全文获取类型
收费全文 | 51873篇 |
免费 | 1180篇 |
国内免费 | 5694篇 |
专业分类
安全科学 | 2063篇 |
废物处理 | 2544篇 |
环保管理 | 5876篇 |
综合类 | 15696篇 |
基础理论 | 12370篇 |
环境理论 | 13篇 |
污染及防治 | 13329篇 |
评价与监测 | 3149篇 |
社会与环境 | 2836篇 |
灾害及防治 | 871篇 |
出版年
2023年 | 361篇 |
2022年 | 995篇 |
2021年 | 927篇 |
2020年 | 731篇 |
2019年 | 694篇 |
2018年 | 1474篇 |
2017年 | 1536篇 |
2016年 | 1682篇 |
2015年 | 1413篇 |
2014年 | 2053篇 |
2013年 | 3999篇 |
2012年 | 2469篇 |
2011年 | 3255篇 |
2010年 | 2543篇 |
2009年 | 2591篇 |
2008年 | 2991篇 |
2007年 | 3019篇 |
2006年 | 2197篇 |
2005年 | 1761篇 |
2004年 | 1514篇 |
2003年 | 1607篇 |
2002年 | 1516篇 |
2001年 | 1577篇 |
2000年 | 1302篇 |
1999年 | 914篇 |
1998年 | 698篇 |
1997年 | 743篇 |
1996年 | 696篇 |
1995年 | 694篇 |
1994年 | 604篇 |
1993年 | 520篇 |
1992年 | 527篇 |
1991年 | 473篇 |
1990年 | 494篇 |
1989年 | 411篇 |
1988年 | 396篇 |
1987年 | 336篇 |
1986年 | 332篇 |
1985年 | 308篇 |
1984年 | 360篇 |
1983年 | 318篇 |
1982年 | 366篇 |
1981年 | 319篇 |
1980年 | 247篇 |
1979年 | 279篇 |
1978年 | 257篇 |
1977年 | 219篇 |
1974年 | 235篇 |
1973年 | 220篇 |
1972年 | 220篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Wang Chunbo Cai Qijia Li Yang Tian Cuicui Wu Xingqiang Huang Yuhong Xiao Bangding 《Environmental science and pollution research international》2021,28(31):42082-42092
Environmental Science and Pollution Research - A mechanical harvesting technology based on coupling flocculation with a rotary drum filter (RDF, 35-μm) was applied to remove cyanobacterial... 相似文献
2.
Li Ying Rong Yanyu Ahmad Umme Marium Wang Xiaotong Zuo Jian Mao Guozhu 《Environmental science and pollution research international》2021,28(34):46196-46214
Environmental Science and Pollution Research - Buildings account for nearly 2/5ths of global energy expenditure. Due to this figure, the 90s witnessed the rise of green buildings (GBs) that were... 相似文献
3.
Liu Xin Li Shunlong 《Environmental science and pollution research international》2021,28(46):65200-65215
Environmental Science and Pollution Research - Growing environmental pressure urges China to develop in a sustainable and low carbon way, and thus China strives to achieve a carbon peak by 2030 and... 相似文献
4.
Zhu Rong Wang Shixin Srinivasakannan C. Li Shiwei Yin Shaohua Zhang Libo Jiang Xiaobin Zhou Guoli Zhang Ning 《Environmental Chemistry Letters》2023,21(3):1611-1626
Environmental Chemistry Letters - The demand for lithium is growing rapidly with the increase in electric vehicles, batteries and electronic equipments. Lithium can be extracted from brines, yet... 相似文献
5.
Russian Journal of Ecology - In this paper, Ellenberg’s indicator values were estimated in order to soil nitrogen (N), pH (R) and soil moisture (M) in different subalpine grassland... 相似文献
6.
Yang Jian Hong Chen Xing Yi Zheng Zixuan Li Zaixing Zhao Xiumei Qi Chenhao 《Environmental science and pollution research international》2021,28(7):7621-7635
Environmental Science and Pollution Research - Hydrothermal liquefaction (HTL) of biomass used HTL reaction under high temperature and pressure to produce bio-oil. This technology is considered as... 相似文献
7.
Journal of Material Cycles and Waste Management - The iron ore tailing (IOT) is an industrial waste, in which large accumulations represent a serious environmental threat. To reduce the... 相似文献
8.
Helena Wedin Ellinor Niit Zaheer Ahmad Mansoor Anna Rúna Kristinsdottir Hanna de la Motte Christina Jönsson Åsa Östlund Christofer Lindgren 《Journal of Polymers and the Environment》2018,26(9):3603-3612
The chemical recycling of cellulosic fibres may represent a next-generation fibre–fibre recycling system for cotton textiles, though remaining challenges include how to accommodate fibre blends, dyes, wrinkle-free finishes, and other impurities from finishing. These challenges may disrupt the regeneration process steps and reduce the fibre quality. This study examines the impact on regenerated viscose fibre properties of a novel alkaline/acid bleaching sequence to strip reactive dyes and dimethyloldihydroxyethyleneureas (DMDHEU) wrinkle-free finish from cotton textiles. Potentially, such a bleaching sequence could advantageously be integrated into the viscose process, reducing the costs and environmental impact of the product. The study investigates the spinning performance and mechanical properties (e.g., tenacity and elongation) of the regenerated viscose fibres. The alkaline/acid bleaching sequence was found to strip the reactive dye and DMDHEU wrinkle-free finish from the cotton fabric, so the resulting pulp could successfully be spun into viscose fibres, though the mechanical properties of these fibres were worse than those of commercial viscose fibres. This study finds that reactive dyes and DMDHEU wrinkle-free finish affect the viscose dope quality and the regeneration performance. The results might lead to progress in overcoming quality challenges in cellulosic chemical recycling. 相似文献
9.
Simas Angélica Mores Rúbia Steffens Juliana Dallago Rogério Marcos Kunz Airton Michelon William Fongaro Gislaine Viancelli Aline 《Environmental Chemistry Letters》2019,17(1):495-499
Environmental Chemistry Letters - Swine production generates large volumes of wastewater, rich in organic matter, nutrients and pathogens. Electrodisinfection is used to remove organic matter and... 相似文献
10.
Shu-Yii Wu Yong-Fang Liu Ya-Chieh Li Chun-Min Liu 《International Journal of Green Energy》2015,12(10):1025-1030
The CO2 absorption capacities of potassium glycinate, potassium sarcosinate (choline, proline), mono-ethanolamine (MEA), and tri-ethanolamine were evaluated to find the optimal absorbent for separating CO2 from gaseous products by a CO2 purification process. The absorption loading, desorption efficiency, cost, and environmental tolerance were assessed to select the optimal absorbent. MEA was found to be the optimum absorbent for separating the CO2 and H2 mixture in gaseous product. The maximum absorption loading rate was 0.77 mol CO2 per mol MEA at temperature of 20°C and absorbent concentration of 2.5 mol/L, whereas desorption efficiency was 90% by heating for 3 h at 130°C. MEA was found to be an optimal absorbent for the purification process of CO2 during gaseous production. 相似文献