Advanced Materials Research Vol. 1051

Abstract: In order to analyze the water use efficiency of Jiangsu by the method of quantitive research, this article takes the water use amount per ten thousand Yuan GDP as object of study, and discusses the influencing factors of water use efficiency to give the suggestion of policy , regular and control. Theory analysis and expects consulting have been used to get 21 potential influencing factors. Then we get the regression equation which contains water use amount per ten thousand Yuan GDP as the dependent variable, and 21 mentioned factors as independent variables through introducing collected factors’ dates in the period of 1997~2010 into the stepwise regression which is on the basis of principal component analysis. As a result, the major four factors have been got: irrigation area per capita, Industry polluted water standard drainage, education cost, proportion the output value of tertiary industry accounting for of GDP. And this research works for the water use efficiency red line investigation in the future.

Abstract: Based on the remote-sensing data and ground data, this study is conducted on the ecosystem function of Yiwulvshan National Nature Scenic Area (hereinafter as “Yiwulvshan Scenic Area”) from 2000 to 2010 with the GIS (geographic information system) and RS (remote sensing) technology, so as to provide reference for better environmental protection of the scenic area. It is shown from the results that there is no obvious change of land use in Yiwulvshan Scenic Area; while the capacity for soil and water conservation is slightly improved mainly due to increase of vegetation coverage; the vegetation net primary productivity declines somewhat about 5.27% in past 10 years; and biodiversity is slightly increased. As a whole, the ecosystem function of Yiwulvshan Scenic Area basically kept stable in the past 10 years, which indicated that the existing regulations can effectively protect the ecological function of the Scenic Area.

Abstract: The uranium tailings is a typical major hazard sources because of its specificity, which could cause serious casualties, property damage and environment pollution in the event of an accident, and thus calls for the attention of everyone. In this paper, we will connect with the practical situation of the uranium tailings, identifying the factors of the dam, such as stability failure of dam slope, overtopping, structure damage, seepage damage and so on. To analyze the related factors and put forward countermeasures based on the analyzed results to control the harmful factors, this will lay the foundation for improving the safety monitoring and security management of uranium tailings impoundment.

Abstract: This research analyzed the effective performance of a laboratory scale vertical surface flow constructed wetland (VSFCW) system, for the treatment of wastewater from fertilizer plant. Two reactors with a volume of 80 L each were used for the experiments. One of the reactors contains 2 units of floating plants known as water hyacinth (Eichhornia Crassipes) while the other was used as a control. The treatment was carried out in 2 phases: the wetland was first fed with treated domestic wastewater for acclimatization and stability and thereafter, fed continuously with analyzed wastewater samples from the fertilizer plant at the flow rate of 8 L/day, surface loading rate of 0.025 kg/m²/day for COD, 0.013 kg/m²/day for Ammonia, 0.021 kg/m²/day for Nitrate, 0.01 kg/m²/day for Nitrite, and 0.01 kg/m²/day for Phosphorus and a hydraulic detention time of 10 days. The treatment was monitored for 27 days and the performances evaluated. Results of the system indicated that the average removal efficiency was 47 % for COD, 89.01 % for ammonia, 83 % for nitrate, 80 % for nitrite, and 81 % for phosphorus. The quality of the discharged effluent from the VSFCW showed that the system may be a viable technology for the wastewater treatment.

Abstract: The article presents the results of experimental research for final treatment of gold mining enterprise waste waters using water lentil (Lemna minor) of (Lemna L. ) genus, (Lemnactat S.F. Gray) family, and common red grass (Phrágmites austrális (Cav.) Trin. Ex Steud.). It was shown that a level of heavy metals extraction, cyanides and rhodanides from the industrial waters of gold processing plant is greatly higher in comparison with chemical method used at the plant. The proposals are given to the gold mining enterprise to establish a pilot plant for final biological treatment, its novelty is confirmed by the Patent of Russian Federation of 20.01.2014.

Abstract: Natural gas is one of the cleanest and hydrogen-richest energy among all the hydrocarbon energy sources. This paper expects to examine the causal relationship of economic growth with natural gas consumption, sustainable development, and social development. Natural gas is the most principal urban gas source in China. In addition, shale gas has become a new major alternative resource for satisfying the rapidly increasing demand for energy since 2012. Then, the importance of examining the relationship among economic development, natural gas consumption and environmental performance index is obvious and urgent.

Abstract: Combined with the characteristics of the high-speed railway regional environment system, the paper establishes a cumulative environment impact assessment model with the system dynamics in the high-speed railway regional, which is divided into three subsystems: economic, environment and pollution subsystems. Each subsystem is refined into a number of state indexes. The feedback relationships is set up between each state index and various subsystems, based on the Matrix method, Delphi, Analytic Hierarchy Process and environmental carrying capacity to establish comprehensive evaluation model of the cumulative environment impact assessment in the high-speed railway region. Finally the Chang-Yi high-speed railway is taken as an example.This paper is of the important theory and practice significance to promote the cumulative impact assessment level and social environment benefit of the high-speed railway regions.

Abstract: In 2011, Guangxi makes the Lijiang River Valley, Red River Basin in Guangxi, Xijiang River Basin in southeastern Guangxi and Beibu Gulf Coastal Area of Guangxi as the demonstration zone of rural environment management. In 2012 and 2013, that four regional construct 487 and 566 facilities with the disposal capabilities of 36995m³/d and 33740m³/d. The disposal capability of a single facility is normally less than 150m³/d. The main processing is anaerobic-anoxic-aerobic biologic contact oxidation-constructed wetland and the investment in construction is small. The quality of the effluent water of the accepted facilities meets the construction requirements and good governance effect is obtained.

Abstract: A typical paddy field downstream of uranium tailing reservoir was selected to study the distribution of heavy metal and the correlativity of uranium. The results showed that the content of heavy metals in soil has a gradual decreasing trend with increasing distance from the tailings. The contents of Cu、Cd are directly proportional to the vertical depth, the content of Cr is inversely proportional to the vertical depth. Meanwhile, the content of uranium is evidently correlated with Cu and Cr and no correlativity with Cd.

Abstract: On account of the ambiguity of the concept of eco-environmental quality and the incompatibility of evaluation, the paper takes regional eco-system as "Natural - Economic - Social" complex, with the using of Matter-element Analysis Method, selects the 2012 statistics data source of the study area, gives an effective eco-environmental evaluation of the hilly areas in Pingdingshan city by the calculating of Euclid approach degree. The evaluation results show: Euclid approach degree ρHj (City center) >ρHj (Lushan) >ρHj (Ruzhou) >ρHj (Baofeng), while the number is between 2 and 3. It showed that the eco-environment quality in Pingdingshan hilly areas is good, waiting for further improvement. It offers the scientific basis and countermeasures for the restoration and further development of the eco-environment in this area.