共查询到20条相似文献,搜索用时 375 毫秒
1.
2.
对工业有机废气污染治理技术进行总结和分析,探讨了有机废气污染的成因,论述工业有机废气污染治理技术的应用现状,介绍了催化燃烧、吸附法、微生物处理等邮寄废气治理方法。提出了相应的建议,希望为工业有机废气污染治理提供一定的借鉴。 相似文献
3.
4.
5.
6.
7.
以南风集团沉淀硫酸钡生产中废气治理为主,主要介绍了国内硫酸钡生产过程中废气治理现状,总结了废气污染物治理的措施,并针对废气产污环节若干问题进行进一步的分析探讨,提出相应的治理措施. 相似文献
8.
随着中国式现代化战略改革转型时期的到来,我国工业企业增强了生态化与产业化的关联,持续提升工业废气治理效率,推进生态产业化和产业生态化发展。文章以此为出发点,分析了工业废气治理方法,并在剖析影响其治理有效性因素的基础上,分别从治理理念、治理技术、治理人才、环境管理4个层面,提出了有利于提高工业废气治理效果的建议。 相似文献
9.
11.
Florencia Fernández Campón 《Die Naturwissenschaften》2010,97(3):279-289
In species with widespread distribution, populations found in markedly different environments can show differences in developmental
traits. This, in time, can have an effect on reproductive success. Sources of variation in developmental traits can be genetic
or environmentally induced. I examined the relationship between environmental and genetic influences on juvenile development
in populations of the colonial spider, Parawixia bistriata, located at sites with different moisture regimes and associated environmental variables (e.g., prey availability). It was
expected that individuals from different populations would show differences in developmental traits and that those differences
will be associated with lower reproductive success at dry sites. I recorded the phenology and developmental traits of native
and transplanted individuals in the field and estimated reproductive success based on clutch size. Colonies from wet versus
dry sites showed different phenologies, with individuals at dry sites maturing later. Transplant results suggest plasticity
in instar duration caused by environmental effects. Despite differences in resources and spider phenology, clutch sizes of
native dry and wet populations were similar. Transplanted individuals, however, were differentially affected. Transplants
from wet to dry sites (WD) showed lower growth rates and smaller clutches, whereas transplants from dry to wet sites had larger
clutch sizes than in native habitat. Delayed maturation and failure to reproduce in WD individuals is associated with a lower
tendency to capture prey in groups and less aggressive interactions during prey capture. Thus, despite negative environmental
effects on development, dry native individuals have evolved non-developmental traits that allow successful reproduction. 相似文献
12.
13.
Gregory A. Keoleian Catherine E. Blackler Richard Denbow Ruth Polk 《Journal of Cleaner Production》1997,5(4):279-289
Water-based cleaning of specialty garments is emerging as a potential alternative to dry cleaning. Perchloroethylene, the solvent used in dry cleaning, poses significant human and ecosystem health concerns. This paper is part 1 of a two part series that analyzes the key environmental, human health, performance, economic, and regulatory factors which influence the future of the garment cleaning industry. This paper inventories the environmental releases and wastes associated with the consumption of perchloroethylene in modern dry cleaning machines which ranges from 2.0 to 5.2 kg per 100 kg of clothing cleaned. In addition, water, electricity, and other inputs for both perchloroethylene-based and water-based garment cleaning are compared using data from previous demonstration projects. Toxicological and epidemiological studies provide evidence for the carcinogenicity of perchloroethylene although this classification is controversial. Cancer risks at low levels of exposure associated with modern dry cleaning equipment and good housekeeping practices are unknown and require further investigation. Regardless of these uncertainties, water-based cleaning is preferable to dry cleaning from a human and environmental health perspective. 相似文献
14.
黑龙江省江川农场实施旱田改水田后,粮食产量持续上升,同时也暴露了以总氮和总磷为主的非点源污染问题。农田氮磷流失主要包括以下几个方面:降雨径流(排水)过程、土壤侵蚀和泥沙输移过程、污染物迁移转化过程。文章基于美国通用土壤流失方程(USLE)和降雨径流模型(SCS),结合调查资料,分别估算2013年江川农场水田和旱田的总氮和总磷的年输出负荷,从而得出旱改水对水环境的影响结论。 相似文献
15.
《Atmospheric Environment. Part B. Urban Atmosphere》1992,26(1):73-78
Wet and dry depositions were collected in Pune city using 24-h and weekly sampling periods, respectively, from January 1984 to December 1988. All the wet and dry deposition samples were analysed for major cations and anions along with pH. Dry depositions were minimum in the monsoon season and maximum in the winter season though there was no significant difference in pH values. The wet deposition of all ionic components was found to be higher than the dry deposition. The depositions of the ionic components from natural sources (soil and sea) were higher than those from anthropogenic sources. The dry deposition velocities of the aerosols were found to be increasing with increase of their mass median diameters. The chemical composition of the dry deposition at Pune indicated maximum depositions of the alkaline substances, which are the main cause for the alkaline pH of rain water. Results of the present study have suggested that the atmospheric composition in the city is strongly influenced by natural sources rather than anthropogenic. 相似文献
16.
文章采用WPI水污染指数法评价滇池北岸各片区河道的水质,并分析其变化趋势,同时采用pearson相关分析方法研究旱季和雨季各片区河道WPI指数变化趋势的相关度。结果表明:1988-2001年滇池北岸河道水质污染主要为减轻的趋势;2001-2007年随着昆明市的大规模扩张,其加重趋势非常明显;2007-2009年,随着河道水环境综合整治工程的大规模开展,又主要表现为减轻趋势,且旱季水质污染减轻的趋势比雨季明显,在纳入统计的5个片区河道中,旱季有4个片区河道水质好转,雨季有3个片区河道水质好转。这是由于2007-2009年间开展的河道水环境综合整治工程主要针对点源污染控制。此外,由于面源污染特征在5个片区中的4个片区都非常相似,雨季各片区河道WPI指数变化趋势的相关度比旱季高。 相似文献
17.
In order to investigate the feasibility of sequential removal NO and SO_2 using non-thermal plasma and adsorbent simultaneously,the removal of NO and SO_2 from dry gas stream(NO/SO_2/N_2/O_2)with very little O_2 using non-thermal plasma was investigated using a coaxial dielectric barrier discharge.Comparative experiments were carried out in the dry gas stream with and without Ar respectively at O_2 concentration of 0.1%.The results showed that NO could be removed remarkably and it would be enhanced in the presence of Ar in the dry gas stream.It seems that SO_2 could not be removed unless there is Ar in the dry gas stream.The mechanism of removal of NO and SO_2 in the dry gas stream was discussed. 相似文献
18.
19.
上海地区不同类和不同强度灰霾季节分布特征 总被引:1,自引:0,他引:1
主要采用美国宇航局(NASA)2007年1月-2010年11月CALIPSO卫星搭载的正交极化云-气溶胶激光雷达(CALIOP)L1产品及地面气象观测资料,分析得到上海地区干霾和湿霾、不同强度灰霾天气的季节分布特征,并重点研究了发生干霾时气溶胶散射强度、粒子规则性和尺度大小随季节的变化规律。结果表明:灰霾的发生具有较明显的季节性,春季为干霾高发期,其次是夏冬季;夏冬两季轻度以上干霾发生比例均大于春季与秋季;大气中主要以小尺度、较规则的气溶胶粒子为主;干霾时,气溶胶粒子和不同量级色比值所占比例季节变化不大;夏季发生干霾时小尺度粒子所占比例最大。 相似文献