全文获取类型
收费全文 | 401篇 |
免费 | 3篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 28篇 |
环保管理 | 31篇 |
综合类 | 37篇 |
基础理论 | 43篇 |
污染及防治 | 165篇 |
评价与监测 | 65篇 |
社会与环境 | 31篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 3篇 |
2022年 | 26篇 |
2021年 | 42篇 |
2020年 | 11篇 |
2019年 | 11篇 |
2018年 | 18篇 |
2017年 | 22篇 |
2016年 | 30篇 |
2015年 | 11篇 |
2014年 | 26篇 |
2013年 | 37篇 |
2012年 | 22篇 |
2011年 | 30篇 |
2010年 | 15篇 |
2009年 | 14篇 |
2008年 | 14篇 |
2007年 | 13篇 |
2006年 | 14篇 |
2005年 | 10篇 |
2004年 | 5篇 |
2003年 | 8篇 |
2002年 | 8篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1990年 | 1篇 |
1983年 | 2篇 |
1981年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有408条查询结果,搜索用时 109 毫秒
71.
Soares Laene Oliveira de Moraes Danielle Rodrigues Hernández-Callejo Luis Boloy Ronney Arismel Mancebo 《Environmental science and pollution research international》2022,29(49):74346-74364
Environmental Science and Pollution Research - This paper discussed the possibility of replacing the internal combustion engine of the series plug-in hybrid electric vehicle (PHEV) powered by... 相似文献
72.
M. Eugenia D’Amato Gordon W. Harkins Tulio de Oliveira Peter R. Teske Mark J. Gibbons 《Marine Biology》2008,155(2):243-247
The genus Nyctiphanes (Malacostraca, Euphausiacea) comprises four neritic species that display antitropical geographic distribution in the Pacific
(N. simplex and N. australis) and Atlantic (N. couchii and N. capensis) Oceans. We studied the origin of this distribution applying methods for phylogenetic reconstruction and molecular dating
of nodes using a Bayesian MCMC analysis and the DNA sequence information contained in mtDNA 16S rDNA and cytochrome oxidase
(COI). We tested hypotheses of vicariance by contrasting the time estimates of cladogenesis with the onset of the major barriers
to ocean circulation. It was estimated that Nyctiphanes originated in the Pacific Ocean during the Miocene, with a lower limit of 18 miilion years ago (Mya). An Atlantic–Pacific
cladogenic event (95% HPD 3.2–9.6) took place after the closure of the Tethyan Sea, suggesting that dispersal occurred from
the Indo-Pacific, most likely via southern Africa. Similarly, the antitropical distribution pattern observed in the eastern
Atlantic Ocean likely resulted from recent Pliocene–Pleistocene (95% HPD 1.0–4.97) northward dispersal from the southern hemisphere.
Our results imply that dispersal appears to have had a significant role to play in the evolution of this group.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
73.
Characterization of Santa Catarina (Brazil) coal with respect to human health and environmental concerns 总被引:1,自引:0,他引:1
Silva LF Oliveira ML da Boit KM Finkelman RB 《Environmental geochemistry and health》2009,31(4):475-485
The current paper presents the concentration, distribution, and modes of occurrence of trace elements of 13 coals from south
Brazil. The samples were collected in the state of Santa Catarina. Chemical analyses and the high ash yields indicate that
all studied coals are rich in mineral matter, with SiO2 and Al2O3 dominating as determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). Quartz is the main mineral
species and is associated with minor levels of feldspars, kaolinite, hematite, and iron-rich carbonates. The contents of trace
elements, including As, Pb, Cd, Ni, Cr, Mn, Be, V, U, Zn, Li, Cu, Tl, and Ni, in coals were determined. A comparison of ranges
and means of elemental concentrations in Santa Catarina, Brazil, and world coals shows that the ranges of most elements in
Santa Catarina coal are very close to the usual worldwide concentration ranges in coal. 相似文献
74.
Collection and recycling of electronic scrap: a worldwide overview and comparison with the Brazilian situation 总被引:1,自引:0,他引:1
Recycling and the related issue of sustainable development are increasing in importance around the world. In Brazil, the new National Policy on Solid Wastes has prompted discussion on the future of electronic waste (e-waste). Over the last 10 years, different e-waste collection systems and recycling processes have been applied globally. This paper presents the systems used in different countries and compares the world situation to the current Brazilian reality. To establish a recycling process, it is necessary to organize efficient collection management. The main difficulty associated with the implementation of e-waste recycling processes in Brazil is the collection system, as its efficiency depends not only on the education and cooperation of the people but also on cooperation among industrial waste generators, distributors and the government. Over half a million waste pickers have been reported in Brazil and they are responsible for the success of metal scrap collection in the country. The country also has close to 2400 companies and cooperatives involved in recycling and scrap trading. On the other hand, the collection and recycling of e-waste is still incipient because e-wastes are not seen as valuable in the informal sector. The Brazilian challenge is therefore to organize a system of e-waste management including the informal sector without neglecting environmentally sound management principles. 相似文献
75.
Innovation for sustainable development in artisanal mining: Advances in a cluster of opal mining in Brazil 总被引:1,自引:0,他引:1
The objective of this article is to understand how the promotion of clusters of small economic agents in the gem sector has brought some improvements in the economic, social and environmental conditions in the mining sector and activities related to it. The research provides policy and theoretical contributions to the field of gem production, as well as enhances understanding of the under researched opal production in Brazil. It argues that government funding and technical support dedicated to the development of mining clusters, i.e. working with small economic agents as a whole and not individually, could promote not only more economic development, but also effectively incorporate social and environmental issues, such as workers safety, water management and tailings recycling. The argument is based on an evaluation of environmental, economic, social and institutional aspects of the opal mining cluster in Pedro II municipality, Piauí state. The results suggest that some formalisation of existing practices and adequate policies have triggered innovation with some positive effects on the performance of artisanal mining. Nevertheless, there are indications that if decision-makers plan to make this cluster more sustainable, they will have to include other issues in the debate including developing substituting economic activities. 相似文献
76.
Carolina Oliveira de Santana Taíse Bomfim de Jesus William Moura de Aguiar Washington de Jesus Sant’anna Franca-Rocha Carlos Alberto Caroso Soares 《Environmental monitoring and assessment》2017,189(3):123
In this study, an analysis was performed on the concentrations of the trace elements Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, V, and Zn in muscle of two carnivorous and one planktivorous fish species collected at Todos os Santos Bay (BTS). The accumulation order of the trace elements in Lutjanus analis was Al >Zn >Fe >Cr >Ba >Ni. In Cetengraulis edentulus, the order was Al >Fe >Zn >Cr >Ni >Mn >As. In the species Diapterus rhombeus, the order was Al >Fe >Zn >Cr >Ni >Mn >Cd. To determine the risk related to the consumption of fish, toxicity guidelines were used as standard references. It was observed that the species C. edentulus contained concentrations of As exceeding WHO limits, but these concentrations were acceptable according to the Agência Nacional de Vigilância Sanitária (ANVISA) guidelines. Cd levels were found only in D. rhombeus and in low concentrations according to the determinations of WHO and ANVISA. Pb levels were not detected in any of the three fish species. The analyzed elements did not differ statistically according to the species and feeding habits. The results point to possible risks of human contamination by As related to the consumption of the fish species C. edentulus from the BTS. 相似文献
77.
Fagliari JR de Oliveira RS Constantin J 《Journal of environmental science and health. Part. B》2005,40(1):201-206
Tomato is considered one of the most sensitive crops regarding 2,4-D drift. In many cases, such susceptibility has led to important restrictions in the use of 2,4-D based products. Field experiments were carried out for two consecutive years in tomato, by applying sublethal doses of 2,4-D (ranging from 0.42 to 13.44 g a.i. ha(-1)) directly to plants, at different stages of growth, as a simulation of eventual drifts to the crop. The range of rates was based on the assumption of a 0.0625-2.0% drift level of a 1 L ha(-1) of the most common formulated herbicides. For this crop, the range of rates between 0.42 and 13.44 g a.i ha(-1) applied at the beginning of flowering caused a linear crop reduction. On the other hand, rates < or = 13.44 g a.i. ha(-1) applied after full development of fourth truss stage or latter had no effect on crop yield or development. For tomato, tolerance to 2,4-D strongly increases with plant age. 相似文献
78.
Allelopathic potential and systematic evaluation of organic extracts from Canavalia ensiformis leaves (Jack beans) 总被引:1,自引:0,他引:1
Santos S de Moraes Mde L da Silva Souza Filho AP Rezende MO 《Journal of environmental science and health. Part. B》2005,40(1):77-84
This article describes the assessment of possible allelopathic potential of organic extracts obtained from leaves of Canavalia ensiformis under laboratory conditions. Furthermore, a systematic evaluation of these extracts was carried out using specific protocols developed in capillary electrophoresis (CE) to determine some groups of secondary metabolites. After the identification and quantification of compounds, the effects of compounds on germination of some common weeds was investigated, which are becoming a real problem in pastures in the state of Pará, Brazil. 相似文献
79.
Malato S Blanco J Vidal A Fernández P Cáceres J Trincado P Oliveira JC Vincent M 《Chemosphere》2002,47(3):235-240
A European industrial consortium called SOLARDETOX has been created as the result of an EC-DGXII BRITE-EURAM-III-financed project on solar photocatalytic detoxification of water. The project objective was to develop a simple, efficient and commercially competitive water-treatment technology, based on compound parabolic collectors (CPCs) solar collectors and TiO2 photocatalysis, to make possible easy design and installation. The design, set-up and preliminary results of the main project deliverable, the first European industrial solar detoxification treatment plant, is presented. This plant has been designed for the batch treatment of 2 m3 of water with a 100 m2 collector-aperture area and aqueous aerated suspensions of polycrystalline TiO2 irradiated by sunlight. Fully automatic control reduces operation and maintenance manpower. Plant behaviour has been compared (using dichloroacetic acid and cyanide at 50 mg l(-1) initial concentration as model compounds) with the small CPC pilot plants installed at the Plataforma Solar de Almería several years ago. The first results with high-content cyanide (1 g l(-1)) waste water are presented and plant treatment capacity is calculated. 相似文献
80.
An evaluation of olive-tree bark for the biological monitoring of airborne trace-elements at ground level 总被引:1,自引:0,他引:1
Pacheco AM Barros LI Freitas MC Reis MA Hipólito C Oliveira OR 《Environmental pollution (Barking, Essex : 1987)》2002,120(1):79-86
There is a need to start looking into the possibility of tree bark for biomonitoring. Bark from olive trees (Olea europaea Linn.) has been collected over an area in northwestern Portugal, featuring a blend of rural lands, industrial towns and coastal environments. Samples were analysed through INAA and PIXE for their elemental contents. Results from both techniques were reconciled and then compared with an extensive database on 46 trace elements in Parmelia spp. thalli from the same sites and mostly from the very bark substrates. Distribution-free, nonparametric statistics show that, despite signal magnitude, variation patterns of bark and lichen concentrations follow one another in a most significant way. Selected elements in bark also correlate to a superior extent. As far as this investigation goes, there is no reason whatsoever for discarding bark as an alternative to lower epiphytes. 相似文献