Purifying Urban River Waters with Floating Bed Systems

Abstract:

The remediation effects of a real urban river water body was studied using four floating bed systems, in which Caldesia parnassifolias, Sagittaria sagittifolia, Cyperus alternifolius, Ipomoea aquatica Forsk. were planted. A compared system without plant was also carried out. The results showed that all the 4 planted floating systems had obvious removal rates of TN and TP. After 7 days, both the TN and TP were removed speedily in the C. parnassifolias system and their levels were below “environmental surface water quality standards” class II, for which the concentration of TN and TP were 0.5 mg/L and 0.1 mg/L respectively. However, concentrations of TN and TP changed little in control. Further, TN and TP contents in the plants increase gradually, while TN and TP in the water reducing, because the nitrogen and phosphorus were necessary elements for plant growth. This research showed that building floating bed systems to purify water was effective. Since the effect of C. parnassifolias was significant and C. alternifolius has remarkable low temperature adaptability, they were more fitting for building the floating bed systems for urban river remediation.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1084-1088
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1084
• Online since: February 2013
• Authors: Hua Zhang, Yi Wang, Kun Bai Chen
• Keywords: Floating Bed, Phytoremediation, Urban River

References

[1] Chinese Ministry of Environmental Protection of the 2010 State of the Environment in China [R] Beijing: China's Ministry of Environmental Protection, (2010).

[2] Wang G X, Pu P M. Influence of some artificial controls on eutrophic algal population dynamics. Environmental Science 1999, 20(2): 71-74 (in Chinese).

[3] Zhu L. Nitrogen and phosphorus of water nutrition source control countermeasures. Water Supply and Drainage 1998, 24(1): 23-25 (in Chinese).

[4] Lu K H, Yao L Y, Zhou S Q, Li M Z. Population variation of phytoplankton in West Lake of Hangzhou before and after diluting sewages with empting into river water and effect of controlling eutrophication. Chinese Journal of applied ecology 1992, 3(3): 266-272 (in Chinese).

[5] Jia H F, Cheng T S, Ding J H, Li J F. Relationship between eutrophication control and reservoir operation. Environmental Science 2001, 22(4): 104-107 (in Chinese).

[6] Lu K G, Yang W J, Su S A. Environmental and ecological engineering on control and remediation of eutrophicated water bodies: by using ameliorated alum plasma and fishes to control blue-green blooms of qiaodun reservoir. Acta Scientiae Circumstantiae 2002, 22(6): 732-737.

[7] Huett D O, Morris S G, Smith G, Hunt N. Nitrogen and phosphorus removal from plant nursery runoff in vegetated and unvegetated subsurface flow wetlands 2005. Water Research, 39: 3259–3272.

DOI: 10.1016/j.watres.2005.05.038

[8] Yang Z F, Zheng S K, Chen J J, Sun M. Puri fication of nitrate-rich agricultural run off by a hydroponic system Bioresource Technology 2008., 99(17): 8049–8053.

DOI: 10.1016/j.biortech.2008.03.040

[9] Wang C, Zhang W M, Wang P F, etc. Removal of Nitrogen and Phosphorus in Eutrophic Water by Jussiaea stipulacea Ohwi. Environmental Science 2007, 28(5): 975-981 (in Chinese).

[10] Liang X, LI X P. Treatment of polluted urban river water using filamentous green algae. Environmental Science 2008, 29(1): 52-56 (in Chinese).

[11] Zhao F L, Xi S, Yang X, Yang W D, Li J J, Gu B H, He Z L. Purifying eutrophic river waters with integrated floating island systems 2012. Ecological Engineering 40: 53-60.

DOI: 10.1016/j.ecoleng.2011.12.012

[12] Chinese environmental protection departments, Water and wastewater monitoring methods (The fourth edition), Beijing, China Environmental Science Press, (2002).

[13] Lu R K editor. The soil agricultural chemical analysis methods, Beijing: China Agricultural Science and Technology Press, (2000).

[14] Wu J Q, Huang S F, Ding L. Mechanisms of water restoration by aquatic plants and its influencing factors. Water Resources Protection 2007, 23(4): 18~21 (in Chinese).

[15] Huang L, Wu N C, Tang T, Li D F, Cai Q H. Enrichment and removal of nutrients in eutrophic water by aquatic macrophytes. China Environmental Science 2012, 30(1): 1-6 (in Chinese).