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   3195篇
  免费   132篇
  国内免费   1142篇
安全科学   252篇
废物处理   163篇
环保管理   221篇
综合类   1897篇
基础理论   499篇
污染及防治   1007篇
评价与监测   152篇
社会与环境   145篇
灾害及防治   133篇
  2024年   5篇
  2023年   55篇
  2022年   151篇
  2021年   124篇
  2020年   92篇
  2019年   99篇
  2018年   107篇
  2017年   148篇
  2016年   128篇
  2015年   152篇
  2014年   243篇
  2013年   307篇
  2012年   246篇
  2011年   255篇
  2010年   227篇
  2009年   206篇
  2008年   206篇
  2007年   208篇
  2006年   200篇
  2005年   143篇
  2004年   97篇
  2003年   137篇
  2002年   97篇
  2001年   85篇
  2000年   106篇
  1999年   93篇
  1998年   76篇
  1997年   76篇
  1996年   92篇
  1995年   75篇
  1994年   63篇
  1993年   52篇
  1992年   39篇
  1991年   21篇
  1990年   20篇
  1989年   12篇
  1988年   3篇
  1987年   5篇
  1986年   6篇
  1985年   3篇
  1984年   3篇
  1983年   1篇
  1982年   3篇
  1981年   1篇
  1976年   1篇
排序方式: 共有4469条查询结果,搜索用时 15 毫秒
771.
Environmental Science and Pollution Research - Reclaimed water (RW) has been widely used as an alternative water resource to recharge rivers in mega-city Beijing. At the same time, the RW also...  相似文献   
772.
Environmental Science and Pollution Research - Deregulated lncRNA DSCAM-AS1 expression was found in several tumors. However, mechanism and functional role of DSCAM-AS1 in cervical carcinoma remain...  相似文献   
773.

Previous studies demonstrated that short-term exposure to gaseous pollutants (nitrogen dioxide (NO2), sulfur dioxide (SO2), and ozone (O3)) had a greater adverse effect on cardiovascular disease. However, little evidence exists regarding the synergy between gaseous pollutants and cardiovascular disease (CVD). Therefore, we aimed to estimate the effect of individual gaseous pollutants on hospital admissions for CVD and to explore the possible synergistic effects between gaseous pollutants. Daily hospitalization counts for CVD were collected from January 1, 2014, to December 31, 2015. We also collected daily time series on gaseous pollutants from the Environment of the People’s Republic of China, including NO2, SO2, and O3. We used distributed lag nonlinear models (DLNMs) to assess the association of individual gaseous pollutants on CVD hospitalization, after controlling for seasonality, day of the week, public holidays, and weather variables. Then, we explored the variability across age and sex groups. In addition, we analyzed the synergistic effects between gaseous pollutants on CVD. Extremely low NO2 and SO2 increase the risk of CVD in all subgroup at lag 7 days. The greatest effect of high concentration of SO2 was observed in male and the elderly (≥ 65 years) at lag 3 days. Greater effects of high concentration of O3 were more pronounced in the young (< 65 years) and female at lag 3 days, while the effect of low concentration of O3 was greater in male and the young (< 65 years) at lag 0 day. We found a synergistic effect between NO2 and SO2 for CVD, as well as between SO2 and O3. The synergistic effects of NO2 and SO2 on CVD were stronger in the elderly (≥ 65) and female. The female was sensitive to synergistic effects of SO2-O3 and NO2-O3. Interestingly, we found that there was a risk of CVD in the susceptible population even for gaseous pollutant concentrations below the National Environmental Quality Standard. The synergy between NO2 and SO2 was significantly associated with cardiovascular disease hospitalization in the elderly (≥ 65). This study provides evidence for the synergistic effect of gaseous pollutants on hospital admissions for cardiovascular disease.

  相似文献   
774.
Environmental Science and Pollution Research - Advanced oxidation processes (AOPs) are efficient methods for water purification. However, there are few studies on using peroxymonosulfate (PMS) to...  相似文献   
775.
Environmental Science and Pollution Research - After years of governance, China’s PM2.5 pollution has improved significantly, but some problems remain. PM2.5 is the carrier of many heavy...  相似文献   
776.
Jiang  Dongmei  Jiang  Kunhong  Li  Rui  Zhao  Liangbin  Liu  Zile  Xiong  Bangjie  Jin  Du  Hao  Xiaoxia  Zhu  Li  Kang  Bo  Bai  Lin 《Environmental science and pollution research international》2022,29(36):54378-54390

The disposal of organic waste by the biocomposting of black soldier fly larvae (BSFL) has drawn broad attention. However, the discrepancies in heavy metal immobilization between BSFL biocomposting with different inoculation densities and aerobic composting need to be further researched. In this study, BSFL with inoculation densities of 0.08%, 0.24% and 0.40% was added to swine manure to investigate its influence on heavy metal bioaccumulation and bioavailability. The physicochemical properties, BSFL growth performance and amino acid contents were measured. The results showed that the germination index, total prepupal yield and bioavailable fraction removal rate (%) of Cr and Pb at an inoculation density of 0.40% of BSFL were the highest among all of the BSFL biocomposting groups. Although the bioaccumulation factor and heavy metal (Cd, Cr, Cu and Zn) concentrations of the BSFL body from swine manure with inoculation densities of 0.24% and 0.40% of BSFL were similar, the BSFL inoculation density of 0.40% had the best absorption effect on these heavy metals in terms of total prepupal yield. Therefore, this study provides a basis for exploring the optimal inoculation density of BSFL biocomposting to reduce the harmful effects of heavy metals in swine manure.

  相似文献   
777.

In this study, a one-part alkali-activated slag (AAS) composed of ground-granulated blast furnace slag, desulfurized gypsum, and hydrated lime is proposed as alternative to cement for the production of cemented fine tailings backfill (CFTB), which is an environmentally friendly binder consisting of 93.72 wt.% industrial solid waste. Results show that AAS with 67.83 wt.% slag, 25.92 wt.% desulfurized gypsum, and 6.25 wt.% hydrated lime yields the highest strength, which is 1.7–3.2 times that of ordinary Portland cement (OPC). Aside from calcium silicate hydrate gel, appreciable quantity of ettringite characterized by interlocking needles structure and high bound water is also produced during the AAS hydration process. In addition, the hydration heat of the AAS binder is 48% less than that of OPC. Moreover, CFTB made of AAS provides better workability than that of CFTB with OPC up to 20 h. The findings of this study will contribute to the production of more cost-effective, durable, and environmental-friendly cemented fine tailings backfill.

  相似文献   
778.
Environmental Science and Pollution Research - Blue carbon sinks (mangroves, saltmarshes, and seagrasses) are considered an effective nature-based approach for climate change mitigation. Despite...  相似文献   
779.
以从美国引入的转基因杨树(Populus deltoides×nigra,DN34)为材料,设置0、50、100 mg·kg~(-1)三个五氯酚胁迫质量分数开展温室盆栽试验,利用Li-6400便携式光合作用测量系统研究五氯酚污染胁迫下转基因杨树对光强的生理响应.结果表明:与对照相比,相同光强下50和100 mg·kg~(-1)质量分数的五氯酚胁迫均降低了转基因杨树叶片的净光合速率(P_n)、蒸腾速率(T_r)、胞间CO_2摩尔分数(C_i)和气孔导度(G_s).因此高质量分数五氯酚比低质量分数五氯酚对转基因杨树光合作用产生更大的抑制响应.  相似文献   
780.
为考察预水解对后续二级生化处理的影响,结合无锡市城北污水处理厂实际运行情况进行了生产性试验研究。结果表明,对于工业废水占40%的城市污水而言,原水经过水解预处理后的可生化性得到提高,并且由于水解池在未满负荷运行的情况下对碳源有机物的去除率较高,对后续硝化脱氨、反硝化脱氮和除磷存在不同的影响。  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