Applied Mechanics and Materials Vols. 316-317

Abstract: Transport development bring a negative impact on human survival ecological environment, such as destruction of vegetation, air pollution, soil erosion and other environmental issues. The actuality proves that the use of tunnel development of underground space can improve traffic quality, while also protecting the environment. Therefore, tunnel engineering and utilization of underground space are to protect the ecological environment to be effective ways for realizing economic sustainable development of economy. In this paper, based on the practical application at home and abroad, for the big cities, mountain areas, river waters, the suitability evaluation and beneficial discussion about the transportation by using tunnel to protect the ecological environment are of great practical significance to protect and improve the ecological environment.

Abstract: This paper uses the year data from 1998 to 2009, according to the MIMIC model in structure equation model to construct the adaptability system model of China's climate change to grain production, and makes an empirical research, found that sows area, the consumption of chemical fertilizers, agricultural water conservancy construction expenditure and the rainfall affects the maximum on grain production yield fluctuation of our country ; then according to the estimation results calculated the latent variable intensity fluctuation of grain yield, found that the grain production fluctuation of output intensity in future is further toward the positive trend.

Abstract: The research was conducted at Shandong Architecture University of Jinan, the capital of Shandong province, China. The lab and onsite experiment was carried from March, 1, 2010 to November, 1, 2010. schoolyard wastewater was pumped to constructed wetland tank. Some conclusions were found: the shale ceramsite had a strong adsorption capacity. The rate of adsorption was very quickly;the effext of Phragmites australis was obviously. The removal rate of COD, TP,TN could raise 10,15,30% seperatively;treating schoolyard wastewater by constructed wetland was feasible.

Abstract: A cyanoethylated wastepaper-degrading bacterial strain S11 was screened from the surface humus soil in the forest of Yunnan University. The bacterium was identified through analysis of morphological, biological and biochemical features and 16S rRNA sequence. S11 enjoyed above 99% homology with Ochrobactrum sp.CRRI29’s 16S rDNA sequence, therefore the baterium belonged to Ochrobactrum sp. The research on degradation features of S11 revealed that S11 bacterium could effectively degrade cyanoethylated wastepaper under 35°C, pH 11.0, 25% inoculum size and 50g/L substrate concentration; under the optimum conditions, the degradation rate of cyanoethylated wastepaper was 46.83% after degradation by S11 bacterium for 192 hours.

Abstract: The full-scale of PC/Cyclone Boilers with common wet flue gas desulfurization (WFGD) with limestone forced oxidation (LSFO) was studied. Ontario Hydro Method (OHM) recommended by the United States Environmental Protection Agency (USEPA) was used to determine mercury emission and speciation at these two full-scale WFGD systems, and OHM quality assurance/quality control (QA/QC) was followed during the field testing. WFGD re-emission problems were repeatedly observed at this unit. Selective catalytic reduction (SCR) had significant effects on mercury removal and Hg⁰ re-emission rates across WFGD. Effects of injection of continuous chemicals additive containing HS-, S^2- or I^- on mercury re-emission control were also conducted at this unit.

Abstract: The information on the soil microorganism of alkali-saline grassland was limited. To demonstrate the effect of aboveground biomass, temperature and moisture on soil microorganism of alkali-saline grassland, the soil microbial counts, biomass carbon, diversity index, aboveground biomass, soil temperature and moisture were measured and analyzed in Songnen grassland. The results showed that aboveground biomass, soil temperature and moisture had significant effect (P0.05). To sum up, the change of the soil microbial counts and biomass carbon were related primarily by plant growth.

Abstract: Limitation of water resources at the arid countries (Uzbekistan and the most part of the Chinese national democratic republic) demands to develop more exact and mathematically proved methods for moisture management on an irrigated field. Results of theoretical researches on dynamics of humidity have shown: (1) similarity of physical processes of change of humidity of soil on different irrigated areas. (2) Hysteresis of the nature of humidity at an irrigation and drainage. (3) Sharp recession of humidity of soil in the root zone.

Abstract: This paper takes the nano tungsten oxide as an example and researches the influence of modification on optical properties and catalytic performance through the doping modification in the preparation process of sol-gel. It adopts SEM spectroscopy analysis, X-ray diffraction (XRD) and UV-visible spectrophotometry methods for characterization of nano-doped tungsten oxide structure and optical absorption properties, and adopts the one-shot purification rate of formaldehyde, toluene and benzene for characterization of the purifying performance of the reforming catalyst that used to purify the ceramic material.

Abstract: To assess the effect of environmental vibration induced by metro transit, a fuzzy comprehensive evaluation was conducted. First, a three dimension bridge-soil-building FE model was established using the parameters from a practical engineering, and the time-history loads were utilized to analyze the vibration in the nearby buildings. Second，a questionnaire survey was conducted based on which the human body comfort effect factor and its weight were determined. Last, the fuzzy comprehensive evaluation was conducted combined with the results of the FE analysis and the questionnaire. The evaluation results show a high consistence with the fact, indicating that the fuzzy comprehensive evaluation is a effective method to evaluate the effect of environmental vibration to the human body.

Abstract: Coal gasification wastewater (CGW) is a refractory and toxic wastewater. The secondary effluent quality usually cannot meet the discharge standards after conventional biological treatment processes. Heterogeneous catalytic ozonation is a promising technology for solving this problem. Two carbon materials were investigated as ozonation catalysts for the removal of the quinoline and COD in a real CGW secondary effluent. Results were indicated that CuOx /GAC presented a higher catalytic performance than granular activated carbon and single ozone, efficiency of removal of quinoline and COD were 69%, 92% respectively. Higher pH had positive effect on the degradation of quinoline due to the formation of hydroxyl radical (removal of quinoline rapidly reached above 90% in pH=10). The presence of the radical scavenger tert-butanol (TBA) evidenced the participation of hydroxyl radicals (•OH) in the oxidation mechanisms of quinoline. The stability of the catalysts was demonstrated by carrying repetitive experiments reusing catalysts sample.