全文获取类型
收费全文 | 4303篇 |
免费 | 37篇 |
国内免费 | 27篇 |
专业分类
安全科学 | 88篇 |
废物处理 | 268篇 |
环保管理 | 366篇 |
综合类 | 515篇 |
基础理论 | 858篇 |
环境理论 | 6篇 |
污染及防治 | 1580篇 |
评价与监测 | 394篇 |
社会与环境 | 277篇 |
灾害及防治 | 15篇 |
出版年
2023年 | 54篇 |
2022年 | 111篇 |
2021年 | 166篇 |
2020年 | 75篇 |
2019年 | 71篇 |
2018年 | 154篇 |
2017年 | 166篇 |
2016年 | 237篇 |
2015年 | 129篇 |
2014年 | 252篇 |
2013年 | 414篇 |
2012年 | 292篇 |
2011年 | 315篇 |
2010年 | 241篇 |
2009年 | 161篇 |
2008年 | 253篇 |
2007年 | 267篇 |
2006年 | 201篇 |
2005年 | 170篇 |
2004年 | 124篇 |
2003年 | 108篇 |
2002年 | 96篇 |
2001年 | 53篇 |
2000年 | 41篇 |
1999年 | 24篇 |
1998年 | 18篇 |
1997年 | 13篇 |
1996年 | 13篇 |
1995年 | 19篇 |
1994年 | 14篇 |
1993年 | 8篇 |
1992年 | 8篇 |
1991年 | 5篇 |
1990年 | 8篇 |
1989年 | 3篇 |
1988年 | 5篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1970年 | 2篇 |
1967年 | 4篇 |
1966年 | 4篇 |
1965年 | 2篇 |
1964年 | 5篇 |
1962年 | 3篇 |
1959年 | 4篇 |
1958年 | 15篇 |
1957年 | 5篇 |
1955年 | 2篇 |
排序方式: 共有4367条查询结果,搜索用时 687 毫秒
701.
Susana García-Alonso Rosa María Pérez-Pastor María Luisa Sevillano-Castaño 《Environmental science and pollution research international》1999,6(3):147-150
The focus of this study was to characterize the concentration levels of selected PCBs and compare them to compiled data in
order to contribute to the international database. The sampling site is located in the outskirts of Madrid and can be considered
an open urban area. 32 samples of air were taken from February 1998 to June 1998 by using a high volume air sampler. Glass
fiber filters and polyurethane foam (PUF) were used to collect the paniculate and gas phase material, respectively.
PUF plugs were Soxhlet extracted and filters were ultrasonically extracted by using pesticide-grade hexane and dichloromethane,
respectively. The cleanup procedure was carried out on a florisil column with hexane and hexane/dichloromethane as elution
solvents.
GC/MS in a selected ion monitoring mode was used for quantification and 29 selected PCBs congeners were analyzed. 相似文献
702.
Spatial Relationships of Levees and Wetland Systems within Floodplains of the Wabash Basin,USA
下载免费PDF全文
![点击此处可从《Journal of the American Water Resources Association》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Ryan R. Morrison Erin Bray Fernando Nardi Antonio Annis Quan Dong 《Journal of the American Water Resources Association》2018,54(4):934-948
Given the unique biogeochemical, physical, and hydrologic services provided by floodplain wetlands, proper management of river systems should include an understanding of how floodplain modifications influence wetland ecosystems. The construction of levees can reduce river–floodplain connectivity, yet it is unclear how levees affect wetlands within floodplains, let alone the cumulative impacts within an entire watershed. This paper explores spatial relationships between levee and floodplain wetland systems in the Wabash Basin, United States. We used a hydrogeomorphic floodplain delineation technique to map floodplain extents and identify wetlands that may be hydrologically connected to river networks. We then spatially examined the relationship between levee presence, wetland area, and other river network attributes within discrete subbasins. Our results show that cumulative wetland area is relatively constant in subbasins that contain levees, regardless of maximum stream order within the subbasin. In subbasins that do not contain levees, cumulative wetland area increases with maximum stream order. However, we found that wetland distributions around levees can be complex, and further studies on the influence of levees on wetland habitat may need to consider finer resolution spatial scales. 相似文献
703.
Pironti Concetta Ricciardi Maria Motta Oriana Venier Marta Faggiano Antonio Cucciniello Raffaele Proto Antonio 《Environmental science and pollution research international》2023,30(2):3112-3120
Environmental Science and Pollution Research - Thermo-mineral springs are widely spread over the volcanic areas of Salerno, a city in southern Italy. Although the water of thermal structures... 相似文献
704.
Rolim Silvia Beatriz Alves Veettil Bijeesh Kozhikkodan Vieiro Antonio Pedro Kessler Anita Baldissera Gonzatti Clóvis 《Environmental science and pollution research international》2023,30(8):19602-19616
Environmental Science and Pollution Research - A large number of freshwater lakes around the world show recurring harmful algal blooms, particularly cyanobacterial blooms, that affect public health... 相似文献
705.
Artisanal and small-scale gold mining (ASGM) is the principal anthropogenic activity that globally contributes to overloading our environment with mercury. Although the Minamata Convention, led by the United Nations, is a crucial instrument to eliminate its use progressively, novel approaches to accelerate this difficult transition are welcome. This article proposes a framework for policy-making or improvement, fostering the enforcement of mercury elimination through the lens of the 17 Sustainable Development Goals (SDGs), focusing on the excluded artisanal and small-scale gold miners and their dependents. We move forward with a literature review of the Artisanal and Small Mining topic, taking each SDG as a unit of analysis. Understanding the problem as a puzzle of four sets of pieces, namely: (1) social, (2) environmental, (3) economic, and (4) institutional, the paper offers potential opportunities for the decision-makers and practitioners to accelerate the substitution of this heavy metal and develop sustainable futures for the ASGM communities. We conclude by proposing a pragmatic framework that synthesizes the means, actions, and ends to accelerate a sustainable transition. 相似文献
706.
Andráš Peter Dadová Jana Romančík Roman Borošová Daniela Midula Pavol Dirner Vojtech 《Environmental geochemistry and health》2021,43(9):3675-3681
Environmental Geochemistry and Health - The abandoned Malachov deposit belongs among the most important historic Hg deposits in the world. The soil, groundwater, surface water, plants, and animals... 相似文献
707.
Joana Garrido Nogueira Ronaldo Sousa Hassan Benaissa Geert De Knijf Sónia Ferreira Mohamed Ghamizi Duarte V. Gonçalves Richard Lansdown Catherine Numa Vincent Prié Nicoletta Riccardi Mary Seddon Maria Urbańska Alice Valentini Ilya Vikhrev Simone Varandas Amílcar Teixeira Manuel Lopes-Lima 《Conservation biology》2021,35(5):1367-1379
Theidentification of key biodiversity areas (KBA) was initiated by the International Union for Conservation of Nature in 2004 to overcome taxonomic biases in the selection of important areas for conservation, including freshwater ecosystems. Since then, several KBAs have been identified mainly based on the presence of trigger species (i.e., species that trigger either the vulnerability and or the irreplaceability criterion and thus identify a site as a KBA). However, to our knowledge, many of these KBAs have not been validated. Therefore, classical surveys of the taxa used to identify freshwater KBAs (fishes, molluscs, odonates, and aquatic plants) were conducted in Douro (Iberian Peninsula) and Sebou (Morocco) River basins in the Mediterranean Biodiversity Hotspot. Environmental DNA analyses were undertaken in the Moroccan KBAs. There was a mismatch between the supposed and actual presence of trigger species. None of the trigger species were found in 43% and 50% of all KBAs surveyed in the Douro and Sebou basins, respectively. Shortcomings of freshwater KBA identification relate to flawed or lack of distribution data for trigger species. This situation results from a misleading initial identification of KBAs based on poor (or even inaccurate) ecological information or due to increased human disturbance between initial KBA identification and the present. To improve identification of future freshwater KBAs, we suggest selecting trigger species with a more conservative approach; use of local expert knowledge and digital data (to assess habitat quality, species distribution, and potential threats); consideration of the subcatchment when delineating KBAs boundaries; thoughtful consideration of terrestrial special areas for conservation limits; and periodic field validation. 相似文献
708.
Salas-Zapata Walter Posada-Castaño Anny Mejía-Durango Diana 《The Environmentalist》2021,41(4):487-500
Environment Systems and Decisions - Natural resources are a type of good whose individual utility maximization is not desirable, as it could lead to their depletion. This problem, raised several... 相似文献
709.
710.