全文获取类型
| 收费全文 | 878篇 |
| 免费 | 241篇 |
| 国内免费 | 83篇 |
学科分类
| 环境安全 | 1202篇 |
出版年
| 2025年 | 1篇 |
| 2024年 | 10篇 |
| 2023年 | 24篇 |
| 2022年 | 38篇 |
| 2021年 | 40篇 |
| 2020年 | 27篇 |
| 2019年 | 27篇 |
| 2018年 | 33篇 |
| 2017年 | 36篇 |
| 2016年 | 44篇 |
| 2015年 | 57篇 |
| 2014年 | 56篇 |
| 2013年 | 90篇 |
| 2012年 | 68篇 |
| 2011年 | 55篇 |
| 2010年 | 37篇 |
| 2009年 | 43篇 |
| 2008年 | 55篇 |
| 2007年 | 35篇 |
| 2006年 | 43篇 |
| 2005年 | 24篇 |
| 2004年 | 25篇 |
| 2003年 | 16篇 |
| 2002年 | 25篇 |
| 2001年 | 29篇 |
| 2000年 | 29篇 |
| 1999年 | 31篇 |
| 1998年 | 31篇 |
| 1997年 | 21篇 |
| 1996年 | 21篇 |
| 1995年 | 24篇 |
| 1994年 | 25篇 |
| 1993年 | 17篇 |
| 1992年 | 18篇 |
| 1991年 | 6篇 |
| 1990年 | 10篇 |
| 1989年 | 4篇 |
| 1988年 | 5篇 |
| 1987年 | 3篇 |
| 1986年 | 7篇 |
| 1985年 | 1篇 |
| 1984年 | 6篇 |
| 1983年 | 1篇 |
| 1981年 | 4篇 |
排序方式： 共有1202条查询结果，搜索用时 15 毫秒
91.
Huang Shaojian Dai Chunhao Zhou Yaoyu Peng Hui Yi Kexin Qin Pufeng Luo Si Zhang Xiaoshan 《Environmental science and pollution research international》2018,25(17):16548-16566
Environmental Science and Pollution Research - Plant leaves play a key role in the accumulation of PAHs, as they are able to capture PAHs from the air. In this paper, the mechanism, including... 相似文献
92.
Trung Huu Bui Choonsoo Kim Sung Pil Hong Jeyong Yoon 《Environmental science and pollution research international》2017,24(31):24235-24242
Recently, nano zero-valent iron (nZVI) has emerged as an effective adsorbent for the removal of arsenic from aqueous solutions. However, its use in various applications has suffered from reactivity loss resulting in a decreased efficiency. Thus, the aim of this study was to develop an effective arsenic adsorbent as a core/shell structural nZVI/manganese oxide (or nZVI/Mn oxide) to minimize the reactivity loss of the nZVI. As the major result, the arsenic adsorption capacities of the nZVI/Mn oxide for As(V) and As(III) were approximately two and three times higher than that of the nZVI, respectively. In addition, the As(V) removal efficiency of the nZVI/Mn oxide was maintained through 4 cycles of regeneration whereas that of the nZVI was decreased significantly. The enhanced reactivity and reusability of the nZVI/Mn oxide can be successfully explained by the synergistic interaction of the nZVI core and manganese oxide shell, in which the manganese oxides participate in oxidation reactions with corroded Fe2+ and subsequently retard the release of aqueous iron providing additional surface sites for arsenic adsorption. In summary, this study reports the successful fabrication of a core/shell nZVI/Mn oxide as an effective adsorbent for the removal of arsenic from aqueous solutions. 相似文献
93.
Thermal and Mechanical Properties of Polyurethane Rigid Foam Based on Epoxidized Soybean Oil 总被引：2，自引：0，他引：2
Li-Ting Yang Cheng-Shan Zhao Chun-Lan Dai Li-Yu Fu Shao-Quan Lin 《Journal of Polymers and the Environment》2012,20(1):230-236
A soypolyol based on epoxidized soybean oil (ESO) was prepared in the presence of HBF4 and diethanolamine (DEA) was used as ring opener. A series of polyurethane rigid foam were prepared by mixing polyol with
TDI using an isocyanate index of 1.1. The polyol used in this paper were a mixture of soypolyol and a commercial PL-5601 polyester
polyol and the mass fraction of PL-5601 was in the range of 0–60%. The thermal properties of the resins were characterized
by DSC and TG. The results showed that these rigid foams possess high thermal stability. There were two glass transition temperature
of each foam and Tg1 was increasing with the increasing of OH value. The compression strength of the foam was also recorded, and the effect of
mass ratio of soypolyol and PL-5601 polyester polyol on the compression strength was discussed. 相似文献
94.
混汞法是一种设备简单、操作简便且应用历史悠久的提金方法 ,在世界范围内得到了普遍使用 ,同时也导致了严重的汞污染。本文介绍了混汞法的流程以及汞的释放过程和释放因子 ;综述了应用混汞法提金的不同国家和地区 ,对由此引发的大气、水体、生物 (包括人体 )和土壤汞污染的研究现状 ,并讨论了采金地区的环境管理政策 相似文献
95.
Bui Huyen Boutouil Mohamed Sebaibi Nassim Levacher Daniel 《Journal of Material Cycles and Waste Management》2022,24(4):1295-1303
Journal of Material Cycles and Waste Management - This study aims at investigation of the effects of incorporating natural fibres and two types of cement [ordinary Portland cement and calcium... 相似文献
96.
Abstact Ecological city is the advanced mode of harmonious development of city. Constant improvement is being made in the development of ecological city. However, building ecological city is an enormous project that calls for a huge amount of capital. The government fund is far from adequate. This paper probes into the fund issue and discusses in detail the mechanism of investment and financing in building ecological city from various aspects such as diversification of the investment subjects and the modes of financing. 相似文献
97.
Abstract There is an obvious departure from the regional equilibrium of developments between the upper and lower reaches of the Pearl River in Guangdong, which resulted in “the effects of contra-geography-grads development”. It is mainly because the upriver mountainous areas have been deeply stuck in industrialization delay and marginalization plights, so that nearly 40 million local people have conceived a dream to get rid of “the vicious circle of poverty” by speeding up industrial development. But the problem is that such industrialization efforts on a large scale in mountainous areas are encountering the bottleneck of environmental capacity that strictly limits industrial emissions along the upper reaches of any water system. As a solution, an institutional arrangement called “the Local Area Quotas for Industrial Emis-sions along the Pearl River” is put forward supposed to give corresponding compensation to the rights of industrial development yielded by some areas with lower environmental capacity through the distribution and trading of IDQs. 相似文献
98.
ＴＯＸＩ模型是美国环保局的ＷＡＳＰ（水质分析模拟程序）中的一部分。由于该模型考虑了污染物质在河流中溶解态,颗粒态和底泥态的分布关系,对于模拟重金属在河流中的浓度变化效果较好。为保证计算结果的可靠性,首先应对重金属浓度的衰减变化特性进行研究,本文重点讨论的是重金属在河流中迁移转化的过程,并如何将这一过程用数学公式来进行模拟。 相似文献
99.
头盔式面罩和头带式面罩性能的比较：头盔式面罩具有佩戴容易、气密性好。工艺简单，但舒适性差，视野不如头带式面罩好等特点；头带式面罩具有舒适性好，视野宽阔，但工艺较复杂，佩戴不易气密等特点。 相似文献
100.
本文通过实验的方法,对1#滤毒罐防护范围进行了探讨,说明1#罐不仅能防护CNCL、HCN,对苯、SO2等毒剂也能起到有效的防护作用,同时提出了如何选择滤毒罐的建议。 相似文献
