全文获取类型
收费全文 | 1089篇 |
免费 | 49篇 |
国内免费 | 345篇 |
专业分类
安全科学 | 68篇 |
废物处理 | 63篇 |
环保管理 | 92篇 |
综合类 | 559篇 |
基础理论 | 196篇 |
污染及防治 | 360篇 |
评价与监测 | 49篇 |
社会与环境 | 34篇 |
灾害及防治 | 62篇 |
出版年
2023年 | 17篇 |
2022年 | 60篇 |
2021年 | 43篇 |
2020年 | 29篇 |
2019年 | 32篇 |
2018年 | 40篇 |
2017年 | 46篇 |
2016年 | 42篇 |
2015年 | 60篇 |
2014年 | 81篇 |
2013年 | 102篇 |
2012年 | 102篇 |
2011年 | 96篇 |
2010年 | 79篇 |
2009年 | 65篇 |
2008年 | 80篇 |
2007年 | 74篇 |
2006年 | 76篇 |
2005年 | 55篇 |
2004年 | 34篇 |
2003年 | 32篇 |
2002年 | 32篇 |
2001年 | 29篇 |
2000年 | 21篇 |
1999年 | 20篇 |
1998年 | 22篇 |
1997年 | 22篇 |
1996年 | 16篇 |
1995年 | 14篇 |
1994年 | 11篇 |
1993年 | 15篇 |
1992年 | 9篇 |
1991年 | 5篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 2篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1971年 | 1篇 |
1969年 | 1篇 |
1962年 | 1篇 |
排序方式: 共有1483条查询结果,搜索用时 578 毫秒
611.
安全管理体系的计算机辅助审核技术研究 总被引:7,自引:4,他引:3
关于海运公司安全管理体系 (SMS)的现行审核方法 ,难以保证其文件全面符合国际和国内的强制性规定 ,制约了《国际安全管理 (ISM)规则》效能的发挥。为此 ,课题组基于网络环境开发了对 SMS文件的计算机辅助审核技术 ,其主要成果包括 :建立了法规条款与 SMS文件的映射规则 ,使两者迅速匹配 ,以供审核 ;提出了 SMS文件符合法规程度的数学评价方法 ;设计了计算机辅助审核方案。经试审核 ,表明该技术能协助审核员迅速全面地发现 SMS文件对法规的不符合项 ,给出的符合程度定量合理 ,该技术有利于全面提高 SMS文件对法规条款的符合程度 ,从而方便了公司的全面履约。该技术还可用于类似的管理体系。 相似文献
612.
中国自然灾害综合研究的进展 总被引:7,自引:1,他引:6
为了了解我国的灾情总况,研究多国自然灾害的总体特点和规律,提出了我国宏观减灾对策,为此,研究组做了量研究工作,本文从九个方面概述了中国自然灾害综合研究的进展状况。 相似文献
613.
Foo Su Chern Chapman Ian J. Hartnell David M. Turner Andrew D. Franklin Daniel J. 《Environmental science and pollution research international》2020,27(31):38916-38927
Environmental Science and Pollution Research - The application of hydrogen peroxide (H2O2) as a management tool to control Microcystis blooms has become increasingly popular due to its short... 相似文献
614.
Zhang Shengnan Wang Ning Su Limin Xu Xiaoyan Li Chao Qin Weichao Zhao Yuanhui 《Environmental science and pollution research international》2020,27(9):9114-9125
Environmental Science and Pollution Research - Risk assessment of pollutants to humans and ecosystems requires much toxicological data. However, experimental testing of compounds expends a large... 相似文献
615.
Yushan Su Hayley Hung Kenneth A. Brice Ky Su Nick Alexandrou Pierrette Blanchard Elton Chan Ed Sverko Phil Fellin 《Atmospheric environment (Oxford, England : 1994)》2009,43(39):6230-6237
Atmospheric PBDEs were measured on a monthly basis in 2002–2004 at Point Petre, a rural site in the Great Lakes. Average air concentrations were 7.0 ± 13 pg m?3 for Σ14BDE (excluding BDE-209), and 1.8 ± 1.5 pg m?3 for BDE-209. Concentrations of 3 dominant congeners (i.e., BDE-47, 99, and 209) were comparable to previous measurements at remote/rural sites around the Great Lakes, but much lower than those at urban areas. Weak temperature dependence and strong linear correlations between relatively volatile congeners suggest importance of advective inputs of gaseous species. The significant correlation between BDE-209 and 183 implies their transport inputs associated with particles. Particle-bound percentages were found greater for highly brominated congeners than less brominated ones. These percentages increase with decreasing ambient temperatures. The observed gas/particle partitioning is consistent with laboratory measurements and fits well to the Junge–Pankow model. Using air mass back-trajectories, atmospheric transport to Point Petre was estimated as 76% for BDE-47, 67% for BDE-99, and 70% for BDE-209 from west–northwest and southwest directions. During the same time period, similar congener profiles and concentration levels were found at Alert in the Canadian High Arctic. Different inter-annual variations between Point Petre and Alert indicate that emissions from other regions than North America could also contribute PBDEs in the Arctic. In contrast to weak temperature effect at Point Petre, significant temperature dependence in the summertime implies volatilization emissions of PBDEs at Alert. Meanwhile, episodic observations in the wintertime were likely associated with enhanced inputs through long-range transport during the Arctic Haze period. 相似文献
616.
Su Z. Qi Xiao F. Chen Yong Liu Jia Z. Jiang 《Journal of environmental science and health. Part. B》2013,48(7):456-462
Tebuconazole is a chiral triazole fungicide used as raceme in a variety of agricultural applications. Earlier studies showed that tebuconazole is toxic to many non-target aquatic organisms but relative data for tebuconazole enantiomers are lacking. Thus, goal of this study was to evaluate and compare the toxicity of rac- and S-tebuconazole with Daphnia magna at both acute and chronic levels according to Organization for Economic Cooperation and Development (OECD) guidelines 202 and 211 respectively, to provide some guidelines for optimizing chiral pesticides application and management. The exposure concentrations were 0.1, 0.5, 1, 2, 4, 8, 10 mg L?1 for both rac- and S-tebuconazole and their 48-h EC50 values to D. magna were 3.53 (3.32–3.78) and 2.74 (2.33–3.10) mg L?1 respectively, indicating that these both are medium toxic to D. magna with no significant toxicity difference at acute level. In chronic test, <24-h old D. magna were exposed to 0.01, 0.05, 0.10, 0.20, and 0.40 mg L?1 of rac- and S-tebuconazole with one blank and one solvent control for 21 days according to OECD guideline 211. Four developmental (molting rate, days to the 1st and 3rd brood, and body length) and five reproductive (size of the 1st and 3rd brood, number of broods, and number of neonates) parameters for each D. magna were determined. Results showed that both rac- and S-tebuconazole significantly reduced the reproduction and impacted the development of D. magna at concentrations of 0.05 mg L?1 or higher. Furthermore, S-tebuconazole was more toxic than raceme, and the difference between effects on the same parameters induced by rac- and S-tebuconazole was statistically significant. These results demonstrated that the chronic toxicity of S-tebuconazole might be underestimated in general use, and further studies should focus more on the biological behaviors of enantiomers and not just the raceme of tebuconazole and other chiral pesticides in the environment. 相似文献
617.
Acetaminophen (ACT), an analgesic and antipyretic substance, is one of the most commonly detected pharmaceutical compound in surface waters and wastewaters. In this study, fluidized-bed Fenton (FB-Fenton) was used to decompose ACT into its final degradation products. The 1.45-L cylindrical glass reactor had inlet, outlet and recirculating sections. SiO2 carrier particles were supported by glass beads with 2–4 mm in diameter. ACT concentration was determined by high performance liquid chromatography (HPLC). During the first 40 min of reaction, a fast initial ACT removal was observed and the “two-stage” ACT degradation conformed to a pseudo reaction kinetics. The effects of ferrous ion dosage and [Fe2+]/[H2O2] (FH ratio) were integrated into the derived pseudo second-order kinetic model. A reaction pathway was proposed based on the intermediates detected through SPME/GC–MS. The aromatic intermediates identified were hydroquinone, benzaldehydes and benzoic acids while the non-aromatic substances include alcohols, ketones, aldehydes and carboxylic acids. Rapid initial ACT degradation rate can be accomplished by high initial ferrous ion concentration and/or low FH ratio. 相似文献
618.
Yang Mannan Fang Changqing Zeng Huilin Su Jian Cheng Youliang Pei Lu Liu Ming 《Journal of Material Cycles and Waste Management》2022,24(5):1893-1901
Journal of Material Cycles and Waste Management - Porous carbon with a large specific surface area (maximum was 1600 m2/g) was successfully prepared from waste corrugated paper board. The plant... 相似文献
619.
双酚类化合物(bisphenols, BPs)是合成碳酸聚酯、环氧树脂和聚丙烯酸酯等高分子聚合物的主要原料,在商业制造中广泛使用。经过度排放污染环境,并能通过食物链放大作用在动物和人体内蓄积。已经在水体、底泥、室内灰尘、食品以及动物和人体内检测到双酚A(bisphenol A, BPA)及其替代品或衍生物等多种BPs。BPs对性激素、甲状腺素和神经内分泌系统具有干扰效应,能影响机体生殖功能、性腺发育、神经行为和激素依赖性疾病的发展,已经成为危害人体健康的风险因子。多种BPA替代品的内分泌干扰效应甚至比BPA更强,但缺乏全面的内分泌干扰效应评估数据和对作用机制的深入研究。本文对BPs种类来源、污染现状及其内分泌干扰效应进行综述。 相似文献
620.
Balaji-Prasath Barathan Wang Ying Su Yu Ping Hamilton David P. Lin Hong Zheng Luwei Zhang Yong 《Environmental Chemistry Letters》2022,20(5):3133-3152
Environmental Chemistry Letters - The recent rise of red tide harmful algal blooms has induced ecosystem degradation, economic losses, and aquaculture damage, yet little is known on prevention and... 相似文献