全文获取类型
收费全文 | 337篇 |
免费 | 17篇 |
国内免费 | 142篇 |
专业分类
安全科学 | 36篇 |
废物处理 | 25篇 |
环保管理 | 20篇 |
综合类 | 153篇 |
基础理论 | 59篇 |
污染及防治 | 164篇 |
评价与监测 | 10篇 |
社会与环境 | 7篇 |
灾害及防治 | 22篇 |
出版年
2023年 | 4篇 |
2022年 | 14篇 |
2021年 | 13篇 |
2020年 | 10篇 |
2019年 | 8篇 |
2018年 | 14篇 |
2017年 | 16篇 |
2016年 | 16篇 |
2015年 | 22篇 |
2014年 | 21篇 |
2013年 | 37篇 |
2012年 | 40篇 |
2011年 | 28篇 |
2010年 | 23篇 |
2009年 | 15篇 |
2008年 | 22篇 |
2007年 | 19篇 |
2006年 | 21篇 |
2005年 | 26篇 |
2004年 | 9篇 |
2003年 | 24篇 |
2002年 | 13篇 |
2001年 | 22篇 |
2000年 | 12篇 |
1999年 | 9篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1986年 | 2篇 |
1933年 | 1篇 |
排序方式: 共有496条查询结果,搜索用时 109 毫秒
11.
Hu Xiaobing Wang Kun Chang Jing Zhang Lin Zhong Meiying Nie Yong 《Environmental science and pollution research international》2021,28(14):17084-17097
Environmental Science and Pollution Research - Microfaunal identification and analysis are very complex; thus, an image analysis method was utilized in this paper to overcome the shortcomings of... 相似文献
12.
13.
The optical beam deflection method was applied to study the effects of acid solution on both a terrestial and aquatic plants Egeria and Cerastium, which are common aquatic plant and terrestial weed respectively. A probe beam from a He-Ne laser was passed through a vicinity of a leaf of the plants, which were put in culture dishes filled with acid solutions. Deflection signals of the probe beam were monitored and compared for acid solutions with different pH values. The results of Egria showed that the deflection signals changed dramatically when pH values of acid solutions were 2.0 and 3.0, while little at pH of 4.0 and 5.0. For Cerastium when pH were below 3.0, deflection signals changed greatly with time at the begining. After a certain period of time, deflection signals changed little with time. When pH value was above 4.0, deflection signals of Cerastium were still changing with time even after 20 hours. The results suggested that the damage threshold of pH was between 3.0 and 4.0 for both the land and aquatic plants. 相似文献
14.
2009年2月,国务院发布《废弃电器电子产品回收处理管理条例》,成为我国废弃电器电子产品回收处理的纲领性文件。在《废弃电器电子产品处理目录(第一批)》中,明确将电视机、电冰箱、洗衣机、房间空调器、微型计算机等5种产品纳入第一批目录。同时,为了为了能够及时、客观地与经济发展、技术进步以及电器电子产品行业的发展变化等相适应,《目录》管理委员会起草了《制订和调整废弃电器电子产品处理目录的若干规定》,明确随着经济发展变化及电子产品废弃形势调整电器电子产品处理目录的原则。废弃电池在近几年来在我国增长速度很大,将来的管理形势十分紧迫。本文在此分析我国几种废弃电池(铅酸电池、镍氢电池及锂电池)的产生量、再生处理处置情况及管理政策导向。并在目录一批筛选原则的基础上利用权重分析法,筛选评估废弃电池能否进入废弃电器电子产品处理目录(第二批)管理的可能,研究显示铅酸电池已具备进入管理目录的资质。 相似文献
15.
16.
17.
Baisheng Nie Xin Huang Fei Xue Jiang Chen Xiaobing Liu Yangyang Meng 《International journal of occupational safety and ergonomics》2018,24(2):268-277
In order to enhance Chinese workers’ occupational safety awareness, it is essential to learn from developed countries’ experiences. This article investigates thoroughly occupational safety and health (OSH) in China and the UK; moreover, the article performs a comparison of Chinese and British OSH training-related laws, regulations and education system. The following conclusions are drawn: China’s work safety continues to improve, but there is still a large gap compared with the UK. In China a relatively complete vocational education and training (VET) system has been established. However, there exist some defects in OSH. In the UK, the employer will not only pay attention to employees’ physiological health, but also to their mental health. The UK’s VET is characterized by classification and grading management, which helps integrate OSH into the whole education system. China can learn from the UK in the development of policies, VET and OSH training. 相似文献
18.
Anna Korre Zhenggang Nie Sevket Durucan 《International Journal of Greenhouse Gas Control》2010,4(2):289-300
Due to its compatibility with the current energy infrastructures and the potential to reduce CO2 emissions significantly, CO2 capture and geological storage is recognised as one of the main options in the portfolio of greenhouse gas mitigation technologies being developed worldwide. The CO2 capture technologies offer a number of alternatives, which involve different energy consumption rates and subsequent environmental impacts. While the main objective of this technology is to minimise the atmospheric greenhouse gas emissions, it is also important to ensure that CO2 capture and storage does not aggravate other environmental concerns. This requires a holistic and system-wide environmental assessment rather than focusing on the greenhouse gases only. Life Cycle Assessment meets this criteria as it not only tracks energy and non-energy-related greenhouse gas releases but also tracks various other environmental releases, such as solid wastes, toxic substances and common air pollutants, as well as the consumption of other resources, such as water, minerals and land use. This paper presents the principles of the CO2 capture and storage LCA model developed at Imperial College and uses the pulverised coal post-combustion capture example to demonstrate the methodology in detail. At first, the LCA models developed for the coal combustion system and the chemical absorption CO2 capture system are presented together with examples of relevant model applications. Next, the two models are applied to a plant with post-combustion CO2 capture, in order to compare the life cycle environmental performance of systems with and without CO2 capture. The LCA results for the alternative post-combustion CO2 capture methods (including MEA, K+/PZ, and KS-1) have shown that, compared to plants without capture, the alternative CO2 capture methods can achieve approximately 80% reduction in global warming potential without a significant increase in other life cycle impact categories. The results have also shown that, of all the solvent options modelled, KS-1 performed the best in most impact categories. 相似文献
19.
Zhiqiang Nie Qingqi Die Yufei Yang Zhenwu Tang Qi Wang Qifei Huang 《Environmental science and pollution research international》2014,21(13):7863-7875
Polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/PCDF) were overall measured and compared in ambient air, water, soils, and sediments along the upper reaches of the Haihe River of North China, so as to evaluate their concentrations, profiles, and to understand the processes of gas–particle partitioning and air–water/soil exchange. The following results were obtained: (1) The average concentrations (toxic equivalents, TEQs) of 2,3,7,8-PCDD/PCDF in air, water, sediment, and soil samples were 4,855 fg/m3, 9.5 pg/L, 99.2 pg/g dry weight (dw), and 56.4 pg/g (203 fg TEQ/m3, 0.46 pg TEQ/L, 2.2 pg TEQ/g dw, and 1.3 pg TEQ/g, respectively), respectively. (2) Although OCDF, 1,2,3,4,6,7,8-HpCDF, OCDD, and 1,2,3,4,6,7,8-HpCDD were the dominant congeners among four environmental sinks, obvious discrepancies of these congener and homologue patterns of PCDD/PCDF were observed still. (3) Significant linear correlations for PCDD/PCDF were observed between the gas–particle partition coefficient (K p) and the subcooled liquid vapor pressure (P L 0) and octanol–air partition coefficient (K oa). (4) Fugacity fraction values of air–water exchange indicated that most of PCDD/PCDF homologues were dominated by net volatilization from water into air. The low-chlorinated PCDD/PCDF (tetra- to hexa-) presented a strong net volatilization from the soil into air, while high-chlorinated PCDD/PCDF (hepta- to octa-) were mainly close to equilibrium for air–soil exchange. 相似文献
20.
采用十二烷基多糖苷季铵盐作为改性剂制备改性膨润土,研究了改性膨润土联合混凝剂去除有机物的效果,考察了有机改性剂用量、微波辐射功率、辐射时间、膨润土投加量、pH值对有机物去除效果的影响,探讨了改性膨润土的改性和去除机理。结果表明,经微波改性后,实现了十二烷基多糖苷季铵盐阳离子对膨润土的插层,增大了层间距,提高了膨润土的吸附性能。联合混凝剂投加改性膨润土能够改善絮凝性能,显著提高有机物的去除效果。在最佳条件下,改性膨润土与PAC联合后的强化混凝,对初始浓度15.3 mg/L的微污染水中有机物的去除率达到95%以上,吸附符合Freundlich吸附等温方程。 相似文献