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Wheat straw is a largely available and cheap agricultural residue. Field burning is the major conventional practice for removing wheat straw, but it increases the air pollution and consequently affects the public health. China has already banned open field burning. The aim of the present work was to investigate the suitability of wheat straw as a raw material for particleboard. Polyisocyanate resin...
Mangliaia aromatica has been planted in garth. However Mangliaia aromatica are still underutilized and hence wasted. In order to better know Mangliaia aromatica, the biomedicine resource of benzene/alcohol extractives from Mangliaia aromatica were analyzed by GC/MS. Relative content of each component was determined by area normalization. The main ingredients of benzene/alcohol extractives of Mangliaia...
Large amount acid mists will be produced by the technology of Wet flue gas desulphurization (WFGD) and selective catalytic reduction (SCR) produce in the coal-fired power plant, which will cause serious corrosion of pipeline and air pollution. Experiment and pilot test efficiencies of removing acid mist from WFGD were conducted using wet electrostatic precipitators (WESP) in this work. The effect...
In this paper, monthly averaged API index data from August 2006 to September 2009 of the 86 key environmental protection cities in China were broken down into several fields and their time functions by the Empirical Orthogonal Function (EOF) method, and the temporal and spatial distribution characteristics of API were analyzed. It was shown that the regional differences of API were significant among...
Based on the acid rain data measured at Shapingba weather station in Chongqing from 1993 to 2007 and the emission data of SO2 in Chongqing, Guizhou and Sichuan, the acid rain change trend and its relationship with SO2 emission were analyzed. The results indicated that in the past 15 years, the change trend of the pH value of the precipitation in Chongqing changed between 3.8 and 4.5. The annual variation...
A magnetically separated fly ash micro-sphere (MSFM) were prepared by citrate sol-gel process.The microstructure of the products were tested by SEM and EDS. It was found that the MSFM was coated with network of barium ferrite, which exhibited the magnetic absorption property. Then the TiO2 film photocatalysts immobilized on MSFM were prepared by sol-gel method, methods. The crystal phase and morphology...
Volatile organic compounds (VOCs) emitted from larch particleboard at different temperatures were studied in this paper. The small climate chamber and portable VOC gas monitor were used to measure VOCs quantities. Particleboard 1 (with hot-pressing time 3.5 min and hot-pressing pressure 35 MPa) and particleboard 2 (with hot-pressing time 2.7 min and hot-pressing pressure 30 MPa) were respectively...
NOx is one of pollutants produced from fuel burning, especially coal burning, which affects on the environmental quality of air. Utility industry is central user of energy consumption. During the process of electrical production, large numbers of pollutants are produced. In this paper, Shanghai as a case, through studying the NOx formation during coal burning, the relationship between NOx emission...
In this paper, FLUENT software was used to simulate the burning process in a utility boiler. Chose the kinetics/diffusion-limited as combustion model, discrete ordinates as radiation model, realizable model as viscous model, PDF model as combustion turbulent flow model, and two step mode as soot mode. Numerical calculation of soot was done. The soot distribution along with furnace height and in the...
A new test rig is introduced to determine the cleaning efficiency of air disinfecting devices. The experimental setup includes three main parts which are the test chamber, the aerosol generation unit and the actual measuring unit. The performance evaluation methodology places the air disinfection device to be tested in the test chamber, a microbial aerosol is generated and injected into the test chamber,...
Considering the characteristics of the domestic sewage at the small stations in the Qinghai-Tibet railway and using the abundant solar radiant heat on the Qinghai-Tibet plateau, the ecological greenhouse is established, which could constitute a small semi-closed artificial environment suited normal sewage biological treatment under the atrocious natural condition of the Qinghai-Tibet plateau. It could...
With the national economic development and continuous improvement of people's living standards, people pay more attention to improving the quality of life; this has highlighted the performance in the aspect of the decoration in the home. However indoor air pollution caused by bedroom luxury decoration is becoming a hidden killer and a serious threat to the health of the people. Relevant data indicate...
An investigation was conducted on the characteristics and leaching behavior of heavy metals from municipal solid wastes incineration (MSWI) fly ash in Chongqing, China. Results indicated that the average particle size of the fly ash was 36.4 μm, the large particles were formed mainly by small particles' adsorption or aggregation. The total content of the main heavy metals was about 1.04% of the fly...
Based on the quality data from 2001 to 2008 of the atmospheric environment, status of atmospheric pollution of Jinan City were analyzed, the key factors were discussed, and suggestions were offered. The conclusion showed obvious seasonal characteristics with the most serious pollution in winter, spring, and summer next. In recent years, the atmospheric environmental quality has been improving on the...
Xinjiang is the emission region of sand-dust aerosol as well as the region suffering the severest damage from sand-dust aerosol, whose urban environment especially suffers greater impact from the particles of sand-dust aerosol. The impact on urban environment in Xinjiang is mainly attributed to the sand-dust weather in the multiple sand-dust seasons. The variation trend is in conformity with that...
Formaldehyde, total volatile organic compounds and sulfur dioxide were selected as the evaluating indicator to assess the indoor air pollution status of dwellings in Nanjing City. And twenty randomly drawing households in the urban and suburb of Nanjing City were selected as specimen. The results showed that the concentrations of formaldehyde, total volatile organic compounds and sulfur dioxide were...
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,...
Fly ash is waste which severely affected the healthy of people. To utilize it, the mineralogy properties must be studied. By using multielement chemical analysis, the principle chemical composition was analyzed. By using X-ray, electron probe, spectrum analysis testing methods, the cenospheres which are the main component of fly ash surface morphology and the differences of the components were mainly...
This paper gives an overview of the sensitivity of AERMOD by comparing the simulated concentrations of SO2 under different model options with the corresponding observed concentrations. While the influence of meteorological conditions on the performance of AERMOD is noticeable, the urban/rural dispersion coefficients and the terrain conditions have only a limited influence on the results from AERMOD...
As one of the typical indoor pollutants, formaldehyde has attracted more and more attention. It is well known that long-term exposure to even fairly low levels of formaldehyde will bring the risk of asthma, eczema and other diseases. In this study, the nano-TiO2/β-cyclodextrin (β-CD) coated paper was applied to remove formaldehyde under UV irradiation. The optimum composition of the nano-TiO2/ β-CD...
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