W. Jia, J.Q. Chen, X. Li, B.H. Ji, H.M. Wu, Treatment of heavily polluted river water by tidal-operated biofilters with organic/inorganic media: evaluation of performance and bacterial community, Bioresour. Technol., 279 (2019) 34–42.
18. C.C. Zhang, Q. Yin, Y. Wen, W.R. Guo, C. Liu, Q. Zhou, Enhanced nitrate removal in self-supplying carbon source constructed wetlands treating secondary effluent: the roles of plants and plant fermentation broth, Ecol. Eng., 91 (2016) 310–316.
19. M. Li, H.M. Wu, J. Zhang, H.H. Ngo, W.S. Guo, Q. Kong, Nitrogen removal and nitrous oxide emission in surface flow constructed wetlands for treating sewage treatment plant effluent: effect of C/N ratios, Bioresour. Technol., 240 (2017) 157–164.
20. State Environmental Protection Administration of China, Standard methods for water and wastewater monitoring and analysis, 4th ed, China Environmental Science Press, Beijing (In Chinese), (2002).
21. J. Vymazal, Constructed wetlands for wastewater treatment: Five decades of experience, Environ. Sci. Technol., 45 (2011) 61–69.
22. J.J. Chang, K. Liang, S.Q. Wu, S.H. Zhang, W. Liang, Comparative evaluations of organic matters and nitrogen removal capacities of integrated vertical-flow constructed wetlands: domestic and nitrified wastewater treatment, J. Environ. Sci. Health A, 50 (2015) 757–766.
23. S. Kizito, T. Lv, S.B. Wu, Z. Ajmal, H.Z. Luo, R.J. Dong, Treatment of anaerobic digested effluent in biochar-packed vertical flow constructed wetland columns: role of media and tidal operation, Sci. Total Environ., 592 (2017) 197–205.
24. C. Vohla, M. Koiv, H.J. Bavor, F. Chazarenc, U. Mander, Filter materials for phosphorus removal from wastewater in treatment wetlands-a review, Ecol Eng., 37 (2011) 70–89.
25. Z.S. Liu, Y. Zhang, B.Y. Liu, L. Zeng, D. Xu, F. He, L.W. Kong, Q.H. Zhou, Z.B. Wu, Adsorption performance of modified bentonite granular (MBG) on sediment phosphorus in all fractions in the West Lake, Hangzhou, China, Ecol. Eng., 106 (2017) 124–131.
26. Y.W. Su, W.Z. Zhang, F. Xu, W.W. Chen, Natural volcanic tephra for phosphate removal from rural micro-polluted wastewater, Water Air Soil Pollut., 226 (2015) 2258.
27. T. Saeed, G.Z. Sun, A review on nitrogen and organics removal mechanisms in subsurface flow constructed wetlands: dependency on environmental parameters, operating conditions and supporting media, J. Environ. Manage., 112 (2012) 429–448.
28. J.J. Chang, S.Q. Wu, Y.R. Dai, W. Liang, Z.B. Wu, Nitrogen removal from nitrate-laden wastewater by integrated verticalflow constructed wetland systems, Ecol. Eng., 58 (2013) 192–201.
29. J.L. Wang, L.B. Chu, Biological nitrate removal from water and wastewater by solid-phase denitrification process, Biotechnol. Adv., 34 (2016) 1103–1112.
30. S.G. Cameron, L.A. Schipper, Nitrate removal and hydraulic performance of organic carbon for use in denitrification beds, Ecol. Eng., 36 (2010) 1588–1595.
31. H. Li, Z.F. Chi, B.X. Yan, L. Cheng, J.Z. Li, An innovative woodchip- framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater, J. Environ. Sci., 51 (2017) 275–283.