全文获取类型
收费全文 | 383篇 |
免费 | 1篇 |
国内免费 | 10篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 36篇 |
环保管理 | 25篇 |
综合类 | 50篇 |
基础理论 | 48篇 |
污染及防治 | 151篇 |
评价与监测 | 42篇 |
社会与环境 | 22篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 8篇 |
2022年 | 29篇 |
2021年 | 32篇 |
2020年 | 10篇 |
2019年 | 8篇 |
2018年 | 15篇 |
2017年 | 21篇 |
2016年 | 21篇 |
2015年 | 11篇 |
2014年 | 23篇 |
2013年 | 66篇 |
2012年 | 11篇 |
2011年 | 15篇 |
2010年 | 11篇 |
2009年 | 11篇 |
2008年 | 12篇 |
2007年 | 16篇 |
2006年 | 9篇 |
2005年 | 8篇 |
2004年 | 9篇 |
2003年 | 8篇 |
2002年 | 9篇 |
2001年 | 3篇 |
2000年 | 2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394条查询结果,搜索用时 31 毫秒
81.
Vulnerability assessment and adaptation to the impacts of sea level rise on the Kingdom of Bahrain 总被引:2,自引:0,他引:2
S. Al-Jeneid M. Bahnassy S. Nasr M. El Raey 《Mitigation and Adaptation Strategies for Global Change》2008,13(1):87-104
This paper assesses quantitatively the impact of sea level rise (SLR) at the global and regional scale as a result of climate
change (CC) on the coastal areas of the Kingdom of Bahrain’s islands (36 Islands). The standard Intergovernmental Panel on
Climate Change (IPCC) guidelines was modified as appropriate for the situation of the study area. Geographic Information Systems
(GIS) coupled with Remote Sensing (RS) were used as the main techniques of collecting, analyzing, modeling simulating and
disseminating information to build SLR scenarios in a geographically referenced context. Also, these tools were used to assess
vulnerability and risk of the coastal area of the islands with the expectation that coastal planner and government authorities
will profit from integrating these knowledge into a broad based environmental decision making. Three SLR scenarios: low, moderate
and high were developed to examine the impacts from SLR on all islands. The low SLR scenario (Optimistic) assumes a 0.5-m
rise above current sea level, the moderate scenario (Intermediate) assumes a one meter rise, and the high scenario (Pessimistic)
assumes a 1.5 m rise in sea level. Two more SLR scenarios were assumed to perform risk analysis, a 2 and 5 meter rise above
current sea level. The simulation of SLR are quite straightforward, emphasizing on the uses of both of the data that are incorporated
from the satellite images and the created Digital Elevation Model (DEM) to estimate SLR scenarios that are adapted in the
study. These data were used to predict consequences of the possibility of the rise in sea level at different scenarios which
may alter the landuse and patterns of human communities. Results indicate that low-lying coastal areas of Bahrain islands
are at risk from the effects of any SLR resulting from CC. These islands are vulnerable under different SLR Scenarios. More
than 17% of the country total area may be inundated under 1.5 m SLR in 2100. The total area that might be lost under different
sea level scenarios will vary from more than 77 km2 if SLR reaches 0.5 m, to about 100 km2 under 1.0 m SLR and may reach 124 km2 under 1.5 m SLR scenario. The total inundated areas due to risk scenarios will reach 133 km2, if the SLR rises to 2.0 m, and it is estimated to be more than (22%) of the main island total area. Under the second scenario,
if the SLR reaches 5.0 m, the main islands will lose approximately half of its area (47%) equal to 280 km2. Hawar islands group will lose about (30%) of its total area under 2.0 m SLR, which is about 15.5 km2.A SLR adaptation policy framework (APF) and adaptation policy initiatives (APIs) are suggested for planners to build upon
for reducing the likely effects of SLR in the Kingdom of Bahrain. The framework is composed of four steps namely, acquisition
of information, planning and design, implementation and monitoring and evaluation. A general policy framework for a national
response to SLR is suggested. Additionally, a range of policy adaptation options/initiatives to sustain coastal developments
under the likely effects of SLR are recommended. 相似文献
82.
Essawy Amina E. sherif Soheir S. El Osman Gamalat Y. Morshedy Rehab M. El Al-Nasser Abir S. Sheir Sherin K. 《Environmental science and pollution research international》2022,29(11):15800-15815
Environmental Science and Pollution Research - Nanoparticle (NP) pollution is a worldwide problem. Copper oxide nanoparticles (CuO NPs) are one of the most used NPs in a variety of applications,... 相似文献
83.
From September through November 1994, the U.S. Environmental Protection Agency (EPA) conducted a field demonstration of the remediation of highly contaminated groundwater at the Nascolite Superfund site located in Millville, New Jersey. Besides high concentrations of the major contaminant, methyl methacrylate (MMA), the groundwater also contained small amounts of volatile and semivolatile organic compounds. ZenoGem® technology, an integrated bioreactor and ultrafiltration membrane system, was employed for this demonstration project. Approximately 30,000 gallons of groundwater containing MMA in concentrations of 567 to 9,500 milligrams per liter (mg/L) and chemical oxygen demand (COD) values ranging from 1,490 to 19,600 mg/L was treated. The demonstration focused on the system's ability to remove MMA and reduce COD from the groundwater. Results of the three‐month demonstration showed that average MMA and COD removal efficiencies were greater than 99.9 and 86.9, respectively. The total cost of treatment, depending on the duration of the project, is estimated to vary from $0.22 to $0.55 (in 1994 dollars) per gallon of groundwater treated. © 2001 John Wiley & Sons. 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.
Sana Saqrane Issam El Ghazali Brahim Oudra L. Bouarab Vitor Vasconcelos 《Journal of environmental science and health. Part. B》2013,48(5):443-451
The effects of cyanobacteria aqueous extracts containing Microcystin-LR (MC-LR) on the seed germination and growth of Pisum sativum, Lens esculenta, Zea mays and Triticum durum were investigated. Experiments were carried out on a range of doses of the extract (equivalent to 0, 1.6, 2.9, 5.8, 8.7 and 11.6 μ g MC-LR/mL). The results confirm that these plants were sensitive to cell-free extracts of a toxic Microcystis and that germination inhibition was dose dependent. One-way analysis of variance (ANOVA) showed that P. sativum is the most sensitive tested species with a 97% germination rate reduction and L. esculenta was the most resistant. At the 8th day, the exposure to the microcystins (MC) resulted in a significant decrease of plant epicotyls length, roots length and a net inhibition of lateral root formation. It is concluded that MC could affect also terrestrial plants seedling germination and growth. Therefore, the use of water for irrigation contaminated by MC could exert negative biochemical effects on seed and plant metabolism which might influence the agricultural crops. 相似文献
89.
Lourdes Teresinha Kist Said El Moutaqi Ênio Leandro Machado 《Journal of Cleaner Production》2009,17(13):1200-1205
This study included the layout characterization for the production process of a poultry slaughterhouse using qualitative and quantitative flow charts for water management; analysis of general parameters for pollution load in the wastewater produced in critical stages of the production process and assessment of environmental impact indicators. Prognoses for cleaner production based on water management were established. The diagnostic stage revealed that the scalding, pre-chilling, separated points of wastewater disposal for the wastewater treatment plant and disposal of treated and non-reused wastewater were critical for water management. Dissolved oxygen depletion and eutrophication account for the major environmental impacts of these wastewaters, resulting in an environmental pressure index of 32.1. The opportunities for cleaner production implementation resulting from this study include the reuse of wastewaters from pre-chilling and chilling for pre-washing of carcasses, since average temperatures of these wastewaters range between 4 and 16 °C. This will contribute to lowering the oil and grease pollution load. Another strategy concerns the standardization of cleaning procedures with rational water use in all work shifts and implementation of water meters on a sector-by-sector basis. In the latter case, which has already been implemented, water consumption was reduced by 13%. 相似文献
90.