Applied Mechanics and Materials Vols. 522-524

Abstract: The aim of this paper is to analyze the characteristics of organochlorine pesticides (OCPs) residues in vegetable soils from the middle of Yuanmou. 12 surface soil (0~20 cm) samples of vegetable fields soil were collected and 18 types of OCPs in soil were analyzed by gas chromatography Results show that excepting for α-endosulfan, endrin, aldrin, o,p’-DDT and p,p’-DDT, other 13 types of OCPs was found with different degree in all the samples. The detection rate of 18 types of OCPs was nd~100%, the residue level was nd~11.76 μg•kg^-1, OCPs residues were main chlorthiepin sulfate, HCHs and dieldrin. Residues of endosulfan, HCHs and dieldrin in the soils might come from the old usage and residues of heptachlor might come from the recent usage. Contamination of OCPs in soils from the middle of Yuanmou were relative lower than most areas in south of China.

Abstract: In this paper, a systematic method is used to evaluate the comprehensive carrying capacity of marine reclamation with the predictive data of hydrodynamics, ecology and sediment. The predictive data are obtained by the numerical simulated results of hydrodynamics, water exchange, ecological loss and sediment. These data are coupled and input into a nonlinear set pair coupling assessment model for the predictive comprehensive carrying capacity assessment of marine reclamation. This method is calibrated by case study of Longqi Bay in Jinzhou China. This research results show that the predictive comprehensive carrying capacity assessment method is essential for guiding the marine reclamation.

Abstract: Based on the protection cost method, shadow engineering method, and some other discounting methods, the economic losses caused by the environmental damage was equivalent to specific monetary value. And put these methods into the environmental evaluation problems of Xibao railway line construction. After application, it plays an important role in the multi-objective railway location decision-making.

Abstract: Assuming in the perfectly competitive market, using the optimal control theory and making the social welfare as the maximization target, the paper studies on environment control which impacts the optimal extraction path of exhaustible resource. The special case result shows that: reserve and the changes of environment capacity function and curve are influenced by original reserve, discounted value, the absolute ratio of green environment flow to resource extraction quantity, and marginal cost.

Abstract: green manufacturing is the reflection of the human society sustainable development strategy in modern manufacturing. This paper firstly introduced the concept and connotation of green manufacturing. And then analyzed the green manufacturing strategy implementation process exists some barriers such as the market, the organization and the technologies. And secondly corresponding researched the influence mechanism of the implementation of green manufacturing of the market barriers, the organizational barriers and the technical barriers. Finally detailed studied the key technologies of the green manufacturing, such as the entire life cycle of products from design, material selection, production, packaging, use to scrap process.

Abstract: To solve transferability and spatial-temporal variability problems of ecological flow (EF) criteria existed in traditional Tennant methods, a new modified Tennant method was proposed. Considering the temporal variability and influence of extreme flows on average annual flow, the EF criteria for every month and water year were set as variables, and median monthly flow was taken as the optimum EF ceiling. Considering transferability and spatial variation of ecological objectives in different water function zones, the mean of monthly flow under 95% guaranteed rate and minimum monthly flow was used as the minimum EF. To avoid arbitrary use of EF criteria at all levels, the idea of arithmetic progression was introduced. On achieving satisfactory verification, the new approach was applied in the Hanjiang River as a case study. It is found that this new approach is reasonable with excellent spatial-temporal variability.

Abstract: In order to know about the variation of PAHs, PCBs and OCPs of sludge in landfill, discover the factors influencing the contents of PAHs, PCBs, OCPs and provide the scientific basis for the agriculture reuse of aged-sludge, the variation of PAHs, PCBs, OCPs contents and influencing factors in sludge landfill were studied in this paper. PAHs concentration of different landfill periods rang from 6.645 to 10.008 mg·kg^-1 and show an increasing tendency with the increase of landfill duration. PAHs are mainly composed of more than four benzene-based compounds, and less than three benzene rings compounds contents of PAHs are relatively low. PCBs concentrations rang from 15.655 to 25.569 μg·kg^-1 and present a decreasing trend with the landfill time, which far less than the standard of 0.2 mg·kg^-1. PCBs at the beginning of the landfill are mainly composed of the 3-Cl and 5-Cl compounds. In the late of the landfill, 2-Cl compounds increase significantly. The range of OCPs concentration is 1.78~2.37 μg·kg^-1. The main factors affecting the PAHs, PCBs and OCPs contents are microbial degradation and transformation. Analysis of the pollutants sources indicate that PAHs in sludge are mainly derived from the waste water of refinery, coking plant, gasworks, smelt plant and pitch plant. Chemical industry, timber process and electricity industry are the main sources of PCBs and OCPs in sludge.

Abstract: Recently, BIM (Building Information Modeling) became mandatory in Korea, and BIM started to be implemented in construction area. It is a design tool for maximizing the efficiency of design, construction, and maintenance throughout the entire lifecycle, but there are not many studies about the demolition wastes (DW) in the demolition stage. This study gathered basic data concerning the development of a database of DW disposed in the demolition stage using BIM-based building material database. For this, a BIM software, ARCHICAD, and construction material categories of the item list system of the PPS (Public Procurement Service) were analyzed to select major building materials. Based on the analysis, the disposal routes were analyzed considering the characteristics of DW. The database of DW was developed by examining the disposal routes of 52 major construction materials selected according to the characteristics of each material during demolition and selecting 7 major DW.

Abstract: This paper first summarized red mud utilization in the production of building materials, recovery of valuable metals, soil improvement and waste gas and water control etc, evaluated the status and trend of red mud utilization in the ways mentioned above, and prospected thepractical and economical utilization direction of red mud in the end.

Abstract: The disposal of waste textiles has been widely concerned in economic life. With the development of economy, more and more textiles are produced, consumed, discarded and result in a large number of waste textiles, If waste textiles can be put into cyclic utilization, we can save resource consumption, promote ecological protection. More than 95% waste textiles have been reused in the world. In China, existing textile policies and regulations are not comprehensive, recycling channels are not sufficient, peoples consciousness of protecting environment is backward. Advanced experience of waste textiles disposal in developed countries will provide a beneficial reference to formulate scientific strategy of waste textiles disposition in China.