全文获取类型
收费全文 | 621篇 |
免费 | 37篇 |
国内免费 | 251篇 |
专业分类
安全科学 | 39篇 |
废物处理 | 34篇 |
环保管理 | 59篇 |
综合类 | 342篇 |
基础理论 | 130篇 |
污染及防治 | 189篇 |
评价与监测 | 41篇 |
社会与环境 | 41篇 |
灾害及防治 | 34篇 |
出版年
2023年 | 9篇 |
2022年 | 33篇 |
2021年 | 27篇 |
2020年 | 21篇 |
2019年 | 24篇 |
2018年 | 31篇 |
2017年 | 36篇 |
2016年 | 29篇 |
2015年 | 36篇 |
2014年 | 30篇 |
2013年 | 54篇 |
2012年 | 50篇 |
2011年 | 56篇 |
2010年 | 52篇 |
2009年 | 37篇 |
2008年 | 42篇 |
2007年 | 45篇 |
2006年 | 41篇 |
2005年 | 23篇 |
2004年 | 23篇 |
2003年 | 22篇 |
2002年 | 32篇 |
2001年 | 29篇 |
2000年 | 31篇 |
1999年 | 11篇 |
1998年 | 16篇 |
1997年 | 9篇 |
1996年 | 10篇 |
1995年 | 9篇 |
1994年 | 13篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 9篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有909条查询结果,搜索用时 250 毫秒
151.
Yuanhang Zhang Yuesi Wang Xin Jin Zirui Liu Gehui Wang Guiqian Tang Keding Lu Bo Hu Shanshan Wang Guohui Li Xinqin An Chao Wang Qihou Hu Lingyan He Fenfen Zhang 《环境科学学报(英文版)》2023,123(1):350-366
Atmospheric oxidizing capacity (AOC) is an essential driving force of troposphere chemistry and self-cleaning, but the definition of AOC and its quantitative representation remain uncertain. Driven by national demand for air pollution control in recent years, Chinese scholars have carried out studies on theories of atmospheric chemistry and have made considerable progress in AOC research. This paper will give a brief review of these developments. First, AOC indexes were established that represent apparent atmospheric oxidizing ability (AOIe) and potential atmospheric oxidizing ability (AOIp) based on aspects of macrothermodynamics and microdynamics, respectively. A closed study refined the quantitative contributions of heterogeneous chemistry to AOC in Beijing, and these AOC methods were further applied in Beijing-Tianjin-Hebei and key areas across the country. In addition, the detection of ground or vertical profiles for atmospheric OH·, HO2·, NO3· radicals and reservoir molecules can now be obtained with domestic instruments in diverse environments. Moreover, laboratory smoke chamber simulations revealed heterogeneous processes involving reactions of O3 and NO2, which are typical oxidants in the surface/interface atmosphere, and the evolutionary and budgetary implications of atmospheric oxidants reacting under multispecies, multiphase and multi-interface conditions were obtained. Finally, based on the GRAPES-CUACE adjoint model improved by Chinese scholars, simulations of key substances affecting atmospheric oxidation and secondary organic and inorganic aerosol formation have been optimized. Normalized numerical simulations of AOIe and AOIp were performed, and regional coordination of AOC was adjusted. An optimized plan for controlling O3 and PM2.5 was analyzed by scenario simulation. 相似文献
152.
153.
More and more attention has been paid to the aggregation behavior of nanoparticles, but little research has been done on the effect of particle size. Therefore, this study systematically evaluated the aggregation behavior of nano-silica particles with diameter 130–480 nm at different initial particle concentration, pH, ionic strength, and ionic valence of electrolytes. The modified Smoluchowski theory failed to describe the aggregation kinetics for nano-silica particles with diameters less than 190 nm. Besides, ionic strength, cation species and pH all affected fast aggregation rate coefficients of 130 nm nanoparticles. Through incorporating structural hydration force into the modified Smoluchowski theory, it is found that the reason for all the anomalous aggregation behavior was the different structural hydration layer thickness of nanoparticles with various sizes. The thickness decreased with increasing of particle size, and remained basically unchanged for particles larger than 190 nm. Only when the distance at primary minimum was twice the thickness of structural hydration layer, the structural hydration force dominated, leading to the higher stability of nanoparticles. This study clearly clarified the unique aggregation mechanism of nanoparticles with smaller size, which provided reference for predicting transport and fate of nanoparticles and could help facilitate the evaluation of their environment risks. 相似文献
154.
汽车用材料——PA66及其玻璃纤维复合材料在不同介质中的老化行为研究 总被引:1,自引:0,他引:1
在三种介质(二次水,汽油,乙二醇,50℃温度)条件下对PA66及PA66/GF进行95天左右的人工模拟材料在汽车使用环境下的加速试验,对不同老化时间的PA66及PA66/GF试样进行了宏观力学测试及吸湿性测试,并进一步利用示差扫描量热法(DSC),红外光谱及扫描电镜等手段分析老化前后试样的微观结构及组织差异。结合老化前后试样的力学性能变化,揭示了PA66及复合材料的老化规律和机理。实验表明,PA66及PA66/GF在三种介质中拉伸强度呈现下降趋势。其主要机理是介质溶液对试样渗入的结果影响,降低了分子间的相互作用力(范德华力)从而使材料机械性能下降;同时未发现化学作用对材料的力学性能有明显的变化。 相似文献
155.
在全球碳中和的新形势下,欧盟委员会于2021年7月正式提出"碳边境调节机制"(CBAM)立法提案,并计划于2023年起实施。本文在总结立法提案关键要素的基础上,着重分析欧盟CBAM的合法性与合理性,研判可能对我国产生的潜在影响,并从国际国内层面提出对策建议。分析发现,欧盟采取"名义"碳市场的形式,初期将覆盖水泥、电力、化肥、钢铁和铝等5个行业,只核算产品生产过程的直接排放,暂不考虑间接排放,2023—2025年是过渡期,2026年开始正式实施。欧盟CBAM的合法性与合理性面临诸多挑战:不符合世界贸易组织国民待遇原则和最惠国待遇原则,但存在满足关税与贸易总协定例外条款的可能性;违反国际气候治理的共同但有区别的责任原则、公平原则和各自能力原则,也不符合公约关于国际贸易歧视或变相限制的条款;对解决碳泄漏问题和保护本土竞争力的作用有限;产品隐含碳核算和碳价确定是技术难点问题。影响评估发现,欧盟CBAM将使我国受影响部门的对欧出口总额降低11%~13%,出口成本增加1亿~3.05亿美元,其中约四分之三的成本将由钢铁行业承担,对贸易隐含碳的下降作用有待进一步考量;此外,欧盟CBAM将会影响多边国际气候谈判进程,也会对我国经济社会发展、国际贸易、产业转型、技术提升等方面产生间接影响。我国应在国际层面坚定在气候治理多边框架下解决碳泄露问题,探索提出中国方案;积极推进贸易自由化,提升我国贸易优势;加强中欧对话协商,避免CBAM成为中欧"绿色贸易壁垒"。在国内层面稳步加快全国碳排放权交易体系建设,夯实碳排放核算基础能力,加强科学研究与交流合作。 相似文献
156.
Xiujuan Chen Yunqiu Liu Gordon Huang Chunjiang An Renfei Feng Yao Yao Wendy Huang Shuqing Weng 《Frontiers of Environmental Science & Engineering》2022,16(12):153
157.
Shengqi Zhang Chengsong Ye Wenjun Zhao Lili An Xin Yu Lei Zhang Hongjie Sun Mingbao Feng 《Frontiers of Environmental Science & Engineering》2022,16(7):93
158.
Chao Ling Sun Yajun An Zhen Li Juan Wu Weidong Liu Yue Song Jie 《Environmental science and pollution research international》2022,29(11):15999-16005
Environmental Science and Pollution Research - Previous studies have reported regional variations in the relationship between ambient temperature and dermatitis, which therefore remain... 相似文献
159.
Chen Zhikun Feng Qi Yue Rengyu Chen Zhi Moselhi Osama Soliman Ahmed Hammad Amin An Chunjiang 《Environmental science and pollution research international》2022,29(31):46509-46526
Environmental Science and Pollution Research - With the increase in global population, industrialization, and urbanization, waste from construction, renovation, and demolition (CRD) activities has... 相似文献
160.
Zhang Xuyang Liu Ying Chen Xiaoyang Long Linli Su Yongdong Yu Xiaokun Zhang Hongmei Chen Yongchun An Shikai 《Environmental science and pollution research international》2022,29(40):60117-60132
Environmental Science and Pollution Research - The Huainan mining area is rich in coal resources and has sparse vegetation and many collapsed waterways. Large-scale and long-term underground coal... 相似文献