全文获取类型
收费全文 | 385篇 |
免费 | 1篇 |
国内免费 | 12篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 24篇 |
环保管理 | 28篇 |
综合类 | 55篇 |
基础理论 | 52篇 |
污染及防治 | 153篇 |
评价与监测 | 45篇 |
社会与环境 | 22篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 8篇 |
2022年 | 30篇 |
2021年 | 30篇 |
2020年 | 11篇 |
2019年 | 9篇 |
2018年 | 14篇 |
2017年 | 21篇 |
2016年 | 20篇 |
2015年 | 14篇 |
2014年 | 21篇 |
2013年 | 69篇 |
2012年 | 12篇 |
2011年 | 15篇 |
2010年 | 10篇 |
2009年 | 11篇 |
2008年 | 12篇 |
2007年 | 16篇 |
2006年 | 11篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2002年 | 8篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1979年 | 1篇 |
1975年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1967年 | 1篇 |
1965年 | 2篇 |
1964年 | 1篇 |
1963年 | 2篇 |
1962年 | 1篇 |
1956年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有398条查询结果,搜索用时 31 毫秒
81.
Meryem Hadidi Bouchaib Bahlaouan Fatimazahra Boutaleb Ghita Radi Benjelloun Alla Silkina Said El Antri Nadia Boutaleb 《环境质量管理》2023,32(4):255-265
The increase in animal and agro-industrial production must be accompanied by the development of appropriate waste and by-product management strategies. Anaerobic digestion is a promising approach to recycle these wastes and reintegrate them into the economic production cycle of biogas and biofertilizer. In order to improve the performance of the anaerobic mesophilic digestion of abundant agro-industrial wastes constituted by potato peel (PP), and poultry waste (PW) and study the contribution of bovine bone meal (BB) as additive rich in phosphorus, which can help to neutralize the acidity of the substrate. The 10-point simplex-centroid design and the isoresponse surfaces strategy were used. This study demonstrated that in mesophilic bio-digestion, the using bovine bones in admixture with agroindustrial residue provided for the proper balance of chemical components required for proliferation of microbiological agent of bioconversion, which also resulted in an increase in biogas production capacity. The best formula was so composed by 66.67% bovine bone, 16.67% potatoes peel, and 16.67% poultry waste. The stability was achieved here after only 12 days. The digestate generated from it was fulfilled with the microbiological and chemical requirements for safety defined by the NF U44-551 standard. Germination test revealed that this optimal produced digestate, did not hinder growth, in fact, almost 85% of seed was germinated. Finally, fertilization experiments prove that this digestate can boost the growth of bell pepper (Capsicum annuum). 相似文献
82.
Hemdan Bahaa Ahmed El Nahrawy Amany Mohamed Mansour Abdel-Fatah M. Hammad Ali Belal Abou 《Environmental science and pollution research international》2019,26(10):9508-9523
Environmental Science and Pollution Research - We used a green sol–gel synthesis method to fabricate a novel nanoporous copper aluminosilicate (CAS) material. Nanoporous CAS was characterized... 相似文献
83.
N. M. Harpy A. M. Sallam A. A. Nada A. E. El Aassy M. G. El Feky 《Environmental Forensics》2020,21(1):11-20
AbstractUranium mining and ore processing are known to be harmful to the environment and human health if the waste generated is not managed properly. The aim of the present study is to determine the radiological indices in the mill tailings and review the possible attempts to utilize and minimize its hazardous effect. The activity concentrations of natural radionuclides, 238U, 232Th, 226Ra, and 40K have been measured by gamma spectrometry using HP-Ge detector. The average activity concentrations of 238U, 232Th, 226Ra, and 40K in the tailings wastes were 2071.8, 59.92, 6921.262, and 445. 57?Bq/kg respectively which are higher than the international average limit. The ranges of hazard indices such as Radium equivalent activity (Raeq), external hazard index (Hex), internal hazard index (Hin), γ-radiation hazard index Iγ, Dose rate (nGy/h) and annual effective dose equivalent (AED), were estimated. Uraniumm isotopic ratios in the ore –material and mill tailing samples indicate migration out of radionuclides to the surrounding environment causing contamination and many dangerous diseases. Fairly, all investigated tailing waste samples do not satisfy the universal standards, the studied wastes relatively still have high uranium contents and need reprocessing. 相似文献
84.
As there is only rare and scattered published information about the process control in industrial incineration facilities for municipal solid waste (MSW), a survey of the literature has been supplemented by a number of waste incineration site visits in Belgium and The Netherlands, in order to make a realistic assessment of the current status of technology in the area. Owing to the commercial character, and therefore, the confidentiality restrictions imposed by plant builders and many of the operators, much of the information collected has either to be presented in a generalized manner, and in any case anonymously. The survey was focused on four major issues: process control strategy, process control systems, monitors used for process control and finally the correlation between the 850 degrees C/2 s rule in the European waste incineration directive and integrated process control. The process control strategies range from reaching good and stable emissions at the stack to stabilizing and maximizing the energy output from the process. The main indicator to be monitored, in cases in which the focus is controlling emissions, is the oxygen content in the stack. Keeping the oxygen concentration in a determined range (usually between 8 and 12 vol.%) ensures stable and tolerated concentrations of the gaseous emissions. In the case for which stabilization of energy production is the principal aim, the main controlled parameter is the steam temperature and flow-rate, which is usually related to the fuel energetic input. A lot of other parameters are used as alarm criteria, the most common of which is the carbon monoxide concentration. The process control systems used most commonly feature partially automated classical proportional integral derivative (PID) controllers. New and innovative process control systems, such as fuzzy-logic control systems, are still unknown to most plant managers while their performance is reported to be unsatisfactory in plants in which such systems have been tested or are in use. Monitoring components used in process control are still based on classical tools such as thermocouples. The use of modern and more reliable sensors is very limited due to the high initial investment cost or simply the fear of using non-standard technologies. Complying with the 850 degrees C/2 s rule in the European waste incineration directive generally is seen to be a handicap for the process control, either in terms of cost, or flexibility of reaction, or both, particularly in old incineration facilities where such restrictions were not planned in the design. 相似文献
85.
86.
Inorganic mercury and methylmercury in surface sediments and mussel tissues from a microtidal lagoon (Bizerte, Tunisia) 总被引:1,自引:0,他引:1
N. Mzoughi T. Stoichev M. Dachraoui A. El Abed D. Amouroux O. F. X. Donard 《Journal of Coastal Conservation》2002,8(2):141-145
The aim of this study was to investigate the distribution of mercury compounds in marine sediments and mussel tissues collected
in the lagoon of Bizerte, Tunisia, during two seasons (summer and winter). Inorganic mercury (Hg2+) concentrations in sediments were found to be highly variable, ranging from 0.04 nmol.g1 to 3.22 nmol.g−1 (dry weight) with a mean value of 0.52 nmol.g−1. Anthropogenic sources of Hg2+, most probably metallurgy or tire production industries, have been evidenced. The mean concentration of monomethylmercury
(MeHg+) in the surface sediments is 2.32 pmol g−1 ranging from below the detection limit (0.45 pmol.g−1) to 14.6 pmol.g−1. No significant variation was observed between winter and summer seasons for both mercury species concentration in the sediments.
The Hg2+ concentrations in mussel tissues are also variable, ranging from 0.007 to 1.347 nmol.g−1 (dry weight). The mean concentration is 0.70 nmol.g−1. In these tisssues, Hg2+ is generally the major compound, making up ca. 88% of total mercury concentrations. However, methylmercury concentrations
are significant and homogeneous, ranging from 62 to 121 pmol.g−1 (mean 96 pmol.g−1). The results suggest that a fraction of the inorganic mercury load in the sediments of the lagoon undergoes methylation
pathways. MeHg+ produced is assimilated in the mussels more readily than Hg2+. 相似文献
87.
88.
This paper discusses the social science and engineering dimensions of search and rescue (SAR) in collapsed buildings. First, existing information is presented on factors that influence the behaviour of trapped victims, particularly human, physical, socioeconomic and circumstantial factors. Trapped victims are most often discussed in the context of structural collapse and injuries sustained. Most studies in this area focus on earthquakes as the type of disaster that produces the most extensive structural damage. Second, information is set out on the engineering aspects of urban search and rescue (USAR) in the United States, including the role of structural engineers in USAR operations, training and certification of structural specialists, and safety and general procedures. The use of computational simulation to link the engineering and social science aspects of USAR is discussed. This could supplement training of local SAR groups and USAR teams, allowing them to understand better the collapse process and how voids form in a rubble pile. A preliminary simulation tool developed for this purpose is described. 相似文献
89.
Climatic drivers of potential hazards in Mediterranean coasts 总被引:1,自引:1,他引:0
Agustín Sánchez-Arcilla Cesar Mösso Joan Pau Sierra Marc Mestres Ali Harzallah Mohamed Senouci Mohamed El Raey 《Regional Environmental Change》2011,11(3):617-636
This paper studies climatic drivers (air and water temperature, precipitation rates, river discharge, sea level and storm
patterns) in four Mediterranean regions: the Catalan-Valencia Coast (Spain), the Oran (Algeria) and Gabès (Tunisia) Gulfs
and the western Nile Delta (Egypt). The paper also considers the potential hazards that these drivers can induce. It first
analyses climatic trends in the drivers, taking into account the available time series of recorded and simulated meteo-oceanographic
data from different sources. Next, it presents the general framework to assess biogeophysical hazards (flooding, erosion,
droughts and water quality), followed by a simple and yet robust evaluation of those hazards for the four studied coastal
sites. Assuming climate change projections under different scenarios and considering the observed trends in drivers, the resulting
erosion rates due to sea-level rise and wave storm effects have been estimated. The Nile and Ebro Deltas, together with the
Oran Gulf, are more vulnerable than the Gulfs of Valencia and Gabès. Regarding water quality in terms of (a) precipitation
and dissolved oxygen in the water column and (b) sea surface temperature, the results show that the most vulnerable zones
for the projected conditions (a) are the Gulfs of Oran, Valencia and Gabès, while the Nile Delta is the region where the decrease
in water quality will be less pronounced. For the projected conditions (b), the most vulnerable zone is the Ebro Delta, while
the impact in the other three cases will be smaller and of comparable magnitude. Finally, the overall future impact of these
hazards (associated to climatic change) in the four sites is discussed in comparative terms, deriving some conclusions. 相似文献
90.
Ronan Cariou Philippe Marchand Aline Brosseaud El Mostafa Qannari Bruno Le Bizec 《Environmental pollution (Barking, Essex : 1987)》2010,158(3):941-4047
Current European Union regulation regarding polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) in food and feed is based on Toxic Equivalent Quotient (TEQ) concept. For confirmatory purpose, the isotope-dilution method associated to a measurement by gas chromatography coupled with high resolution mass spectrometry is usually the method of choice for precisely measuring the 29 target congeners in three separated fractions. Time and cost related to these analyses are very significant. Various kinds of screening concepts can be considered. In the present study, we elaborated and validated a prediction model for the 2005 World Health Organization TEQ in fish, based on the measurement of 4 PCDD/F and 2 non-ortho dl-PCB congeners, potentially analyzable in a single extracted fraction by gas chromatography coupled with mass spectrometry. Large independent datasets have been used for model elaboration (n = 108) and validation (n = 363, n = 357 and n = 6). 相似文献