Advanced Materials Research Vols. 955-959

Abstract: This paper studied the relationship of chlorophyll-a, total nitrogen (TN) and total phosphorus (TP) concentration based on the conventional monitoring data in 2013. The results showed that the concentration of chlorophyll-a (Chl.a) had obvious correlation with TN, TP in July and August, and there was no relationship in October. Furthermore, content of nitrogen is more relevant to chlorophyll-a than phosphorus by regression analysis. Therefore, it was indicated that nitrogen and phosphorus nutrients had intimated relationships with algae growth.

Abstract: PM2.5 is one of the most important components in air pollution. It is also the focus of the most closely watched at home and abroad. Based on its small size, complex components, and strongenvironmental activity, it can be used as a carrier for chemicals, heavy metals, bacteria, toxins and carcinogens into the body. Then, as a result, it will affect Human Body Health. Heavy metals are important components of PM2.5, and the long-term accumulation of heavy metals in PM2.5 poses a great threat on human health and the environment. This paper reviewed the sources, distribution methods,chemical form, detection methods, disposal way, research progress of heavy metals in PM2.5. As a result, it provided a reference for in-depth study on the future.

Abstract: Yi River is the second longest river in Shandong Province and the largest river in the Yimeng mountain area. The quality of the water has been improved due to the measure taken by the local government. In this study, five water samples of random sites along Yi River in Yishui City were monitored by using the micronuclei in Vicia faba root tip test technique (VNMs). The results showed that the micronuclei frequencies (MCN‰) of all the five samples were approximately equivalent to the control sample. In addition, five samples, respectively 1m, 2m, 3m, 5m and 20m from an illegal sewage outlet along the flow direction, were taken for VNMs. The MCN‰ dates were 17.982‰, 13.261‰, 10.346‰, 4.074‰, 2.475‰, which indicated that the pollution was severe near the sewage outlet while at the distance of 20m from the sewage outlet the water turned good quality. Our study can give a data support for the policy of local government.

Abstract: The variations of the atmospheric visibility and its relationship to the atmospheric particles mass concentration have been studied by using the continuous visibility data of monitoring instrument FD12 from Benxi air component monitoring station in 2010. The results show that the annual mean visibility is 12.6 km in 2010, and its daily average concentration has a large variation range. The daily visibility mainly lies in 6 km to 15 km with all the observed data at the rate of above 67%. The frequency of visibility smaller than 3km and bigger than 30 km is very low with the rate below 1% of all the observed data. There has been a low value of the atmospheric visibility in winter and a high value in spring. The visibility and the atmospheric particles mass concentration show negative correlation, and the finer the particles are, the more they affect visibility.

Abstract: The amount and diversity of phytoplankton, zooplankton and benthos are very essential indexes for the marine ecology. These indexes are meaningful guidance for the regional management, sustainable development and ecological civilization. In this paper, the trend of marine ecology is researched for guiding and improve the environmental impact assessment and management in the Caofeidian marine district, Tangshan Bay. The amount and diversity of phytoplankton, zooplankton and benthos are analyzed by five years’ field data. The research results show that the marine reclamation has influence on the marine ecology.

Abstract: This study surveyed 338 the 5th and 6th grade students at an elementary school in Pingtung County, Taiwan, after they received three months education on wetland conservation. A total of 325 valid responses were received, accounting for 96.2% of the students. The data was analyzed using structural equation modeling (SEM), and the outcome showed that the structural model of wetland conservation passed the normality test and that the model had a good fit. It was understood through path coefficients that conservation attitude is a partial mediator. The total effect of conservation knowledge on conservation attitude and behavior is 0.78, and the total effect of conservation attitude on conservation behavior is 0.59.

Abstract: The modified Tessier method was used in the present study to analyze the antimony (Sb) speciation in suspended solids in mining wastewater from Ban-po Antimony Mine in Guizhou province. It was found that the residual fraction and the soluble fraction are the highest and the lowest in the five Sb fractions, accounting for 62.5% and 3% of the total respectively. The order of the five Sb fractions is: the residual fraction > the reduced fraction > the oxidation fraction > the acid-extractable fraction > the soluble fraction. The antimony soluble form in aqueous solution is mainly Sb (V), about 90% of the total. The results from the analysis by X-ray diffraction and scanning electron microscopy showed that the major crystalline forms of suspended solids are K-Mg-Fe-Al-Si-O-H₂O, Cu₃SbS₄, 3CaO·2Sb₂O₅·8H₂O, SiO₂ and the content of antimony element is approximately 2.55%.

Abstract: Nowadays zooplankton is widely used as an indicator of ecological conditions of waterbodies. This article shows the result of the research in zooplankton community of Kamenik Lake. Diversity of zooplankton community, species composition, indicating species, quantitative characteristics, trophic status and saprobity are being evaluated. Hydrochemical data is provided and a development forecast is made.

Abstract: To provide beneficial reference to the assessment of the ship pollution risk of Weihai bay sea area and pollution prevention ability. Adopting the "oil particle" model, the drift and diffusion process of oil spill from a certain shipyard in Weihai bay is simulated. By using Lagrange method, the oil film center movement locus and the oil film distribution at each time is visualized. By considering the effect of environmental factors on the behavior of marine oil spill in the three-dimension flow field, turbulence, wind guide, transport and wave breaking, the oil spill prediction model predicted the oil film drift path under the combined effect of the wind and currents, oil film affected range of the sea area and coast. The expert review meeting organized by maritime agencies recognized the oil spill prediction result analysis by using this oil spill model.

Abstract: Sequencing Batch Reactor (SBR) wastewater treatment process has lots of characteristics, such as randomness, time-varying characteristics, complexity and so on. In order to solve the above problems, a predictive PID control method based on DMC and ordinary PID for SBR wastewater treatment process dissolved oxygen (DO) control was proposed. The simulation studies were conducted with the MATLAB in a sewage treatment plant. The results showed that the proposed predictive PID control method was robust and jamproof. Meanwhile, the wastewater treatment system also had a strong capacity of shock load.