Advanced Materials Research Vols. 393-395

Abstract: Hyperbranched polymer with different contents of terminal amino group synthesized with succinic anhydride and DETA through the molten polymerization method was used in the dying process of microfiber synthetic leather substrate as color fixing agent. The effect on dye-uptake, surface chromas of microfiber synthetic leather substrate, wet and dry rub fastness was discussed. The result indicated that when the dosage of hyperbranched polymer with 5.85% terminal amino groups was 0.8%, the dye uptake rate was 92.92% and surface chroma was the best, the wet and dry rub fastness of microfiber synthetic leather substrate were almost unchanged.

Abstract: Phragmites australis are the typical vegetation in Zha Long National Natural Reserve. From August 10th to August 21st in 2006, we chose 60 quadrats in 15 sample sites, investigated the reed biomass, height, diameter, water nitrogen and phosphorus concentration. The results are as follow: 1) the average biomass of Phragmites australis models is 2858g•m-2 and the biomass between 15 sample sites is from 2029.0 to 4067.4 g•m-2; 2) the moisture content of Phragmites australis is from 42.95% to 64.95%. The average height of Phragmites australis is 272.47cm, and the average diameter of Phragmites australis is 0.51cm; 3) the NP weight ratio in each sample site concentrate from 9.18 to 15.79. Nitrogen is the most important limiting factor in Phragmites australis vegetation growing while phosphorus is not the limiting factor; 4) the Phragmites australis biomass is restricted by many factors especially water depth and water nitrogen concentration. But the phosphorus concentration in water has irrelativeness with Phragmites australis biomass.

Abstract: This experiment extracted a halophilic bacteria from the deep sea-bed mud to carry out bioremediation of PCB-contaminated soil under different nitrogen source, permeability, humidity, temperature and salinity. The experimental results showed that during the 20-day soil natural bioremediation, there were little change in the concentration of PCB1260. The PCBs degradation rate was 26.03% in 20d when the soil water content was 60% of field capacity, room temperature, beef extract 0.5g•kg-1, standing, soil salinity 0.2g•kg-1. When the soil temperature increased to 30°C, the PCBs degradation rate was up to 89.21%. After submerging treatment, the degradation rate was 19.45% in 20d. Adding nitrogen-contained nutrition and proper soil stirring aided the growth of B2.6, enhanced the metabolic activities of indigenous microorganisms, and accelerated the natural degradation of soil PCBs. The PCBs degradation rate was up to 38.97% when the soil salinity was 1g•kg-1.

Abstract: Time courses of biomass, glucose and xanthan during solid state fermentation with various initial glucose concentrations were determined and analysed with a metabolic flux method. The use of 80 g L-1 instead of 40 and 20 g L-1 glucose led to higher xanthan production. In the stationary phase of cells, the velocities (ν) of all metabolic pathways are increased with increasing glucose concentration, while the highest specific rates (γ) of glucose consumption and xanthan generation was obtained when the initial glucose concentration was 40 g L-1. Hence, under solid-state fermentation, an abundant initial carbon source is advantageous in improving the velocity of xanthan production, while moderately abundant carbon sources promote the conversion of carbon to xanthan.

Abstract: According to the color development reaction between starch/iodine reagent and products which obtained by fumigating melamine with chlorine, a method for determination of melamine in milk was put forward. The conditions of method were researched. The best conditions are as follows. Volume ratio of milk and extraction agent is 1:1. 5, dissolved with ultrasonic washer for 5 minutes, centrifugal separation 4000r/min for 5 minutes, extracted by C008 cation exchange resin column. The results are as follows: detection limit is 10mg/L, the linear range is 25-250 mg/L, related coefficient r is 0.994, coefficient of recovery is 94%-110%, and relatively standard deviation is 0.9%. This method is easy handling, cheap equipment, good practicability and recovery, can be used as low cost detection method.

Abstract: Bupleurum scorzoneri folium Willd.(BSFW) is a traditional Chinese medicine which is widely distributed in China. To evaluate the quality of BSFW from different habitats, samples from 5 different areas in China were determined by UPLC/MS. The chemical data were dealed with hierarchical clustering, PCA, SPCA, PLSDA and SPLSDA using R software. The results show that these pattern recognition methods can fully reflect the chemical composition of different areas of BSFW, which make it possible to control the quality.

Abstract: This paper was reported a polymeric support metal catalyst and its application in oxidation of ethylbenzene with molecular oxygen. The Poly(1-vinylimidazole-co-methyl methacrylate) copolymer (PVM) was directly mixed with copper sulfate solution to prepare the catalyst of Cu(II)-PVM. The appropriate reaction temperature and amount of catalyst were 130°C and 0.2g. Recycling studies indicated that the catalyst could be recycled at least four times without significant decrease of catalytic activity.

Abstract: In this work, the color removal of Acid Deep Blue P-2RB (ADBP-2RB) was experimentally investigated using boron-doped diamond (BDD) micro-array disc electrode. The results show that the BDD micro-array electrode rotating electrochemical disc process could efficiently remove the color by 95% after 60-min electrolysis. The influence of factors such as the voltage, disc rotating speed, pH, and treating time was explored. The de-colorization mechanism was studied with UV-vis spectra.

Abstract: The effects on degrading 3-nitrophenol (3-NP) with sodium acetate as co-substrate under the conditions of laboratory-scale upflow anaerobic sludge blanket (UASB) reactor was investigated at an operating temperature of 35±1°C in this study. The results showed that the optimum influent 3-NP concentration was 71.6mg/L when keeping influent COD concentration for 2500 mg/L and hydraulic retention time (HRT) for 30 h. At the stage of reducing influent COD concentration, all of the 3-NP removal rates were more than 95%; while the conversion rate of 3-aminophenol (3-AP) decreased from 61.4% to 0.2%. Meanwhile, the reduction of HRT also had significantly effects on the treatment effect of 3-NP. With the decreases of HRT, COD removal dropped to 49.7% from 82.7%.

Abstract: Environmental pollution has become one of the most serious problems with the development of the world. TiO2 has caused great concern due to its excellent effort on the environmental purification and solar energy conversion. N, S-doped titania were prepared by a one-pot hydrothermalmethod using urea and sulfourea as precursor of nitrogen and sulfur. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of them was evaluated for the degradation of methylene blue under xenon lamp which has similar spectra to solar light. The preparation methods and doping mechanism of the nitrogen-doped TiO2 are discussed. Morever, N, S-codoped titania can further enhacnce the photocatalytic activity effectively, This excellent performance could endow the as-prepared P-doped titania potential in purifying wastewater.