全文获取类型
收费全文 | 212篇 |
免费 | 0篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 6篇 |
废物处理 | 13篇 |
环保管理 | 26篇 |
综合类 | 30篇 |
基础理论 | 37篇 |
污染及防治 | 81篇 |
评价与监测 | 12篇 |
社会与环境 | 6篇 |
灾害及防治 | 5篇 |
出版年
2023年 | 4篇 |
2022年 | 9篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 7篇 |
2018年 | 7篇 |
2017年 | 7篇 |
2016年 | 13篇 |
2015年 | 2篇 |
2014年 | 8篇 |
2013年 | 22篇 |
2012年 | 11篇 |
2011年 | 10篇 |
2010年 | 4篇 |
2009年 | 8篇 |
2008年 | 8篇 |
2007年 | 8篇 |
2006年 | 10篇 |
2005年 | 11篇 |
2004年 | 9篇 |
2003年 | 5篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1961年 | 2篇 |
1959年 | 1篇 |
1954年 | 1篇 |
1953年 | 1篇 |
1923年 | 1篇 |
排序方式: 共有216条查询结果,搜索用时 0 毫秒
11.
12.
M. Usman P. Faure C. Lorgeoux C. Ruby K. Hanna 《Environmental science and pollution research international》2013,20(1):22-30
Soil pollution by hydrocarbons (aromatic and aliphatic hydrocarbons) is a major environmental issue. Various treatments have been used to remove them from contaminated soils. In our previous studies, the ability of magnetite has been successfully explored to catalyze chemical oxidation for hydrocarbon remediation in batch slurry system. In the present laboratory study, column experiments were performed to evaluate the efficiency of magnetite catalyzed Fenton-like (FL) and activated persulfate (AP) oxidation for hydrocarbon degradation. Flow-through column experiments are intended to provide a better representation of field conditions. Organic extracts isolated from three different soils (an oil-contaminated soil from petrochemical industrial site and two soils polluted by polycyclic aromatic hydrocarbon (PAH) originating from coking plant sites) were spiked on sand. After solvent evaporation, spiked sand was packed in column and was subjected to oxidation using magnetite as catalyst. Oxidant solution was injected at a flow rate of 0.1 mL min?1 under water-saturated conditions. Organic analyses were performed by GC–mass spectrometry, GC–flame ionization detector, and micro-Fourier transform infrared spectroscopy. Significant abatement of both types of hydrocarbons (60–70 %) was achieved after chemical oxidation (FL and AP) of organic extracts. No significant by-products were formed during oxidation experiment, underscoring the complete degradation of hydrocarbons. No selective degradation was observed for FL with almost similar efficiency towards all hydrocarbons. However, AP showed less reactivity towards higher molecular weight PAHs and aromatic oxygenated compounds. Results of this study demonstrated that magnetite-catalyzed chemical oxidation can effectively degrade both aromatic and aliphatic hydrocarbons (enhanced available contaminants) under flow-through conditions. 相似文献
13.
Trends and issues in land and water resources management: Setting the agenda for change 总被引:1,自引:0,他引:1
The classical model of a paradigm shift is used to explore changes that are occurring in public lands and water resources
management. Recent policy developments suggest that the traditional paradigm, which is characterized by sustained yield, is
in the process of being invalidated. While no new paradigm has been fully accepted, the emerging paradigm does appear to be
based on two principles: ecosystem management and collaborative decision making. Implementation of these two principles is
likely to require extensive revision of traditional management practices and institutions. Failure to address these issues
could result in adoption of the rhetoric of change without any lasting shift in management practices or professional attitudes. 相似文献
14.
15.
Kelly KE Wagner DA Lighty JS Sarofim AF Bretecher B Holden B Helgeson N Sahay K Nardi Z 《Journal of the Air & Waste Management Association (1995)》2004,54(1):83-92
In-service diesel engines are a significant source of particulate matter (PM) emissions, and they have been subjected to increasingly strict emissions standards. Consequently, the wide-scale use of some type of particulate filter is expected. This study evaluated the effect of an Engelhard catalyzed soot filter (CSF) and a Rypos electrically heated soot filter on the emissions from in-service diesel engines in terms of PM mass, black carbon concentration, particle-bound polycyclic aromatic hydrocarbon concentration, and size distribution. Both filters capture PM. The CSF relies on the engine's exhaust to reach the catalyst regeneration temperature and oxidize soot, whereas the electrically heated filter contains a heating element to oxidize soot. The filters were installed on several military diesel engines. Particle concentrations and compositions were measured before and after installation of the filter and again after several months of operation. Generally, the CSF removed at least 90% of total PM, and the removal efficiency improved or remained constant after several months of operation. In contrast, the electrical filters removed 44-69% of PM mass. In addition to evaluating the soot filters, the sampling team also compared the results of several real-time particle measurement instruments to traditional filter measurements of total mass. 相似文献
16.
Gilad Heinisch Aldo Corriero Antonio Medina Francisco J. Abascal Jose-Miguel de la Serna Robert Vassallo-Agius Antonio Belmonte Ríos Antonio García Fernando de la Gándara Christian Fauvel Christopher R. Bridges Constantinos C. Mylonas Saadet F. Karakulak Isik Oray Gregorio De Metrio Hanna Rosenfeld Hillel Gordin 《Marine Biology》2008,154(4):623-630
Atlantic bluefin tuna (BFT; Thunnus thynnus) is a migrating species straddling the North Atlantic Ocean and Mediterranean Sea. It is assumed that this species is divided
into a western and an eastern stock, which spawn in the Gulf of Mexico and the Mediterranean Sea, respectively. To learn more
about the reproductive behavior of the eastern BFT stock, we tracked gonadal development in adult fish that were sampled between
April and July during three consecutive years (2003–2005). Sampling campaigns were carried out using common fishing methods
at selected locations within the Mediterranean Sea, namely Levantine Sea, Malta, and Balearic Islands. An additional sampling
point, Barbate, was situated northwest of the Straits of Gibraltar along the Atlantic coast. Morphometric parameters such
as the total body mass (M
B) and the weights of the gonads (M
G) were recorded, and the respective gonadosomatic index (GSI) values were calculated. The data collected revealed two important
trends: (1) GSI values are higher in fish caught in the eastern rather than the western locations across the Mediterranean
Sea, and (2) the GSI reaches maximum values between late May and early June in Levantine Sea (eastern Mediterranean Sea),
and only 2 and 4 weeks later in the central (Malta) and western (Balearic Islands) locations, respectively. The advanced gonadal
development in BFT correlates well with higher sea surface temperatures. Our findings also distinguish the northern Levantine
Sea BFT population (mean M
B 78.41 ± 4.13 kg), and the Barbate BFT population with the greatest M
B (all fish sampled > 100 kg). These data reflect a situation in which the eastern Mediterranean basin may function as a habitat
for young BFT, until they gain a larger M
B and are able to move to the Atlantic Ocean. However, the existence of genetically discrete BFT populations in the Mediterranean
Sea cannot be ruled out. 相似文献
17.
Uhrner U Zallinger M von Löwis S Vehkamäki H Wehner B Stratmann F Wiedensohler A 《Journal of the Air & Waste Management Association (1995)》2011,61(4):399-408
A major source of particle number emissions is road traffic. However, scientific knowledge concerning secondary particle formation and growth of ultrafine particles within vehicle exhaust plumes is still very limited. Volatile nanoparticle formation and subsequent growth conditions were analyzed here to gain a better understanding of "real-world" dilution conditions. Coupled computational fluid dynamics and aerosol microphysics models together with measured size distributions within the exhaust plume of a diesel car were used. The impact of soot particles on nucleation, acting as a condensational sink, and the possible role of low-volatile organic components in growth were assessed. A prescribed reduction of soot particle emissions by 2 orders of magnitude (to capture the effect of a diesel particle filter) resulted in concentrations of nucleation-mode particles within the exhaust plume that were approximately 1 order of magnitude larger. Simulations for simplified sulfuric acid-water vapor gas-oil containing nucleation-mode particles show that the largest particle growth is located in a recirculation zone in the wake of the car. Growth of particles within the vehicle exhaust plume up to detectable size depends crucially on the relationship between the mass rate of gaseous precursor emissions and rapid dilution. Chassis dynamometer measurements indicate that emissions of possible hydrocarbon precursors are significantly enhanced under high engine load conditions and high engine speed. On the basis of results obtained for a diesel passenger car, the contributions from light diesel vehicles to the observed abundance of measured nucleation-mode particles near busy roads might be attributable to the impact of two different time scales: (1) a short one within the plume, marked by sufficient precursor emissions and rapid dilution; and (2) a second and comparatively long time scale resulting from the mix of different precursor sources and the impact of atmospheric chemistry. 相似文献
18.
Recent studies have revealed the importance of self-consistency in evolutionary models, particularly in the context of male–female
interactions. This has been largely ignored in models of the ancestral divergence of the sexes, i.e., the evolution of anisogamy.
Here, we model the evolution of anisogamy in a Fisher-consistent context, explicitly taking into account the number of interacting
individuals in a typical reproductive group. We reveal an interaction between the number of adult individuals in the local
mating group and the selection pressures responsible for the divergence of the sexes. The same underlying model can produce
anisogamy in two different ways. Gamete competition can lead to anisogamy when it is relatively easy for gametes to find each
other, but when this is more difficult and gamete competition is absent, gamete limitation can provide another route for anisogamy
to evolve. In line with earlier models, organismal complexity favors anisogamy. We argue that the early contributions of Kalmus
and Scudo, largely dismissed as group selectionist, are valid under certain conditions. Linking their work with the contributions
of Parker helps to explain why precisely males keep producing more sperm than can ever lead to offspring: sperm could evolve
to provision zygotes but this brings little profit for the effort required, because sperm would have to be equipped with provisioning
ability before it is known which sperm will make it to the fertilization stage. This insight creates a logical link between
paternal care under uncertain paternity (where again investment is selected against when some investment never brings about
genetic benefits) and gamete size evolution. 相似文献
19.
Helena Bichão Anna-Karin Borg-Karlson Atle Wibe Jorge Araújo Hanna Mustaparta 《Chemoecology》2005,15(4):211-226
Summary. An important question in insect-plant interactions is which of the numerous plant compounds contribute to the perception of
odour qualities in herbivorous insects and are likely to be used as cues in host-searching behaviour. In order to identify
which plant-produced volatiles the strawberry blossom weevil Anthonomus rubi detects, we have used electrophysiological recordings from single olfactory neurones linked to gas chromatography and mass
spectrometry. We here present 15 receptor neurone types specialised for naturally produced compounds present in the host and
nonhost plants and two types for two aggregation pheromone components. The active compounds were terpenoids, aromatic and
aliphatic esters, alcohols and aldehydes, some of which are induced by feeding activity of the weevils. The neurones were
characterised by a strong response to one or two primary odorants and weaker responses to a few others having similar chemical
structure. With one exception, the molecular receptive range of each neurone type was within one chemical group. Enantiomers
of linalool separated on a chiral column activated two neurone types with different enantioselectivity. Inhibition by linalool
of another neurone type, excited by α-pinene, indicated an additional mechanism for coding the information about this compound.
Altogether, detection of 54 compounds by olfactory receptor neurones is shown, of which 40 have been chemically identified
in this study. Thus A. rubi has the ability to detect a large number of odorants that may be used in host selection behaviour. 相似文献
20.
Timothy M. Gilmore Thomas R. Hanna 《Journal of the Air & Waste Management Association (1995)》2013,63(5):535-539
The so-called “Six Month Study” of the air toxics problem in the United States was initiated in November 1983 by the U.S. Environmental Protection Agency. The study focused on the magnitude, nature, and distribution of the problem—three major issues that were felt to be most useful to policy makers as they attempted to define the scope and direction of a national program for controlling toxic air pollutants. The following paper is based on a draft staff report on the study released for review in September 1984. The report has not been formally released by the U.S. EPA; a final report is due by late spring of 1985. 相似文献