Advanced Materials Research Vols. 518-523

Abstract: Aurous-cysteine complex was reported in this paper ,and its property including characterization and plating was studied . IR spectra reveals a strong coordinating bond formed between Au(I) and the mercapta group of the cysteine with the target complex .By using single factor’s experiments the optimal plating index has been gotten and they are: pH=5.5~8.5,[Au]=2~3 g/L , temperature 50~70 °C respectively.

Abstract: Coal fly ash contains large amounts of aluminum, iron, silicon and other useful elements. Its utilization effectively is of significance to harmonious development of economy, society and environment. However, coal fly ash is mainly composed of mullite and other inert glassy matters with high degree of polymerization and its reactivity is poor. So the fly ash needs to be activated before utilization. This article studied the effect of activation by calcination added with NaOH additives on aluminium extraction. The results showed that the addition of NaOH could improve the aluminium extraction rate evidently. Detailed analysis and characterization was carried out by using X-ray diffraction (XRD). The results indicated that NaOH could improve the depolymerization of vitreous.

Abstract: The effect of bed depth on adsorption ability of natural zeolite to removal methylene blue (MB) from aqueous solution in the fixed-bed column was studied. The results showed that the increase in column height favored the MB removal form solution. The equilibrium uptake of MB onto unit mass zeolite increased with the bed depth growth. The experimental data were fitted to Yan model using linear and nonlinear regression analysis, respectively. The experimental points and the predicted curves using the Yan model were compared and the error analysis was performed. The results indicated that Yan model were good to predict the breakthrough curves and both two methods can be used to obtain the parameters of Yan model and to predict the breakthrough curves.

Abstract: Conventional treatment of coke plant wastewater includes pre-treatment, biological treatment and coagulation sedimentation. Due to the presence of refractory and inhibitory compounds, the conventional biological treatment is not efficient in removing COD to meet the effluent standard. The improving methods of the removal efficiencies were discussed.

Abstract: This paper analyses the characteristics of information flow in waste military air materials reverse logistics, the influencing factors and the structure of waste military air materials reverse logistics management. Then, the method of information flow management and control in waste military air materials reverse logistics is designed, and the architecture of information flow control in waste military air materials reverse logistics management information system is proposed.

Abstract: The degradation of Benzyl butyl phthalate (BBP) at low concentration (μg•L^-1 range) by the direct UV irradiation, H₂O₂ oxidation and UV/H₂O₂ advance oxidation process was investigated in this study. The experiment results showed that the decomposition efficiency of UV or H₂O₂ was worse than that of UV/H₂O₂. Under the condition of 24.26μw•cm^-2 UV irradiation and 2.49 mM H₂O₂, the degradation efficiency of BBP at low concentration was over 90% after 30 min. In addition, the solution pH was found to have no significant effect on the photo-degradation of BBP. The degradation of low concentration BBP in the tail water of municipal sewage plant was 84.23% with UV/H₂O₂ at the UV irradiation (24.26μw•cm^-2) and H₂O₂ (2.49 mM) without adjusting pH.

Abstract: Abstract. The research objects were the soils along the river and river sediment of the fourth Liuhe river in Nanjing chemical industrial park. Degrading dynamics of brilliant blue in soils and river sediment and its affecting factors were studied through soil sterilization, the control of temperature and initial concentration of brilliant blue. The degradation rate of brilliant blue in non-sterilized soils and river sediment was respectively 1.010-1.023 times and 1.019-1.051 times of that in sterilized soils and river sediment in 45 d. The degradation quality of brilliant blue in soils and river sediment by microorganism was 0.010-0.029 and 0.021-0.057 mg•kg-1. The half-live in non-sterilized treatment was shorter than that in sterilized treatment. In the range of (10±1)°C-(30±1) °C, the degradation of brilliant blue was accelerated with temperature enhancing. At (30±1)°C, the residual quantity of brilliant blue in soils and river sediment was 0.612 and 0.601 mg•kg-1, the residual quantity and the half-live were both smallest.

Abstract: The membrane-aerated biofilm reactor(MABR) was specially designed to evaluate its suitability for the treatment of an artificial sewage in laboratory. The paper presented the configuration of the MABR, the performance of MABR on treatment efficiencies(COD, NH4+-N, NO3--N), and the theoretical analysis on treatment efficiencies. After 60 days of operation, the effluent concentration of COD was below 50 mg/L, and the removal efficiency was above 85%; the effluent concentration of NH4+-N was below 20 mg/L, and the removal efficiency fluctuated at the range of 90%; what’s more, the MABR reach the goal of simultaneous nitrification and denitrification(SND). Based on these experiments, the MABR was shown to be a very suitable experimental set-up for wastewater on a single-stage type.

Abstract: Abstract. In this paper we have presented the degradation of Phenol in aqueous solution which is caused by pulse discharge. The reaction products in the wastewater dissolved phenol under pulsed discharge were tested using GC-MS. Based on the experimental results intermediate products include 2,4hydroxyphnel, polyhydroxy phenethyl alcohol and so on. The final products are carbon dioxide and water. In addition, the theoretical analysis has been conducted These results will be helpful for further studying degradation mechanism of wastewater dissolved phenol under pulsed discharge, using either AC or DC voltage.

Abstract: Abstract: Calcium and magnesium contents of sludge composting are measured by using the method of ammonium acetate-EDTA complex metric titration here, through Fermentation accelerant and increased nutrient agent treatments. The results showed as following: 1, exchangeable Ca and Mg contents of sludge single treatment increased more 6.83% and5.12% at the end of composting, than at the beginning of composting. 2, Fermentation accelerant added in sludge from 8% to 40%,，the exchangeable calcium and magnesium are more 4.38% ~ 10.58% and 6.77% ~ 13.78% at the end of composting than at the beginning of composting. The exchangeable Ca increased 19.51% ~ 104.83%, but 6.05% of a decreased trend for exchangeable magnesium, Compared with the sludge single compost. 3, as increasing the amount of nutrient agent from 30% to 50%, the exchangeable calcium and magnesium are more 3.88%~7.75%and 5.24%~9.18% at the end of composting than at the beginning of composting. The exchangeable Ca increased in 11.35%~41.13%,but 49%~-3.96% of a decreased trend for exchangeable magnesium, Compared with the sludge single compost. 4, under the condition added 24% of the Fermentation accelerant agent to the sludge, as the Increased nutrient agents from 8% to 32%, the exchangeable calcium and magnesium measured are increased 2.63%~5.54%and3.6%~4.19% at the end of composting , compared with The beginning of composting. The exchangeable Ca increased in 52.34%~112.04%,but -10.15%~-15.59% for exchangeable magnesium, Compared with the sludge single compost.