全文获取类型
收费全文 | 2035篇 |
免费 | 20篇 |
国内免费 | 45篇 |
专业分类
安全科学 | 26篇 |
废物处理 | 137篇 |
环保管理 | 204篇 |
综合类 | 165篇 |
基础理论 | 400篇 |
环境理论 | 2篇 |
污染及防治 | 656篇 |
评价与监测 | 381篇 |
社会与环境 | 124篇 |
灾害及防治 | 5篇 |
出版年
2023年 | 69篇 |
2022年 | 199篇 |
2021年 | 131篇 |
2020年 | 33篇 |
2019年 | 55篇 |
2018年 | 96篇 |
2017年 | 96篇 |
2016年 | 127篇 |
2015年 | 54篇 |
2014年 | 103篇 |
2013年 | 220篇 |
2012年 | 95篇 |
2011年 | 107篇 |
2010年 | 96篇 |
2009年 | 80篇 |
2008年 | 100篇 |
2007年 | 73篇 |
2006年 | 82篇 |
2005年 | 47篇 |
2004年 | 31篇 |
2003年 | 31篇 |
2002年 | 40篇 |
2001年 | 15篇 |
2000年 | 9篇 |
1999年 | 7篇 |
1998年 | 6篇 |
1997年 | 3篇 |
1996年 | 8篇 |
1995年 | 4篇 |
1994年 | 8篇 |
1993年 | 3篇 |
1992年 | 6篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1974年 | 2篇 |
1969年 | 2篇 |
1966年 | 2篇 |
1965年 | 2篇 |
1964年 | 3篇 |
1962年 | 2篇 |
1961年 | 6篇 |
1958年 | 4篇 |
1957年 | 3篇 |
1956年 | 2篇 |
1955年 | 4篇 |
排序方式: 共有2100条查询结果,搜索用时 468 毫秒
41.
Adelodun Bashir Ajibade Fidelis Odedishemi Ibrahim Rahmat Gbemisola Ighalo Joshua O. Bakare Hashim Olalekan Kumar Pankaj Eid Ebrahem M. Kumar Vinod Odey Golden Choi Kyung-Sook 《Journal of Material Cycles and Waste Management》2021,23(6):2077-2086
Journal of Material Cycles and Waste Management - The recent emergence of the COVID-19 pandemic has contributed to the drastic production and use of healthcare and personal protective equipment,... 相似文献
42.
Gaun Sachin Ali Syed Afroz Singh Pooja Patwa Jayant Flora Swaran Jeet Singh Datusalia Ashok Kumar 《Environmental science and pollution research international》2023,30(10):24949-24962
Environmental Science and Pollution Research - Copper (Cu) is an important trace element required for several biological processes. The use of copper is increasing gradually in several... 相似文献
43.
Pradeep Jain Jae Hac Ko Dinesh Kumar Jon Powell Hwidong Kim Lizmarie Maldonado Timothy Townsend Debra R. Reinhart 《Waste management (New York, N.Y.)》2014,34(11):2312-2320
A case study of landfill liquids addition using small diameter (5 cm) vertical wells is reported. More than 25,000 m3 of leachate was added via 134 vertical wells installed 3 m, 12 m, and 18 m deep over five years in a landfill in Florida, US. Liquids addition performance (flow rate per unit screen length per unit liquid head) ranged from 5.6 × 10?8 to 3.6 × 10?6 m3 s?1 per m screen length per m liquid head. The estimated radial hydraulic conductivity ranged from 3.5 × 10?6 to 4.2 × 10?4 m s?1. The extent of lateral moisture movement ranged from 8 to 10 m based on the responses of moisture sensors installed around vertical well clusters, and surface seeps were found to limit the achievable liquids addition rates, despite the use of concrete collars under a pressurized liquids addition scenario. The average moisture content before (51 samples) and after (272 samples) the recirculation experiments were 23% (wet weight basis) and 45% (wet weight basis), respectively, and biochemical methane potential measurements of excavated waste indicated significant (p < 0.025) decomposition. 相似文献
44.
K.R. Renjith V. Sudheesh Anu Shaji Ejin George Manju Mary Joseph C.S. Ratheesh Kumar 《毒物与环境化学》2016,98(1):36-52
The spatial and temporal variations of some trace metals in the surface sediments of Cochin Estuary were analyzed along with their geochemical associations to identify the possible sources, bioavailability and the health risks posed by them. The dominance of kaolinite and suggested that clay minerals distribution is influenced by sediment sorting. Total metal analysis revealed enrichment for Cd, Pb and Zn due to anthropogenic activities. The speciation analysis established that notwithstanding the large availability, carbonate as well as organic and sulfides bound fractions showed negligible associations with most of the metals. Hydrous Fe–Mn oxides appeared to play a major role in controlling the fate and transport of these metals in the sediments of Cochin Estuary. Lower contribution of the residual fractions for Cd (21%–26%), Pb (<60%) and Zn (24%–42%) indicated an obvious increase of other geochemical fractions. Risk assessment analysis revealed that regardless of total concentration, none of the analyzed metals were at safe levels in the estuary as appreciable percentages were found to be associated with mobile geochemical forms. The speciation study conspicuously established that the metals originating from non-geogenic sources are largely associated with the labile fractions and hence are more detrimental to the aquatic biota. 相似文献
45.
Jeremy R. Brammer Nicolas D. Brunet A. Cole Burton Alain Cuerrier Finn Danielsen Kanwaljeet Dewan Thora Martina Herrmann Micha V. Jackson Rod Kennett Guillaume Larocque Monica Mulrennan Arun Kumar Pratihast Marie Saint‐Arnaud Colin Scott Murray M. Humphries 《Conservation biology》2016,30(6):1277-1287
Many argue that monitoring conducted exclusively by scientists is insufficient to address ongoing environmental challenges. One solution entails the use of mobile digital devices in participatory monitoring (PM) programs. But how digital data entry affects programs with varying levels of stakeholder participation, from nonscientists collecting field data to nonscientists administering every step of a monitoring program, remains unclear. We reviewed the successes, in terms of management interventions and sustainability, of 107 monitoring programs described in the literature (hereafter programs) and compared these with case studies from our PM experiences in Australia, Canada, Ethiopia, Ghana, Greenland, and Vietnam (hereafter cases). Our literature review showed that participatory programs were less likely to use digital devices, and 2 of our 3 more participatory cases were also slow to adopt digital data entry. Programs that were participatory and used digital devices were more likely to report management actions, which was consistent with cases in Ethiopia, Greenland, and Australia. Programs engaging volunteers were more frequently reported as ongoing, but those involving digital data entry were less often sustained when data collectors were volunteers. For the Vietnamese and Canadian cases, sustainability was undermined by a mismatch in stakeholder objectives. In the Ghanaian case, complex field protocols diminished monitoring sustainability. Innovative technologies attract interest, but the foundation of effective participatory adaptive monitoring depends more on collaboratively defined questions, objectives, conceptual models, and monitoring approaches. When this foundation is built through effective partnerships, digital data entry can enable the collection of more data of higher quality. Without this foundation, or when implemented ineffectively or unnecessarily, digital data entry can be an additional expense that distracts from core monitoring objectives and undermines project sustainability. The appropriate role of digital data entry in PM likely depends more on the context in which it is used and less on the technology itself. 相似文献
46.
Pushpendra Koli Braj B. Singh Jitendra Kumar Deeba Kamil 《Journal of environmental science and health. Part. B》2013,48(9):674-681
Controlled release nanoformulations of carbendazim (Methyl 1H-benzimidazol-2-ylcarbamate), a systemic fungicide, have been prepared using laboratory synthesized poly(ethylene glycols) (PEGs)-based functionalized amphiphilic copolymers. The release kinetics of carbendazim from developed controlled release (CR) formulations was studied and compared with that of the commercially available 50% Wettable Powder (WP). Further, the bioefficacy evaluation of developed formulations was done against plant pathogenic fungi Rhizoctonia solani by the poison food technique method. The release of maximum amount of carbendazim from developed formulations was dependent on the molecular weight of PEGs and was found to increase with increasing molecular weights. The range of carbendazim release was found to be between 10th to 35th day as compared to commercial formulation which was up to 7th day. The diffusion exponent (n value) of carbendazim in water ranged from 0.37 to 0.52 in the tested formulations. The half-release (t1/2) values ranged between 9.47 and 24.20 days, and the period of optimum availability (POA) of carbendazim ranged from 9.15 to 26.63 days. Also, ED50 values of the developed formulations vary from 0.40 to 0.74 mg L?1. These formulations can be used to optimize the release of carbendazim to achieve disease control for the desired period depending on the matrix of the polymer used. 相似文献
47.
48.
Sharma Krishna Venkatarama Sarvalingam Barath Kumar Marigoudar Shambanagouda Rudragouda 《Environmental science and pollution research international》2021,28(2):1304-1316
Environmental Science and Pollution Research - Mesocosms are real-world environmental science tools for bridging the gap between laboratory-scale experiments and actual habitat studies on ecosystem... 相似文献
49.
Suneel V. Sathish Kumar S. Balaji R. Vethamony P. 《Environmental science and pollution research international》2021,28(14):17181-17199
Environmental Science and Pollution Research - Formation of oil-suspended sediment aggregates (OSAs) is believed to be one of the natural cleaning processes in the marine environment. In this... 相似文献
50.
Kaushik Lav Kumar Mahalingam Arun Kumar Palanisamy Muthukumar 《Environmental science and pollution research international》2021,28(10):12168-12177
Environmental Science and Pollution Research - In this paper, the combustion characteristics of biogas in a Porous Radiant Burner (PRBBG) designed for domestic cooking appliances are presented.... 相似文献