全文获取类型
收费全文 | 2895篇 |
免费 | 277篇 |
国内免费 | 996篇 |
专业分类
安全科学 | 354篇 |
废物处理 | 136篇 |
环保管理 | 216篇 |
综合类 | 1890篇 |
基础理论 | 439篇 |
污染及防治 | 752篇 |
评价与监测 | 132篇 |
社会与环境 | 142篇 |
灾害及防治 | 107篇 |
出版年
2024年 | 6篇 |
2023年 | 56篇 |
2022年 | 175篇 |
2021年 | 166篇 |
2020年 | 126篇 |
2019年 | 124篇 |
2018年 | 110篇 |
2017年 | 165篇 |
2016年 | 146篇 |
2015年 | 158篇 |
2014年 | 222篇 |
2013年 | 250篇 |
2012年 | 254篇 |
2011年 | 272篇 |
2010年 | 233篇 |
2009年 | 218篇 |
2008年 | 214篇 |
2007年 | 214篇 |
2006年 | 179篇 |
2005年 | 131篇 |
2004年 | 107篇 |
2003年 | 101篇 |
2002年 | 78篇 |
2001年 | 66篇 |
2000年 | 77篇 |
1999年 | 58篇 |
1998年 | 51篇 |
1997年 | 38篇 |
1996年 | 35篇 |
1995年 | 28篇 |
1994年 | 22篇 |
1993年 | 21篇 |
1992年 | 10篇 |
1991年 | 17篇 |
1990年 | 16篇 |
1989年 | 6篇 |
1988年 | 10篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有4168条查询结果,搜索用时 15 毫秒
971.
972.
973.
974.
Lan-Cui Liu Qi Li Jiu-Tian Zhang Dong Cao 《Mitigation and Adaptation Strategies for Global Change》2016,21(2):191-207
China encourages the demonstration of carbon capture and storage (CCS) projects. In an effort to identify gaps and provide suggestions for environmental risk management of carbon dioxide (CO2) geological storage in China, this article presents a concise overview of potential health, safety and environmental (HSE) risks and environmental management regulations for CO2 geological storage in Australia, Japan, the United States (USA), the European Union (EU), and the United Kingdom (UK). The environmental impact assessment (EIA) experience of Shenhua Ordos Coal-to-Liquid (CTL) Project and PetroChina Jilin Oil Field enhanced oil recovery (EOR) is subsequently analyzed in light of our field investigation, and gaps in current EIA guidelines that are applicable to CO2 geological storage projects are identified. It is found that there are no specific environmental risk regulations suitable for CO2 storage in China, and environmental risk management lags behind the development of CCS technology, which presents a challenge to demonstration enterprises in terms of assessing environmental risk. One major challenge is the overestimation or underestimation of this risk on the part of the enterprise, and another is a lack of applicable regulations for government sectors to supervise the risk throughout CCS projects. Therefore, there is a pressing need for China to formulate environmental management regulations that include environmental risk assessment, mandatory monitoring schemes, environmental emergency plans, and related issues. 相似文献
975.
Sediment-water distribution of perfluorooctane sulfonate (PFOS) in Yangtze River Estuary 总被引:2,自引:0,他引:2
Analysis of Perfluorooctane sulfonate (PFOS) distribution in water and sediment in Yangtze River Estuary showed that the estuary was a sink for PFOS. Salinity was an important parameter in controlling the sediment-water interactions and the fate or transport of PFOS in the aquatic environment. As the salinity (S‰) increased from 0.18 to 3.31, the distribution coefficient (Kd) between sediment and water linearly increased from 0.76 to 4.70 L g−1. The study suggests that PFOS may be carried with the river water and transported for long distances before it reaches to the sea and largely scavenged to the sediment in the estuaries due to the dramatic change in salinity. 相似文献
976.
SUMMARY During the past half century, China has experienced increasingly severe land degradation, soil erosion, and desert expansion. Desertification is affecting one third of China's total territory and the annual accelerating rate of desertification spread is as high as 2460 km2 in China. In 1996, China developed a National Action Programme to Combat Desertification (NAP), which is aimed to apply new legal measures and technical approaches to slow down desertification processes and achieve a long-term goal — control desertification and alleviate poverty through continuous efforts to fight against desertification, stabilize mobile dunes, revegetate degraded rangeland and control soil erosion in arid, semi-arid, and dry sub-humid areas. The long-term and integrated strategies of China's NAP result in encouragement of social participation, legal institutional guarantees, policy making, and establishment of demonstrations/pilot projects to combat desertification at both national and provincial level. 相似文献
977.
978.
979.
C. Andrew James Gang Xin Sharon L. Doty Indulis Muiznieks Lee Newman Stuart E. Strand 《Environmental pollution (Barking, Essex : 1987)》2009,157(8-9):2564-2569
A mass balance study was performed under controlled field conditions to investigate the phytoremediation of perchloroethylene (PCE) by hybrid poplar trees. Water containing 7–14 mg L?1 PCE was added to the test bed. Perchloroethylene, trichloroethylene, and cis-dichloroethylene were detected in the effluent at an average of 0.12 mg L?1, 3.9 mg L?1, and 1.9 mg L?1, respectively. The total mass of chlorinated ethenes in the water was reduced by 99%. Over 95% of the recovered chlorine was as free chloride in the soil, indicating near-complete dehalogenation of the PCE. Transpiration, volatilization, and accumulation in the trees were all found to be minor loss mechanisms. In contrast, 98% of PCE applied to an unplanted soil chamber was recovered as PCE in the effluent water or volatilized into the air. These results suggest that phytoremediation can be an effective method for treating PCE-contaminated groundwater in field applications. 相似文献
980.
施工车辆车轮带泥是我国道路扬尘污染控制面临的共性和突出问题。为在国内推广使用洗轮机提供技术依据,通过检测工地出口外道路积尘负荷来估算转轮式洗轮机对车轮带泥的冲洗效率,并以该洗轮机作为车轮带泥检测设备,检测和统计北京市车轮带泥量。结果表明,(1)转轮式洗轮机可以将工地出口外100m道路积尘负荷增量由64.4g/m2降至5.9g/m2,转轮式洗轮机对车轮带泥的冲洗效率大于90%;(2)渣土车和混凝土车车轮带泥量的平均值分别为5.1和2.2kg/车;(3)北京市未来车轮带泥量将超过8.8万t/a,施工车辆全部经过转轮式洗轮机冲洗后,车轮带泥量可削减7.9万t/a。建议在相关法律法规中以强制性条款落实施工车辆车轮带泥机械化冲洗要求。 相似文献