全文获取类型
收费全文 | 794篇 |
免费 | 5篇 |
国内免费 | 11篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 6篇 |
环保管理 | 44篇 |
综合类 | 410篇 |
基础理论 | 129篇 |
污染及防治 | 146篇 |
评价与监测 | 32篇 |
社会与环境 | 25篇 |
灾害及防治 | 3篇 |
出版年
2019年 | 9篇 |
2018年 | 12篇 |
2017年 | 19篇 |
2016年 | 21篇 |
2015年 | 10篇 |
2014年 | 14篇 |
2013年 | 39篇 |
2012年 | 23篇 |
2011年 | 31篇 |
2010年 | 25篇 |
2009年 | 26篇 |
2008年 | 24篇 |
2007年 | 27篇 |
2006年 | 21篇 |
2005年 | 8篇 |
2004年 | 12篇 |
2003年 | 12篇 |
2002年 | 16篇 |
2001年 | 14篇 |
2000年 | 7篇 |
1999年 | 20篇 |
1998年 | 9篇 |
1996年 | 8篇 |
1995年 | 8篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1986年 | 7篇 |
1979年 | 7篇 |
1978年 | 7篇 |
1967年 | 6篇 |
1966年 | 8篇 |
1965年 | 7篇 |
1964年 | 8篇 |
1961年 | 9篇 |
1960年 | 6篇 |
1955年 | 7篇 |
1952年 | 6篇 |
1942年 | 6篇 |
1941年 | 8篇 |
1940年 | 9篇 |
1938年 | 6篇 |
1937年 | 12篇 |
1936年 | 10篇 |
1935年 | 9篇 |
1934年 | 11篇 |
1933年 | 7篇 |
1931年 | 7篇 |
1929年 | 8篇 |
1922年 | 6篇 |
1921年 | 7篇 |
排序方式: 共有810条查询结果,搜索用时 15 毫秒
801.
802.
Hal T. Nelson David von Hippel Tom Peterson Roman Garagulagian 《Journal of Environmental Planning and Management》2016,59(3):480-500
This paper evaluates the causes of the 23% decline in 2030 US greenhouse gas emissions forecasts between 2007 and 2011. Dynamic regression modeling predicts that the Great Recession contributed to about 67% of the 2008–2009 emissions decline, but then fell to about an 18% share for the 2030 emissions forecast. An analysis of electricity generation forecasts show that switching from coal to gas contributed only 6% to the total 2030 decline. In contrast, regulatory impact assessments and policy analysis showed that state and federal policies were responsible for 46% of the 2030 decline in emissions. 相似文献
803.
Sanda Iepure Virtudes Martinez-Hernandez Sonia Herrera Ruben Rasines-Ladero Irene de Bustamante 《Environmental science and pollution research international》2013,20(8):5813-5826
In order to evaluate the water quality at the surface/groundwater interface (hyporheic zone), the pattern of microcrustacean assemblages in response to environmental stress caused by urban industrial contamination was studied in the Jarama River basin (central Spain) during high water discharges (March and April 2011). The clustering of biological variables and the concentration of urban contaminants in hyporheic waters showed that pristine hyporheic waters have moderate species diversity (two to seven species) and dominance of k strategist stygobites, whereas excessively contaminated sites are devoid by crustaceans. An intermediate level of disturbance in hyporheic waters is associated with a peak of species taxonomic diversity (four to nine species) and proliferation of r strategist more tolerant species. Typical species found in hyporheic zone, e.g., Paracyclops imminutus (Copepoda, Cyclopoida), Cryptocandona vavrai (Ostracoda) and Herpetocypris chevreuxi (Ostracoda), were good indicators of high concentrations of Cr, Mn, Ni, Cd, Pb and VOCs; whereas the stygobites do not show any significant correlation. The effectiveness of hyporheic crustaceans as efficient bioindicators for assessing the current ecological status of river ecosystems is emphasised. 相似文献
804.
805.
R. K. M. Jayanty S. B. Tompkins D. J. von Lehmden 《Journal of the Air & Waste Management Association (1995)》2013,63(11):1505-1509
Audit materials containing Principal Organic Hazardous Constituents (POHCs) have been developed by EPA for use by Federal, State, and Local agencies or their contractors to assess the accuracy of measurement methods used during RCRA trial burn tests. Audit materials are currently available for 27 gaseous organics in five-, six-, seven-, and nine-component mixtures at ppb levels (7 to 10,000 ppb) in compressed gas cylinders in a balance gas of nitrogen. The logic used in selecting 27 gaseous organic compounds as audit materials and how these audit materials are successfully used in performance audits is described. Stability studies indicate that all of the organics tested (with the exception of ethylene oxide and propylene oxide below 10 ppb levels) are stable enough to be used as reliable audit materials. As of January 1990, 215 performance audits have been conducted to assess the accuracy of Volatile Organic Sampling Train (VOST) and bag measurement methods during or prior to RCRA trial burn tests. A summary of the audits conducted for each POHC, the measurement system audited, and the frequency of audits is described. The audit results obtained with audit gases are generally within ±50% of the audit concentrations. 相似文献
806.
Kristin Elgh Dalgren Anders DükerZandra Arwidsson Thomas von KronhelmPatrick A.W. van Hees 《Waste management (New York, N.Y.)》2011,31(2):215-224
In Sweden, leaching tests with deionized water (D.W.) are utilized in risk assessment of materials entering landfills, but implementation of these results to evaluate the risk of spreading of pollutants in the environment is difficult. One problem is that most leaching procedures only consider heavy metals release, whereas organic pollutants are left out. The aim of the present study was to assess the possible pollutant mitigation in four remediated soils, three with heavy metals and one with polycyclic aromatic hydrocarbons (PAH) contamination. The mitigation was evaluated by standardized batch and column leaching tests utilizing three different leaching solutions: D.W., a weak ionic solution (0.001 M CaCl2) and an artificially made soil water (ASW). In general, batch leaching tests implied larger contaminant removal than column leaching test, possibly due to the more rough treatment of the soil particles, and guidelines would at times be exceeded by the batch leaching test but not by column leaching tests. Utilization of CaCl2 was found to release less heavy metal than D.W., whereas the metals mobilized by ASW were removed from solution by the filtration of soil leachates. Low molecular weight PAH was most efficiently mobilized by CaCl2, while D.W. worked better for high molecular weight PAH. Despite very low initial PAH-concentrations, tap- and groundwater criteria were exceeded by all leaching solutions. 相似文献
807.
Erika von Schneidemesser Paul S. Monks Christian Plass-Duelmer 《Atmospheric environment (Oxford, England : 1994)》2010,44(39):5053-5064
Speciated volatile organic compound (VOC) and carbon monoxide (CO) measurements from the Marylebone Road site in central London from 1998 through 2008 are presented. Long-term trends show statistically significant decreases for all the VOCs considered, ranging from ?3% to ?26% per year. Carbon monoxide decreased by ?12% per year over the measurement period. The VOC trends observed at the kerbside site in London showed greater rates of decline relative to trends from monitoring sites in rural England (Harwell) and a remote high-altitude site (Hohenpeissenberg), which showed decreases for individual VOCs from ?2% to ?13% per year. Over the same 1998 through 2008 period VOC to CO ratios for London remained steady, an indication that emissions reduction measures affected the measured compounds equally. Relative trends comparing VOC to CO ratios between Marylebone Road and Hohenpeissenberg showed greater similarities than absolute trends, indicating that emissions reductions measures in urban areas are reflected by regional background locations. A comparison of VOC mixing ratios and VOC to CO ratios was undertaken for London and other global cities. Carbon monoxide and VOCs (alkanes greater than C5, alkenes, and aromatics) were found to be strongly correlated (>0.8) in the Annex I countries, whereas only ethene and ethyne were strongly correlated with CO in the non-Annex I countries. The correlation results indicate significant emissions from traffic-related sources in Annex I countries, and a much larger influence of other sources, such as industry and LPG-related sources in non-Annex I countries. Yearly benzene to ethyne ratios for London from 2000 to 2008 ranged from 0.17 to 0.29 and compared well with previous results from US cities and three global megacities. 相似文献
808.
Noel E. Palmer Ray von Wandruszka 《Environmental science and pollution research international》2010,17(7):1362-1370
Purpose
Dissolved humic acids abiotically reduced inorganic arsenic to varying degrees, depending on solution pH, ionic strength, and type of humate used. The functionalities of dissolved organic matter responsible for these redox reactions remained in question, but quinoid moieties undoubtedly played an important role. It is not fully understood whether the quinoids are solely responsible for arsenate reduction, and what the kinetics of the relevant processes are. 相似文献809.
Allner Bernhard von der Gönna Sabine Griebeler Eva-Maria Nikutowski Nadja Weltin Annette Stahlschmidt-Allner Petra 《Environmental science and pollution research international》2010,17(2):505-518
Background, aim, and scope
Impacts on the reproductive health of wild fish are thought to be suitable early-warning tools indicating contamination of surface waters with endocrine-disrupting compounds. Ecotoxicological assessment of these field observations depends on the availability of reliable biomarkers to enable a discrimination of natural variations of reproductive functions from anthropogenic impacts. 相似文献810.
van Dyk Cobus Nyoni Hlengilizwe Barnhoorn Irene 《Environmental science and pollution research international》2022,29(11):15729-15742
Environmental Science and Pollution Research - This paper reports on the seasonal and species comparison of hepatic nodular alterations in two indicator fish species from the hyper-eutrophic... 相似文献