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The decomposition of diethyl phthalate (DEP) has been carried out in UV/H2O2 and UV/TiO2/glass films process separately. The effects of reaction pH, applied H2O2 dose and initial concentration of DEP have been studied. The optimal conditions at an initial DEP concentration of 20 mg.L-1 were acidic and 15mmol.L-1 H2O2 in UV/H2O2 system, and pH3.0 in UV/TiO2/glass films system under 254nm UV irradiation...
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SBR process of A/O/A/O many-point-water-inflow mode was investigated to treat landfill leachate. When the HRT of four stages were respectively A(2.0h)/O(10.0h)/A(2.0h)/O(6.0h), the influent of two anoxic stages were added in the proportion of 2:1, excretion ratio was 1/3, pH of influent was 7.5~8.0, the results showed that the removal rate of CODCr, NH3-N and TN were 71.7%, 92.4% and 69.8% respectively...
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The present paper proposes the application of sodium trititanate whisker as solid sorbent for trace cadmium pre-concentration/separation using a static system coupled with flame atomic adsorption spectrometry (FAAS). The method comprised the pre-concentration of Cd(II) ions at a buffered solution (pH 5.0) onto 0.25 g of sorbent previously activated by 3.0 mol/L of HNO3. The elution step was carried...
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An anaerobic membrane bioreactor (AnMBR) was employed for the treatment of low-strength municipal wastewater in this study. The membrane filtration performance and pollutant removal efficiency were investigated. A series of measurements, i.e., three dimensional excitation-emission matrix (EEM) analysis, gel filtration chromatography (GFC), Fourier transform infrared (FTIR) analysis, characterization...
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In order to investigate the feasibility of treatment of dairy farm wastewater by constructed wetland and to provide the operation parameters for a full scale constructed wetlands to improve the quality of effluent water, A pilot test was conducted with a plug flow constructed wetland to treat dairy farm wastewater in Ji'nan city. The results show that, under influent loading rate 3m3·d-1, the average...
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The spatial and temporal distribution of landslide in Zhejiang, Fujian and Guangdong Provence is analyzed based on statistic data of landslide hazards and precipitation, and the relationship between landslide hazards and typhoon rainfall is considered. The spatial distribution of landslide hazards is uneven. Landslide in Guangdong Provence concentrates in the north-west and north of the mountain areas,...
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The explants (root tip, shoot tip, stem segments and leaf segments) from Phalaenopsis hybrid were used in this experiment. The effects of NAA, 6-BA, AC, CM and above explants on callus induction on KC medium were investigated by using orthogonal design (L16(54)). The results indicated that the optimum medium for callus induction is 6-BA 4.0 mg/L+ NAA 0.4 mg/+CM 100 ml/L+AC 0.4 mg/L, and stem segment...
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Environmental risk is ascribed to contamination level as well as the potential decontamination capability of the contaminated sites. In some cases, natural attenuation by biodegradation may dominate self cleanup as microorganisms always try to survive, which reduces risk to human health. Conventional assessment is based on sequential monitoring of concentrations, which requires a large number of samples...
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For exploring the recognition performance of MUAPs, using the synthesized signal, the candidate MUAPs were detected by the combined method of continuous wavelet transform and hypothesis testing, the primary clustering of MUAPs was done by the fuzzy k-means algorithm, and the superimposed waveforms were decomposed by the modeling approach. The experimental results showed that the simulated MUAPs could...
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Derived from the individual surface coil images, a new method based on anisotropic diffusion for estimating the coil sensitivity is proposed in this paper. When the coil sensitivity maps estimated by this method are applied to reconstruct the magnetic resonance image from the under-sampled images by parallel imaging reconstruction Sensitivity Encoding method, the quality of the reconstructed image...
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The impacts on environment of coal-fired thermal power plants are associated with combustion products discharged into their surrounding. To summarize the mobility rule of trace elements during the combustion process of coal and make clear the migration mechanism in Huainan thermal power plants, the content of elements was determined by ICP-AES and HG-AFS. In the case of Huainan thermal power plants,...
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Three inorganic compounds, K2CO3, K2SO4, KCl have been investigated with regard to their catalytic effects on pyrolysis of tannery sludge by thermal analysis experiments. The influence of catalyst categories and dosage on sludge pyrolysis were studied by the comparison and analysis of the TG ( thermogravimetry ) and DTG(derivative thermogravimetry) curves derived from tests of differential thermal...
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The analytical protocols were developed and tested for simultaneous determining three groups of antibiotics including four fluoroquinolones (FQs), three tetracyclines (TCs) and eleven sulfonamides (SAs), in water and soil samples. Solid phase extraction (SPE) was used to enrich and to clean up the aqueous samples. The potassium phosphate buffer and acetonitrile mixture solutions were used to extract...
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We compared the distribution of methylation of histone H3 lysine 4 on genes of different lengths. The result shows that the mono- and di-methylation present different distribution patterns on genes with different lengths. Furthermore, these two methylations exhibit distinct correlations with expression when gene length is different. Our results suggest that the gene length might play a role in the...
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A huge quantity of solid wastes produced by Wenchuan earthquake has brought us a great challenge to dispose and also aroused people's great attentions to search for a rational and effective method to deal with such mass wastes, as well as the recycled aggregate concrete used in construction has been heated discussed worldwide. In this paper, the essentiality and feasibility of using recycled aggregate...
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Simulation and experimental study the IAQ (indoor air quality) of air-conditioning classroom in summer condition were carried out. With professional software FLUENT, research model of complicated three-dimensional turbulent flow-field that contained many kinds of ventilation equipments was established. The model visually simulated the changes of distributions of indoor air velocity and air age. The...
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White noise makes peroxidative damage of the brain, dose it have effect on the phosphorylation of tau in hippocampus? We used 66 mice exposed to 80 dB SPL white noise for 3 days, 1 week, and 3 weeks respectively, then detected the changes of Superoxide dismulase (SOD) activity and malondialdehyde (MDA) content in inferior colliculus (IC), auditory cortex (AC), and hippocampus. Meanwhile we detected...
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China is a great agricultural country. Reasonable development and utilization of rural energy is related to Peasant's human production and life and improvement of rural eco-environment. Because lack of energy is serious in recent years. China strengthened study on biogas technology and got rich findings. But there is relatively backward in extended application of biogas technology. Therefore,this...
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The pellet of Aspergillus oryzae CICC 2026 was found to exhibit glutamate decarboxylase activity, and γ-aminobutyric acid was testified by paper chromatography. Its biochemical and kinetic properties were characterized. The results showed the pellet did not accumulate γ-aminobutyric acid (GABA) in the fermentation broth, but catalyzed the α-decarboxylation of MSG to GABA in the acetate buffer. The...
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