全文获取类型
收费全文 | 200篇 |
免费 | 3篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 11篇 |
废物处理 | 4篇 |
环保管理 | 27篇 |
综合类 | 47篇 |
基础理论 | 29篇 |
污染及防治 | 68篇 |
评价与监测 | 13篇 |
社会与环境 | 9篇 |
出版年
2023年 | 4篇 |
2022年 | 2篇 |
2021年 | 5篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 10篇 |
2016年 | 17篇 |
2015年 | 2篇 |
2014年 | 6篇 |
2013年 | 17篇 |
2012年 | 12篇 |
2011年 | 18篇 |
2010年 | 8篇 |
2009年 | 11篇 |
2008年 | 9篇 |
2007年 | 9篇 |
2006年 | 11篇 |
2005年 | 4篇 |
2004年 | 5篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 3篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1976年 | 5篇 |
1975年 | 1篇 |
1974年 | 5篇 |
1973年 | 3篇 |
1966年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有208条查询结果,搜索用时 0 毫秒
201.
202.
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
203.
204.
Attempts by researchers and policy-makers to address the ‘wicked’ issues which pervade environmental policy usually revolve around attempting – or recommending – both more participatory and transparent, and more systematic and evidence-based, policy-making. Post-normal science (PNS), with its ‘extended peer community’, has emerged as one approach, whilst others focus on procedural reforms of the policy process, particularly on enhancing democratic decision-making. This paper applies a novel analytical framework to a primarily documentary analysis of three cases we argue are wicked—Canadian regulatory review of health products and food, European union (EU) environmental thematic strategies, and United Kingdom (UK) energy and climate change policy. It explores how various responses to wicked issues are implemented, through the ‘lenses’ of PNS and, more generally, ‘democratic and effective decision-making’. It finds such responses are often limited by practical and fundamental barriers relating to handling of uncertainty, issue framing, participation, power, politics, and attitude to evidence. We draw conclusions about future research on PNS, particularly the need to more clearly relate theory to different strands of literature on the evidence–policy-making relationship, and to continue empirical testing. 相似文献
205.
Combining material characterization with single and multi-oxyanion
adsorption for mechanistic study of chromate removal by cationic hydrogel 总被引:1,自引:1,他引:0
Cationic hydrogel with magnetic property was synthesized via radical polymerization and its removal capacity of chromate from
contaminated water was found to be 200 mg/g. Using Fourier transform infrared spectroscopy (FT-IR) study, the mechanism of
chromate removal by hydrogel was found to be non-specific adsorption, mainly due to ion exchange, as evidenced by the positively
charged functional group, trimethyl ammonium –N+(CH3)3; in the monomer. Verifications were accordingly determined by testing
different oxyanion adsorption onto the hydrogel. The results of the chromate adsorption experiments illustrated that the amount
of chromate adsorbed was nearly equal to that of the chloride released from the hydrogel, which is part of the evidence for ion
exchange. Single and multi-oxyanion adsorption experiments were also performed, and it was demonstrated that ion removal was
species independent, but charge dependent, another characteristic of the ion exchange process. It was found that the same Langmuir
model can be applied to best fit the findings of single and multi-oxyanion adsorption, which further indicates the mechanism of chromate
removal is attributed to ion exchange. In view of the above, the background anions compete for adsorption sites with chromate,
evidenced by inhibitive chromate removal in the presence of background electrolytes in the batch studies, further echoing the ion
exchange mechanism. 相似文献
206.
Müller Irene Althof Nadine Hoffmann Bernd Klaus Christine Schilling-Loeffler Katja Falkenhagen Alexander Johne Reimar 《Food and environmental virology》2023,15(1):32-42
Food and Environmental Virology - Infection with the tick-borne encephalitis virus (TBEV) can cause meningitis, meningoencephalitis and myelitis in humans. TBEV is an enveloped RNA virus of the... 相似文献
207.
Preparation of cross-linked magnetic chitosan with quaternary ammonium and its application for Cr(VI) and P(V) removal 总被引:2,自引:0,他引:2
Pollutants that exist in anionic species are issues of concern in water treatment. Compared to cationic pollutants, the removal of anionic pollutants by adsorption is more difficult because most adsorbents carry predominantly negative charges in neutral and alkaline environments. In this study, a cross-linked chitosan derivative with quaternary ammonium and magnetic properties(QM-chitosan) was prepared and employed to remove chromium(VI) and phosphorus(V)(Cr(VI) and P(V)) from aqueous environments. The QM-chitosan was characterized by Fourier transform infrared spectrometry(FT-IR),thermogravimetric analysis(TGA), energy dispersive X-ray(SEM-EDX) and zeta potential.Batch experiments show that QM-chitosan can effectively remove Cr(VI) and P(V), and the main mechanism was believed to be electrostatic interaction. A pseudosecond-order model was fitted to describe the kinetic processes of Cr(VI) and P(V) removal. The adsorption isotherms of both Cr(VI) and P(V) on the QM-chitosan were well fitted by the Langmuir isotherm equation. The saturated adsorption capacity of P(V)(2.783 mmol/g) was found to be higher than that of Cr(VI)(2.323 mmol/g), resulting from the size of the H2PO-4ions being smaller than that of the HCr O-4ions. However, the theoretical calculation and experimental results showed that QM-chitosan had a stronger affinity for Cr(VI) than P(V). The adsorption–desorption of the QM-chitosan was evaluated, and high regeneration rates were demonstrated. 相似文献
208.
Basu NB Rao PS Poyer IC Annable MD Hatfield K 《Journal of contaminant hydrology》2006,86(1-2):105-127
Groundwater and contaminant fluxes were measured, using the passive flux meter (PFM) technique, in wells along a longitudinal transect passing approximately through the centerline of a trichloroethylene (TCE) plume at a former manufacturing plant located in the Midwestern US. Two distinct zones of hydraulic conductivity were identified from the measured groundwater fluxes; a 6-m-thick upper zone ( approximately 7 m to 13 m below the ground surface or bgs) with a geometric mean Darcy flux (q(0)) of 2 cm/day, and a lower zone ( approximately 13 m to 16.5m bgs) with a q(0) approximately 15 cm/day; this important hydrogeologic feature significantly impacts any remediation technology used at the site. The flux-averaged TCE concentrations estimated from the PFM results compared well with existing groundwater monitoring data. It was estimated that at least 800 kg of TCE was present in the source zone. The TCE mass discharge across the source control plane (85 m x 38 m) was used to estimate the "source strength" ( approximately 365 g/day), while mass discharges across multiple down-gradient control planes were used to estimate the plume-averaged, TCE degradation rate constant (0.52 year(-1)). This is close to the rate estimated using the conventional centerline approach (0.78 year(-1)). The mass discharge approach provides a more robust and representative estimate than the centerline approach since the latter uses only data from wells along the plume centerline while the former uses all wells in the plume. 相似文献