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排序方式: 共有194条查询结果,搜索用时 31 毫秒
111.
Marcionília Fernandes Pimentel Évila Pinheiro Damasceno Paula Christine Jimenez Pedro Filipe Ribeiro Araújo Marcielly Freitas Bezerra Pollyana Cristina Vasconcelos de Morais Rivelino Martins Cavalcante Susana Loureiro Letícia Veras Costa Lotufo 《Environmental monitoring and assessment》2016,188(5):298
112.
Francisco W. Sousa André G. Oliveira Jefferson P. Ribeiro Morsyleide F. Rosa Denis Keukeleire Ronaldo F. Nascimento 《Journal of environmental management》2010,91(8):1634-1640
This study applies green coconut shells as adsorbent for the removal of toxic metal ions from aqueous effluents using column adsorption. The results show that a flow rate of 2 mL/min and a bed height of 10 cm are most feasible. Furthermore, larger amounts of effluent can be treated for removal of single ions. The breakthrough curves for multiple elements gave the order of adsorption capacity: Cu+2 > Pb+2 > Cd+2 > Zn+2 > Ni+2. Real samples arising from the electroplating industry can be efficiently handled. 相似文献
113.
Dall’Agnol Patricia Libardi Nelson da Silva Eduarda Coradini da Costa Rejane Helena Ribeiro 《Journal of Polymers and the Environment》2022,30(2):695-706
Journal of Polymers and the Environment - The purpose of this study was to investigate the phosphorus (P) adsorption mechanism, kinetic, isothermal and thermodynamic parameters using alginate-like... 相似文献
114.
Daiane Tomacheski Michele Pittol Douglas Naue Simões Vanda Ferreira Ribeiro Ruth Marlene Campomanes Santana 《环境科学学报(英文版)》2017,29(6):230-239
In order to reduce the level of transmission of diseases caused by bacteria and fungi, the development of antimicrobial additives for use in personal care, hygiene products, clothing and others has increased. Many of these additives are based on metals such as silver and titanium. The disposal of these products in the environment has raised concerns pertaining to their potential harmfulness for beneficial organisms. The objective of this study was to evaluate the influence of the shape, surface chemistry, size and carrier of three additives containing silver and one with titanium dioxide (TiO2) on microcrustacean survival. Daphnia magna was used as a bioindicator for acute exposure test in suspensions from 0.0001 to 10,000 ppm. Ceriodaphnia dubia was used for chronic test in TiO2 suspensions from 0.001 to 100 ppm. D. magna populations presented high susceptibility to all silver based additives, with 100% mortality after 24 hr of exposure. A different result was found in the acute experiments containing TiO2 suspensions, with mortality rates only after 48 hr of incubation. Even on acute and chronic tests, TiO2 did not reach a linear concentration-response versus mortality, with 1 ppm being more toxic than 10,000 ppm on acute test and 0.001 more toxic than 0.01 ppm on chronic assay. Silver based material toxicity was attributed to silver itself, and had no relation to either form (nano or ion) or carrier (silica, phosphate glass or bentonite). TiO2 demonstrated to have a low acute toxicity against D. magna. 相似文献
115.
Andrade Mariana Carvalho Araujo Nara Santos Vianna Maria Isabel Pereira Cangussu Maria Cristina Teixeira Gomes-Filho Isaac Suzart Ribeiro Daniel Araki Cury Patrícia Ramos dos Santos Jean Nunes 《Environmental science and pollution research international》2021,28(43):60717-60725
Environmental Science and Pollution Research - Studies have shown that domestic waste collectors are exposed to toxicants including infectious pathogens, which may be linked to their oral health... 相似文献
116.
Zerrifi Soukaina El Amrani Redouane El Mahdi Mugani Richard Ribeiro Inês de Fátima Carvalho Maria Campos Alexandre Barakate Mustapha Vasconcelos Vitor Oudra Brahim El Khalloufi Fatima 《Environmental science and pollution research international》2021,28(1):235-245
Environmental Science and Pollution Research - In recent decades, harmful cyanobacterial blooms (HCBs) have become a severe hazard for human health mainly in drinking water resources and are... 相似文献
117.
Virginia Alves Martins Maria Cazelli Lucas Yhasnara Missilene da CristineSilva Layla Barros Saibro Murilo Bobco Fabia Emanuela Rafaloski Rubio Belen Ferreira Bruna Castelo Wellen Fernanda Louzada Santos José Francisco Ribeiro Sara Frontalini Fabrizio Martínez-Colón Michael Pereira Egberto Antonioli Luzia Geraldes Mauro Rocha Fernando Sousa Silvia Helena Mello e Manuel Alveirinho Dias João 《Environmental science and pollution research international》2022,29(46):69652-69679
Environmental Science and Pollution Research - We analyze potential Late Holocene metal contamination along a sediment core collected in the distal zone of Ria de Vigo (North Spain). Statistical... 相似文献
118.
M.C.M. Alvim Ferraz J.I. Barcelos Cardoso S.L. Ribeiro Pontes 《Journal of the Air & Waste Management Association (1995)》2013,63(1):131-136
ABSTRACT The purpose of this paper is to quantify the production of medical waste from a general hospital and to evaluate the atmospheric pollutant concentrations in gaseous emissions associated with its incineration. A 3.8 kg (bed.day)-1 production of medical waste was estimated for 1998; its incineration is related with an ash production of 0.3-0.4 kg (bed.day)-1. The concentrations of atmospheric pollutants were estimated using emission factors, comparing the effluents with and without control of atmospheric pollutants. The calculated concentrations were compared with the emission limits established by Portuguese legislation. The results indicate that, if there is no control of atmospheric pollutants, their concentrations exceed the established limits. This is observed even if correct operation and maintenance procedures are used. The emission concentrations of dioxins are higher than the Portuguese emission limit, which is particularly worrying due to the high toxicity of some of these compounds. Generally, it is possible to reduce pollutant concentrations if appropriate control equipment is used. The conclusions obtained clearly justify the great concern regarding air pollution associated with medical waste incinerators currently operating in Portugal. 相似文献
119.
Guanabara Bay is a 384-km2 coastal bay with 70% of the population of the metropolitan area of Rio de Janeiro located within its drainage basin. The
water quality of the Bay is impacted by domestic and industrial runoff, of which only 15% has been adequately treated. However,
based on a 14-year monitoring program, the water quality for most of Guanabara Bay remains acceptable because of intense tidal
flushing, and we failed to find a worsening of conditions during the 14-year study. The inner shallow regions of the Bay,
the western and northwestern parts, receive most of the drainage from metropolitan Rio de Janeiro. It is here that the water
quality is alarmingly poor, characterized by hypertrophic conditions and occasional hypoxic events. Fecal coliform counts
in these inner reaches of the Bay are 4–100 times higher than the maximum acceptable count for recreational waters. Hypertrophic
conditions prevail in Guanabara Bay, which is characterized by low dissolved oxygen, high biochemical oxygen demand, peaks
in fecal coliform, and extremely high chlorophyll-a concentrations, which reflect high quantities of nutrients entering the system. These anthropogenic pressures are a threat
to planktonic and benthic communities and are reminiscent of San Francisco Bay 30 years ago. The Guanabara Bay water quality
could be returned to pre-1950 conditions, but it would require sufficient political will and economic investment to ensure
that at least 80–90% of the domestic and industrial sewage were treated adequately.
Electronic Publication 相似文献
120.
Fiddler crabs consume the surficial microphytobenthos around their burrows during low tide. We studied the spatial and temporal feeding patterns in the species Uca uruguayensis by using sequences of digital pictures of feeding pellets accumulation. Data from 61 crabs, feeding without the interference of neighbors, were fitted to different models using Maximum Likelihood and Bayesian approaches. Initial feeding location was independent from the emergence location, and then, crabs continued holding a main feeding direction (clockwise or counterclockwise), suggesting a systematic mechanism that may avoid feeding over already processed sediment. Crabs used at least half of their potential feeding area, but these areas were heterogeneous. Both sexes developed similar feeding areas; however, females were faster and needed less time to feed than males, suggesting that males are time restricted. Our work also highlights the importance of incorporating other underlying mechanisms of the behavior of species into the study of feeding strategies. 相似文献