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1.
近年来,苏州市区酸雨出现频率增加,降水pH值下降,威胁着众多的文物古建筑。因此从苏州现存文物古建筑的五种材质入手,剖析酸雨对文物古建筑的影响,并对国家重点保护文物罗汉院双塔及正殿遗址典型的案例进行了剖析。  相似文献   

2.
Environmental Science and Pollution Research - For an economy to excel in growth, there is usually a trade-off between financial development and environment deterioration. For a country like...  相似文献   

3.
Environmental Science and Pollution Research - Energy is the source of economic growth, and energy consumption indicates the country’s state of development. Energy engineering is a relatively...  相似文献   

4.
污染物总量控制是目前我国广泛应用的一种控制区域环境质量达标的方法 ,在总量控制中 ,环境容量分配的科学化、合理化和各点浓度的合理值计算是至关重要的。本文就此做些研究 ,以确保实现从局部到区域的环境质量达标。  相似文献   

5.
Land-use regression models have increasingly been applied for air pollution mapping at typically the city level. Though models generally predict spatial variability well, the structure of models differs widely between studies. The observed differences in the models may be due to artefacts of data and methodology or underlying differences in source or dispersion characteristics. If the former, more standardised methods using common data sets could be beneficial. We compared land-use regression models for NO2 and PM10, developed with a consistent protocol in Great Britain (GB) and the Netherlands (NL).Models were constructed on the basis of 2001 annual mean concentrations from the national air quality networks. Predictor variables used for modelling related to traffic, population, land use and topography. Four sets of models were developed for each country. First, predictor variables derived from data sets common to both countries were used in a pooled analysis, including an indicator for country and interaction terms between country and the identified predictor variables. Second, the common data sets were used to develop individual baseline models for each country. Third, the country-specific baseline models were applied after calibration in the other country to explore transferability. The fourth model was developed using the best possible predictor variables for each country.A common model for GB and NL explained NO2 concentrations well (adjusted R2 0.64), with no significant differences in intercept and slopes between the two countries. The country-specific model developed on common variables for NL but not GB improved the prediction.The performance of models based upon common data was only slightly worse than models optimised with local data. Models transferred to the other country performed substantially worse than the country-specific models. In conclusion, care is needed both in transferring models across different study areas, and in developing large inter-regional LUR models.  相似文献   

6.
Environmental Science and Pollution Research - With the growing interest among researchers in analyzing the ecological footprint of any country, this study focuses on new dimensions to analyze the...  相似文献   

7.
The planning and conduct of series of tracer experiments carried out in St. Louis in the period between 1963 and 1965 is described. Tentative results indicate that horizontal dispersion over an urban area does not differ greatly from that observed over open country, except for a much greater initial spreading of the tracer plume. Vertical dispersion during the daytime does not appear to differ greatly from that observed over open country, and can be best expressed in terms of travel time rather than travel distance. Vertical dispersion during the evening over an urban area is much greater than that observed over open country; the limited results obtained suggest the formation of a slightly unstable layer as the air flows over the city.  相似文献   

8.
概述了国内外烟气脱硫技术的应用现状、脱硫原理及其特点 ,并提出了我国烟气脱硫技术的研究开发方向  相似文献   

9.
Environmental Science and Pollution Research - Heritage structures are valuable monuments that describe the culture and tradition of the country. In today’s world, natural or artificial...  相似文献   

10.
The representiveness of daily observations at atmospheric smoke and sulphur dioxide concentrations monitored at National Survey country sites is discussed. Long-term mean smoke and sulphur dioxide concentrations for wind octants at 21 country sites in England and Wales are presented and examined in the context of urban and background concentrations. Sources are identified and the effects of wind speed on the long-distance transport of air pollution discussed.Estimates of domestic and industrial smoke emissions, by counties, for England and Wales are given. An expression is developed from which long-term concentrations of smoke or sulphur dioxide at a country site can be calculated.  相似文献   

11.
土壤中四环素类抗生素污染研究进展   总被引:2,自引:0,他引:2  
由抗生素类物质的使用引发的土壤环境污染问题已引起全球的广泛关注.中国是抗生素类物质的消费大国,其抗生素污染问题亟待解决.介绍了世界范围内使用最为广泛的四环紊类抗生索在土壤环境中的污染现状;分析了国内外有关四环素类抗生索的研究状况和进展;揭示了生物有效性研究在评价四环素类抗生索对土壤环境生态风险的重要意义;最后对四环素类...  相似文献   

12.
Environmental Science and Pollution Research - By 2040, India hopes to have completed its energy supply to fulfill the country’s rising energy demands. Renewable and conventional sources must...  相似文献   

13.
本文研究我国目前炭黑工业大气污染控制技术的状况及特点。近十年来,我国炭黑工业大气污染控制技术有了长足的进展,选择合理的工艺过程,采用袋滤器高效净化炭黑烟气,成功地开发了炭黑工业气体余热的回收及利用。为此,我国炭黑工业大气污染控制技术,实现了炭黑微粒和可燃气态污染物的高效净化,炭黑工业气体余热绝大部分得到了回收及利用,余热利用率达60%以上。我国炭黑工业一跃成为低能耗、有效能高效利用,大气污染物高效净化的清洁生产的化工厂,和生产热力及电力的能源部门。  相似文献   

14.
根据目前我国城市生活垃圾热值偏低的实际情况 ,提出以煤为辅助燃料 ,采用循环流化床焚烧技术处理生活垃圾 ,可大幅度降低运行成本 ,符合国情。阐述了循环流化床焚烧技术在降低NOx、SO2 和二噁等方面的优越性。尾气处理建议采用喷活性碳 +布袋除尘组合工艺 ,飞灰处理建议采用高温熔融处理  相似文献   

15.
光化学氧化技术去除水中有机污染物的试验研究   总被引:25,自引:0,他引:25  
以自来水为试验对象,对紫外-臭氧和紫外-二氧化钛两种光化学氧化技术对水中微量有机污染物的去除进行了试验研究,结果表明两种工艺的UVA(紫外吸光度)去除率均达到80%以上,对氯仿的去除也均能达到国家饮用水标准。在此基础上,自制了一种催化剂膜,并取得了预期的处理效果,有望在新型净水技术及设备的研制和开发上得到应用。  相似文献   

16.
Despite this country’s scientific advances, most communities in the United States are still disposing of solid wastes the way they did 50 years ago. The problem is advancing faster than the solution. Less than half the cities in this country with populations over 2500 dispose of their wastes by an approved sanitary and nuisance-free method. Do you realize that every 60 seconds people in the United States drop 251 tons of trash into their garbage cans. At the end of the day, 362,000 tons have accumulated. This means each of the 190 million people in the US disposes of 43½ lb of rubbish daily. By the year 2000 population is expected to double, while the per capita rate of increase in refuse production rises about 2% annually.

As the population booms and spreads to the suburbs, and suburbs expand into further suburbs, we will rapidly use up the land once used for waste disposal. Thus, sanitary landfill sites will disappear because by the year 2000 three-fourths of our population will live in urban areas.

The answer to this enormous problem faced by large and small communities is central incineration. Only this system can provide a maximum reduction in the volume of refuse. It is for this reason that communities are turning to incineration as the best solution. However, a growing public awareness plus changing municipal, state, and federal laws necessitate the need for a modern incineration plant that incorporates the most advanced and proved method of air pollution control. Where efficiencies of 60 to 80% were acceptable in the past, 90 to 95% are sought at present, and soon 96 to 99% will be required.

This paper deals with the effective control of particulate emissions from municipal incinerator exhaust gases.  相似文献   

17.
分析了废电子电器回收处理体系的问题,提出了一种适合我国国情的废电子电器回收处理体系模式,并对国家对废电子电器回收处理体系的支持问题进行了讨论。  相似文献   

18.
我国对于大气污染物的排放给予了高度的重视,规定生产中的污染物必须达标排放。对某厂酸洗车间产生的以酸雾和氮氧化物为主的废气采用高效局部排气罩加以集中收集,设计了净化吸收系统,使经过处理的废气达到“大气污染物综合排放标准”中的二级排放要求,并在设计中充分考虑了系统的节能,收到了良好的环保效果。  相似文献   

19.
我国对于大气污染物的排放给予了高度的重视,规定生产中的污染物必须达标排放。对某厂酸洗车间产生的以酸雾和氮氧化物为主的废气采用高效局部排气罩加以集中收集,设计了净化吸收系统,使经过处理的废气达到“大气污染物综合排放标准”中的二级排放要求,并在设计中充分考虑了系统的节能,收到了良好的环保效果。  相似文献   

20.
城市生活垃圾复混肥示范工程工艺设计   总被引:3,自引:0,他引:3  
提出了适合我国中小城市生活垃圾的处理办法,即利用城市生活垃圾生产有机复混肥。对有机复混肥的效益分析表明,利用城市生活垃圾生产复混具有明显的环境效益,社会效益和的经济效益,是一条利国利民,造福子孙后代的城市生活垃圾处理的好办法。  相似文献   

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