全文获取类型
收费全文 | 170篇 |
免费 | 0篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 14篇 |
环保管理 | 12篇 |
综合类 | 16篇 |
基础理论 | 24篇 |
污染及防治 | 54篇 |
评价与监测 | 32篇 |
社会与环境 | 16篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 2篇 |
2022年 | 9篇 |
2021年 | 8篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 11篇 |
2017年 | 9篇 |
2016年 | 7篇 |
2015年 | 8篇 |
2014年 | 11篇 |
2013年 | 12篇 |
2012年 | 8篇 |
2011年 | 13篇 |
2010年 | 11篇 |
2009年 | 11篇 |
2008年 | 11篇 |
2007年 | 10篇 |
2006年 | 8篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 3篇 |
2002年 | 1篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1989年 | 1篇 |
排序方式: 共有173条查询结果,搜索用时 78 毫秒
101.
Clístenes Williams Araújo do Nascimento Luiz Henrique Vieira Lima Franklone Lima da Silva Caroline Miranda Biondi Milton César Costa Campos 《Environmental monitoring and assessment》2018,190(10):606
The soils of the Brazilian Amazon exhibit large geochemical diversity reflecting the different soil formation processes in an area covering 49% of the Brazilian territory. Soil contamination by heavy metals is one of the threats to the sustainability of this Biome but establishing quality reference values (QRVs) for the region is a challenging owing to the immense territorial area of the Amazon. This study aimed to determine the natural background of heavy metals in soils from the southwestern Brazilian Amazon in order to propose QRVs for Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Sb, and Zn for alluvial sedimentary soils. One hundred and twenty-eight soil samples were collected at a depth of 0.0–0.2 m in sites with minimal anthropogenic interference. Soil sample digestion was based on the EPA 3051A method and metal concentrations were determined by ICP-OES. QRVs calculated for the southwestern Brazilian Amazon are among the lowest recorded in Brazil (mg kg?1): Ba (16.5), Cd (0.1), Cr (6.9), Cu (2.8), Fe (15.4), Mn (13.4), Ni (1.7), Pb (4.4), Sb (0.9), and Zn (5.7). The low metal concentration is likely a result of the sedimentary origin of the soils. The results of this study can serve as a basis for defining public policies to investigate the environmental impacts resulting from changes in land use in areas of the Brazilian Amazon. 相似文献
102.
Francisco Luiza Flavia Veiga do Amaral Crispim Bruno Spósito Juliana Caroline Vivian Solórzano Julio César Jut Maran Nayara Halimy Kummrow Fábio do Nascimento Valter Aragão Montagner Cassiana Carolina De Oliveira Kelly Mari Pires Barufatti Alexeia 《Environmental science and pollution research international》2019,26(24):24581-24594
Environmental Science and Pollution Research - Groundwaters are normally consumed without previous treatment and therefore the monitoring of contaminants in order to guarantee its safety is... 相似文献
103.
Ulysses Paulino de Albuquerque Luciana Gomes de Sousa Nascimento Fabio José Vieira Cybelle Maria de Albuquerque Duarte Almeida Marcelo Alves Ramos Ana Carolina Oliveira da Silva 《Journal of Agricultural and Environmental Ethics》2012,25(1):19-32
The scientific community has debated the importance of “return” activities after ethnobiological studies. This issue has provoked
debate because it touches on the ethics of research and the relationships with the people involved in these studies. This
case study aimed to investigate community perception of an ethnobotany research project that was carried out in the semi-arid
region of northeastern Brazil. Furthermore, we reported how the residents of this rural community felt about participating
in the activities of “return” that arose from the projects. Our findings demonstrate that “return” activities should be planned
from the design phase of the research until its closure as a lifelong process that allows the communities involved to gradually
take ownership of the information and actions that are being generated. Similarly, we argue that such activities must be negotiated
with the people of the community so that they have decision-making power and autonomy to decide what is most relevant to their
lives. 相似文献
104.
Nascimento SF Kurzweil H Wruss W Fenzl N 《Environmental pollution (Barking, Essex : 1987)》2006,140(1):29-42
Extremely high total cadmium concentrations (average about 500 mg/kg) together with very small (average of 1.1 microg/l) dissolved available cadmium have been found in the more acidic deeper layers of the bottom sediments of the Brazilian Amazonian Guajará Estuary. The paper shows that climatic changes and the periodic input of the Atlantic waters into the Estuary appear to have no direct influence on annual average total cadmium concentration, but they affect accumulation, distribution and remobilization of cadmium in different ways during the rainy season (February/March) and the dry season (November/December). Even if only a very small part of the total Cd is available, the concentrations of dissolved Cd in the Estuary are still high enough to cause environmental concern, if compared with concentrations in natural freshwater ecosystems. 相似文献
105.
Davi Gasparini Fernandes Cunha Maria do Carmo Calijuri Walter Kennedy Dodds 《Environmental monitoring and assessment》2014,186(2):1143-1155
Reservoirs are artificial ecosystems with physical, chemical, and biological transitional characteristics between rivers and lakes. Greater water retention time in reservoirs provides conditions for cycling materials inputs from upstream waters through sedimentation, biological assimilation and other biogeochemical processes. We investigated the effects of reservoirs on the water quantity and quality in the Great Plains (Kansas, USA), an area where little is known about these dominant hydrologic features. We analyzed a 30-year time-series of discharge, total phosphorus (TP), nitrate (NO3 ?), and total suspended solids (TSS) from six reservoirs and estimated overall removal efficiencies from upstream to downstream, testing correlations among retention, discharge, and time. In general, mean removal of TP (42–74 %), TSS (0–93 %), and NO3 ? (11–56 %) from upstream to downstream did not change over 30 years. TP retention was associated with TSS removal, suggesting that nutrient substantial portion of P was adsorbed to solids. Our results indicated that reservoirs had the effect of lowering variance in the water quality parameters and that these reservoirs are not getting more or less nutrient-rich over time. We found no evidence of temporal changes in the yearly mean upstream and downstream discharges. The ratio upstream/downstream discharge was analyzed because it allowed us to assess how much contribution of additional unsampled tributaries may have biased our ability to calculate retention. Nutrient and sediment removal was less affected by hydraulic residence time than expected. Our study demonstrates that reservoirs can play a role in the removal and processing of nutrient and sediments, which has repercussions when valuing their ecological services and designing watershed management plans. 相似文献
106.
107.
Ygor Jacques Agra Bezerra da Silva Clístenes Williams Araújo do Nascimento Caroline Miranda Biondi 《Environmental monitoring and assessment》2014,186(1):47-53
The use of appropriate analytical methods is of paramount importance for risk assessment and monitoring of potentially toxic metals in soils. In this sense, the objective of this study was to compare the effectiveness of two sample digestion methods, recommended by the Brazilian legislation for the management of contaminated areas (CONAMA 2009), aiming at the determination of environmentally available metal concentrations (USEPA 3050B, USEPA 3051A), as well as a total digestion method (USEPA 3052). Samples from 10 classes of soils were analyzed for Cu, Zn, Cd, Pb, Ni, and Hg. The results showed that the USEPA method 3051A is more efficient than the USEPA method 3050B in the extraction of levels considered environmentally available of Zn, Cu, Cd, Pb, and Ni. Besides providing a higher recovery of these elements, the method requires shorter digestion time, lower consumption of acids, and reduced risk of contamination. The USEPA method 3051A showed greater efficiency in Hg extraction in soils with higher clay content. Therefore, it is suitable for situations where a wide range of soils with different mineralogical characteristics are analyzed or in order to decrease the losses due to volatilization of the element in open systems. 相似文献
108.
109.
110.
Feliphe Lacerda Souza de Alencar Julio Alejandro Navoni Viviane Souza do Amaral 《Environmental science and pollution research international》2017,24(20):16545-16559
Metal pollution is a current environmental issue as a consequence of unregulated anthropic activiy. A wide range of bioremediation strategies have been successfully implemented to recover contaminated areas. Among them, bacterial bioremediation stands out as a promising tool to confront these types of concerns. This study aimed to compare and discuss worldwide scientific evolution of bacterial potential for metal bioremediation in aquatic ecosystems. The study consisted of a systematic review, elaborated through a conceptual hypothesis model, during the period from 2000 to 2016, using PubMed, MEDLINE, and SciELO databases as data resources. The countries with the largest number of reports included in this work were India and the USA. Industrial wastewater discharge was the main subject associated to metal contamination/pollution and where bacterial bioremediations have mostly been applied. Biosorption is the main bioremediation mechanism described. Bacterial adaptation to metal presence was discussed in all the selected studies, and chromium was the most researched bioremedied substrate. Gram-negative Pseudomonas aeruginosas and the Gram-positive Bacillus subtilis bacteria were microorganisms with the greatest applicability for metal bioremediation. Most reports involved the study of genes and/or proteins related to metal metabolism and/or resistence, and Chromobacterium violaceum was the most studied. The present work shows the relevance of metal bacterial bioremediation through the high number of studies aimed at understanding the microbiological mechanisms involved. Moreover, the developed processes applied in removal and/or reducing the resulting environmental metal contaminant/pollutant load have become a current and increasingly biotechnological issue for recovering impacted areas. 相似文献