全文获取类型
收费全文 | 247篇 |
免费 | 3篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 18篇 |
环保管理 | 23篇 |
综合类 | 26篇 |
基础理论 | 32篇 |
污染及防治 | 107篇 |
评价与监测 | 28篇 |
社会与环境 | 16篇 |
出版年
2023年 | 8篇 |
2022年 | 16篇 |
2021年 | 28篇 |
2020年 | 14篇 |
2019年 | 8篇 |
2018年 | 13篇 |
2017年 | 12篇 |
2016年 | 17篇 |
2015年 | 9篇 |
2014年 | 20篇 |
2013年 | 24篇 |
2012年 | 9篇 |
2011年 | 12篇 |
2010年 | 11篇 |
2009年 | 10篇 |
2008年 | 10篇 |
2007年 | 6篇 |
2006年 | 4篇 |
2005年 | 4篇 |
2004年 | 2篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 1篇 |
1998年 | 1篇 |
1990年 | 1篇 |
1976年 | 1篇 |
1970年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有252条查询结果,搜索用时 125 毫秒
211.
Walter Nei Lopes dos Santos Samuel Marques Macedo Sofia Negreiros Teixeira da Rocha Caio Niela Souza de Jesus Dannuza Dias Cavalcante Vanessa Hatje 《Environmental monitoring and assessment》2014,186(8):5027-5032
This work proposes a procedure for the determination of total selenium content in shellfish after digestion of samples in block using cold finger system and detection using atomic fluorescent spectrometry coupled hydride generation (HG AFS). The optimal conditions for HG such as effect and volume of prereduction KBr 10 % (m/v) (1.0 and 2.0 ml) and concentration of hydrochloric acid (3.0 and 6.0 mol L?1) were evaluated. The best results were obtained using 3 mL of HCl (6 mol L?1) and 1 mL of KBr 10 % (m/v), followed by 30 min of prereduction for the volume of 1 mL of the digested sample. The precision and accuracy were assessed by the analysis of the Certified Reference Material NIST 1566b. Under the optimized conditions, the detection and quantification limits were 6.06 and 21.21 μg kg?1, respectively. The developed method was applied to samples of shellfish (oysters, clams, and mussels) collected at Todos os Santos Bay, Bahia, Brazil. Selenium concentrations ranged from 0.23?±?0.02 to 3.70?±?0.27 mg kg?1 for Mytella guyanensis and Anomalocardia brasiliana, respectively. The developed method proved to be accurate, precise, cheap, fast, and could be used for monitoring Se in shellfish samples. 相似文献
212.
Elisângela Costa Santos Joil José Celino Vera Lúcia Cancio Souza Santos José Roberto Bispo De Souza 《Environmental monitoring and assessment》2013,185(12):9857-9869
Elemental analysis and isotopic composition evaluated the impact of human activity at the surface sediments in the largest island of Todos os Santos Bay, northeastern Brazil. Saturated hydrocarbons (n-alkanes and isoprenoids) by gas chromatography coupled with a flame ionization detector and 13C by mass spectrometer were determined from 30 surface sediment samples in mangroves at the Itaparica Island (Bahia-Brazil) in the rainy and dry season. These data, distribution, and ratio of carbon/nitrogen showed a mixture of sources: continental, marine, and anthropogenic ones. From the chromatographic profiles, light oil contamination was observed in the dry regions of Baiacu, Campinas, and Ponta Grossa, while in Jiribatuba it was observed during the rainy season. However, δ13C results during dry and rainy season in the presence of oil also showed in Misericordia and Cacha Prego districts for both periods and Ponta Grossa during the rainy season. Principal component analysis, using a correlation matrix, revealed the latent relationships among all the surface sediment stations investigated and confirmed our analytical results. 相似文献
213.
Castilhos Stefani de Souza Fernando Manzotti Colpini Leda Maria Saragiotto de Mattos Jorge Luiz Mario dos Santos Onélia Aparecida Andreo 《Environmental science and pollution research international》2020,27(18):22155-22168
Environmental Science and Pollution Research - The presence of endocrine disrupting compounds in water receptor bodies, such as drugs, currently has in scientific field a great focus of studies... 相似文献
214.
de Souza Celente Gleison Colares Gustavo Stolzenberg Machado Ênio Leandro Lobo Eduardo Alexis 《Environmental science and pollution research international》2019,26(10):9931-9937
Environmental Science and Pollution Research - Water shortage is a current problem faced by many regions. The deterioration of water bodies driven by the directly discard of untreated wastewater... 相似文献
215.
de Souza Camila da Costa Barros García Andrés Calderín Lima Erica Souto Abreu do Amaral Sobrinho Nelson Moura Brasil 《Journal of Material Cycles and Waste Management》2023,25(4):2232-2244
Journal of Material Cycles and Waste Management - This study aimed to elucidate the formation process of humic substances (HS) during poultry litter (PL) composting and its influence on the... 相似文献
216.
Melo Mikhael Rangel de Souza Dias Nildo da Silva de Medeiros Igor José Nascimento Travassos Kaline Dantas Miranda Neyton de Oliveira Gurgel Marcelo Tavares Lemos Neto Hozano de Souza Fernandes Cleyton dos Santos 《Environmental science and pollution research international》2020,27(31):38537-38544
Environmental Science and Pollution Research - In a context of scarcity of good quality water, reuse is a mandatory practice to increase water availability, thus allowing the exploitation of more... 相似文献
217.
Brown GS Betty RG Brockmann JE Lucero DA Souza CA Walsh KS Boucher RM Tezak MS Wilson MC 《Journal of environmental monitoring : JEM》2007,9(7):666-671
Vacuum filter socks were evaluated for recovery efficiency of powdered Bacillus atrophaeus spores from two non-porous surfaces, stainless steel and painted wallboard and two porous surfaces, carpet and bare concrete. Two surface coupons were positioned side-by-side and seeded with aerosolized Bacillus atrophaeus spores. One of the surfaces, a stainless steel reference coupon, was sized to fit into a sample vial for direct spore removal, while the other surface, a sample surface coupon, was sized for a vacuum collection application. Deposited spore material was directly removed from the reference coupon surface and cultured for enumeration of colony forming units (CFU), while deposited spore material was collected from the sample coupon using the vacuum filter sock method, extracted by sonication and cultured for enumeration. Recovery efficiency, which is a measure of overall transfer effectiveness from the surface to culture, was calculated as the number of CFU enumerated from the filter sock sample per unit area relative to the number of CFU enumerated from the co-located reference coupon per unit area. The observed mean filter sock recovery efficiency from stainless steel was 0.29 (SD = 0.14, n = 36), from painted wallboard was 0.25 (SD = 0.15, n = 36), from carpet was 0.28 (SD = 0.13, n = 40) and from bare concrete was 0.19 (SD = 0.14, n = 44). Vacuum filter sock recovery quantitative limits of detection were estimated at 105 CFU m(-2) from stainless steel and carpet, 120 CFU m(-2) from painted wallboard and 160 CFU m(-2) from bare concrete. The method recovery efficiency and limits of detection established in this work provide useful guidance for the planning of incident response environmental sampling for biological agents such as Bacillus anthracis. 相似文献
218.
219.
Vânia L. Souza Alex-Alan F. de Almeida Jadiel de S. Souza Pedro A. O. Mangabeira Raildo M. de Jesus Carlos P. Pirovani Dário Ahnert Virupax C. Baligar Leandro L. Loguercio 《Environmental science and pollution research international》2014,21(2):1217-1230
Seedlings of Theobroma cacao CCN 51 genotype were grown under greenhouse conditions and exposed to increasing concentrations of Cu (0.005, 1, 2, 4, 8, 16, and 32 mg Cu L?1) in nutrient solution. When doses were equal or higher than 8 mg Cu L?1, after 24 h of treatment application, leaf gas exchange was highly affected and changes in chloroplasts thylakoids of leaf mesophyll cells and plasmolysis of cells from the root cortical region were observed. In addition, cell membranes of roots and leaves were damaged. In leaves, 96 h after treatments started, increases in the percentage of electrolyte leakage through membranes were observed with increases of Cu in the nutrient solution. Moreover, there was an increase in the concentration of thiobarbituric acid-reactive substances in roots due to lipid peroxidation of membranes. Chemical analysis showed that increases in Cu concentrations in vegetative organs of T. cacao increased with the increase of the metal in the nutrient solution, but there was a greater accumulation of Cu in roots than in shoots. The excess of Cu interfered in the levels of Mn, Zn, Fe, Mg, K, and Ca in different organs of T. cacao. Analysis of gene expression via RTq-PCR showed increased levels of MT2b, SODCyt, and PER-1 expression in roots and of MT2b, PSBA, PSBO, SODCyt, and SODChI in leaves. Hence, it was concluded that Cu in nutrient solution at doses equal or above 8 mg L?1 significantly affected leaf gas exchange, cell ultrastructure, and transport of mineral nutrients in seedlings of this T. cacao genotype. 相似文献
220.
Groundwater used for drinking and cooking was analysed for fluoride (F), and health surveys were conducted in Bodh Gaya, Amas and Bankebazaar blocks of the Gaya district, Bihar, India. Amas and Bankebazaar blocks were F endemic areas with mean F = 2.36 ± 0.23 mg/L (N = 27). Bodh Gaya was considered as control area with mean F = 0.59 ± 0.03 mg/L (N = 11). Health survey showed that more than 50 % of adults and more than 55 % of children had complaints of gastro-intestinal (GI) disturbances in the F endemic areas, while less than 20 % of adults and less than 10 % of children complained of GI problems in the control areas. Haematological analyses were conducted on age- and sex-matched fluorotic subjects (N = 93) of F endemic areas, and non-fluorotic subjects (N = 52) of control area showed lowered haemoglobin, haematocrit, mean corpuscular volume, mean corpuscular haemoglobin, and mean corpuscular haemoglobin concentration in the fluorotic subjects, suggesting the occurrence of anaemia in the fluorotic subjects. 相似文献