全文获取类型
收费全文 | 5480篇 |
免费 | 379篇 |
国内免费 | 1309篇 |
专业分类
安全科学 | 376篇 |
废物处理 | 286篇 |
环保管理 | 521篇 |
综合类 | 2590篇 |
基础理论 | 1058篇 |
环境理论 | 1篇 |
污染及防治 | 1537篇 |
评价与监测 | 370篇 |
社会与环境 | 295篇 |
灾害及防治 | 134篇 |
出版年
2024年 | 14篇 |
2023年 | 101篇 |
2022年 | 240篇 |
2021年 | 197篇 |
2020年 | 190篇 |
2019年 | 165篇 |
2018年 | 227篇 |
2017年 | 223篇 |
2016年 | 211篇 |
2015年 | 239篇 |
2014年 | 329篇 |
2013年 | 536篇 |
2012年 | 398篇 |
2011年 | 427篇 |
2010年 | 370篇 |
2009年 | 389篇 |
2008年 | 367篇 |
2007年 | 326篇 |
2006年 | 280篇 |
2005年 | 231篇 |
2004年 | 198篇 |
2003年 | 219篇 |
2002年 | 155篇 |
2001年 | 196篇 |
2000年 | 141篇 |
1999年 | 100篇 |
1998年 | 94篇 |
1997年 | 73篇 |
1996年 | 73篇 |
1995年 | 65篇 |
1994年 | 41篇 |
1993年 | 37篇 |
1992年 | 51篇 |
1991年 | 21篇 |
1990年 | 29篇 |
1989年 | 19篇 |
1988年 | 9篇 |
1987年 | 12篇 |
1986年 | 8篇 |
1985年 | 15篇 |
1984年 | 14篇 |
1983年 | 10篇 |
1982年 | 6篇 |
1981年 | 9篇 |
1980年 | 7篇 |
1979年 | 6篇 |
1975年 | 8篇 |
1974年 | 11篇 |
1973年 | 11篇 |
1972年 | 13篇 |
排序方式: 共有7168条查询结果,搜索用时 880 毫秒
1.
Yan Mi He Lei Prabowo Bayu Fang Zhumin Lin Jie Xu Zhang Hu Yanjun 《Journal of Material Cycles and Waste Management》2018,20(3):1594-1604
Journal of Material Cycles and Waste Management - Efforts to improve the performance of hydrothermal treatment (HT) in producing high-quality solid fuel from sewage sludge were carried out by... 相似文献
2.
采用大肠杆菌吸附-化学还原法,以大肠杆菌(ECCs)为模板、十六烷基三甲基溴化铵为保护剂、抗坏血酸为还原剂,由废含金催化剂制备金纳米线(AuNWs)。采用XRD,SEM,TEM等技术对AuNWs进行表征。研究了AuNWs对罗丹明6G(R6G)和4-巯基苯甲酸(4-MBA)的拉曼散射信号的增强效果。实验结果表明:在制备过程中加入微生物ECCs,可使金回收率提高约20百分点;当溶液pH小于4时,反应2 h后,有大量呈线状的AuNWs聚集沉降,金回收率可达99%1以上。表征结果显示,AuNWs呈多晶结构,晶格间距为0.23 nm。表面增强拉曼散射分析表明,AuNWs对R6G和4-MBA具有良好的拉曼光谱增强性能。 相似文献
3.
Cao Li Li Lin Wu Yi 《Environmental science and pollution research international》2021,28(3):2765-2778
Environmental Science and Pollution Research - China is the most populous country in the world, and the pollution caused by the excessive population should not be underestimated. In recent years,... 相似文献
4.
Fu Li Chen Yi Yang Xinyi Yang Zuyao Liu Sha Pei Lei Feng Baixiang Cao Ganxiang Liu Xin Lin Hualiang Li Xing Ye Yufeng Zhang Bo Sun Jiufeng Xu Xiaojun Liu Tao Ma Wenjun 《Environmental science and pollution research international》2019,26(20):20137-20147
Environmental Science and Pollution Research - Fetal growth has been demonstrated to be an important predictor of perinatal and postnatal health. Although the effects of maternal exposure to air... 相似文献
5.
Dust storms frequently occur in Mongolia and in northern China. Each year there are 30 to 120 dusty days in source regions of Mongolia and 14–20 dusty days on the Korean Peninsula. Intense sand storms and associated dust falls produce environmental impacts in East Asia. This paper discusses the environmental degradation in Mongolia and the social, economic and atmospheric impacts of dust storms in the sink area. The impact of dust storms on environmental compartments as well as their direct and indirect consequences to basic resources like water and energy demand and supply is explained. Governments are encouraged to take appropriate action in specified regions. For monitoring dust storms there is a need for international cooperation to combat growing environmental and human security concerns. 相似文献
6.
7.
8.
介绍了冲击水浴喷雾式除尘器在柳钢焦化厂的应用试验情况,制作安装,调试运行后检测鉴定表明,冲击水浴喷雾式除尘器应用在冶金焦末粉尘上,不但操作简单,维护方便,除尘效率高,效果好,而且成本低廉,只有电除尘器或布袋除尘器的20%左右。 相似文献
9.
Lim KJ Engel BA Tang Z Muthukrishnan S Choi J Kim K 《Journal of environmental management》2006,78(1):35-43
Urbanization can result in alteration of a watershed's hydrologic response and water quality. To simulate hydrologic and water quality impacts of land use changes, the Long-Term Hydrologic Impact Assessment (L-THIA) system has been used. The L-THIA system estimates pollutant loading based on direct runoff quantity and land use based pollutant coefficients. The accurate estimation of direct runoff is important in assessing water quality impacts of land use changes. An automated program was developed to calibrate the L-THIA model using the millions of curve number (CN) combinations associated with land uses and hydrologic soil groups. L-THIA calibration for the Little Eagle Creek (LEC) watershed near Indianapolis, Indiana was performed using land use data for 1991 and daily rainfall data for six months of 1991 (January 1-June 30) to minimize errors associated with use of different temporal land use data and rainfall data. For the calibration period, the Nash-Sutcliffe coefficient was 0.60 for estimated and observed direct runoff. The calibrated CN values were used for validation of the model for the same year (July 1-December 31), and the Nash-Sutcliffe coefficient was 0.60 for estimated and observed direct runoff. The Nash-Sutcliffe coefficient was 0.52 for January 1, 1991 to December 31, 1991 using uncalibrated CN values. As shown in this study, the use of better input parameters for the L-THIA model can improve accuracy. The effects on direct runoff and pollutant estimation of the calibrated CN values in the L-THIA model were investigated for the LEC. Following calibration, the estimated average annual direct runoff for the LEC watershed increased by 34%, total nitrogen by 24%, total phosphorus by 22%, and total lead by 43%. This study demonstrates that the L-THIA model should be calibrated and validated prior to application in a particular watershed to more accurately assess the effects of land use changes on hydrology and water quality. 相似文献
10.