Advanced Materials Research Vol. 800

Abstract: The composite TiO₂/natural cotton nanofiber materials were prepared by electrospinning and RF magnetron sputtering. TiO₂/cotton cellulose composite nanofibers were characterized by the SEMTEM and IR , Results show that the deposited TiO₂ film consists of particles uniform in size (510 nm) ,the possibility of mechanism for the growing of TiO2 is proposed.

Abstract: In this paper, the current hazardous waste disposal methods of heavy organic matter were reviewed and the craft process of molecular distillation technology on distillation residue, recycling and reduction of heavy and dangerous waste organic matter were analyzed. The yield and the influence on product viscosity of molecular distillation separation heavy resid under different technology conditions were studied and the results showed that the technology conditions of molecular distillation separation heavy resid is residual pressure 10 pa, temperature 250 oC, blown film machine speed 230 r/min. the properties of the oil distillated met the national standard of wax oil. The goals of using molecular distillation recycling waste organic matter and heavy resource waste reduction were achieved.

Abstract: Monitoring of PM2.5 is the emphasis of atmospheric environment management, and the first thing to do is the choice of monitoring sites. In this paper, we took Beijing as an example for its more serious PM2.5 pollution. Priority analysis on monitoring sites of PM2.5 was proceeded with the algorithm TOPSIS, and the 30 basic monitoring points was optimized into 11 effective and representative monitoring points. The model been used is simple, scientific and practical and there is a great sense of promotion. Keywords: PM2.5, monitoring sites, Priority Analysis, TOPSIS algorithm.

Abstract: Four photosynthetic bacterium Rhodopseudomonas spp., QDS₂, QDS₃, QDS₄ and QDS₉, were isolated and screened from the bottom sludge of Qingdao coast. In order to get a mass of PSB, we successfully optimized the culture conditions of four strains by orthogonal experiment and obtained the best culture conditions.

Abstract: The regularities of carbonation in the process of CO₂ capture were investigated using ammonia solution by laboratory-scale and bench-scale device. The research showed that the lower volatility of NH₃ and higher rate of carbonization in solution could be achieved with ammonia concentration ranging from 10 to 16 wt%. The emission of ammonia accelerated with the increasing of flow of flue gas, and the bubbling function of air was apparent in a lower CO₂ volume fraction, which has an adverse effect on carbonation of solution. Benefits of environment and economic could be achieved in CO₂ capture using ammonia solution so long as appropriate ammonia concentration, the flue gas flow and volume fraction of CO₂ were determined.

Abstract: With the development of printing industry, more and more waste ink appears. Currently, most wastes were dealt with by incineration or landfill, which brought great pollutions to the environment. Based upon co-boiling distillation, grinding, and toning, a method can convert waste ink into black for reuse, which reduces environmental pollutions from wastes.

Abstract: Low-grade coffee beans (LCBs), a waste produced in large quantities by the coffee industry, was investigated as a potential low-cost adsorbent for the removal of methylene blue (MB) from wastewater. The waste was characterized by SEM analysis and FTIR spectroscopy. Equilibrium and kinetic experiments were performed to study the adsorption process. The equilibrium data were found to be well described by the Langmuir model, from which a maximum adsorption capacity of 476.2 mg g¹ was derived. A half-adsorption time ranging from 12.5 to 96.2 min was estimated by fitting the experimental kinetic data to the pseudo-second-order model.

Abstract: Waste rubber powder (WRP) is global concern, with the development of rubber industry. However, WRP with three-dimensional structure is insoluble and nonmelting and doesnt blend with raw rubber very well. Before added into raw rubber, WRP should be modified. In this paper ,the modification methods of WRP which contain grafting, sol-gel and reactive gas treatment method,through the unbroken three-dimensional network are described.

Abstract: In this article, the classification and effects on environment of deicing salt are described, and the total components of two sorts of deicing salt commonly used in Beijing are analyzed, then we collected soil samples in Beijing’s main roads and areas, determined the soil pH and electrical conductivity, the results show that the value in roadside soil significantly higher than that in background. In addition, the soil pollution discipline in Beijing was studied.

Abstract: Using recycled coarse aggregate of Class I to get the high-strength class concrete block, using cycled coarse aggregate of Class III to get the concrete block whose strength level meets the requirements and to get concrete block that has excellent thermal insulation properties, to meet the needs of the diverse market. Finally, through the analysis of the production process and detection data, we can make a conclusive, provide a theoretical basis for the use of construction waste, and provide technical support for the production.