全文获取类型
收费全文 | 71篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 2篇 |
环保管理 | 8篇 |
综合类 | 12篇 |
基础理论 | 17篇 |
污染及防治 | 24篇 |
评价与监测 | 3篇 |
社会与环境 | 7篇 |
灾害及防治 | 1篇 |
出版年
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2013年 | 8篇 |
2012年 | 4篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2006年 | 1篇 |
2004年 | 2篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有76条查询结果,搜索用时 187 毫秒
31.
Antony A Bassendeh M Richardson D Aquilina S Hodgkinson A Law I Leslie G 《Chemosphere》2012,86(8):829-836
Granular activated carbon (GAC) exhaustion rates on pulp and paper effluent from South East Australia were found to be a factor of three higher (3.62 cf. 1.47 kg m−3) on Kraft mills compared to mills using Thermomechanical pulping supplemented by Recycled Fibre (TMP/RCF). Biological waste treatment at both mills resulted in a final effluent COD of 240 mg L−1. The dissolved organic carbon (DOC) was only 1.2 times higher in the Kraft effluent (70 vs. 58 mg L−1), however, GAC treatment of Kraft and TMP/RCF effluent was largely different on the DOC persisted after biological treatment. The molecular mass (636 vs. 534 g mol−1) and aromaticity (5.35 vs. 4.67 L mg−1 m−1) of humic substances (HS) were slightly higher in the Kraft effluent. The HS aromaticity was decreased by a factor of 1.0 L mg−1 m−1 in both Kraft and TMP/RCF effluent. The molecular mass of the Kraft effluent increased by 50 g mol−1 while the molecular mass of the TMP/RCF effluent was essentially unchanged after GAC treatment; the DOC removal efficiency of the GAC on Kraft effluent was biased towards the low molecular weight humic compounds. The rapid adsorption of this fraction, coupled with the slightly higher aromaticity of the humic components resulted in early breakthrough on the Kraft effluent. Fluorescence excitation-emission matrix analysis of the each GAC treated effluent indicated that the refractory components were higher molecular weight humics on the Kraft effluent and protein-like compounds on the TMP/RCF effluent. Although the GAC exhaustion rates are too high for an effective DOC removal option for biologically treated pulp and paper mill effluents, the study indicates that advanced organic characterisation techniques can be used to diagnose GAC performance on complex effluents with comparable bulk DOC and COD loads. 相似文献
32.
Novel brominated flame retardants: a review of their analysis, environmental fate and behaviour 总被引:7,自引:0,他引:7
Covaci A Harrad S Abdallah MA Ali N Law RJ Herzke D de Wit CA 《Environment international》2011,37(2):532-556
This review summarises current knowledge about production volumes, physico-chemical properties, analysis, environmental occurrence, fate and behaviour and human exposure to the "novel" brominated flame retardants (NBFRs). We define the term NBFRs as relating to BFRs which are new to the market or newly/recently observed in the environment. Restrictions and bans on the use of some polybrominated diphenyl ether (PBDE) formulations, in many jurisdictions, have created a market for the use of NBFRs. To date, most data on NBFRs have arisen as additional information generated by research designed principally to study more "traditional" BFRs, such as PBDEs. This has led to a wide variety of analytical approaches for sample extraction, extract purification and instrumental analysis of NBFRs. An overview of environmental occurrence in abiotic matrices, aquatic biota, terrestrial biota and birds is presented. Evidence concerning the metabolism and absorption of different NBFRs is reviewed. Human exposure to NBFRs via different exposure pathways is discussed, and research gaps related to analysis, environmental sources, fate, and behaviour and human exposure are identified. 相似文献
33.
深圳河口泥滩多毛类动物的生态研究 总被引:19,自引:2,他引:19
1996年在深圳河口潮间带泥滩的4个季度调查共获得多毛类动物16种。与大亚湾大鹏澳软相潮间带和九龙江口海岸潮间带多毛类相比,深圳河口潮间带泥滩多毛类种类较少,但密度和生物量较高,这与底质、有机质含量,红树林碎屑等有关,潮汐对深圳河口潮间带泥滩多毛类垂直分布的影响不明显。一些多毛类动物密度和生物量的水平分布与盐度有关。 相似文献
34.
35.
Spatial patterns reveal negative density dependence and habitat associations in tropical trees 总被引:1,自引:0,他引:1
Bagchi R Henrys PA Brown PE Burslem DF Diggle PJ Gunatilleke CV Gunatilleke IA Kassim AR Law R Noor S Valencia RL 《Ecology》2011,92(9):1723-1729
Understanding how plant species coexist in tropical rainforests is one of the biggest challenges in community ecology. One prominent hypothesis suggests that rare species are at an advantage because trees have lower survival in areas of high conspecific density due to increased attack by natural enemies, a process known as negative density dependence (NDD). A consensus is emerging that NDD is important for plant-species coexistence in tropical forests. Most evidence comes from short-term studies, but testing the prediction that NDD decreases the spatial aggregation of tree populations provides a long-term perspective. While spatial distributions have provided only weak evidence for NDD so far, the opposing effects of environmental heterogeneity might have confounded previous analyses. Here we use a novel statistical technique to control for environmental heterogeneity while testing whether spatial aggregation decreases with tree size in four tropical forests. We provide evidence for NDD in 22% of the 139 tree species analyzed and show that environmental heterogeneity can obscure the spatial signal of NDD. Environmental heterogeneity contributed to aggregation in 84% of species. We conclude that both biotic interactions and environmental heterogeneity play crucial roles in shaping tree dynamics in tropical forests. 相似文献
36.
Ruo-Qian Wang Adrian Wing-Keung Law E. Eric Adams Oliver B. Fringer 《Environmental Fluid Mechanics》2011,11(6):591-609
A series of Large Eddy Simulations (LES) are performed to investigate the penetration of starting buoyant jets. The LES code
is first validated by comparing simulation results with existing experimental data for both steady and starting pure jets
and lazy plumes. The centerline decay and the growth rate of the velocity and concentration fields for steady jets and plumes,
as well as the simulated transient penetration rate of a starting pure jet and a starting lazy plume, are found to compare
well with the experiments. After validation, the LES code is used to study the penetration of starting buoyant jets with three
different Reynolds numbers from 2000 to 3000, and with a wide range of buoyancy fluxes from pure jets to lazy plumes. The
penetration rate is found to increase with an increasing buoyancy flux. It is also observed that, in the initial Period of
Flow Development, the two penetrative mechanisms driven by the initial buoyancy and momentum fluxes are uncoupled; therefore
the total penetration rate can be resolved as the linear addition of these two effects. A fitting equation is proposed to
predict the penetration rate by combining the two independent mechanisms. 相似文献
37.
Phillip Williamson Douglas W.R. Wallace Cliff S. Law Philip W. Boyd Yves Collos Peter Croot Ken Denman Ulf Riebesell Shigenobu Takeda Chris Vivian 《Process Safety and Environmental Protection》2012,90(6):475-488
Dangerous climate change is best avoided by drastically and rapidly reducing greenhouse gas emissions. Nevertheless, geoengineering options are receiving attention on the basis that additional approaches may also be necessary. Here we review the state of knowledge on large-scale ocean fertilization by adding iron or other nutrients, either from external sources or via enhanced ocean mixing. On the basis of small-scale field experiments carried out to date and associated modelling, the maximum benefits of ocean fertilization as a negative emissions technique are likely to be modest in relation to anthropogenic climate forcing. Furthermore, it would be extremely challenging to quantify with acceptable accuracy the carbon removed from circulation on a long term basis, and to adequately monitor unintended impacts over large space and time-scales. These and other technical issues are particularly problematic for the region with greatest theoretical potential for the application of ocean fertilization, the Southern Ocean. Arrangements for the international governance of further field-based research on ocean fertilization are currently being developed, primarily under the London Convention/London Protocol. 相似文献
38.
Different dosages of ferrous chloride and ferric chloride were added to digestors separately, and the volumes of methane and hydrogen sulphide contained in the digestor gas (biogas) were monitored. It was noted that the effects of adding of 16, 18 and 32 kg ferrous chloride/ tonne volatile solids, and 16 and 18 kg ferric chloride/tonne volatile solids were similarly effective in controlling the hydrogen sulphide levels. According to an average amount of undigested sludge (primary sludge mixed with surplus activated sludge) of 41 tonne volatile solids produced each day during the sewage treatment process in Shatin sewage treatment works, and the required dosage of 16 kg ferric chloride/ tonne volatile solids, the amount of iron salts required should be 656 kg/day or 3.3 mg/L for the actual application, based on an average sewage flow of 200,000 m3/day. 相似文献
39.
Locally designed, institutional frameworks are being used to develop and implement remedial action plans (RAPs) to restore
beneficial uses in 43 Great Lakes areas of concern. A 1993 Canada-United States roundtable was convened to learn from case
studies and to develop recommendations regarding essential characteristics of RAP institutional frameworks, guidance to ensure
linkages to other related plans, and ways of embracing new institutional frameworks from RAP development to implementation.
Major roundtable recommendations are: (1) RAP institutional frameworks should be empowered to pursue their mission of restoring
uses. Empowerment would be demonstrated by: a watershed focus, inclusive and shared decision-making, clear responsibilities
and sufficient authority, creative funding capability, flexibility and continuity in the process, an iterative process of
continuous improvement, and commitment to education and outreach. (2) RAP institutional frameworks should be used as mechanisms
to coordinate programs at the local level. Such local coordination should be complemented with governmental commitments to
intra- and interagency coordination in work plans. (3) RAP institutional frameworks can help build the capacity of governments
to achieve their goals. Therefore, governments must adopt long-term, visionary goals and commit to a customer-driven RAP process
of continuous improvement. 相似文献
40.
Toxic equivalency factors for PAH and their applicability in shellfish pollution monitoring studies 总被引:2,自引:0,他引:2
Law RJ Kelly C Baker K Jones J McIntosh AD Moffat CF 《Journal of environmental monitoring : JEM》2002,4(3):383-388
Fish and shellfish are exposed to a wide range of polycyclic aromatic hydrocarbons (PAH) following oil spills at sea, and can become contaminated as a result. Finfish have a more effective mixed-function oxidase enzyme system than shellfish, and are therefore able to metabolise and excrete PAH more effectively than the invertebrates. Thus, contamination by high-molecular weight PAH, including those with carcinogenic potential and so of concern with regard to human consumers, is therefore usually observed in shellfish, and particularly in bivalve molluscs. Oil spills are not the sole source of PAH, however, as parent compounds are also generated by a wide range of combustion processes. In this paper, consideration is given to monitoring data gathered following recent oil spills (both of crude oil and diesel fuel), alongside data from other studies. These include studies conducted around a former gasworks site and downstream of an aluminium smelter in the UK, and from mussel monitoring studies undertaken in the UK and the USA (including the Exxon Valdez oil spill and the National Status and Trends programme), and in other countries in Europe. For comparative purposes the PAH concentrations are summed and also expressed as benzo[a]pyrene equivalents, their relative concentrations being weighted in relation to the carcinogenic potential of individual PAH compounds using toxic equivalency factors (TEF). Our aim was to assess the utility of this approach in fishery resource monitoring and control following oil spills. Certainly this approach seems useful from the data assessed in this study. and the relative ranking of the various studies seems to reflect the relative degree of concern for human consumers due to the differing contamination sources. As a simple tool for control purposes it is equally applicable to PAH derived from oil spills, and from industrial and combustion sources. 相似文献