Advanced Materials Research Vols. 396-398

Abstract: Three bis-acetylferrocene schiff bases have been synthesized and characterized by IR, 1H NMR, and elemental analysis, the results conformed well with expected structures. The synthesized compounds were screened in vitro for their antimicrobial activity against three Gram-negative (Escherichia coli, Pseudomonas aeruginosa, and Salmonella typhi) and two Gram-positive (Bacillus subtilis and Staphylococcus aureus) bacterial strains. The results showed that these compounds are show excellent antimicrobia activities against Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi ,Bacillus subtilis,Staphylococcus aureus.

Abstract: The effective storage time (i.e. storage life) of constant viscosity natural rubbers prepared with hydroxylamine hydrochloride, hydroxylammonium sulphate, hydrazine hydrate, aniline and semicarbazide hydrochloride respectively were investigated with heat accelerated storage aging combined with differential scanning calorimeter(DSC) method as well as the heat aging life equation. The results show that the effective storage time of constant viscosity natural rubber prepared with hydroxylamine hydrochloride is 19.2 years at 30°C, 39.4 years at 25°C and 82.9 years at 20°C. The effective storage time of constant viscosity natural rubber prepared with hydroxylammonium sulphate is 16.3 years at 30°C, 32.6 years at 25°C and 66.5 years at 20°C. The effective storage time of constant viscosity natural rubber prepared with hydrazine hydrate is 42.5 years at 30°C, 85.9 years at 25°C and 177.9 years at 20°C. The effective storage time of constant viscosity natural rubber prepared with aniline is 30.4 years at 30°C, 66.7 years at 25°C and 150.2 years at 20°C. The effective storage time of constant viscosity natural rubber prepared with semicarbazide hydrochloride is 13.5 years at 30°C, 27.4 years at 25°C and 57.1 years at 20°C.

Abstract: In this work, acrylic acid and N-methylolacrylamide were used as functional monomers for preparation of styrene-acrylic emulsion, in combination with styrene and acrylic ester, as primary monomers. Also, 4 optimized emulsifier blends, including OP-10/FR-1, ER-30/FR-1, S-201/RE610, and CO-630/OF-40, were employed. A series of styrene-acrylic emulsion for automobile filter paper was successfully synthesized by preemulsification and semicontimuous copolymerization methods. The dilution stability, electrolyte stability, freeze-thaw stability, viscosity, pH and particle structure of emulsions after different storage time were monitored; the water resistance, bursting strength, stiffness of automobile filter paper after application were tested to study the effects of storage time. The results showed that the emulsions had good storage stability, while using all the 4 emulsifier blends. The pH value of emulsions decreased slowly, viscosity, dilution stability, particle size and distribution of emulsions were good; stabilities of freeze-thaw, storage and electrolyte changed slightly. Emulsions from emulsifier blends of OP-10/FR-1, ER-30/FR-1 and CO-630/OF-40 gave good water resistance property to filter paper. After 6 months, the paper bursting strength was almost unchanged, although the emulsion was stored for 6 months. The stiffness of papers reached the highest value, when the emulsion was stored for 2 weeks, and kept consistent until storage time of 6 months.

Abstract: The Fe/Cu-cross-linked montmorillonite catalysts were synthesized with Linan Na-Mont and characterized by BET, SEM, XRD. Liquid-phase oxidation of benzyl alcohol to benzaldehyde by hydrogen peroxide over Fe/Cu-PILC catalyst in the absence of solvent has been thoroughly investigated. The influence of reaction conditions has also been studied. The results show that Fe/Cu(100)-PILC has excellent activity and reusability in the process. The active oxygen species in the reaction is from the absorbed oxygen of Fe/Cu-PILC.

Abstract: With the increase of locomotive traction tonnage and train speed improvements, the DF4B locomotives have been in heavy load and high speed working condition for long time, while the lubricating oil dilution problem has not been solved. We have been in the research of the three-generation oil dilution of theDF4B locomotives in laboratory simulation experiment, especially in the oil addition experiments of the kinematic viscosity, and got a numerical trend graph and regression empirical formula. Through the diluted oil adjusting agent experiment, we inspected DF4B locomotives diesel engine for a period of tracking, and discovered that the modified oil has little influence on locomotive riding quality, thereby providing the new thought of reusing and saving the oil resources.

Abstract: In situ laboratory studies were carried out in simulated reactors to evaluate the potential of calcium nitrate, Polyaluminium Chloride (PAC) and calcium peroxide for remediation municipal river sediment. Calcium peroxide could increase the dissolved oxygen concentration (DO) of water for long time (8 weeks). It would optimize the anoxia environment of sediment and be propitious for remediation of sediment. The disadvantage of calcium peroxide was that pH (8.6) would rise slightly and accelerate NH3-N release. Spraying poly-aluminum chloride also could prohibit phosphorus release from sediment. But the remediation effect might be weakened due to disorganization of the aluminium floc after period of time. Phosphorus release from sediment injected calcium nitrate was almost stopped during the experiment. Calcium nitrate could greatly improve the ability of bio-treatment properties for sediment. After 28 weeks of treatment, the TN concentration with dose of 70g per square meter NO3-N could reduce to common level compared to blank reactor by denitrification. It makes in-situ chemical remediation technology by calcium nitrate injection become possibly.

Abstract: Using crude oil degrading strain SY2 isolated from soil contaminated by crude oil as the starting strain, the optimum culture conditions of strain SY2 were obtained by the experiments of carbon source, nitrogen source, inorganic salt, and cultivation temperature. The biodegradation rate of crude oil can reach 43.20% under the condition of without the addition of inorganic nutrients. The enzyme-catalyzed kinetic model of strain SY2 degrading naphthalene was also established. The model was applied to guide the practical application of the crude oil degrading strain SY2.

Abstract: Treatment of polluted river water with great variations of water quality using pilot-scale Surface Flow Constructed Wetland (SFW) was studied in this paper. The main results show that: When the influent concentrations of COD_Mn and NH₄⁺-N were 11.69~60.00 mg•L^-1 and 1.37~20.18 mg•L^-1, the COD_Mn and NH₄⁺-N removal rate of SFW which planted Lythrum salicaria, Canna indica, Typha latifolia and Scirpus locustris were 26.44％、40.12％、46.71％、28.23％ and 64.27％、70.49％、66.78%、58.52%. Typha latifolia and Canna indica have stronger ability for purifying pollutants. Scirpus locustris has strongest ability of overhead flooding, it can resist inundation over 22 days and still live. Lythrum salicaria has lowest ability of overhead flooding, it only can resist inundation 7 days.

Abstract: A novel chemical deposition process based on aurous-glycine complex was reported in this paper. By using single factor’s and orthogonal experiments the optimal plating index has been gotten and they are: pH=4~6,[Au]=1.5~2.5 g/L , temperature 40~55 Ċ and plating time 6~8min respectively. Deposition results and quality inspection of the plated panels show that its plating rate is as fast as that of the gold-cyanide complex and reaches 0.020~0.025 um/min, and the quality related parameters including appearance, adhesion power and gold thickness can meet the standard of the modern PCB products.

Abstract: Due to great variety additives and disposal difficulty, chemical method, biochemical method and solidification are adopted to treat fracturing wastewater in oil field. These processes easily bring about shortcomings, including high cost and secondary pollution. Studied on the treatment of fracturing wastewater of 4# well in Sichuan Oilfield by modified bentonite loading TiO2-Ag2O composite catalyst, COD removal rate is determined for different condition of pH value of solution, adding content of TiO2, inflating volume and light application time. The optimal condition is obtained as follows: pH value of solution is 3, adding content of TiO2 is 0.4-0.5%, inflating volume is 15L/min and light application time is 3h. Under this condition, COD removal rate of fracturing wastewater is 58.1%. The composite catalyst performance is stable and without secondary pollution. It is reusable by high temperature activation, so it can reduce wastewater treatment cost, and should be widely applied.