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Dong W.G.,Shandong Normal University | Chen Q.F.,Shandong Provincial Analysis Test Center | Miao M.S.,Shandong Normal University | Yang H.Y.,Shandong Normal University
Applied Mechanics and Materials | Year: 2014

Five different lengths artificial aquatic plants were used to purify wastewater. The artificial aquatic strings of 10cm diameter cylinder were divided into five groups, such as 0cm (A, CK), 50cm (B),100cm (C),150cm(D) and 200cm(E), respectively. The experimental results showed that the best removal efficiency was 78.3% and 73.5% for COD and ammonina nitrogen in the C group, and for the total phosphorus (TP), the best removal efficiency was 61.3% in the B group. Therefore, it is suggested that the best length is 100cm at 22°C to 26°C in the water according to the comprehensive removal efficiency. © (2014) Trans Tech Publications, Switzerland. Source


Chen Q.F.,Shandong Provincial Analysis Test Center | Dong W.G.,Shandong Provincial Analysis Test Center | Dong W.G.,Shandong Normal University | Ma J.J.,Shandong Provincial Analysis Test Center | And 4 more authors.
Advanced Materials Research | Year: 2014

Hydraulic loading rate (HLR) is an important operational parameter for constructed wetland to purify wastewater. In this paper, it is the main objective to select the optimal parameter of HLR. During the four HLRs (i.e., 6 cm/d, 12 cm/d, 24 cm/d and 48 cm/d) operation period, six days were used as one stage. The experimental results showed that the best average removal rates of CODcr (59.7%) and NH3-N (89.4%) were at the HLR of 6 cm/d. In the meantime, the best average removal rate of total phosphorus (TP, 50.0%) was at the HLR of 24 cm/d. According to the low influent TP concentration, it is suggested that the HLR of 6 cm/d should be used in the multi-stage constructed wetland. © (2014) Trans Tech Publications, Switzerland. Source


Chen Q.-F.,Shandong Provincial Analysis Test Center | Shan B.-Q.,CAS Research Center for Eco Environmental Sciences | Ma J.-J.,Shandong Provincial Analysis Test Center | Gao X.-G.,Shandong Provincial Analysis Test Center | And 3 more authors.
Huanjing Kexue/Environmental Science | Year: 2011

To study the purification mechanism and biogeochemical cycle of wetlands, the concentration of Fe/Mn and oxidation reduction potential (ORP) in the pore water were monitored in situ on the Wuhan Zoo stormwater wetland from 2004 to 2006. The results showed that the water level of the wetland was changed from -10 cm to 30 cm, and the range of ORP was-120-220 mV. The elements of sulfur, iron and manganese were the main oxidation and reduction systems in the wetland. The ranges of total Fe, Mn and Fe 2+ concentration were 0.60-2.35, 0.75-1.89 and 0.20-1.25 mg·L -1, respectively. The concentrations of total Fe, Mn and Fe 2+ were higher in spring and summer than that in autumn and winter, while the sulfate concentration was on the contrary and the ratio of Fe 2+/Fe was slightly various in different seasons. From the surface of 10 cm to 50 cm underground, ORP and pH was decreased, whereas the concentrations of total Fe, Mn and Fe 2+ were increased (except for the surface water). Through the correlation analysis, it was showed that the correlation of ORP and total Mn and Fe 2+ was negative and significant, while there was no significant correlation between ORP and total Fe (R=-0.169, p<0.0001). The order of the correlation coefficient was total Mn, Fe and Fe 2+ in turn. Therefore, the systems of sulfur, iron and manganese were the important component of the oxidation and reduction system for stormwater wetland. Source


Chen Q.F.,Shandong Provincial Analysis Test Center | Yang H.Y.,Shandong Provincial Analysis Test Center | Yang H.Y.,Shandong Normal University | Ma J.J.,Shandong Provincial Analysis Test Center | And 4 more authors.
Advanced Materials Research | Year: 2013

The traditional water treatment technologies mainly include physical reparation technology, chemical remediation technology and biological-ecological restoration technology. However, there are many limitations in practical application, especially for heavy polluted river. For this reason, it is extremely urgent to explore new technology and method on river ecosystem restoration. The materials of artificial plants are limited to the factors of water transparency, possesses acid and alkali-resistant, resistance to staining and flexibility. The characteristics of artificial plants are low in investment, effective and no secondary pollution. Therefore, it has a broad prospect of application in water treatment. In this paper, the detailed review and application of artificial plants were involved in order to provide theoretical basis for more widely used of artificial aquatic plants. © (2013) Trans Tech Publications, Switzerland. Source

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