全文获取类型
收费全文 | 1034篇 |
免费 | 115篇 |
国内免费 | 463篇 |
专业分类
安全科学 | 36篇 |
废物处理 | 14篇 |
环保管理 | 114篇 |
综合类 | 830篇 |
基础理论 | 185篇 |
污染及防治 | 248篇 |
评价与监测 | 155篇 |
社会与环境 | 30篇 |
出版年
2024年 | 5篇 |
2023年 | 28篇 |
2022年 | 49篇 |
2021年 | 58篇 |
2020年 | 63篇 |
2019年 | 47篇 |
2018年 | 44篇 |
2017年 | 57篇 |
2016年 | 73篇 |
2015年 | 70篇 |
2014年 | 72篇 |
2013年 | 89篇 |
2012年 | 109篇 |
2011年 | 139篇 |
2010年 | 73篇 |
2009年 | 55篇 |
2008年 | 61篇 |
2007年 | 76篇 |
2006年 | 57篇 |
2005年 | 41篇 |
2004年 | 43篇 |
2003年 | 58篇 |
2002年 | 44篇 |
2001年 | 38篇 |
2000年 | 25篇 |
1999年 | 23篇 |
1998年 | 36篇 |
1997年 | 18篇 |
1996年 | 12篇 |
1995年 | 6篇 |
1994年 | 9篇 |
1993年 | 7篇 |
1992年 | 8篇 |
1991年 | 2篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1981年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有1612条查询结果,搜索用时 625 毫秒
411.
412.
长江口区域饮用水源地有机污染特性研究 总被引:1,自引:0,他引:1
以南通市为例,对长江口区域饮用水源地53种挥发性有机物( VOCs)、64种半挥发性有机物(SVOCs)、33种农药、20种多氯联苯等有机污染物进行定性、定量检测,选取汇龙镇水厂、如皋水厂、海门长江水厂3个水厂水源地进行r枯水期、平水期、丰水期3个水期的监测.结果表明:(1)VOCs中仅在枯水期有四氯化碳检出,33种农... 相似文献
413.
414.
The traditional evaluation of energy consumption mostly introduces pollutants as a negative economic output into evaluating model,ignoring the configuration relationship among the energy input,pollutants as well as economic output.This paper considers the overall process of energy consumption and constructs an evaluation indication system of energy consumption level combined with endogenous pollutants based on entropytopsis method,then makes empirical research.The results show that China’s energy consumption level presents a fluctuant rise in the premise of emission.Energy consumption level depends on the relationship among energy input,pollutants and economic output.The raise of energy consumption level should not increase economic output and reduce pollutant emission at the expense of environment.Finally,the whole paper puts forward the countermeasures to improve the overall level of energy consumption. 相似文献
415.
Exposure to persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), dichlorodiphenyldichloroethane (p,p′-DDE), and hexachlorobenzene (HCB) continues to be of concern due to their ubiquitous distribution and high persistence. Current toxicant body burden is still a primary concern within the Akwesasne Mohawk Nation since other studies conducted within the community have shown relationships between these POPs and endocrine disruption.In this article we describe the levels of these toxicants in young adults of the Akwesasne Mohawk Nation between the ages of 17 and 21 years of age (mean age 18.1 years), and investigate potential influences of their current body burden. Seventeen congeners in fourteen chromatographic peaks were detected in 50% or more of the individuals sampled (geometric mean [GM] of the sum of these congeners = 0.43 ppb). Congeners 118, 138[+163 + 164] and 153 had the highest rate of detection (?98%) within the Akwesasne young adults. Of the other organochlorines, HCB (GM = 0.04 ppb) and p,p′-DDE (GM = 0.38 ppb) were found in 100% and 99% of the sample respectively.Significantly higher levels of PCBs were found among individuals who were breastfed as infants, were first born, or had consumed local fish within the past year. When compared to levels of p,p′-DDE, HCB, and 13 specific congeners reported by the CDC for youth between the ages of 12 and 19 years, the geometric means of several congeners (CBs 99, 105, 110, and 118) among the Akwesasne were higher than the reported CDC 90th percentile. In contrast, levels of CB 28 in Akwesasne young adults were ∼50% or less than those of the CDC cohort. p,p′-DDE and HCB levels were generally higher in the CDC cohort (GM of 0.516 and 0.065 ppb, respectively for Mohawks vs. 2.51 and 0.123, respectively, for CDC). Concentrations of non-persistent PCBs among this sample of Akwesasne young adults were higher than those reported by the CDC suggesting continued exposure, but lower than those associated with severe contamination.Additional research into the concentration trends of individual PCB congeners within Akwesasne youth and young adults is warranted to further improve our insight into the determinants and influences of organochlorine concentrations within members of the Akwesasne community. 相似文献
416.
Effects of hydrodynamics on the distribution of trace persistent organic pollutants and macrobenthic communities in Bohai Bay 总被引:4,自引:0,他引:4
In recent years, the rapid economic development along Bohai Bay, has brought out continuous increasing of the pollution loads in the Bohai Sea, especially by the large coastal reclamation project, Tianjin Binhai New Area. In the period of 2007-2009, we collected the sediments of the main rivers, estuaries, intertidal zone, and near-shore area of Bohai Bay, and Macrobenthos associated with the marine sediments to assess the influence of hydrodynamics in the coastal environment on the pattern of trace contaminants and the macrobenthic community. Based on data derived from these samples, the levels of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) in sediments followed the order PAHs > OCPs > PCBs > PBDEs. The higher concentrations of PCBs, OCPs, PAHs and PBDEs were found in the estuarine and near-shore environment of the Dagu Drainage River. The spatial distribution of OCPs was different to that of PCBs due to the direction of the velocity field of Bohai Bay in its old and new topography, and the higher water-solubility of OCPs than that of PCBs. The results of the Pearson correlation and the PCA indicate that the medium diameter (MD) of sediments was the predominant factor influencing the distribution of PCBs and OCPs, most sampling sites were characterized mainly by TOC of sediments and biomass of macrobenthos. The results indicate that the distribution of trace contaminants and macrobenthic community in Bohai Bay are mainly affected by the hydrodynamic conditions. 相似文献
417.
对废家电所含的污染物种类进行了统计,对其可能对环境和人类产生的污染和危害特性进行了较为详细的分析,提出了对这些污染物的污染防治要领和综合利用途径,进一步提醒人们要对废家电的资源和污染两重性的高度关注。 相似文献
418.
水环境中有机污染物对藻类毒理性的探讨 总被引:2,自引:0,他引:2
近年来,环境中的有机污染物对生态环境的破坏日益加剧,并严重威胁到了人类的生存和发展。藻类作为初级生产者,是整个生态系统物质循环和能量流动的基础,因此研究水环境中有机污染物对藻类的毒理性,对于环境污染的监测具有深远的意义。就有机污染物对藻类的毒性机理、藻类对有机污染物的敏感度等问题的研究现状进行综述,并对藻类在环境监测方面的应用前景进行展望。 相似文献
419.
Fabio Gosetti Michela Bottaro Valentina Gianotti Eleonora Mazzucco Paolo Frascarolo Davide Zampieri Caterina Oliveri Aldo Viarengo Maria Carla Gennaro 《Environmental pollution (Barking, Essex : 1987)》2010,158(2):592-146
This paper studies the degradation reactions that 4-chloroaniline can naturally undergo in waters for the action of sun light. 10.00 mg L−1 4-chloroaniline aqueous solution, without any addition of organic solvent, are undergone to photoirradiation under conditions that simulate sun light. The degradation pathway, followed by HPLC-DAD-MS/MS methods, is complex since the pollutant gives rise to many photoproducts: the predominant species are characterized by m/z values of 217 (P5) and 218 (P6) and are compatible with dimeric structures of 4-chloroaniline. Vibrio fischeri tests indicate that the photoproducts of 4-chloroaniline are characterized by a toxicity level significantly greater than the precursor. 相似文献
420.
Maciej Haranczyk Tomasz Puzyn 《Environmental pollution (Barking, Essex : 1987)》2010,158(8):2786-2789
Congeners are molecules based on the same carbon skeleton but different by the number of substituents and/or a substitution pattern. Various Persistent Organic Pollutants (POPs) exist in the environment as families of halogen substituted congeners and/or their hydroxyl and methoxy substituted derivatives. Numbers of possible congeners resulting from substitution of a parent POP molecule with only one type of chemical group are generally available. At the same time, numbers of mixed-substituent congeners have not been counted and presented yet, although there is an increasing interest in such as is the increasing number of research articles presenting results on already identified Cl−/Br−mixed type congeners and/or their HO-/CH3O-mixed metabolites. We have enumerated and counted possible mixed-substituent congeners of common POPs. This article presents the obtained numbers for congener families of benzene, naphthalene, biphenyl, diphenyl ether, dibenzo-p-dioxin, dibenzofuran, anthracene, pyrene and others and obtained by substitution of up to five chemical group types. 相似文献