全文获取类型
收费全文 | 395篇 |
免费 | 12篇 |
国内免费 | 115篇 |
专业分类
安全科学 | 21篇 |
废物处理 | 14篇 |
环保管理 | 45篇 |
综合类 | 231篇 |
基础理论 | 71篇 |
污染及防治 | 111篇 |
评价与监测 | 9篇 |
社会与环境 | 7篇 |
灾害及防治 | 13篇 |
出版年
2023年 | 6篇 |
2022年 | 37篇 |
2021年 | 31篇 |
2020年 | 18篇 |
2019年 | 18篇 |
2018年 | 20篇 |
2017年 | 34篇 |
2016年 | 32篇 |
2015年 | 25篇 |
2014年 | 35篇 |
2013年 | 41篇 |
2012年 | 35篇 |
2011年 | 51篇 |
2010年 | 29篇 |
2009年 | 35篇 |
2008年 | 24篇 |
2007年 | 24篇 |
2006年 | 14篇 |
2005年 | 11篇 |
2004年 | 2篇 |
排序方式: 共有522条查询结果,搜索用时 15 毫秒
461.
462.
463.
A straightforward and environment-friendly protocol for the synthesis of valuable chiral N-(tert-butylsulfinyl)imines has been developed. Different from traditional process with benzaldehydes as substrates, arylmethyl alcohols, benzylthiol, dibenzyl ether, thioether, and disulfide are used as alternative substrates to react with tert-butanesulfinamide in the presence of KOtBu under air for the synthesis of chiral N-(tert-butylsulfinyl)imines. This is a transition metal-free, mild, cost-effective, and simple process. 相似文献
464.
465.
Zhifei Ma Huali Cao Fengchun Lv Yu Yang Chen Chen Tianxue Yang Haixin Zheng Daishe Wu 《Frontiers of Environmental Science & Engineering》2021,15(5):98
466.
A Fenton process that uses FeCl2 as the alternative catalyst was employed to deal with the biologically treated landfill leachate. Data obtained revealed that this Fenton process can provide an equivalent pollutant removal as the Fenton process that uses FeSO4 as catalyst. Central composite design (CCD) and response surface methodology (RSM) were applied to evaluate and optimize the four key factors, namely initial pH, Fe(II) dosage ([Fe2+]), H2O2/Fe(II) mole ratio ([H2O2]/[Fe2+] ratio) and reaction time, which affect the performance of the Fenton treatment. Chemical oxygen demand (COD) and color were selected as response variables. This approach provided statistically significant quadratic models, which were adequate to predict responses and to carry out optimization under the conditions studied. It was demonstrated that the interaction between initial pH and [H2O2]/[Fe2+] ratio has a significant effect on the COD removal, while the interaction between [H2O2]/[Fe2+] ratio and reaction time shows a large impact on color removal. The optimal conditions were found to be initial pH 5.9, [Fe2+] = 9.60 mmol/L, [H2O2]/[Fe2+] ratio = 2.38, reaction time = 5.52 h. Under this optimal scheme, the COD and color in the effluent were reduced to 159 mg/L and 25°, respectively, with an increase of BOD5/COD ratio from 0.05 to 0.21. 相似文献
467.
Wu Min Wang Zhiyuan Zhou Jie Niu Mingxing Jiang Xiaolin Lv Yaoling Xiao Qianqian Li Gongxia Wang Yayi 《Journal of Material Cycles and Waste Management》2018,20(2):946-954
Journal of Material Cycles and Waste Management - Hydrogen sulfide (H2S) is the most predominant malodorous gas released during the thermal drying of municipal wastewater sludge. Experiment using a... 相似文献
468.
Oral ingestion of contaminated soil is an important pathway of human exposure to hydrophobic organic contaminants (HOCs), particularly for children in developing countries. The mobilization potential of various contaminants from ingested soil is often characterized using an in vitro gastrointestinal model, based on the quantities of contaminants remaining in digestive fluid after digestion and separation. Recently, it was experimentally demonstrated that a large fraction of mobilized contaminants sorbed on the digested residue could be released if the dissolved fraction was removed by intestinal absorption. This hypothesis was further tested in this study. Soil spiked with dichlorodiphenyltrichloroethane and its metabolites (DDXs) and polycyclic aromatic hydrocarbons (PAHs) was digested using an in vitro gastrointestinal model. A human colon carcinoma cell line (Caco-2) was cultured in digestive fluid with or without soil residue (pre-equilibrated with the soil) for 2 h. A large proportion of the contaminants (37-68%) was sorbed on the digested residue. Without this residue, 66 ± 13% of DDXs and 73 ± 14% of PAHs dissolved in the fluid, as means and standard deviations, were absorbed by the cell monolayer after exposure. With both digestive fluid and residue, the sorbed fraction of PAHs and DDXs decreased by 38-92%, while the ratios of the cellular to the dissolved concentrations were 2.7-2.8 times higher than those without the residue. This supported the hypothesis that the cell absorption of dissolved HOCs induces desorption of the sorbed fraction from digestive residue, and the desorbed HOCs can be absorbed as well. 相似文献
469.
Lv Ying Li Jia Chen Zhenxing Liu Xingyu Chen Bowei Zhang Mingjiang Ke Xuan Zhang Tian C. 《Environmental science and pollution research international》2022,29(58):87393-87401
Environmental Science and Pollution Research - As a kind of solid waste with a high silicon content, electrolytic manganese residue (EMR) can be utilized as silicon source by plants through... 相似文献
470.
Luo L Ma C Ma Y Zhang S Lv J Cui M 《Environmental pollution (Barking, Essex : 1987)》2011,159(5):1108-1113
Effectiveness and mechanism of cadmium (Cd) sorption on original, acidified and ball milling nano-particle red muds were investigated using batch sorption experiments, sequential extraction analysis and X-ray absorption near edge structure (XANES) spectroscopy. The maximum sorption capacity of Cd was 0.16, 0.19, and 0.21 mol/kg for the original, acidified, and nano-particle red muds at pH 6.5, respectively. Both acidification and ball-milling treatments significantly enhanced Cd sorption and facilitated transformation of Cd into less extractable fractions. The Cd LIII-edge XANES analysis indicated the formation of inner-sphere complexes of Cd similar to XCdOH (X represents surface groups on red mud) on the red mud surfaces although outer-sphere complexes of Cd were the primary species. This work shed light on the potential application of red mud to remediate Cd-contaminated soils and illustrated the promising tool of XANES spectroscopy for speciation of multicomponent systems of environmental relevance. 相似文献