Advanced Materials Research Vols. 864-867

Abstract: Land ecological security is related to the sustainable development in every country. The ecological safety status of Poyang Lake Eco-economic Zone was chosen as study area in this paper. Based on Emergy, an evaluation index system of land ecological security is constructed from the perspective of the natural, economic and social factors. The AHP method was used to determine the index weights and multi-factor comprehensive evaluation method was also adopted to quantitatively evaluate and analyze the ecological security status of land use in the Poyang Lake Eco-economic Zone. The results show a downward trend from 2006 to 2010, the state of land ecological security changed from being comparatively safe to being critical safe. The value of ecological security for the Poyang Lake Eco-economic Zone decreased from 0.7031 in 2006 to 0.6576 in 2010.

Abstract: Contamination soil by heavy metals is an increasing environmental issue. The concentrations of 6 metals in the soils sampled in 1991 and 2011 from the 17 cities of Anhui Province (China) were investigated. Tow pollution indexes models were employed to investigate the soil environment quality of 17 cities. The results showed that the concentration of Mn is the highest. During the past 20 years, the concentrations of Cd, Mn and Cu in soil increased gradually. Based on the tow assessment method, environmental quality were assorted as class I (Excellent) or Class II (Good) for each soil with single-factor index method, and most was identified to be class I for the soils with the comprehensive index model. In comparison with the single-factor index method, the comprehensive index model concerned both dominant parameter and average contribution of all factors to the integrated environmental quality.

Abstract: Dibutyl phthalate (DBP), an accepted environmental endocrine disrupting compound, which has anti-androgenic effects,is widely used in many industries such as plastics, pharmaceuticals, plastic food packaging materials. This article intends to study the effect on JNK/MAPK pathways in the damage of rat testicle sertoli cells induced by DBP via vitro test. Testicular sertoli cells of rates were incubated by medium containing DBP in different concentrations (0μg/ml,1μg/ml,10μg/ml, 100μg/ml). after culturing for 24 hours the expression of vimentin was detected by immunofluorescence; the expression of vimentin mRNA detected by RT-PCR; Western blot analyzed the expression of related protein of JNK/MAPK pathways in sertoli cells. The results showed that vimentin highly express in sertoli cells and gradually decrease with the increase of poisonous doses. The mRNA expression of vimentin in each exposure group has a downtrend with the increase of does. The total protein of JNK and P-JNK protein increased gradually in a dose effect manner. These results suggested that DBP can decrease the expression of vimentin mRNA, the decrease of which was regulated by JNK/MAPK signal transduction pathway that activated by DBP, and then induced the apoptosis of Sertoli cell.

Abstract: The interaction of the induced flame front with coal dust cloud with different equivalence ratio was experimentally investigated by the vented flow with K_v=5.4 and K_v=10.9, and compared to the vented flow pressure characteristics of methane with and without coal dust. The increasing second peak structure of hybrid mixture pressure suggested that a dust secondary explosion does exist in external space of vent vessel. The pressure results with the increasing equivalence ratio of hybrid mixture also exhibit that there is not rich limit for coal dust in hybrid explosions. However, the maximum pressure increase ratio reveal the maximum pressure increase ratio will decrease with the increasing equivalence ratio of hybrid mixture if it is over one, that shows the dispersion of coal dust cloud take clearly effect on the heating spreading between coal dust particles. The initial methane concentration also takes significantly impact on the combustion of coal dust due to changing the induced flame front strength.

Abstract: The oil spill probability is the core problem on studying the risk of oil spill. The oil spill probability model of offshore facilities is established, which based on the ETA model and the oil spill reason analysis of offshore facilities and subsea pipelines. Through a lot of statistics, combined with the actual situation in the Bohai Sea, the probability of various events is calculated. Finally the probability of oil spill for the Bohai Sea oil facilities and subsea pipelines is calculated and providing references for marine pollution prevention and the study of oil spill risks.

Abstract: The Inner Lake, a typical waterfront lake was selected as the research area. By field investigation and laboratory experiment, the spatial distribution of Pb content in deposited sediments was analyzed and the relationship between Pb release rate and flow disturbance was established. A numerical model was constructed to evaluate the Pb load prior to and post the exchanged water regulation in different typical years. The results show that: influenced by the variable hydrodynamic conditions of the Yangtze River, the average Pb pollution load is the highest in high-water year; water regulation has an obvious impact on Pb pollution load in the Inner Lake, which is decreased by 65.12%, 54.53% and 62.89% in the three typical years respectively post water regulation.

Abstract: Non-radioactivestrontium(Sr²⁺) was used to investigate the migration of radioactivestrontium in loess. The sorption and retardation characteristics of strontiumin loess were studied by batch tests and column experiments. The experimentalresults showed that the equilibrium sorption data for Sr2+ was fitting well tothe Freundlich isotherm models(r²= 0.97). And the Rd obtained frombatch experiment was larger than Rd determined by column test. The resultsindicated that Rd values derived from column tests are more accurate toevaluate transport of radionuclides in contact medium.

Abstract: Shielding gas used during the heat treatment has Explosion Hazards,Quenching oil has fire danger.This paper based on their hazardous properties,established the model of HAZOP method combined with fault tree analysis, combined with a heat treatment plant in tianjin to analyze its risk and gives countermeasures.

Abstract: on the basis of domino effect, this paper analyzes the LPG tank pool fires and BLEVE fireballs dangerous characteristics once leakage, and thermal radiation domino effect model is established. A LPG tank area in tianjin as the analysis object, based on the calculation results the countermeasures are given.

Abstract: The quality of cultivated land use of Zhangjiagang was surveyed and analyzed in 2009. Overall distribution of cultivated land is mainly the second and the third class. The first and the fourth class are less. Spatial distribution of heavy metals content in soil, rice and wheat roots was analyzed by IDW interpolation. The results show that the contents of Hg, As, Se, Pb and Cu in soil have a certain differences in the spatial distribution. It mainly reflect that Hg pollute the soil in the southern region of Zhangjiagang. The contents of Hg, As, Se, Pb and Cu in rice, wheat roots also have a certain differences in the spatial distribution. It mainly reflect that Hg pollute the rice, wheat plants in the western and southern region of Zhangjiagang. The productivity of cultivated land has the overall downward trend from 1996 to 2009 in Zhangjiagang. There are 10818Kg/hm² in 1996 and 8327 Kg/hm² in 2009. The average decreased rate is 191.6Kg/hm² every year.