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In order to restore soil polluted by crude oil, soil collected from an oil field located in northeast China were chosen to study in this research, from which three oil degrading bacteria were obtained by means of bacteria screening. We use them ultimately in order to make little damage to the micro-ecological environment. The experimental results indicated that, the degradation rate increases over...
The low propagation coefficient was a main obstacle in tree peony regeneration for a long time. Here, we present a new plantlet regenernation system to significantly improve the propagation coefficien in tree peony regeneration by lateral buds exsectting and engraving. The procedure are briefly as follows: (1)The medium for proliferation was WPM + 6-BA3.0mg/L + IAA 0.2mg/L, with the proliferation...
A new kind of floating bed named Integrated Ecological Floating Bed (IEFB) was constructed and optimized employing Oenanthe javanica, Hyriopsis cumingii Lea and artificial media. This paper studied the effect of IEFB on eutrophic water quality improvement with results showing that the average removal rates of TN, TP, NH4+-N, CODMn and Chl-a by IEFB were up to 42.6%, 56.6%, 77.7%, 13.5% and 62.2%,...
China is one of serious water shortage country in the world, per capita water resources is only a quarter of the world's per capita water resources. Groundwater is an important part of water resources, It plays an important role in national economy development. However, in recent decades, because of climate change and human disturbances, a series of environmental problems is caused by exploiting groundwater,...
For reasons of temporal and spatial changes and strong randomness etc, the quantitative simulation for water environment pollution in plain lake basin is a much difficult work all the time. Simulation model makers are required to comprehensively master, as well as synthesize many methods or techniques to describe the natural and social complex systems. In this paper, Lake Chao was taken for example,...
In order to know the environmental capacity, prevent the continual deterioration of the water quality of Fen River, and promote the harmonious development of economy and aquatic environment, the formula for calculating water environmental capacity of each reach was derived from generalizing the outfall based on the 1-D steady state water quality model. In accordance with the existing specials of water...
Three aquatic macrophytes including Rumex dentatus Linn., Ranunculus sceleratus Linn. and Rorippa palustris Leyss (Bess.) were selected as materials for investigating their purifiction efficiencies by analyzing pH value, total nitrogen (TN), total phosphorus (TP) and chemical oxygen demand (CODCr) of the eutrophicated water from Jialu river. The results indicated that the three species had different...
Agricultural water shortage is intensified climate warming. Treated water induces river pollution remain serious while agriculture uses high quality surface water for irrigation. To solve the contradictory, the article posed two tactics. The first tactic was that the treated water was straightway discharged into farmland irrigation canal or agricultural water storage facilities. The second tactic...
An evaluation index system was established to assess wastewater reclamation and reuse project. Considering the different characteristics and main factors of the centralized and decentralized wastewater reclamation and reuse engineering, the index system includes 13 individual indices in five categories: water quantity, water quality, techniques, economy and management. After the index system having...
According to the Xixi wetland conservation project, Xixi National Wetland Park is divided to 3 functional zones, the 4000 patches in the park is categorized to 7 patch types, and the usage of landscape metrics at both the class level and the landscape level studies characteristics of the landscape spatial pattern. The results indicate: there are numerous patches in the park, landscape richness is...
Based on the water quality investigation data from August in 2009 to July in 2010, the water environment quality of Zhanjiang Mangrove Nature Reserve was assessed using single water quality parameter model, integrated water quality index model, organic pollution index model and eutrophication assessment model. The results showed that the key pollutants were dissolved inorganic nitrogen (DIN), dissolved...
This paper discuss the energy consumption problem of dissolved air flotation through theoretical analysis and experimental research methods. According to surface free energy principle,we can get that the energy dissipation of traditional pump aspirated type dissolved air flotation experiment system is 8359.4 times theoretical value effective power by calculation. Therefore, the potential of energy-saving...
The analysis of phenoxy acid herbicide 2,4-D(2,4-dichlorophenoxyacetic acid) and its ozonation intermediates using high performance liquid chromatography (HPLC) was studied in this paper. We discussed the effect of detective wave, mobile phase components and flow rate on the separation and detection of 2,4-D and its ozonation intermediates. Experimental results reveal several key parameters in the...
The pollutants, which were brought by the living and producing of the village in Lake Baiyangdian, would have some effects on surrounding water quality. During May 2009 to March 2010, the research evaluated and analyzed the eutrophication state of five selected sampling points. Experimental result indicated that, the water around the village appeared eutrophication phenomenon overall, fish and poultry...
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