全文获取类型
收费全文 | 349篇 |
免费 | 6篇 |
国内免费 | 15篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 42篇 |
环保管理 | 48篇 |
综合类 | 33篇 |
基础理论 | 65篇 |
污染及防治 | 93篇 |
评价与监测 | 53篇 |
社会与环境 | 19篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 7篇 |
2022年 | 35篇 |
2021年 | 23篇 |
2020年 | 9篇 |
2019年 | 10篇 |
2018年 | 21篇 |
2017年 | 18篇 |
2016年 | 17篇 |
2015年 | 13篇 |
2014年 | 10篇 |
2013年 | 46篇 |
2012年 | 24篇 |
2011年 | 19篇 |
2010年 | 17篇 |
2009年 | 14篇 |
2008年 | 11篇 |
2007年 | 9篇 |
2006年 | 4篇 |
2005年 | 14篇 |
2004年 | 2篇 |
2003年 | 6篇 |
2002年 | 2篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 6篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1965年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有370条查询结果,搜索用时 15 毫秒
281.
Transformation of nitrogen dioxide into ozone and prediction of ozone concentrations using multiple linear regression techniques 总被引:1,自引:0,他引:1
Nurul Adyani Ghazali Nor Azam Ramli Ahmad Shukri Yahaya Noor Faizah Fitri MD Yusof Nurulilyana Sansuddin Wesam Ahmed Al Madhoun 《Environmental monitoring and assessment》2010,165(1-4):475-489
Analysis and forecasting of air quality parameters are important topics of atmospheric and environmental research today due to the health impact caused by air pollution. This study examines transformation of nitrogen dioxide (NO2) into ozone (O3) at urban environment using time series plot. Data on the concentration of environmental pollutants and meteorological variables were employed to predict the concentration of O3 in the atmosphere. Possibility of employing multiple linear regression models as a tool for prediction of O3 concentration was tested. Results indicated that the presence of NO2 and sunshine influence the concentration of O3 in Malaysia. The influence of the previous hour ozone on the next hour concentrations was also demonstrated. 相似文献
282.
Nuray Balkis Abdullah Aksu Erdoğan Okuş Reşat Apak 《Environmental monitoring and assessment》2010,167(1-4):359-370
The contents of heavy metals (Fe, Mn, Pb, Cu, Cd, and Hg) dissolved in water and suspended solids of Gökova Bay—partly and fully sampled in 2005 and 2006, respectively—are quite higher than the average values encountered in uncontaminated sea water. The high concentrations are associated with terrestrial inputs from the mining zones and anthropogenic (domestic + industrial) sources. Moreover, the distribution of Fe and Cu is affected by primary production because these elements function as nutrients in biological activities. The Cr, Ni, and Fe concentrations of surface sediments are above the shale average. The Cr and Ni contents of surface sediments representative of river mouths strongly correlate with total phosphorus contents. In a sulfide-poor environment, Pb and Cu were concentrated at a higher ratio in surface sediments than Cd, probably due to higher stabilities of their surface complexes with amorphous iron oxides and clay minerals existing as major components in the sediments. The exceptional enrichment of Zn may be attributed to double oxide formation with amorphous iron oxides in sediments. The high metal values are most probably caused by terrestrial inputs from anthropogenic sources and the mining zones at the southeast part of the bay. The Al, Mn, Pb, Cu, Zn, and Hg contents are below the shale average. The low values have possibly originated from the coarse-grained sandy sediments having a low affinity for metals. There are no distinct differences in the metal distributions in water and suspended matter between the years 2005 and 2006 in the bay, probably due to low sedimentation rates. 相似文献
283.
Bal R Türk G Tuzcu M Yilmaz O Kuloglu T Gundogdu R Gür S Agca A Ulas M Cambay Z Tuzcu Z Gencoglu H Guvenc M Ozsahin AD Kocaman N Aslan A Etem E 《Journal of environmental science and health. Part. B》2012,47(5):434-444
In the current study it was aimed to investigate the toxicity of low doses of imidacloprid (IMI) on the reproductive organ systems of adult male rats. The treatment groups received 0.5 (IMI-0.5), 2 (IMI-2) or 8 mg IMI/kg body weight by oral gavage (IMI-8) for three months. The deterioration in sperm motility in IMI-8 group and epidydimal sperm concentration in IMI-2 and IMI-8 groups and abnormality in sperm morphology in IMI-8 were significant. The levels of testosterone (T) and GSH decreased significantly in group IMI-8 compared to the control group. Upon treatment with IMI, apoptotic index increased significantly only in germ cells of the seminiferous tubules of IMI-8 group when compared to control. Fragmentation was striking in the seminal DNA from the IMI-8 group, but it was much less obvious in the IMI-2 one. IMI exposure resulted in elevation of all fatty acids analyzed, but the increases were significant only in stearic, oleic, linoleic and arachidonic acids. The ratios of 20:4/20:3 and 20:4/18:2 were decreased and 16:1n-9/16:0 ratio was increased. In conclusion, the present animal experiments revealed that the treatment with IMI at NOAEL dose-levels caused deterioration in sperm parameters, decreased T level, increased apoptosis of germ cells, seminal DNA fragmentation, the depletion of antioxidants and change in disturbance of fatty acid composition. All these changes indicate the suppression of testicular function. 相似文献
284.
Tatsuya Yoshizaki Yoshihito Shirai Mohd Ali Hassan Azhari Samsu Baharuddin Nik Mustapha Raja Abdullah Alawi Sulaiman Zainuri Busu 《Environment, Development and Sustainability》2012,14(6):1065-1079
This article is a case study to compare the economic viabilities of biogas generation and compost projects in a palm oil mill in Malaysia with and without clean development mechanism (CDM). Biogas is captured from anaerobic ponds or digester tanks treating palm oil mill effluent (POME) and converted to green renewable electricity for grid connection, while compost is produced from the shredded empty fruit bunch and raw untreated POME. The both technologies were compared by considering the changes of the materials flow and energy balances. A palm oil mill with a capacity of 54?t fresh fruit bunch per hour has the potential to produce either 6.9?GWh of electricity from biogas or fertilizer equivalent to 488?t of nitrogen, 76?t of phosphorus and 1,065?t of potassium per year. The economic analysis for 10?years project term analysis indicated that CDM gave a significant impact and ensured economic viability for both projects with 25?% of internal rate of return (IRR), RM 12.39 million of net present value (NPV) and 3.5?years of payback period (PBP) for biogas project, whereas 31?% of IRR, RM 10.87 million of NPV and 2.9?years of PBP for compost project, respectively. In addition, sensitivity analysis indicated that the profitability of both projects will vary depending on the economic situation, such as electricity price which is based on the government policy, whereas compost price that depend on fertilizer market price with 43?% NPV change in 20?% range of fertilizer value. 相似文献
285.
Determination of volatile organic compounds pollution sources in malaysian drinking water using multivariate analysis 总被引:1,自引:0,他引:1
A field investigation was conducted at all water treatment plants throughout 11 states and Federal Territory in Peninsular
Malaysia. The sampling points in this study include treatment plant operation, service reservoir outlet and auxiliary outlet
point at the water pipelines. Analysis was performed by solid phase micro-extraction technique with a 100 μm polydimethylsiloxane
fibre using gas chromatography with mass spectrometry detection to analyse 54 volatile organic compounds (VOCs) of different
chemical families in drinking water. The concentration of VOCs ranged from undetectable to 230.2 μg/l. Among all of the VOCs
species, chloroform has the highest concentration and was detected in all drinking water samples. Average concentrations of
total trihalomethanes (THMs) were almost similar among all states which were in the range of 28.4--33.0 μg/l. Apart from THMs,
other abundant compounds detected were cis and trans-1,2-dichloroethylene, trichloroethylene, 1,2-dibromoethane, benzene, toluene, ethylbenzene, chlorobenzene, 1,4-dichlorobenzene
and 1,2-dichloro - benzene. Principal component analysis (PCA) with the aid of varimax rotation, and parallel factor analysis
(PARAFAC) method were used to statistically verify the correlation between VOCs and the source of pollution. The multivariate
analysis pointed out that the maintenance of auxiliary pipelines in the distribution systems is vital as it can become significant
point source pollution to Malaysian drinking water. 相似文献
286.
Silvia Espín Jovan Andevski Guy Duke Igor Eulaers Pilar Gmez-Ramírez Gunnar Thor Hallgrimsson Bjrn Helander Dorte Herzke Veerle L. B. Jaspers Oliver Krone Rui Loureno Pedro María-Mojica Emma Martínez-Lpez Rafael Mateo Paola Movalli Pablo Snchez-Virosta Richard F. Shore Christian Sonne Nico W. van den Brink Bert van Hattum Al Vrezec Chris Wernham Antonio J. García-Fernndez 《Ambio》2021,50(1):95
Birds of prey, owls and falcons are widely used as sentinel species in raptor biomonitoring programmes. A major current challenge is to facilitate large-scale biomonitoring by coordinating contaminant monitoring activities and by building capacity across countries. This requires sharing, dissemination and adoption of best practices addressed by the Networking Programme Research and Monitoring for and with Raptors in Europe (EURAPMON) and now being advanced by the ongoing international COST Action European Raptor Biomonitoring Facility. The present perspective introduces a schematic sampling protocol for contaminant monitoring in raptors. We provide guidance on sample collection with a view to increasing sampling capacity across countries, ensuring appropriate quality of samples and facilitating harmonization of procedures to maximize the reliability, comparability and interoperability of data. The here presented protocol can be used by professionals and volunteers as a standard guide to ensure harmonised sampling methods for contaminant monitoring in raptors.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01341-9) contains supplementary material, which is available to authorized users. 相似文献
287.
Md. Ekramul Karim Sohana Al Sanjee Shohel Mahmud Modhusudon Shaha Md. Moniruzzaman Keshob Chandra Das 《Chemistry and Ecology》2020,36(1):83-99
ABSTRACTMicroplastics are emerging environmental pollutants that have gained tremendous scientific interest in recent years. These micropollutants are omnipresent both in the terrestrial and aquatic environments posing a deleterious threat to the ecosystem and biodiversity. So, it is important to develop a deep understanding of the environmental fate and potential adverse impacts of microplastics on the aquatic and terrestrial environments. By critically reviewing the previously published scientific literature, the present synthesis briefly outlines the characteristics, occurrence and potential toxic effects of microplastics on terrestrial and aquatic biota. The article also focuses on some innovative approaches for sustainable remediation of macroplastics as well as microplastics. Since the concept of microplastics pollution has yet in its infancy in Bangladesh, this synthesis provides an overview of the current scenario of microplastics pollution and some future research recommendations in the context of Bangladesh which might be helpful to the novice researchers of this field. 相似文献
288.
289.
Aljohny Bassam Oud Almaliki Abdullah Abdulaziz Ali Anwar Yasir Ul-Islam Mazhar Kamal Tahseen 《Journal of Polymers and the Environment》2021,29(10):3252-3262
Journal of Polymers and the Environment - In this research work, a green method of using Saussurea costus extract for the synthesis of silver nanoparticles (AgNPs) is developed. Analysis of the... 相似文献
290.
Bruno Fady Joan Cottrell Lennart Ackzell Ricardo Alía Bart Muys Arantxa Prada Santiago C. González-Martínez 《Regional Environmental Change》2016,16(4):927-939
The conservation and sustainable use of forests in the twenty-first century pose huge challenges for forest management and policy. Society demands that forests provide a wide range of ecosystem services, from timber products, raw materials and renewable energy to sociocultural amenities and habitats for nature conservation. Innovative management and policy approaches need to be developed to meet these often-conflicting demands in a context of environmental change of uncertain magnitude and scale. Genetic diversity is a key component of resilience and adaptability. Overall, forest tree populations are genetically very diverse, conferring them an enormous potential for genetic adaptation via the processes of gene flow and natural selection. Here, we review the main challenges facing our forests in the coming century and focus on how recent progress in genetics can contribute to the development of appropriate practical actions that forest managers and policy makers can adopt to promote forest resilience to climate change. Emerging knowledge will inform and clarify current controversies relating to the choice of appropriate genetic resources for planting, the effect of silvicultural systems and stand tending on adaptive potential and the best ways to harness genetic diversity in breeding and conservation programs. Gaps in our knowledge remain, and we identify where additional information is needed (e.g., the adaptive value of peripheral populations or the genetic determinism of key adaptive traits) and the types of studies that are required to provide this key understanding. 相似文献