Advanced Materials Research Vols. 1033-1034

Abstract: This paper focus on the analysis of the slurry foam of the sinter band plant Wet Flue Gas Desulfurization (WFGD) process, and put forward suggestions according to the actual conditions of the Steel Works. The experimenter compared the actual operating parameters of slurry and system design parameter. Then found out the main incentive to form foam on top of the absorber’s slurry tank. This paper analyzed the major constituents of overflow foaming of WFGD system. Analysis results indicated that it is the same composition of byproducts gypsum of WFGD. So the experiment focus on the research of slurry constituents of the absorber. The result of basic data analysis shows that the slurry density of absorber is 1.25Kg/L which exceeds the maximum design value i.e.1.15Kg/L, and the Chloride concentration is 80000mg/L which exceeds the maximum design value i.e. 15000mg/L. The supernatant of slurry is formed of colloidal solution and the solid percentage of supernatant slurry is 10.64% (Weight percentage). Meanwhile the supernatant slurry shows Tyndall phenomenon significantly, and the remaining solution indicators are much higher than the design value. For identification purpose, the experimenter had an experiment about desulfurization slurry and found the relationship among solid content, supernatant concentration, foaming ability and foaming stability. Experimental results show that the foaming ability get strong first and then get weak with the increase of the solid content and the foaming ability get weak gradually with the decrease of the concentration of Mg²⁺and Cl^-. The slurry almost has no foaming when the solid content is less than 10% and the concentration of Mg²⁺ less than 1000mg/L and the concentration of Cl^- less than 20000mg/L.

Abstract: Middle Route of South-to-North Water Transfer Project main canal is grand supplied channel, it has the high requirements for transfer water reliability, so seepage control is particularly important for the channel slope along canal. According to conditions of seepage field and transformed relations of permeability coefficient to respectively simulate the seepage of channel slope with the homogeneous isotropic seepage field and the homogeneous anisotropic seepage field, the mathematical model and finite element model were created for the seepage of the filled channel slope with stratified and rolled, using ANSYS thermal analysis module for steady seepage analysis. Compared analysis shows that the seepage of the stratified and rolled channel slope in homogeneous anisotropic of seepage field is more intense than in homogeneous isotropic of seepage field, the analysis of the stratified channel slope by the homogeneous anisotropic seepage field matches the actual and is also more reasonable.

Abstract: Ordered mesoporous materials, because of its specific high surface area, a large pore size and uniform pore size distribution, reflects its more obvious advantages in the adsorption. The study describes the adsorption behavior of disinfection by-products such as dichloroacetic acid from aqueous solution using ordered mesoporous carbon in different pore size distribution. Ordeded mesoporous carbon was synthesized via the evaporation induced self-assembly method with Pluronic F127 as a template and phenolic resin as a carbon source and employed to evaluate the effects of initial concentration, contact time, pH and temperature on the removal of dichloroacetic acid in batch experiments. In this study, the method of controlling the aperture of ordered mesoporous carbon is changing the polymerization time of phenolic resin which can change the relative molecular weight and the length of molecular chain of phenolic resin. The samples were characterized by scanning electron microscopy (SEM) and N2 adsorption-desorption. These analyses reveal that the mesoporous carbon have ordered structure. The experimental results indicated the ordered mesoporous carbon in different pore size distribution showed significant differences in the adsorption of dichloroacetic acid and their adsorption capacities are 5.80, 20.62, 16.24 mg/g, respectively.

Abstract: The amino propanoic acid chelating fiber (APACF) was prepared by immobilizing tetraethylenepentamine (TEPA) and propionic acid on polypropylene-graft-styrene (PP-g-ST). The synthetic conditions of amino PP-g-ST fiber and APACF were optimized by the way of L₁₆(4⁵) orthogonal experiment, and the optimizing reaction conditions were obtained. APACF was characterized by FTIR, and the changes of IR spectrum verified the introduction of carboxyl groups to the raw material. The experimental results revealed that the APACF can be used to remove and enrich copper from aqueous solution.

Abstract: We herein constructed a electrochemial sensor for T4 DNA ligase detction. In the sensor, the hairpin dsDNA terminal-labeled with 4-((4-(dimethylamino)phenyl)azo)benzoic acid (dabcyl) and thiol group was immobilized on Au electrode surface as the probe by Au-S bond, and the CdS nanoparticles surface-modified with β-cyclodextrins (ZnS-CD) were employed as electrochemical signal provider and host-guest recognition element. After T4 DNA ligase repairing single-strand breaks in duplex DNA, the dsDNA probe underwent a significant conformational change, which forced dabcyl away from the electrode. As a result, formerly shielded dabcyl became accessible to host-guest recognition between β-cyclodextrin and dabcyl, thus the target repairing event could be sensitively transduced to electrochemical signal provided by ZnS-CD.

Abstract: Tumor therapy using the high-energy radiation has evolved over the decades as typical non-invasive treatment method due to its advantage compared with surgery. But, the radiotherapy can damage or destroy normal cells as well as destroying tumor cells and cause side effects of treatment. Even though most side effects are temporary, these effects can be extremely fatal for patient. Therefore, the exact measurement of the exposure dose of patient during radiation therapy is very important for patient safety. In the case of the conventional fiber-optic radiation sensor that consists of a scintillator for high-energy radiation dosimetry, additional correction is necessary due to the quenching effects of the scintillator. In this study, we measured the exposure dose of the high-energy proton beam without the scintillator by using the Cerenkov radiation that generated inside the plastic optical fiber. As a result of this study, we confirmed a Bragg peak of the proton beam without a scintillator. Also it was in good agreement with the result of the ionization chamber.

Abstract: The continuous flocculator described in this article refers to a kind of continuous flocculation device designed to flocculate fermentation liquid. The honeycomb continuous flocculator is composed of a vessel and built-in trapezoid subassemblies, which divide the space within the vessel into multiple honeycomb channels. The length ratio between the longest diagonal of the regular hexagon and the axial length of the channel is within the range 0.01–0.04; and the internal surface roughness (Ra) of the channels should be 0 < Ra ≤ 0.2 μm. In contrast to current flocculator designs, the channels of the honeycomb continuous flocculator could control the floc grain size, grain fineness distribution in the fermentation liquid and flocculating time and decrease the flow resistance of the flocculating fermentation liquid and increase handling capacity. These capabilities improve solid-liquid separation efficiency for fermentation liquids. The flocculator could be used either for purification of industrial fermentation liquids or sewage treatment.

Abstract: The analytical method was established for identification of 100% cotton fabric by Raman spectroscopy. 100 samples were analyzed directly by Raman spectrometer with a 1064nm laser source. 1120-1180 cm^-1,1320-1400cm^-1 and 1560-1600cm^-1 were selected as important spectral regions by Random forest method. A Random forest model was established with 65 trees and 80 training samples. The result showed that different kind of textile can be identified by Raman spectroscopy coupled with random forest method.

Abstract: The distance from the blast center will directly change the blasting seismic wave wave’s energy property and eventually influence the structure’s response to the wave. To study its influence on the time-frequency (t-f) characteristics of blasting vibration signals, the single-hole blasting vibration test was conducted in Jinduicheng Open Pit Mine. Based on the measured data, wavelet analysis was used to decompose the measured signals, and signal segments at different frequency bands were got. RSPWVD quadratic form time-frequency analysis method was applied to analyze the segments’ t-f characteristics, and the domain frequencies of the blasting seismic waves under different distances from the blast center and the energy distribution and duration of the frequency bands were collected. The results show that the distance from the blasting center has a big impact on the domain frequency of the blasting seismic wave. With the increasing of the distance, the domain frequency reduces, its duration extends, the percentage of energy at the low frequency in the total energy increases and the duration of the frequency band extends. The research results provide the analysis base for understanding the influence of the distance from the blast center on signals’ t-f characteristic and studying vibration resistance and vibration reduction.

Abstract: In this paper, a conjugate interference filter which could be used in gas sensing is presented .The filter consists of two large spot collimators and a gas etalon which has two separate cells:absorption gas chamber and non-absorption gas chamber. When cascading the broadband light to the filter , only light absorbed by the target gas can pass through the filter and the spectrum of output light matches well with the absorption spectrum of target gas.By changing the target gas in the absorption chamber ,filter for various kind of gases can be implemented. In this paper, acetylene is selected as the target gas and the spectrum of light through the filter completely matches the absorption peak of acetylene after parameter adjustments.