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   164篇
  免费   0篇
  国内免费   8篇
安全科学   6篇
废物处理   13篇
环保管理   12篇
综合类   32篇
基础理论   28篇
污染及防治   63篇
评价与监测   13篇
社会与环境   4篇
灾害及防治   1篇
  2022年   1篇
  2021年   3篇
  2020年   2篇
  2019年   5篇
  2018年   10篇
  2017年   2篇
  2016年   8篇
  2015年   4篇
  2014年   7篇
  2013年   11篇
  2012年   17篇
  2011年   19篇
  2010年   7篇
  2009年   3篇
  2008年   8篇
  2007年   9篇
  2006年   4篇
  2005年   9篇
  2004年   6篇
  2003年   9篇
  2002年   3篇
  2001年   2篇
  2000年   2篇
  1998年   1篇
  1997年   3篇
  1995年   2篇
  1994年   1篇
  1993年   1篇
  1992年   2篇
  1990年   1篇
  1989年   1篇
  1986年   1篇
  1975年   1篇
  1974年   1篇
  1967年   1篇
  1965年   1篇
  1959年   1篇
  1958年   1篇
  1957年   1篇
  1921年   1篇
排序方式: 共有172条查询结果,搜索用时 93 毫秒
171.
Objective of this study was to evaluate the effects of hydroxypropyl-beta-cyclodextrin (HPCD) on the removal of phenanthrene from solid phase. Batch tests for the phenanthrene distribution between aqueous and solid phase were conducted in the presence of HPCD. Column tests and numerical simulations were conducted to evaluate the roles of HPCD cavities and interaction rates between water, HPCD, and solid phase in the enhanced removal of phenanthrene. Experimental results showed that HPCD was effective in removing sorbed phenanthrene from subsurface environment, primarily due to its negligible sorption to the solid phase and the partitioning of phenanthrene into HPCD cavities. From the numerical simulations, it was found that rate-limited partitioning of phenanthrene into HPCD cavities was most influential factor in the enhanced elution of phenanthrene. Sorption and desorption rate of phenanthrene between aqueous and solid phase was very fast or near equilibrium state. Interaction rates of contaminant between water, HPCD, and solid phase could be affected by other factors such as soil types and organic matter contents. Results from this study implied that HPCD flushing could be effectively applied for the removal of hydrophobic organic pollutants existing in the soils as sorbed or NAPL state.  相似文献   
172.
Effluent organic matter (EfOM) is the major cause of fouling in the low pressure membranes process for wastewater reuse. Coagulation and oxidation of biological wastewater treatment effluent have been applied for the fouling control of microfiltration membranes. However, the change in EfOM structure by pre-treatments has not been clearly identified. The changes of EfOM characteristics induced by coagulation and ozonation were investigated through size exclusion chromatography, UV/Vis spectrophotometry, fluorescence spectrophotometry and titrimetric analysis to identify the mechanisms in the reduction of ultrafiltration (UF) membrane fouling. The results indicated that reduction of flux decline by coagulation was due to modified characteristics of dissolved organic carbon (DOC) content. Total concentration of DOC was not reduced by ozonation. However, the mass fraction of the molecules with molecular weight larger than 5 kDa, fluorescence intensity, aromaticity, highly condensed chromophores, average molecular weight and soluble microbial byproducts decreased greatly after ozonation. These results indicated that EfOM was partially oxidized by ozonation to low molecular weight, highly charged compounds with abundant electron- withdrawing functional groups, which are favourable for alleviating UF membrane flux decline.  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