全文获取类型
收费全文 | 817篇 |
免费 | 30篇 |
国内免费 | 135篇 |
专业分类
安全科学 | 57篇 |
废物处理 | 65篇 |
环保管理 | 172篇 |
综合类 | 372篇 |
基础理论 | 49篇 |
污染及防治 | 127篇 |
评价与监测 | 118篇 |
社会与环境 | 22篇 |
出版年
2024年 | 4篇 |
2023年 | 9篇 |
2022年 | 10篇 |
2021年 | 11篇 |
2020年 | 13篇 |
2019年 | 11篇 |
2018年 | 13篇 |
2017年 | 15篇 |
2016年 | 32篇 |
2015年 | 29篇 |
2014年 | 59篇 |
2013年 | 70篇 |
2012年 | 39篇 |
2011年 | 50篇 |
2010年 | 34篇 |
2009年 | 58篇 |
2008年 | 47篇 |
2007年 | 67篇 |
2006年 | 58篇 |
2005年 | 41篇 |
2004年 | 33篇 |
2003年 | 43篇 |
2002年 | 35篇 |
2001年 | 26篇 |
2000年 | 25篇 |
1999年 | 28篇 |
1998年 | 30篇 |
1997年 | 19篇 |
1996年 | 16篇 |
1995年 | 14篇 |
1994年 | 16篇 |
1993年 | 4篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1989年 | 2篇 |
1987年 | 2篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1976年 | 1篇 |
1973年 | 3篇 |
1972年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有982条查询结果,搜索用时 15 毫秒
931.
The current status of the treatment and disposal of hazardous wastes in China is summarized on the basis of the results of
the Declaring and Registration Project initiated nationally in 1995. A principle framework for the sound management of hazardous
wastes is proposed, which includes three levels of technical solutions. Large-scale enterprises are encouraged to recycle,
to treat, and to dispose of wastes by means of constructing facilities, and to have their extra capacities available to the
public for a reasonable fee. Municipal governments, provincial governments, and the Central Government are to plan and construct
centralized facilities to recycle, treat, and dispose of wastes. For a solution at the manufacturing level, recycling is identified
as the main approach. Centralized facilities at the municipal level will mainly focus on special wastes that are unsuitable
to transport and store, such as hospital waste, and for the technical solution at this level, incineration and recycling are
identified as the main approaches. For the technical solution at the provincial and national levels, landfill and incineration
are identified as the main approaches. Based on this principle and the current available data on hazardous wastes, a preliminary
plan for the spatial distribution of cross-provincial centralized treatment and disposal facilities of hazardous wastes is
presented. The construction of approximately nine cross-provincial comprehensive facilities is proposed. A priority list for
the construction of these planned facilities is also presented. 相似文献
932.
填埋场垃圾体的安全稳定性分析 总被引:8,自引:2,他引:6
卫生填埋场是一种安全经济、行之有效的固体废弃物最终处置方案。笔者总结分析了固体废弃物填埋场边坡不稳定问题以及其稳定破坏的类型和破坏机理,影响填埋场垃圾体稳定性的因素等,研究表明固体废弃物的强度指标、填埋体中淋滤液的饱和度、边坡角度和浸润线的埋深,以及填埋年代等因素都会影响填埋场垃圾体的稳定性。在此基础上,指出了目前填埋场垃圾体稳定问题研究的不足,提出了相关建议。 相似文献
933.
Eiji?FujimoriEmail author Kazuaki?Minamoto Seiko?Iwata Koichi?Chiba Hiroki?Haraguchi 《Journal of Material Cycles and Waste Management》2004,6(1):73-79
The elemental composition of the industrial waste incineration bottom ash (IWIBA) samples collected from three different types of incinerator with different kinds of wastes were compared. The major-to-ultratrace elements in the IWIBA samples were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). As a result, ca. 40 elements in the concentration range from milligrams per gram to submicrograms per gram could be determined with relative standard deviations of less than 5%. The IWIBA sample from petrochemical wastes contained lower concentrations of the elements, because fewer mineral constituents were contained in the input waste materials. On the contrary, the elemental concentrations in the IWIBA sample from industrial solid wastes provided the highest values for most elements, while the elemental compositions of the IWIBA sample from food wastes were similar to those of municipal solid waste incineration bottom ash. In addition, it was found from the analytical results that the levels of various heavy metals such as Cr, Mn, Fe, Ni, Cu, As, Zr, Mo, Sb, Ba, and Pb were higher in the IWIBA samples than in municipal solid waste incineration bottom ash. The enrichment factors of the elements in the IWIBA samples were estimated from the analytical results to compare the elemental distributions in incineration bottom ashes in relation to their mining influence factors, which are the indices for human use of the elements. 相似文献
934.
Ortiz J 《Environmental management》2003,31(3):0355-0364
The issue of solid waste management in Indian country is multidimensional in scope because it affects more than just regulatory
concerns. There are more than 550 federally recognized Alaska Native and American Indian Tribes in the United States. Tribes
are sovereign nations that have a special relationship to the federal government and a unique legal status. The environmental
problems faced by tribes are many, and it is only fair that tribes, as sovereigns, specify the levels of protection on their
lands.
The one-size-fits-all regulatory approach to environmental problems and solid waste management in particular does not work
and often leads to conflict between tribes and the federal and state governments. Inherent tensions also exist between tribes
and various levels of government concerning jurisdiction of lands and managing solid waste. These intergovernmental relationships
are often complex and present unique challenges to all.
More research needs to be done on targeting resources to meet the capacity-building needs of tribes, as well as the overall
environmental management needs of Indian country under the federal trust obligation. Successful intergovernmental relationships
can be fostered through partnership arrangements between tribes and federal, state, and local governments. In the area of
solid waste such partnerships have worked. It requires that all levels of government deal with tribes with careful consideration
of their cultural, historic, and socioeconomic aspects, which are often intertwined. 相似文献
935.
936.
Environmental monitoring of heavy metals and arsenic from Ag-Pb-Zn mining: a case study over two millennia 总被引:1,自引:0,他引:1
2000 years of mining activity at Wiesloch, Germanyleft behind a legacy of mining wastes, some of which haveextremely high contents of toxic elements like As, Cd, Tl,Sb, Pb and Zn. To evaluate their long-term impact ondifferent environmental compartments, the detailedenvironmental monitoring presented here focused on themineralogical and chemical characterization of thedifferent waste materials, consisting of dumpings with orefragments, flotation tailings and medieval metallurgicalslags. Leaching experiments with these materials, usingeluents of different compositions and pHs were carried outto assess the conditions governing the mobilization and re-fixation of these species. It was shown, that the carbonatehost rock of the mineralization, the loess blanket coveringthe area and the organically rich municipal sewage sludgesdeposited on top of the tailings, represent potentialbarriers to the dispersion of toxic elements over a muchlarger area. Moreover, particulate emissions from thesteep, unvegetated escarpments of the tailing heapsrepresent a continuous thread to the environment. 相似文献
937.
Aysen Müezzino
lu 《Journal of Cleaner Production》1998,6(3-4)
Cotton textile manufacturing operations cause air pollution. Air pollutants are generated by fossil fuel fired combustors due to their flues and/or a variety of chemicals in use for production. Excessive use of chemicals can be stopped or minimized by replacing them or by optimizing the production processes. Energy and water conservation are important goals in textile workplaces as well. There is substantial research and development to minimize pollution potentials of textile operations. In this paper air polluting potentials of cotton textile manufacturing operations are discussed and some quantitative examples are given for evaluating the risks to the environment. Studied impacts to environment cover direct discharges into the ambient air as well as the workplace atmosphere. Further studies are recommended for minimizing the impacts to the local and global air quality due to cotton textile production facilities. 相似文献
938.
Four Illinois communities with different sociode-mographic compositions and at various stages of planning for solid waste
management were surveyed to determine the influence of sociodemographic variables and planning stages on the factors that
motivate recycling behavior. A factor analysis of importance ratings of reasons for recycling and for not recycling yielded
five factors interpreted as altruism, personal inconvenience, social influences, economic incentives, and household storage.
The four communities were shown to be significantly different in multivariate analyses of the five motivational factors. However,
attempts to explain these community differences with regression analyses, which predicted the motivational factors with dummy
codes for planning stages, a measure of self-reported recycling behavior, and sociodemographic measures were unsatisfactory.
Contrary to expectation, the solid waste management planning stages of the cities (curbside pickup, recycling dropoff center,
and planning in progress) contributed only very slightly to the prediction of motivational factors for recycling. Community
differences were better explained by different underlying motivational structures among the four communities. Altruistic reasons
for recycling (e.g., conserving resources) composed the only factor which was similar across the four communities. This factor
was also perceived to be the most important reason for recycling by respondents from all four communities. The results of
the study supported the notion that convenient, voluntary recycling programs that rely on environmental concern and conscience
for motivation are useful approaches to reducing waste. 相似文献
939.
Gross pathologies were recorded in a total of 5942 individual common dab (Limanda limanda L.) at 5 sites in and around Dutch coastal waters, in spring, from 1986 to 1988. Two of these sites (an offshore dumping ground and an inshore site influenced by direct river discharge) received large quantities of diluted acids of titanium dioxide waste (TDW); the other three were selected as reference sites for comparison.
The main diseases recorded were epidermal hyperplasia/papilloma, lymphocystis, liver nodules (pre-neoplastic and neoplastic lesions), and infections caused by the protozoan Glugea sp. Frequencies of disease were analysed using a logit model. There was a consistently high prevalence of epidermal hyperplasia/papilloma in dab from the two sites that received TDW when compared to the other sites. However, no dear relationships were found between the prevalence of epidermal hyperplasia/papilloma and dumping-associated heavy metals or other relevant environmental and biological factors. No significant spatial trend was revealed for liver nodules, although there was a statistically significant association between the occurrence of epidermal hyperplasia/papilloma or of lymphocystis and that of liver nodules in individual fish. Prevalences of lymphocystis were usually higher at offshore sites than in inshore areas, while prevalences of Glugea showed the opposite trend.
Although at first sight the pattern of disease prevalence would appear to furnish a strong case for a cause-and-effect relationship between TDW and epidermal hyperplasia/papilloma, interpretation of the data is complicated by interference from riverine inputs, long-distance dispersion of discharged wastes, local hydrographic conditions, and possible local migration of dab. On the basis of present results, therefore, the possibility that discharges of TDW contributed to the occurrence of this disease cannot be proven or discounted. 相似文献
The main diseases recorded were epidermal hyperplasia/papilloma, lymphocystis, liver nodules (pre-neoplastic and neoplastic lesions), and infections caused by the protozoan Glugea sp. Frequencies of disease were analysed using a logit model. There was a consistently high prevalence of epidermal hyperplasia/papilloma in dab from the two sites that received TDW when compared to the other sites. However, no dear relationships were found between the prevalence of epidermal hyperplasia/papilloma and dumping-associated heavy metals or other relevant environmental and biological factors. No significant spatial trend was revealed for liver nodules, although there was a statistically significant association between the occurrence of epidermal hyperplasia/papilloma or of lymphocystis and that of liver nodules in individual fish. Prevalences of lymphocystis were usually higher at offshore sites than in inshore areas, while prevalences of Glugea showed the opposite trend.
Although at first sight the pattern of disease prevalence would appear to furnish a strong case for a cause-and-effect relationship between TDW and epidermal hyperplasia/papilloma, interpretation of the data is complicated by interference from riverine inputs, long-distance dispersion of discharged wastes, local hydrographic conditions, and possible local migration of dab. On the basis of present results, therefore, the possibility that discharges of TDW contributed to the occurrence of this disease cannot be proven or discounted. 相似文献
940.
我国固体废物处理利用行业发展分析 总被引:2,自引:0,他引:2
中国环境保护产业协会固体废物处理利用委员会 《中国环保产业》2004,(12):34-36
本文介绍了我国固体废物处理行业现状以及业内新技术开发、市场发展及骨干企业状况。 相似文献