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With the development of the economy and rapid population growth, the range of contaminated groundwater is getting bigger and bigger. Groundwater pollution has a slow process, and it is not easy to find and difficult to control. Once polluted, it takes more than ten years, sometimes even decades to recover. Groundwater pollution has a close relationship with people's health. This paper mainly discusses...
This paper presents a novel automatic air purification and adjusting device, it can purify and disinfect air using ozone water, absorb harmful gases, absorb carbon dioxide using absorbing liquid, purify air by plant root, realize the indoor temperature adjustment by natural water and without refrigerant such as Freon. We can solve the cross contamination and secondary pollution problem of normal air...
To reveal the migration and transformation rule of nitrogen in the vadose zone and groundwater and to determine the migration mathematical model, we researched the migration and transformation rule of ammonia nitrogen, nitrate nitrogen, nitrite nitrogen in the vadose zone and groundwater by the soil column leaching experiment. The results indicate: using ammonium bicarbonate shows a stronger alkalinity...
Land use/land cover change (LUCC) as an important part of global environmental change has always been one of the hottest issues of ecology research. Based on RS and GIS methods, land use information for 1990 and 2008 was acquired from TM images and analyzed in Yanqing County, Beijing, China. This paper analyzes spatial-temporal land use change in two basins covering the study period. The results showed...
Principal component analysis (PCA) were applied to assess surface water quality of the Songhuajiang River basin, China. Thirteen physical-chemical parameters in 25 stations were collected monthly during the period of 2008. Three factors were extracted by PCA, which explained 83.79% of the total variance. The first factor (PCA1) was positive correlated with permanganate index, BOD5, NH3-N, CODCr, TN,...
Quickly and accurately extract the water body information from remote sensing image is an important work in water pollution monitoring and LUCC research. In this paper, water body information of Yixing city in the west of Taihu Lake, China was extracted based on ALOS AVNIR-2 multispectral image, using the multi-level and multi-rule decision tree method. The image was acquired on 29 November 2007,...
In 2007 there were a number of food safety incidents with Chinese exports that drew media attention worldwide. There were widespread calls for tightening of regulatory barriers or outright bans on imports of Chinese foods including aquatic products. On June 28, 2007, America FDA announced a broader import detain of all farm-raised catfish, basa, shrimp, dace, and eel from China for residues from drugs...
In the Yanqing area, Beijing, China agriculture water use and soil erosion are significantly serious due to large-scale agricultural irrigation; It has been the most prominent issue of agricultural irrigation for water resources protection, mainly because irrigation water use utilization efficiency is very low. The key issue of water-saving agriculture is to improve the utilization of irrigation....
Grey system theory is widely used in various environmental quality assessments for the grey characteristic of environmental system. In this paper, according to grey theory, a grey correlative model which is variable weights and based on water chemistry and productivity indicators is constructed to evaluate the marine environmental quality of Shenzhen Bay. The results show that the sea water quality...
The present work consisted in the study of Titania/Zeolite catalyzed ozonation for nitrobenzene removal. Catalytic activity of the supported TiO2 is strongly influenced by the heat treatment temperature. Titania/Zeolite calcined at 600??C showed the best activity. An approximate increase of 21% in removal rate was achieved for catalytic ozonation compared with single ozonation. Kinetic study of dissolved...
It has been found that non-point source pollution - excessive nitrogen loading is one of the main reasons for the eutrophication of Miyun Reservoir, Beijing, China. At present, the research about eutrophication is still confined to a single level of analysis lacking a full perspective of monitoring, integrated simulation and evaluation. The model domain is the area of Miyun Reservoir, Beijing. This...
The Coastal wetlands are important ecosystems between land and sea ecosystems. However, people develop wetlands so excess that decrease their areas and quantities. The coastal wetland has become a more frangibal ecosystem. Now the coastal wetlands of China are confronting serious threaten of wetland loss and eco-environmental deterioration. The research approach of the paper is an analysis of the...
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