Advanced Materials Research Vols. 838-841

Abstract: Current trends in hydrological modeling depend on spatial datasets, complex computational tasks and representation. As the need for the development of hydrological modeling capabilities have evolved, its integration with geographic information system (GIS) has provided a significant contribution to the efforts of hydrologic models. It serves the role of providing support in data capturing and improving hydrological modeling efforts by giving tools for effective analysis. This integration of GIS technology and hydrological modeling has resulted in great value and presents potential benefits to modelers and engineers. This paper reviewed critically, current trends of GIS technology in hydrological modeling. It also discussed the existing drawbacks as well as reviewed the future trends and prospects of this integration.

Abstract: With the medium of triethanolamine acetate ionic liquids and the help of cavitation effect of ultrasonic resonance, the TiO₂ collosol is prepared by the sol-gel method and being loaded on nickel foam. The TiO₂ electrodes are formed by calcinating at the high temperature. The results show that the optimal electrodes can be obtained with the medium of triethanolamine acetate ionic liquids, under the condition of high power ultrasound resonance for 15 minutes, the ionic liquid volume of 3 mL and the calcination temperature of 400 °C. After the wastewater is processed by photoelectric catalysis under the conditions of electrolysis voltage of 12V, electrode spacing of 1 cm, wastewater pH of 4 and illumination time of 90 minutes, the COD removal rate can reach 63.5%, while the decolorization rate can reach 93.6%.

Abstract: The aim of this study is to investigate the contaminant removal efficiency in wastewater when disposed by carbon fiber ecological grass. The paper analyzed the TN, TP, COD_Mn, NH₄⁺-N and SS removal efficiency when used different dosage of carbon fiber ecological grass. The research results indicated that the contaminant removal efficiency at pH=8 is higher than pH=6, 7 and 9. When DO between 5.6 and 8, the TN, TP and NH₄⁺-N removal efficiency has a highest level, the removal efficiency is 83.91%, 68.16% and 83.3% respectively. When DO between 8.1 and 10.7, the COD_Mn removal efficiency has a highest level, the removal efficiency is 57.93%. The stirring rate is important to the contaminant adsorption and removal. Consequently, selecting carbon fiber ecological grass in wastewater treatment is a good choice.

Abstract: Magnetic modified organobentonite (Fe₃O₄/CTAB–Bent) was synthesized by chemical co-precipitation method in which CTAB–Bent was firstly achieved via ion–exchange.The composite materials have been characterized by powder X–ray diffraction (XRD), Fourier transform infrared spectroscopy (FT–IR) and Scanning electron microscopy (SEM) . The results revealed that basal spacing of bentonite was increased through organic modification and the Fe₃O₄ particles synthesized which covering the surfaces of bentonite .Compared with natural bentonite, the adsorption capacity of Fe₃O₄/CTAB–Bent for Orange II was greatly enhanced and can be easily separated from the reaction medium by an external magnetic field after the treatment.

Abstract: In this study, CuO microspheres were synthesized by a facile hydrothermal method. X-ray diffraction pattern indicated that the as-prepared CuO sample is presented in monoclinic phase and field emission scanning electron microscope images demonstrated that CuO were composed of CuO nanoplatelets. The catalytic activity of CuO microspheres in the degradation of methylene blue (MB) with H₂O₂ was investigated. It was found that the degradation ratio of MB was less than 7% in the absence of CuO catalyst, while the degradation ratio can reach about 88% in the presence of CuO catalysts. It was revealed that the degradation efficiency of MB was the highest when the dose of CuO catalysts was 20 mg.

Abstract: Self-supporting pH-responsive micro porous membranes from Copolymer PVA-co-PDEAEMA were prepared via curtain coating process. The morphologies of the micro porous membranes were investigated by polarized optical microscopy. The above polymers were shown to form self-supporting membrane systems that were able to react on pH stimuli in terms of water flux.

Abstract: Using chitosan as raw material,the modified chitosan was obtained through alkylation reaction with alkyl halide, which as a carrier, Cu2O/ modified chitosan composite photocatalyst was prepared by hydrazine hydrate reduction.Using the method of X-ray diffraction and scanning electron microscope analysis, characterization of the composite photocatalyst show: Cu2O loads evenly on the modified chitosan, and the structure of Cu2O changes little, grain size of Cu2O is about 200nm~300nm.Using UV mercury lamp as the light source, alizarin red as target degradation product, photocatalytic performance of the Cu2O/modified chitosan photocatalyst was researched.The results show that: As the loaded modified chitosan produces a synergistic effect with Cu2O, its degradation rate of the dye improves in the UV mercury lamp,when the concentration of alizarin red is 50mg/L of the experimental conditions, the composite catalyst dyedegradation better than separate Cu2O catalysts and modified chitosan; absorption mainly dominates in composite photocatalyst under no light.

Abstract: 1,4-butanediol condensation can be performed with Cs-W - HPA. Cs₂H₄P₂W₁₈O₆₂ showed excellent catalytic performance for preparation of THF. In the optimal conditions, the reaction temperature was 180 °C, the reaction time was 43 min, catalyst dosage was 0.4 g, THF yield could reach 89.4%. And reused five times, the yield could reach 83.2%. HPA had the very good application prospect.

Abstract: In this paper, the macroinitiator (PVAc-Cl) was prepared from vinyl acetate telomerization reaction by using BPO as initiator and CCl₄ or CHCl₃ as chain transfer agent. Then the pH-responsive PVAc /poly (2-(dimethylamino) ethyl methacrylate) (PVAc/PDEAEMA) were synthesized via atom transfer radical polymerization (ATRP) and evidenced by FTIR spectroscopy. PVA/PDEAEMA were synthesized by alcoholysis PVAc/PDEAEMA and evidenced by FTIR spectroscopy.

Abstract: The study of compressive strength of brick is very important and valuable in Mechanical testing. In this paper, an experiment on the effect to compressive strength of flux on sludge lightweight sintered shale brick is presented in details, by studying different ratio of raw materials, finding a scientific processing method for municipal sludge and getting a new method to improve bricks compressive strength. Experiments take different ratio of municipal sludge shale brick and flux as materials, making maximum firing temperature of 950°C, finding different sludge lightweight sintered shale bricks compressive strength data, finding a suitable ratio to meet the requirements for using as load-bearing walls.