Applied Mechanics and Materials Vols. 641-642

Abstract: The modified adsorbent was modified by amine reaction with brewer's grains that using epichlorohydrin as etherfying agent,N,N-Dimethyl formamide as dissolvent, triethylenete tramine as cross-linking agent.The simulation of Cr (VI) wastewater as treatment object, through the optimization of synthesis conditions of Cr (VI), the optimal synthesis process was obtained.The results showed, 4 g brewer's grains, add 15 ml epichlorohydrin and 15 ml N,N-Dimethyl formamide stirring 1h at 85 °C. Then added dropwise to 4mL triethylenete tramine, mixing reaction 1h at 85 °C. The maximal absorption rate got 99.81%.The modified brewer's grains of amine surfactant modified is a promising treatment of chromium wastewater biological materials.

Abstract: With the rapid development of modern society and economy, environmental problems have become increasingly prominent, especially the city water environment worsening, exacerbating the shortage of water resources, affecting people's physical and mental health, which has become the serious restriction factor of sustainable development of the city. This paper mainly discuss from the introduction of city sewage treatment technology and methods.

Abstract: MBR technology has been widely used in northeast China's leachate treatment projection for its obvious technical advantages. However, the complex nature of the Northeast leachate as well as relatively more calculations design of MBR process, became the key to the success of the project. This article in view of the present our country MBR treatment process of domestic refuse landfill leachate treatment of some design problems and puts forward some personal views and suggestions,, for example the MBR process calculation method of reference.

Abstract: The land runoff of major cities is a significant factor in pollution of the hydrosphere. Sorption-filtration treatment technology of large volumes of water runoff most cost-effective, it is as deep purification technology. Their application in the complex composition of runoff from urban areas gives the best results in combination with the technology pre-separation main quantity of suspended solids and emulsified oil products in different kinds of traps and sumps.

Abstract: The acid mine drainage has the widest pollution range and biggest harm degree, which forms the potential corrosion hazards to sewage dams in mental mine. Based on the investigation and analysis of the acid mine drainage, the evolution law influence of physical and mechanical properties and leakage mechanism of sewage dam is revealed under the action of the acid mine drainage. In order to prolong its service life and insure the safe operation of the construction engineering, the program of concrete anti-seepage wall with coal fly ash is adopted, which can improve the impermeability and structure of concrete, enhancing the anti-seepage wall durability under acidic environment, providing the basis of scientific data and technical basis for acid mine water environment of basic construction.

Abstract: In this paper, under the assumption of homogeneous rock conditions, the fracture opening and propagating theories, the boundary element method was used to simulate the interaction between the fracture in the processing of the simultaneous multi-frac treatments. The research shows that simultaneous multiple fracturing change the direction of crack extension, which lead to direction change of the in-situ principle stresses. The fractures attract or repel each other in different horizontal wellbores /fractures configuration.

Abstract: This paper analyzed the corrosion environment of Missan oilfields and investigated the oilfield country tubular goods used in other similar oilfields. Summarized the effect of partial pressure ratio of H₂S/CO₂ and Cl-to the corrosion behavior of OCTG. This paper concluded the service condition, test results and anti-corrosion mechanism of carbon steel, low-chrome steel, modified martensitic stainless steel and nickel alloy. Finally arrived at conclusion that the nickel alloy can meet the requirement of Missan oilfields, some literature reported that the modified martensitic stainless steel can apply in H₂S/CO₂ environment. In the condition that be easy to replace the tubular, carbon steel and low-chrome steel tubular can meet the requirement with corrosion inhibitor.

Abstract: In order to quantitatively analyze the contents and distribution of the moveable oil in tight oil reservoir, this research has done experiment on 12 representative cores. The total moveable oil saturation is between 5.17% and 43.30%. And the big throat controls less contents of moveable oil than the small one, throat radius between 0.02μm~0.1μm plays the leading role, and nanometer throat controls most of the pore space of moveable oil. Comparing with permeability higher than 0.1mD, permeability between 0.03mD~0.1mD, permeability between 0.01mD~0.03mD, permeability lower than 0.01mD, the first one has the biggest content of the total moveable oil, and its moveable oil is mainly controlled by throat radius between 0.02μm~1.0μm, while the moveable oil of permeability between 0.01mD~0. 1mD reservoir is mainly controlled by throat radius less than 0.1μm, and the other reservoir is mainly controlled by throat radius between 0.02μm~0.05μm.

Abstract: To study the slimes engineering properties of Pingguo Alumina Industry Company bauxite tailings that accumulated under natural conditions, Site test and laboratory test are used. Test results show that the oxide of the bauxite are alumina, silicon dioxide, ferric oxide; the mineral composition are mainly kaolinite, hydrogarnet and hematite; the grain of the slimes are silt and clay with a small amount of sand; the microscopic structure of bauxite is "super impracticable structure"; the total pore volume is 0.441ml/g; the total pore surface area is 6.747m²/g; the specific surface area of the grain is 131.53m²/g; the main ion exchange is K⁺ and the exchange capacity is 0.26-0.32mg/g; the average coefficient of permeability is 3.05×10^-6cm/se; the average moisture content is 130.3%; the average limit of liquidity is 57.1%; the average coefficient of compressibility is 0.79; the avera-ge cohesion is 23kPa; the average internal friction angle is 10.2°, so the slimes is high liquid limit, high compression and low shear strength soil; the water holding capacity of the slimes is 79~93%; the slurry concentration which had stacked more than 18 months is 49.92%, so the slimes is slurry.

Abstract: A new type of humic acid acetamide FLHA was synthesized by chemical modification of humic acid with long chain fatty amine, and the effect of humic acid acetamide on the rheological properties of gas-to-liquid (GTL) based drilling fluids was investigated. The results indicated that FLHA had good capacity of filtration reduction under 150 °C. Moreover, FLHA can improve the stability of GTL-based drilling fluids. As a result, FLHA is an good fluid loss additive for GTL-based drilling fluids, and it can optimizate drilling fluid system formulation to make drilling fluids have good rheological properties, filtration properties and environmental protection function.