Advanced Materials Research Vols. 955-959

Abstract: This paper investigated whether differences exist in the surface water quality when the wetland was under the management of different organizations through factor analysis. Factor scores suggest that overall there is a regular reduction of nutrient sources BOD, COD, TKN, TN, NH₃-N, NO₂-N and fecal pollution in this wetland. The nutrient content is the highest at the water inlet and gradually decreases over densely planted zone I, the open water zone, densely planted zone II and the discharge orifice, reaching the minimum level at the outlet. The influence factors of suspended solids TB and SS exhibit irregular variation in the different water bodies. Cluster analysis is conducted based on water quality using data collected between 2008 and 2012. Results reveal that regardless of wet or dry seasons, similar water quality is observed in the open water zone and densely planted zone II. Water quality at the inlet resembles that in densely planted zone I.

Abstract: In order to further improve urban air quality, this study applied hourly PM₁₀ mass concentrations in 5 monitoring stations during 2008-2012 to discuss spatiotemporal variations and evaluate air quality in Nanchong city, southwest China. The results showed that the annual mean PM₁₀ concentrations during 5 years was 61.4μg/m³, and the concentrations order of 5 stations was JC (65.4μg/m³)>SW(64.6μg/m³)>JL(60.9μg/m³)>LY(60.4μg/m³)>GP(55.9μg/m³).The monthly mean concentrations in spring and winter were higher than in summer and fall. There was no obvious "weekend effect" in Nanchong and it was illustrated that the contributions to PM₁₀ of vehicle exhaust could be smaller. The hourly concentrations were 54.8~68.1μg/m³ from 0:00 to 23:00 and the maximum appeared at 12:00 and 21:00 for each station. The rate of reaching standard was 97.5~99.2% from 2008 to 2012 and the order was GP(99.2%)>LY(98.8%)>JL=SW(98.3%)>JC(97. 9%). The causes of these PM₁₀ variations need to be studied deeply.

Abstract: The main cause of haze is atmospheric fine particles PM2.5. This is very important to research the evolution characteristics of physical chemistry about PM2.5, especially the persistent observation for PM2.5. This paper used the Grey Relational Method to analyze the correlation between PM2.5 and other air quality index in this paper. The study concludes the influence of between PM2.5 and other indicators.

Abstract: In this paper, a genetic algorithm is used has been a new method of total amount control of atmospheric pollution. The global search optimization genetic algorithm with adaptive characteristics, from the point of control the concentration distribution of source density, the source intensity distribution satisfies the requirement of the root of the total amount control. The implementation of the method is: will emissions of various pollution sources in the area of coding of chromosome, genome group according to the biological evolution regularity in the evolution of the simulation environment of natural selection, after the evolution of several generations, finally to get the best the best individual represents the intensity distribution of the source. The research results show that this method is effective and feasible.

Abstract: In this analysis we present the characteristics of the habitats of a species rare in Europe - Botrychium virginianum (L.) Sw., in remote parts of the geographical range on the territories of USA and Russia. The analysis confirms the possibility of the the growth of this species in naturally recovering forests, gives an update of the information about a variety of environmental conditions of growth of this species and shows its similarity in different parts of Europe. At the time of research conducted in Bethlehem this species appeared to be rare, their populations small, which is connected with the cryptic character of the populations of this species as well as with the ability of showing a wide range of polyvariety of ontogenesis. Only in one of the examined populations the age spectre is fully represented and we can see all the basic states of ontogenesis. This species is also rare on the territory of the Kostroma region while the populations are larger and contain all states of ontogenesis of sporophyte. The phenology of the species was examined. The analysis points to the vista of creation of new populations by introduction of spores in new areas and shows the necessity of monitoring in order to develop mechanisms of protection if the species.

Abstract: A design of novel wireless environment parameter measuring instrument based on solar energy is introduced in this paper.The measurement instrument uses solar self-powered technology,can achieve the rapid detection and display of particulate matter, light intensity, temperature, humidity,noise and other environmental parameters,and uses wireless networking and PC terminal to form a network.The measuring instrument also has a control output function,the control output can be set according to the parameters, to meet the needs of different applications. The hardware and software development of the instrument were realized.And through the experiments showed that the designed measuring instrument can quickly and accurately detect a variety of environmental parameters, full-featured, cost-effective, wide, and has broad application prospects.

Abstract: A method for determination of cobalt in water by flow injection spectrophotometry based on the catalytic effects of cobalt on the oxidation reaction of arsenazo III by potassium bichromate in HAc-NaAc buffer solution of pH 4.6 was established. The relationship of the reduced absorbency to the concentration of cobalt was good linearity and the maximum absorption peak located at 550 nm. The affecting factors on the strength of absorption including acidity, dosage, temperature, coexisting ions and so on, and the optimal conditions of the reaction in the system were investigated. Calibration graphs were linear for ranges of 0 to 20 μg/mL and a detection limit of 0.3 μg/mL cobalt was achieved. The proposed method was successfully applied to the analyses of industrial waste water samples, with relative standard deviation of less than 1.5% and the recoveries are 95.1% to 96.8%for the determination of cobalt.

Abstract: Crop residues combustion is an important anthropogenic sources of volatile organic compounds (VOCs) in China.Emissions of VOCs from crop residues combustion significantly affect climate forcing and human health. A reliable estimation of VOCs emission from the source is the important prerequisite for emission impact assessment and control strategy in the urban or regional areas. VOCs emissions from crop residues combustion in Hubei Province, China and the districts were estimated by factor analysis method, which was based on the yield of major farm crops in the period of 2010. Moreover, Cultivated-land emission intensity (I_c) and Regional emission intensity (I_r) were also calculated. VOCs Emissions from crop residues combustion in Hubei Province were about 80, 000 t in 2010; I_c and I_r were 2.431 t•km^-2 and 0.434 t•km^-2 respectively; Huanggang, Jingzhou, Xiangyang, Jingmen and Xiaogan had the top five of VOCs Emissions from crop residues combustion. I_c and I_r of Qianjiang, Xiaotao and Ezhou were all more than the average; I_c of Suizhou and I_r of Tianmen were also above the average. 10 city mentioned above should be draw attention as the priority control area. Furthermore, crop residues utilization according to agricultural cyclic economy is a feasible way to cope with the environmental problem of biomass combustion.

Abstract: The concentration levels and composition characteristics of Volatile Organic Compounds (VOCs) were analyzed at the entrance and middle site in a traffic tunnel located at Red Star Road Tunnel in Chengdu. Results showed: concentration of alkanes and aromatics were much higher than other VOCs in vehicle exhaust source. Aromatics, alkenes, aldehydes and ketones concentration levels in tunnel were higher than at the entrance site, and the alkenes concentration in the tunnel were 38 times that at the entrance tunnel. Concentration of alkanes and esters in the tunnel were lower than that at the entrance site.

Abstract: With the purpose of improving the effectiveness of Strategic environmental impact assessment (SEA), the paper analyzed and discussed a case study of Shaoguan Port master planning SEA. Specific to the characteristics of inland ports and construction, the paper put forward the key points of inland ports master planning SEA, and the corresponding targeted countermeasures and suggestions to improve scientificity of the inland ports planning and to achieve sustainable development of inland ports.