全文获取类型
收费全文 | 15652篇 |
免费 | 135篇 |
国内免费 | 112篇 |
专业分类
安全科学 | 374篇 |
废物处理 | 598篇 |
环保管理 | 1762篇 |
综合类 | 3837篇 |
基础理论 | 3820篇 |
环境理论 | 12篇 |
污染及防治 | 3722篇 |
评价与监测 | 930篇 |
社会与环境 | 744篇 |
灾害及防治 | 100篇 |
出版年
2022年 | 150篇 |
2021年 | 132篇 |
2020年 | 105篇 |
2019年 | 122篇 |
2018年 | 219篇 |
2017年 | 192篇 |
2016年 | 289篇 |
2015年 | 247篇 |
2014年 | 354篇 |
2013年 | 1049篇 |
2012年 | 465篇 |
2011年 | 581篇 |
2010年 | 514篇 |
2009年 | 582篇 |
2008年 | 653篇 |
2007年 | 667篇 |
2006年 | 557篇 |
2005年 | 512篇 |
2004年 | 437篇 |
2003年 | 466篇 |
2002年 | 423篇 |
2001年 | 541篇 |
2000年 | 411篇 |
1999年 | 278篇 |
1998年 | 187篇 |
1997年 | 203篇 |
1996年 | 193篇 |
1995年 | 235篇 |
1994年 | 239篇 |
1993年 | 187篇 |
1992年 | 158篇 |
1991年 | 201篇 |
1990年 | 200篇 |
1989年 | 188篇 |
1988年 | 141篇 |
1987年 | 130篇 |
1986年 | 134篇 |
1985年 | 126篇 |
1984年 | 127篇 |
1983年 | 122篇 |
1982年 | 143篇 |
1981年 | 124篇 |
1980年 | 120篇 |
1979年 | 145篇 |
1978年 | 101篇 |
1977年 | 103篇 |
1975年 | 95篇 |
1973年 | 99篇 |
1967年 | 111篇 |
1957年 | 96篇 |
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
991.
Amorim MJ Pereira C Menezes-Oliveira VB Campos B Soares AM Loureiro S 《Environmental pollution (Barking, Essex : 1987)》2012,160(1):145-152
Chemicals are often found in the environment as complex mixtures. There has been a large effort in the last decade to assess the combined effect of chemicals, using the conceptual models of Concentration Addition and Independent Action, but also including synergistic, antagonistic, dose-level and dose-ratio dependent deviations from these models. In the present study, single and mixture toxicity of atrazine, dimethoate, lindane, zinc and cadmium were studied in Folsomia candida, assessing survival and reproduction. Different response patterns were observed for the different endpoints and synergistic patterns were observed when pesticides were present. Compared with the previously tested Enchytraeus albidus and Porcellionides pruinosus, the mixture toxicity pattern for F. candida was species specific. The present study highlights the importance of studying toxicity of chemicals mixtures due to the observed potentiation of effects and confirms that for an adequate ecologically relevant risk assessment different organisms and endpoints should be included. 相似文献
992.
Rüdel H Müller J Quack M Klein R 《Environmental science and pollution research international》2012,19(3):772-783
Background and aims
Hexabromocyclododecane (HBCD) is a brominated flame retardant used mainly in polystyrene foam as well as in textile applications. In recent years, measures were taken to reduce HBCD emissions during its production and use. To evaluate the efficacy of these measures, a monitoring project was initiated with fish as bioaccumulation indicators. 相似文献993.
Characterization of tannery sludge activated carbon and its utilization in the removal of azo reactive dye 总被引:1,自引:1,他引:0
Geethakarthi A Phanikumar BR 《Environmental science and pollution research international》2012,19(3):656-665
Introduction
The removal of azo Reactive Red 31(RR31) from synthetic dye solution using tannery sludge-developed activated carbon (TSC) was investigated. 相似文献994.
Dongo K Tiembré I Koné BA Zurbrügg C Odermatt P Tanner M Zinsstag J Cissé G 《Environmental science and pollution research international》2012,19(8):3192-3199
Introduction
On August 2006, a cargo ship illegally dumped 500?t of toxic waste containing high concentrations of hydrogen sulphide in numerous sites across Abidjan. Thousands of people became ill. Seventeen deaths were associated with toxic waste exposure.Materials and methods
This study reports on environmental and health problems associated with the incident. A cross-sectional transect study was conducted in five waste dumping site areas.Results
Of the households, 62.1% (n?=?502) were exposed to the effects of the pollutants and 51.1% of the interviewed people (n?=?2,368) in these households showed signs of poisoning. Most important symptoms were cough (37.1%), asthenia (33.1%), pruritus (29.9%) and nausea (29.1%).Discussion
The health effects showed different frequencies in the five waste impact sites. Among the poisoned persons, 21.1% (n?=?532) presented symptoms on the survey day (i.e., 4?months after incident). Transect sampling allowed to determine a radius of vulnerability to exposure of up to 3?km from the point of toxic waste disposal.Conclusion
The area of higher vulnerability is influenced by various environmental factors, such as size and severity of pollution site, duration of toxic waste pollution on the impact site and locally climatic conditions. The surveillance of effects on environment and human health is warranted to monitor the development. 相似文献995.
Demir S Saral A Ertürk F Kuzu SL Goncaloğlu BI Demir G 《Environmental science and pollution research international》2012,19(5):1503-1514
Introduction
The effect of diurnal changes in strengths of volatile organic compound (VOC) sources on the performances of positive matrix factorization (PMF) and principal component analysis (PCA) was investigated using ambient measurement results that were taken during daytime and nighttime hours between March 24 and May 14, 2011, within Davutpasa Campus of Yildiz Technical University (Istanbul, Turkey).Methods
Forty-five VOC species, ranging from C5 to C11 in volatility, were measured in the samples, 40 of which are included in the analyses. Ambient samples were grouped as daytime, nighttime, and all day datasets, and both PMF and PCA were applied to each dataset. A total of six source groups were extracted from each dataset: solvent use, general industrial paint use, gasoline and diesel vehicle exhausts, and biogenic as well as evaporative emissions. Estimated source contributions showed great diurnal variations.Results
The results suggested that extraction of possible sources by PCA depends greatly on the number of samples and the strength of the sources, while PMF produced stable results regardless of number of samples and source strengths.Conclusion
Although PMF was unable to resolve gasoline vehicle and evaporative emissions, it was found to be successful in explaining diurnal fluctuations in source strengths, while the performance of PCA depends on the strength of emission source. 相似文献996.
Bergmann A Bi Y Chen L Floehr T Henkelmann B Holbach A Hollert H Hu W Kranzioch I Klumpp E Küppers S Norra S Ottermanns R Pfister G Roß-Nickoll M Schäffer A Schleicher N Schmidt B Scholz-Starke B Schramm KW Subklew G Tiehm A Temoka C Wang J Westrich B Wilken RD Wolf A Xiang X Yuan Y 《Environmental science and pollution research international》2012,19(4):1341-1344
997.
Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007 总被引:2,自引:1,他引:1
998.
Morten E. Simonsen Martin B. S?rensen Erik G. S?gaard 《Environmental science and pollution research international》2012,19(9):3772-3781
Objective
This work aims to investigate the correlation between the photocatalytic activity determined by methylene blue bleaching (DIN 52980), stearic acid degradation, and degradation of acetone in gas phase.Method
The photocatalytic TiO2 coatings included in this investigation ranged from thin commercially available coatings (ActivTM and BioCleanTM) and ready to use suspensions (Nano-X PK1245) to lab-produced PVD and sol?Cgel coatings. XRD analysis of the photocatalytic coatings showed that all the coatings consisted of nanocrystalline anatase, although the thickness and porosity varied considerably.Results
The study showed that the reproducibility of the activity measurements was good. However, more importantly, the investigation showed that there is a good correlation between the activities determined by the different methods even though the characteristics of the photocatalytic coatings and the organic probe molecules varied considerably.Conclusion
The overall findings of this work suggest that there is a good correlation between the investigated methods. These results are promising for the future work concerning standardization of methods for determination of the activity of photocatalytic films. 相似文献999.
PURPOSE: 1,2,3-Trichloropropane (TCP) is a persistent groundwater pollutant and a suspected human carcinogen. It is also is an industrial chemical waste that has been formed in large amounts during epichlorohydrin manufacture. In view of the spread of TCP via groundwater and its toxicity, there is a need for cheap and efficient technologies for the cleanup of TCP-contaminated sites. In situ or on-site bioremediation of TCP is an option if biodegradation can be achieved and stimulated. This paper presents an overview of methods for the remediation of TCP-contaminated water with an emphasis on the possibilities of biodegradation. CONCLUSIONS: Although TCP is a xenobiotic chlorinated compound of high chemical stability, a number of abiotic and biotic conversions have been demonstrated, including abiotic oxidative conversion in the presence of a strong oxidant and reductive conversion by zero-valent zinc. Biotransformations that have been observed include reductive dechlorination, monooxygenase-mediated cometabolism, and enzymatic hydrolysis. No natural organisms are known that can use TCP as a carbon source for growth under aerobic conditions, but anaerobically TCP may serve as electron acceptor. The application of biodegradation is hindered by low degradation rates and incomplete mineralization. Protein engineering and genetic modification can be used to obtain microorganisms with enhanced TCP degradation potential. 相似文献
1000.
Bonifacio HF Maghirang RG Auvermann BW Razote EB Murphy JP Harner JP 《Journal of the Air & Waste Management Association (1995)》2012,62(3):350-361
Open beef cattle feedlots emit various air pollutants, including particulate matter (PM) with equivalent aerodynamic diameter of 10 microm or less (PM10); however limited research has quantified PM10 emission rates from feedlots. This research was conducted to determine emission rates of PM10 from large cattle feedlots in Kansas. Concentrations of PM10 at the downwind and upwind edges of two large cattle feedlots (KS1 and KS2) in Kansas were measured with tapered element oscillating microbalance (TEOM) PM10 monitors from January 2007 to December 2008. Weather conditions at the feedlots were also monitored. From measured PM10 concentrations and weather conditions, PM10 emission rates were determined using reverse modeling with the American Meteorological Society/U.S. Environmental Protection Agency Regulatory Model (AERMOD). The two feedlots differed significantly in median PM10 emission flux (1.60 g/m2-day for KS1 vs. 1.10 g/m2-day for KS2) but not in PM10 emission factor (27 kg/1000 head-day for KS1 and 30 kg/1000 head-day KS2). These emission factors were smaller than published U.S. Environmental Protection Agency (EPA) emission factor for cattle feedlots. 相似文献