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41.
Can China control the side effects of motor vehicle growth? 总被引:2,自引:0,他引:2
Michael P. Walsh 《Natural resources forum》2007,31(1):21-34
Motor vehicle growth in China is the fastest in the world. This is placing great strain on the urban environment and causing a rapid increase in oil imports and motor vehicle carbon dioxide emissions. To deal with the environmental and health effects of air pollution, China has adopted a strong motor vehicle pollution control programme and imposed limits on fuel consumption of new light duty vehicles. The article will review these problems and programmes. Special focus will be given to the need to reduce sulphur levels in both gasoline and diesel fuel. 相似文献
42.
陈金长 《石油化工环境保护》2004,27(1):29-32
介绍了荷兰超级克劳斯—99工艺技术在安庆分公司炼油厂工业应用的设计特点、自动控制系统、装置运行状况和影响平稳生产的主要因素,同时提出改进意见。 相似文献
43.
44.
高效固硫工业型煤及其燃烧特性的研究 总被引:2,自引:1,他引:2
针对贵阳地区高硫、低挥发分难燃煤特点,通过多项燃烧特性指标的改善及固硫催化剂添加研制成具有高固硫率并能高效燃烧的固硫工业型煤 相似文献
45.
We demonstrate that carbon, hydrogen and sulphur isotope ratios both, in the total peat (13Ctp=–25.52 to –28.27, Dtp=–78.67 and –109.24, 34S=4.35 to 19.87), and in cellulose from the peat (13Cnc=–25.06 to –27.33 and Dnc=–92.43 to –118.02) are not affected by postdepositional changes. Therefore, the original isotope composition of plants are in general preserved in the peat and represent an archive of the past environmental variations. These can be supported by (i) good correlations between 13Ctp and 13Cnc, and between Dtp and Dnc, (ii) high horizontal homogeneity of 13Ctp and 13Cnc in the scale of one peat-bog – the same major factor(s) control(s) C isotopic ratios, (iii) no correlation between organic sulphur concentrations and 34S value –34S results from variations in the water level.This revised version was published online January 2005 with corrections to the title. 相似文献
46.
Inhibition of PCDD/F by adding sulphur compounds to the feed of a hazardous waste incinerator 总被引:1,自引:0,他引:1
Sulphur compounds, including (NH4)2SO4 and pyrite, were tested as suppressants in a hazardous waste incineration facility. The test results suggested that adding sulphur compounds only slightly reduced PCDD/F stack emissions; this restricted effect was attributed to the release of fly ash in large amounts during the sulphur adding experiments, i.e., it was due to a malfunctioning of the baghouse filter. Nevertheless, for the combined flow of flue gas + fly ash a reduction of more than 50% was achieved for the total PCDD/F concentrations and the total toxic concentrations, and an even higher inhibition capability was observed for PCDD. Also, a simulation of the thermodynamic equilibrium conditions by sulphur dioxide was conducted in the domain of experimental interest. Deactivation of catalysts, which promote PCDD/F formation, was found to be the dominant inhibition mechanism in low temperature PCDD/F formation. SO2 could also inhibit the formation of molecular Cl2 via the Deacon reaction, but that was not the main reason for inhibition. 相似文献
47.
Investigating the impacts of some meteorological parameters on air pollution in Balikesir, Turkey 总被引:1,自引:0,他引:1
Air pollution is one of the most important environmental problems in Balikesir, situated in the western part of Turkey, during
the winter periods. The unfavorable climate as well as the city’s topography, and inappropriate fuel usage cause serious air
pollution problems. The air pollutant concentrations in the city have a close relationship with meteorological parameters.
In the present study, the relationship between daily average total suspended particulate (TSP) and sulphur dioxide (SO2) concentrations measured between 1999–2005 winter seasons were correlated with meteorological factors, such as wind speed,
temperature, relative humidity and pressure. This statistical analysis was achieved using the stepwise multiple linear regression
method. According to the results obtained through the analysis, higher TSP and SO2 concentrations are strongly related to colder temperatures, lower wind speed, higher atmospheric pressure and higher relative
humidity. The statistical models of SO2 and TSP gave correlation coefficient values (R
2) of 0.735 and 0.656, respectively. 相似文献
48.
Kupcinskiene E Stikliene A Judzentiene A 《Environmental pollution (Barking, Essex : 1987)》2008,155(3):481-491
The aim of this study was to evaluate composition of the essential oils in the needles of Pinus sylvestris growing in the areas affected by a cement factory (CF), and an oil refinery (OR). Volatile components of the needles were analyzed by GC and GC/MS. The most heavily polluted CF stand had significantly higher concentration of gamma-Terpinene, Caryophyllene oxide in the current-year needles, while higher concentration of delta-3-Carene, alpha-Terpinene, gamma-Terpinene and Terpinolene was documented for 1-year-old needles. The most heavily polluted OR stand had a significantly higher concentration of Sabinene+beta-Pinene, 1-epi-Cubenol in the current-year needles and a significantly higher concentration of Camphene, Sabinene+beta-Pinene, Myrcene, alpha-Cadinene, 1-epi-Cubenol in the 1-year-old needles than the least polluted site. Along transects an increase in the amount of some diterpenes and a decrease in the components of the shorter chain essential oils was observed. These effects could be at least partially attributed to SO(2). 相似文献
49.
Regional trends in soil acidification and exchangeable metal concentrations in relation to acid deposition rates 总被引:3,自引:0,他引:3
The deposition of high levels of reactive nitrogen (N) and sulphur (S), or the legacy of that deposition, remain among the world's most important environmental problems. Although regional impacts of acid deposition in aquatic ecosystems have been well documented, quantitative evidence of wide-scale impacts on terrestrial ecosystems is not common. In this study we analysed surface and subsoil chemistry of 68 acid grassland sites across the UK along a gradient of acid deposition, and statistically related the concentrations of exchangeable soil metals (1 M KCl extraction) to a range of potential drivers. The deposition of N, S or acid deposition was the primary correlate for 8 of 13 exchangeable metals measured in the topsoil and 5 of 14 exchangeable metals in the subsoil. In particular, exchangeable aluminium and lead both show increased levels above a soil pH threshold of about 4.5, strongly related to the deposition flux of acid compounds. 相似文献
50.
To assess the impacts of the decline in sulphur (S) deposition over the past 20 years in Ontario, soil chemistry and sugar maple (Acer saccharum Marsh) foliar chemistry were measured at 17 sites in south and central Ontario in 2005 and compared with archived samples collected in 1986. Foliar S concentrations were lower in 2005, reflecting the decline in S deposition whereas foliar N remained unchanged, reflecting the lack of change in N deposition in Ontario. Mineral soil pH, exchangeable base cations were lower in 2005 whereas total S, N and cation exchange capacity (CEC) were unchanged. Foliar concentrations of Ca were positively related to soil Ca levels in the A-horizon and were lower in 2005. Despite evidence of increasing soil acidity and losses of calcium, foliar base cation concentrations at most sites were adequate for sugar maple and forest health in terms of canopy appearance (Decline Index) improved. 相似文献