Advanced Materials Research Vol. 664

Abstract: Build strata three-dimensional structure model By GMS (Groundwater Modeling System) software about the Feng He River basin and on the basis of it place the groundwater water model to better show the groundwater level, buried depth, thickness, etc., at the same time display the locations of groundwater cordon. Groundwater cordon can be cut along with the strata and water and displayed on the cutting profile. Superimpose the model and satellite topographic map, so can select a specific position cutting three-dimensional model in order to understand a specific location or area of underground water level, water thickness, etc. Through the real-time update of groundwater level data to understand the utilization of groundwater mining in the study area, ensure the sustainable use of groundwater resources and realization of three dimensional dynamic monitoring of groundwater resources in the study area.

Abstract: Through the interpretation of rural environment contiguous remediation documents and the improvement of rural environment contiguous remediation in 2010-2011, we summed up three basic principles of the rural village level wetland sewage treatment system in Wuhan: principle of reaching discharge standard, building education and promotion platform and construction of two-oriented society. It also described some of the cases, and proposed the further elaborated work.

Abstract: We determined that there are 5 door 35 species of phytoplankton, 6 Galaxy ecological agriculture co., LTD, The average biomass liveweight is 0.6006 mg/l. The reason of less species of plankton and low liveweight of biomass in the system is that the ecological environment of the system is not suitable for general plankton's survival and growth. Therefore, the rural village wetland sewage treatment system has certain inhibition on plankton. On the system engineering designing we shouldn’t consider the factor of plankton.

Abstract: Municipal solid waste incineration (MSWI) fly ash was regarded as one kind of hazardous waste due to the enrichment of heavy metals (Zn, Pb, Cd and Cu), which should be removed from the ash or stabilized prior to final landfill disposal. Extraction with phosphoric acid is a conventional method of safe treatment of fly ash. In this work, influence of phosphoric acid concentration and liquid to solid ratio on removal efficiency of the four heavy metals was investigated. It was found that phosphoric acid was efficient in removing Pb, Zn and Cu but less efficient in removing Cd. Removal ratio followed the decreasing sequence of Pb >Zn > Cd > Cu for acid extraction using phosphoric acid, quite different with that for sulfuric acid. In comparison with sulfuric acid, phosphoric acid was more effective in removing the four heavy metals.

Abstract: This study aims to develop a methodology for thermal characterization of APC (air pollution control)fly ash using XRD (X-ray diffraction). It performed XRD analysis as a function of temperature between room temperature and 1200 °C. It is found that major mineralogical components of fly ash involve SiO₂, CaCl₂, Ca₃Si₂O₇, Ca₂SiO₄–0.35H₂O, Ca₉Si₆O₂₁–H₂O, K₂Al₂Si₂O₈–3.8H₂O and AlCl₃–4Al(OH)₃–4H₂O. Glass phases account for around 57%, which is conducive to reduction of energy in recycling of the ash. Salts decompose firstly with increase of temperature and then oxides derived from the decomposition process react with SiO₂, forming silicates, calcium-silicates and aluminosilicates.

Abstract: Solid Waste Pollution Control is one of the main special courses offered to students whose major is Environmental Engineering. It aims to let students know basic knowledge and control technologies of solid waste pollution, so that they can solve problems on solid waste treatment and disposal. With increasing generation of solid waste (municipal solid waste and industrial solid waste) in China, solid waste control becomes one of the focus environmental problems facing our country, which depends on efforts of environmental professionals. Solid waste control technology has seen a fast development in recent years. In order to keep up with solid waste control nowadays, it is necessary to develop this course to improve teaching effects. Based on analysis of the current conditions of this course, the paper offers a construction plan for the course in the following aspects: adjustment of the course teaching content, enrichment of teaching methods and teaching mode, preparation of test database and exercise database and suggestion of ways to increasing teaching effect of this course.

Abstract: Green barriers of western countries restrict the product export of developing countries. This is a new problem on international trade recent years. After China s entry into WTO, green barriers have become a biggest barrier in Chinese foreign trade. This paper provides the system shortage about Chinese green barriers. So China should launch a campaign to construct the system of green barriers according to Chinese Economic backgrounds. This paper also proposes some law countermeasures to set up and improve the Chinese green barrier system.

Abstract: Anthraquinone-2,6-disulfonate (AQDS) is a redox mediator that may modify the expression of different heterotrophic microbial functions. In this study, by means of cyclic voltammetry in an unbuffered, aprotic medium, the electroactive behavior of AQDS in the presence of natural redox effectors was assessed using an electroactive humic fraction model, named f50, isolated from virgin clay-limestone soil. When f50 was added to the AQDS solution, the electrochemical behavior was different, with a cathodic peak shift corresponding to AQDS.-  AQDS2- reaction towards the most negative potentials and a similar behavior in its anodic counterpart.

Abstract: Exploring the best mode of fly ash reclamation by the tests of water content, water retention curve, PH value, monitoring of wheat growing and wheat yield in different conditions of covered soil’s thickness. The results show that if the thickness of the covered soil’s layer between 24cm to 40cm,the covered soil has the best ability of water saving and supplying, the lowest cost for reclamation and the highest yield, so we can get the best benefit.

Abstract: Environment is being damaged seriously by harmful wastes of chemical laboratory. This article synthesized the category and endanger of general wastes in chemical laboratory and provided several simple treatments According to their categories and properties, we provided the process diagram for general wastes and offered a proposal about management.