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у-Al2O3 modified with different impregnants has been studied for COS removal efficiency under micro-oxygen conditions. γ-Al2O3 modified with 5%KOH is found to have markedly enhanced its adsorption purification ability. In the adsorption purification process, the reaction temperature and oxygen concentration of the gas are determined to be two crucial factors. After heating regeneration, the adsorption...
In order to track degradation trend of bearing performance using shock feature hidden in vibration signal, a best Morlet wavelet transform-based extraction method of full information energy entropy was proposed through integrating Morlet wavelet transform technology and full information technology. The optimization of Morlet wave shape factor was controlled by the minimum Shannon entropy. The information...
Lignocellulosic biodegradation by microorganism is difficult as the complicated structure of lignocellulose and there are different views on the anaerobic degradation mechanism. In this paper, anaerobic degradation mechanism of lignocellulose is outlined. The research orientation has some preliminary discussions further more.
CO2, CH4, H2S, NH3 and other gases are generated in sewer by anaerobic microbial degradation. The corrosion of sewer gases is not only facilities but also easily cause an explosion or poisoning resulting casualties, seriously affects people's daily life and health. In this paper, the city sewer wastewater by simulating the anaerobic degradation process was researched. And the effects of temperature...
This paper took the forests ecosystem of Naban River Watershed National Nature Reserve as research subject, the forests ecosystem was classified into natural forest, rubber plantation and farmland, and the forest water conservation value was evaluated by shadow engineering method. The result indicated that the forest water conservation value was 1.1 × 108 yuana 1, which is 4.29 times as much as the...
Sodium hypochlorite as oxidant was used for adsorbing phosphine, which was emitted from sodium hypophosphite industry. The effects of the available chlorine density and pH were mainly studied via experiments. The results can be concluded that when the speed of carrier gas flow is 20 mLmin-1, the temperature for reaction is about 20°C with pH at 9, and the density of sodium hypochlorite solution is...
A new cerium-loaded cation exchange resin adsorbent for arsenite was prepared by impregnating cerium onto cation exchange resin. Batch adsorption experiments under various conditions, such as time, temperature, pH and coexistent ions were carried out to evaluate the adsorption characteristics of Ce-loaded resin in the removal of As(III) from aqueous solutions. The results show that the adsorption...
Aiming at investment, macro control and related demands of waterway transport market of dangerous goods in the Three Gorges Area, first, the actual state of the waterway transport market of dangerous goods in the area is analyzed, which includes the number and range of waterway transport companies on dangerous goods in the area, the number, type and deadweight of dangerous goods traffic carriers,...
Engineering survey often encountered some special complex terrain, for example, large-scale reservoirs, lakes, marshes and wetlands, and so on. Conventional measuring methods cannot accurately detect the data of these environments, because of their special terrain, and difficult to piling, to set up measurement instruments. This paper presents a new methodology formapping terrain and landscape of...
Conventional measuring methods cannot accurately detect the depth and the horizontal distance of the lakes, especially when a fixed-point sampling is needed on the surface of the lake, because it is restricted by the natural conditions, capital and human resource. This paper presents a new methodology for measuring the isobath and the horizontal surface distance of a lake. And the mapping process...
This paper presents a image capture and storage system using SOPC approach (System on programmable chip). The whole system is realized on Altera DE2 platform. Under the same performance, its flexibility is better than the normal system. The pipeline bridge is used to improve the performance of system. The image capture, buffer and display are realized by hardware. The image storage is realized by...
The adsorption equilibrium of CO2 was measured on coconut shell activated carbon by using a static volumetric method. Adsorption isotherms over the temperature ranged 308 K ~ 353 K were measured. The results showed that the capacities of adsorption of carbon dioxide on activated carbon at different temperatures were as follows: 308 K > 323 K > 338 K > 353 K. The absorption capacity increases...
CuO-ZnO-La2O3/activated carbon (AC) adsorbent was prepared and used for efficient adsorption removal of PH3 at various temperatures in the presence of O2. The feasibility of water and thermal regeneration of a spent CuO-ZnO-La2O3/AC adsorbent was also investigated. The influences of regeneration temperature, water concentration and calcination time were done on the spent CuO-ZnO-La2O3/AC adsorbent...
Pre-reservoirs are small reservoirs having an average theoretical water retention time of a few days. They are situated immediately above the larger main reservoir or lake, whose nutrient loading it is their purpose to reduce. Rare earth sorbents were put into pre-dams to purify pollutants in water. A theoretical deduction showed that low-concentration phosphate adsorption process accorded with a...
Experiments were carried out to study the factors influencing modification of activated carbon (AC) and the effect of adsorption of Phosphine (PH3). Impregnated AC was used as a modified adsorbent and its adsorption capacity for PH3 was studied in laboratory. The factors influencing modified AC included the type of adsorbent, the type of impregnant and the concentration of impregnant. The adsorption...
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