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551.
在宜昌环境总体规划(2013-2030)得到市人大批复实施的背景下,为共享环境总体规划生态功能红线、环境质量红线与资源开发红线("三条红线")、为满足提供规划实施与评估有效途径的实际需求,在市信息办及环保局现有业务信息系统现状评价基础上,综合运用GIS、海量空间数据管理、SOA架构、瓦片地图分发、移动GIS等技术,设计开发了宜昌市环境总体规划信息管理与应用系统(V1.0),实现了"三条红线"等相关数据成果的地图展示、查询等精确管理分析以及项目环境影响评价的辅助决策. 相似文献
552.
水解是农药在环境中降解的一条重要途径。为正确评价农药在各种环境条件下的残留行为,有必要系统地研究温度和介质酸碱度对农药水解速率的影响。 相似文献
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554.
Xuejun Long Jun Luo Zhenxing Zhong Yanxu Zhu Chunjie Zhang Jun Wan Haiyan Zhou Beiping Zhang Dongsheng Xia 《Frontiers of Environmental Science & Engineering》2023,17(9):113
555.
文章研究了用Fe(NO3)3NaOH改性的活性炭联合过氧化氢对水溶液中氨苄青霉素钠的处理效果.确定了它们的优化处理条件,并对两者的处理效果作了相应比较。在T=30℃,pH:3.0,青霉素初始浓度为200mg/L条件下,投加5.0g/LFe(N03)3改性活性炭和80mg/LH202,反应120min后,COD、TOC去除率分别可以达到88.5%和77.9%;在T=30℃,pH=70,青霉素200mg/L条件下,投加8.0g/LNaOH改性活性炭和80mg/LH202,反应120rain后,COD、TOC去除率分别可以达到85.2%和76.4%。 相似文献
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557.
Long-term (≥20 years) application of fertilizers and straw return enhances soil carbon storage: a meta-analysis 总被引:2,自引:0,他引:2
Yu’e Li Shengwei Shi Muhammad Ahmed Waqas Xiaoxia Zhou Jianling Li Yunfan Wan Xiaobo Qin Qingzhu Gao Shuo Liu Andreas Wilkes 《Mitigation and Adaptation Strategies for Global Change》2018,23(4):603-619
Increasing soil carbon (C) storage is crucial to addressing climate change and ensuring food security. The C sequestration potential of the world’s cropland soil is 0.4–0.8 Pg soil C year?1, which may be achieved through the adoption of recommended management practices (RMPs), including fertilizer management. This study aimed to quantitatively evaluate the influence of long-term application of different fertilizers and straw retention on soil organic carbon (SOC) storage, to compare the calculated response ratios with Intergovernmental Panel on Climate Change (IPCC)-recommended default relative stock change factors, and to propose recommendations for enhancing SOC sequestration. The meta-analysis indicated that the long-term application of chemical fertilizers (CF), organic fertilizers (OF), combined chemical and organic fertilizers (CFOF), and straw return (SR) significantly enhanced the SOC storage. Response ratios varied significantly (p < 0.05) across different fertilization measures and climatic zones, and was sensitive to the initial SOC content. The mean response ratio was 0.94 for no fertilizer (NF), 1.08 for CF, 1.48 for OF, 1.38 for CFOF, and 1.28 for SR. When IPCC default values for response ratios were applied, SOC storage with OF and CFOF treatments in warm temperate regions with a dry climate was underestimated by 26%, and in the cool temperate region with a moist climate was overestimated by 25% (p < 0.05). Analysis showed that sustained application of organic fertilizers and straw return could be a beneficial measures to mitigate climate change and ensure food security in China. Our findings highlight the importance of deriving SOC stock change factors for a detailed classification of cropland by fertilizer management, climate, and soil types in order to more accurately reflect the effects of policy measures. 相似文献
558.
Source diagnostics of polycyclic aromatic hydrocarbons in urban road runoff, dust, rain and canopy throughfall 总被引:6,自引:0,他引:6
Zhang W Zhang S Wan C Yue D Ye Y Wang X 《Environmental pollution (Barking, Essex : 1987)》2008,153(3):594-601
Diagnostic ratios and multivariate analysis were utilized to apportion polycyclic aromatic hydrocarbon (PAH) sources for road runoff, road dust, rain and canopy throughfall based on samples collected in an urban area of Beijing, China. Three sampling sites representing vehicle lane, bicycle lane and branch road were selected. For road runoff and road dust, vehicular emission and coal combustion were identified as major sources, and the source contributions varied among the sampling sites. For rain, three principal components were apportioned representing coal/oil combustion (54%), vehicular emission (34%) and coking (12%). For canopy throughfall, vehicular emission (56%), coal combustion (30%) and oil combustion (14%) were identified as major sources. Overall, the PAH's source for road runoff mainly reflected that for road dust. Despite site-specific sources, the findings at the study area provided a general picture of PAHs sources for the road runoff system in urban area of Beijing. 相似文献
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560.
<正>高温季节,企业工会通常会为生产一线职工送去各种清凉饮料,但多数职工认为这仅是表面工作,应景行为,工会应从根本上关心职工的劳动保护工作。 相似文献