全文获取类型
收费全文 | 1003篇 |
免费 | 54篇 |
国内免费 | 399篇 |
专业分类
安全科学 | 60篇 |
废物处理 | 63篇 |
环保管理 | 91篇 |
综合类 | 554篇 |
基础理论 | 235篇 |
污染及防治 | 311篇 |
评价与监测 | 31篇 |
社会与环境 | 34篇 |
灾害及防治 | 77篇 |
出版年
2023年 | 17篇 |
2022年 | 58篇 |
2021年 | 45篇 |
2020年 | 30篇 |
2019年 | 31篇 |
2018年 | 53篇 |
2017年 | 48篇 |
2016年 | 50篇 |
2015年 | 75篇 |
2014年 | 85篇 |
2013年 | 103篇 |
2012年 | 97篇 |
2011年 | 97篇 |
2010年 | 69篇 |
2009年 | 65篇 |
2008年 | 70篇 |
2007年 | 64篇 |
2006年 | 41篇 |
2005年 | 44篇 |
2004年 | 20篇 |
2003年 | 27篇 |
2002年 | 28篇 |
2001年 | 28篇 |
2000年 | 26篇 |
1999年 | 27篇 |
1998年 | 23篇 |
1997年 | 21篇 |
1996年 | 24篇 |
1995年 | 24篇 |
1994年 | 12篇 |
1993年 | 11篇 |
1992年 | 10篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 4篇 |
1988年 | 7篇 |
1987年 | 1篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有1456条查询结果,搜索用时 15 毫秒
191.
192.
采用不同形态的PHAs薄膜(聚β-羟基丁酸(PHB)及β-羟基丁酸与β-羟基戊酸的共聚物(PHBV)膜),在各种环境(如土壤和水体)的不同条件下,对膜的生物降解性进行了研究,并对其降解机制作了初步探讨。结果表明:PHAs膜具有生物降解性,在无菌条件下不能被降解;在不同的环境中,如不同土壤和水体,PHAs膜的降解情况不同;不同的条件,如pH、温度,对环境中PHAs膜的降解率有着不同的影响;PHB膜的生物降解速度比PHBV膜快;PHAs膜的厚度对其降解能力有很大影响。 相似文献
193.
194.
Du Jiaxin Waite T. David Feng Jing Lei Yang Tang Wangwang 《Environmental Chemistry Letters》2023,21(2):885-909
Environmental Chemistry Letters - Declining mineral resources, high fertilizer production cost and widespread eutrophication are calling for the recovery of nitrogen and phosphorus from wastewaters... 相似文献
195.
196.
International experience of green development in Western China: an overall review of policy and practice 总被引:1,自引:0,他引:1
Green development emphasizes co-development between economic and environmental dimensions, and is a people-centered sustainable development approach. Western China demands green development, and international experience could provide necessary, unique and important help and support for Western China to achieve its green development goals. This paper has made a comprehensive overall review and analysis of international experience in green development policy and its implementation, in particular, OECD countries’ (mostly Australia and Canada) experience have been analyzed following the major policy foci defined by the Task Force on Strategy and Policies on Environment and Development in Western China initiated by China Council for International Cooperation on Environment and Development (CCICED). Data and information were gathered from the field surveys and investigations, expert meetings, as well as literature review. The main sessions include policy framework and road map establishment, implementation and performance assessment, co-development between economic development and environmental protection, as well as green employment and poverty alleviation. The paper has addressed five policy considerations for the future promotion of green development in Western China. 相似文献
197.
The organic-inorganic hybrid halide compounds have emerged as one of the most promising photoelectric material for their superior optoelectronic properties and hold great prospects for renewable energy substitutes and environmental protection as photocatalysis. Here, we report the optical properties of the Sb-based organic-inorganic hybrid ferroelectric materials: pyridine-4-aminium tetrachloroantimonate ((C5H7N2)SbCl4, sample 1), piperidin-1-aminium tetrachloroantimonate ((C5H13N2)SbCl4, sample 2) and tris(trimethylammonium) nonachlorodiantimonate (((CH3)3NH)3Sb2Cl9, sample 3), which are a kind of exploited efficient photocatalysts. Samples 2 and 3 exhibit distinct photoelectric respond, which are mainly ascribed to their minor narrow band-gap compared with sample 1. For the ferroelectrics, the intrinsic of spontaneous polarization of sample 3 at room temperature is favourable for the separation of photogenerated electrons and holes within the photorespond process. Moreover, sample 3 shows the highest efficiency of photo-decomposed Rhodamine B (90.2% within 80 min) and Methyl Orange (MO) (97.4% within 50 min), thanks to the photo-excited electrons and holes promoting the formation of oxidative radical species during the photo-redox progress. These findings prove that the development of a novel Sb-based organic-inorganic hybrid halide compounds with good stability in the degradation of organic dyes paves a way to designing new photocatalyst. 相似文献
198.
199.
200.
Zou Ziwei Yang Lu Liu Yuan Zhang Yue Cao Dandan Du Ziwen Jin Jie 《Environmental science and pollution research international》2023,30(8):19907-19917
Environmental Science and Pollution Research - The removal and recovery of uranium (VI) from water solutions are critical for energy and environmental security. In this study, hydrochar at 100,... 相似文献