首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   26004篇
  免费   532篇
  国内免费   3926篇
安全科学   1177篇
废物处理   1266篇
环保管理   3130篇
综合类   7622篇
基础理论   6080篇
环境理论   6篇
污染及防治   8121篇
评价与监测   1393篇
社会与环境   1168篇
灾害及防治   499篇
  2023年   218篇
  2022年   586篇
  2021年   518篇
  2020年   387篇
  2019年   412篇
  2018年   576篇
  2017年   677篇
  2016年   870篇
  2015年   902篇
  2014年   1160篇
  2013年   2299篇
  2012年   1338篇
  2011年   1511篇
  2010年   1215篇
  2009年   1171篇
  2008年   1417篇
  2007年   1266篇
  2006年   1148篇
  2005年   868篇
  2004年   866篇
  2003年   869篇
  2002年   785篇
  2001年   947篇
  2000年   731篇
  1999年   526篇
  1998年   488篇
  1997年   458篇
  1996年   449篇
  1995年   420篇
  1994年   386篇
  1993年   340篇
  1992年   351篇
  1991年   298篇
  1990年   307篇
  1989年   264篇
  1988年   220篇
  1987年   182篇
  1986年   175篇
  1985年   178篇
  1984年   203篇
  1983年   188篇
  1982年   194篇
  1981年   187篇
  1980年   137篇
  1979年   153篇
  1978年   131篇
  1977年   117篇
  1975年   119篇
  1974年   117篇
  1972年   134篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
171.
Environmental Science and Pollution Research - With the development of industry, sustainable use of natural resources has become a worldwide hot topic. Heavy metal–containing sludge (HMS) is...  相似文献   
172.
Environmental Science and Pollution Research - There has been alarming depletion of manganese (Mn) reserves owing to the ongoing extensive mining operations for catering the massive industrial...  相似文献   
173.
Environmental Science and Pollution Research - This paper proposes to analyze the scientific production on climate change and fisheries in the Philippine context. This research theme was chosen...  相似文献   
174.
Environmental Science and Pollution Research - Floating vegetation islands (FVIs) have been widely utilized in various river ecological restoration projects due to their ability to purify...  相似文献   
175.
Environmental Science and Pollution Research - Longchun 30, a new wheat variety, was used to investigate seedling growth, element absorption, and antioxidant response under 150 mM NaCl and tea...  相似文献   
176.
Environmental Science and Pollution Research - The high NO2/NOX ratio in the after-treatment system is beneficial to its performance and achieved by NO catalytic conversion in diesel oxidation...  相似文献   
177.
Journal of Material Cycles and Waste Management - The accelerated generation of COVID-19 waste under the Delta-fuelled outbreak placed a sudden burden on waste disposal in Vietnam. To secure the...  相似文献   
178.
Environment, Development and Sustainability - Textiles release microfibers to the environment during production, use, and at end-of-life disposal. There is a potentially large and growing risk to...  相似文献   
179.
Ambio - Muskoxen (Ovibos moschatus) are an integral component of Arctic biodiversity. Given low genetic diversity, their ability to respond to future and rapid Arctic change is unknown, although...  相似文献   
180.
This study investigated crystallization mechanisms for the formation of lead aluminosilicate by sintering lead stabilization with kaolin-based precursors. PbAl2Si2O8 was found to be the only stable lead aluminosilicate in low-PbO system and demonstrates its highly intrinsic resistance to acid attack in leaching test. A three-stage PbAl2Si2O8 formation mechanism was supported by the results of the changing temperature in the system. Amorphization of sintered products was observed in both PbO/kaolinite and PbO/mullite systems at 600–700°C. When the temperature was increased to 750–900°C, the crystallochemical formation of lead aluminosilicates (i.e., Pb4Al4Si3O16, Pb6Al6Si2O21, and PbAl2Si2O8) was observed. Pb4Al4Si3O16 and Pb6Al6Si2O21 were found to be the intermediate phases at 700–900°C. Finally, PbAl2Si2O8 was found to be the only crystallite phase to host Pb at above 950°C. A maximum of 80% and 96.7% Pb can be incorporated into PbAl2Si2O8 in PbO/kaolinite and PbO/mullite systems, respectively, but the final products exhibited different microstructures. To reduce environmental hazard of lead, this strategy demonstrated a preferred mechanism of immobilizing lead into PbAl2Si2O8 structure via kaolin-based precursors.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号