全文获取类型
收费全文 | 77篇 |
免费 | 3篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 2篇 |
环保管理 | 8篇 |
综合类 | 21篇 |
基础理论 | 14篇 |
污染及防治 | 19篇 |
评价与监测 | 7篇 |
社会与环境 | 3篇 |
灾害及防治 | 3篇 |
出版年
2022年 | 3篇 |
2021年 | 3篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 5篇 |
2016年 | 5篇 |
2015年 | 4篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 1篇 |
2011年 | 7篇 |
2010年 | 4篇 |
2009年 | 6篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 3篇 |
2005年 | 1篇 |
2004年 | 4篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1974年 | 2篇 |
1972年 | 1篇 |
1971年 | 3篇 |
1969年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有81条查询结果,搜索用时 140 毫秒
11.
Heather J. Shipley Karen E. Engates Valerie A. Grover 《Environmental science and pollution research international》2013,20(3):1727-1736
Nanoparticles offer the potential to improve environmental treatment technologies due to their unique properties. Adsorption of metal ions (Pb(II), Cd(II), Cu(II), Zn(II)) to nanohematite was examined as a function of sorbent concentration, pH, temperature, and exhaustion. Adsorption experiments were conducted with 0.05, 0.1, and 0.5 g/L nanoparticles in a pH 8 solution and in spiked San Antonio tap water. The adsorption data showed the ability of nanohematite to remove Pb, Cd, Cu, and Zn species from solution with adsorption increasing as the nanoparticle concentration increased. At 0.5 g/L nanohematite, 100 % Pb species adsorbed, 94 % Cd species adsorbed, 89 % Cu species adsorbed and 100 % Zn species adsorbed. Adsorption kinetics for all metals tested was described by a pseudo second-order rate equation with lead having the fastest rate of adsorption. The effect of temperature on adsorption showed that Pb(II), Cu(II), and Cd(II) underwent an endothermic reaction, while Zn(II) underwent an exothermic reaction. The nanoparticles were able to simultaneously remove multiple metals species (Zn, Cd, Pb, and Cu) from both a pH 8 solution and spiked San Antonio tap water. Exhaustion experiments showed that at pH 8, exhaustion did not occur for the nanoparticles but adsorption does decrease for Cd, Cu, and Zn species but not Pb species. The strong adsorption coupled with the ability to simultaneously remove multiple metal ions offers a potential remediation method for the removal of metals from water. 相似文献
12.
South Australian organizations assess their OHSMS through audits as evidence of risk control and to help make workplaces healthy and safe. Auditing is an evaluative process regarded as an important step in the cycle of continuous improvement in OHS. Auditing began with financial audits conducted for reasons of corporate governance: for accountability, to inform management decisions and to provide market confidence. Society expects audits to be a tool of regulation, governance and accountability, but celebrated failures of audits to warn of impending financial collapse in organizations in recent years appears to have led to an increased fervour for auditing, rather than a decline. Social audits, including auditing of OHSMS, are intended to determine that an organization is meeting its corporate social responsibilities; but what is audited is often contested and requires subjective analysis. Financial and social audits are subject to failure: unintentional errors, deliberate fraud, financial interests causing undue influence, and undue influence from personal relationships between the auditor and client. We identify five further categories of failure: lack of worker participation; paperwork for the sake of the audit; goal displacement of audit scoring; confusion of audit criteria; and lack of auditor independence and skill. There has been a shift in focus: the current demand and preparation for auditing distracts organizations from the primary goal of making the workplace healthy and safe. We argue that auditing OHSMS has become a ritual rather than a means of improving workplace health and safety and should at least be treated with caution. 相似文献
13.
Li L Cunningham CJ Pas V Philp JC Barry DA Anderson P 《Waste management (New York, N.Y.)》2004,24(2):127-137
The influence of a new aeration system on the biopile performance was investigated. The purpose was to increase biodegradation efficiency by optimising airflow through the pile. During a 1-month field trial, the performance of a new system using two perforated vertical pipes with wind-driven turbines was compared with that of a standard pile configuration with two horizontal perforated pipes. Both piles were composed of a similar mix of diesel-contaminated soils, woodchips, compost and NPK fertiliser. Hydrocarbons were recovered using solvent extraction, and determined both gravimetrically and by gas chromatography. Total heterotrophs, pH and moisture content were also assessed. Air pressure measurements were made to compare the efficiency of suction in the pipes. Results at the end of the experiment showed that there was no significant difference between the two piles in the total amount of hydrocarbon biodegradation. The normalised degradation rate was, however, considerably higher in the new system than in the standard one, suggesting that the vertical venting method may have improved the efficiency of the biological reactions in the pile. The pressure measurements showed a significant improvement in the suction produced by the new aeration system. However, many factors other than the airflow (oxygen supply) may influence and limit the biodegradation rates, including moisture content, age of contaminants and the climatic conditions. Additional experiments and modelling need to be carried out to explore further the new aeration method and to develop criteria and guidelines for engineering design of optimal aeration schemes in order to achieve maximum biodegradation in biopiles. 相似文献
14.
Cyclone mitigation, resource allocation and post-disaster reconstruction in south India: lessons from two decades of research 总被引:3,自引:0,他引:3
Winchester P 《Disasters》2000,24(1):18-37
This paper opens with a history of development and disaster-prevention strategies in a cyclone-prone area of the east coast of India and traces the evolution in the area of British and Indian governments' programmes and policy over a century. Research over the last 20 years has shown, however, that the programmes and policies have failed to balance economic growth with safety. Resources intended for the benefit of all have been diverted by alliances of powerful people to a small minority, and recent developments have reduced the physical protection of the area. The result is that increasing numbers of people are vulnerable to the effects of cyclones and floods. The findings suggest that the best way to reduce vulnerability is to improve the socio-economic standing of the most vulnerable and for this to happen these people must have an assured income based on assets that will enable them to acquire social and economic credit-worthiness within the local economy. This paper presents evidence that suggests that non-governmental organisation (NGO)-supported co-operatives are the best way to achieve this through self-help and self-employment schemes. It also suggests that NGOs should be encouraged to take up environmentally and ecologically beneficial activities involving the poorest groups in the communities, in this way combining sustained self-employment with environmental protection. 相似文献
15.
Kenneth C. Schiff Stephen B. Weisberg Valerie Raco-Rands 《Environmental management》2001,29(6):871-876
Monitoring of the ocean environment in southern California, USA, has been conducted by a diverse array of public and private organizations with different motivations, working on a variety of spatial and temporal scales. To create a basis from which to integrate information from these diverse programs, we conducted an inventory of ocean monitoring activities in the Southern California Bight to address the following questions: (1) How much money is being expended annually on marine monitoring programs? (2) Which organizations are conducting the most monitoring? (3) How are resources allocated among the different types of monitoring programs? This inventory focused on programs existing, or those expected to be in existence, for at least 10 years and that were active at any time between 1994 and 1997. For each program identified for inclusion in this study, information was collected on the number of sites, sampling intensity, parameters measured, and methods used. Levels of effort were translated into cost estimates based upon a market survey of local consulting firms. One hundred fourteen marine monitoring programs, conducted by 65 organizations and costing US $31 million annually, were identified. Most of the effort (81 programs, 65% of samples, 70% of costs) was expended by ocean dischargers as part of their compliance with National Pollutant Discharge Elimination System (NPDES) permit requirements. Federal programs (11 programs, 25% of samples, 10% of total expenditures) expended more than state or local government programs. More than one quarter of monitoring expenditures were conducted to measure concentrations and mass of effluent inputs to the ocean. The largest effort expended on receiving water monitoring was for measuring bacteria, followed by sediments, fish/shellfish, water quality, and intertidal habitats. The large level of expenditures by individual agencies has presented opportunities for integrating small, site-specific ocean monitoring programs into regional- and national-scale monitoring and assessment programs. 相似文献
16.
17.
18.
Miguel Vences Mariana L. Lyra Jordan G. Kueneman Molly C. Bletz Holly M. Archer Julia Canitz Svenja Handreck Roger-Daniel Randrianiaina Ulrich Struck Sabin Bhuju Michael Jarek Robert Geffers Valerie J. McKenzie Christoph C. Tebbe Célio F. B. Haddad Julian Glos 《Die Naturwissenschaften》2016,103(3-4):25
19.
火山灰的研究作为探讨古气候和古环境的一种手段,近十年来引起了国内外学者的广泛关注。气候学和古环境学的研究表明,火山喷发可以导致某一区域内短期的气候变化或者对冰期产生强烈影响。同时,火山灰层的成因机制决定了其空间分布的等时性和广泛性,因此,火山灰的地层学特征和精确定年,具有重要的地层对比意义。目前,全球各地已经开展了许多火山灰年代学与地层学的研究。在中国,尤其是东北地区,虽然有着丰富的火山资源,但是火山灰年代学与地层学的研究工作依然比较匮乏,本文简要回顾了一下中国东北、欧洲、新西兰、日本、俄罗斯等地区的火山灰研究工作,旨在为以后的研究提供一定的参考资料。 相似文献
20.