全文获取类型
收费全文 | 95篇 |
免费 | 1篇 |
国内免费 | 19篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 3篇 |
环保管理 | 10篇 |
综合类 | 46篇 |
基础理论 | 9篇 |
污染及防治 | 15篇 |
评价与监测 | 17篇 |
社会与环境 | 1篇 |
出版年
2023年 | 3篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 7篇 |
2014年 | 5篇 |
2013年 | 9篇 |
2012年 | 9篇 |
2011年 | 2篇 |
2010年 | 5篇 |
2009年 | 5篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 5篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 7篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 2篇 |
排序方式: 共有115条查询结果,搜索用时 15 毫秒
81.
直接超滤和混凝-超滤组合工艺的膜污染比较 总被引:6,自引:0,他引:6
利用滤饼层过滤模型和膜孔窄化模型,结合国产中空纤维超滤膜对提取的天然腐植酸进行直接超滤和混凝-超滤2种工艺的试验结果分析,表明混凝预处理基本消除了膜孔污染,并且大大降低了膜表面滤饼层污染阻力,从而使超滤保持高渗透通量。另外,与原水直接超滤相比,混凝-超滤组合工艺对溶解性天然有机物的去除率较高,DOC去除率从28%提高到53%,UV254去除率从40%提高到78%。 相似文献
82.
钢渣对直接大红4BE染料的脱色性能 总被引:2,自引:0,他引:2
采用搅拌吸附的方法,在混凝搅拌装置中考察了钢渣对直接大红4BE染料废水脱色率的影响因素及其机理。结果表明,当初始pH值为7.0、染料初始浓度为100 mg/L、钢渣目数为100~120目、用量为10.0 g时,按染料与钢渣的质量比2∶1(mg/g)、转速为200 r/min搅拌吸附,脱色效果较好。当反应时间为100 min时,脱色率为97.14%,可达纺织染整工业水污染物排放标准中色度的Ⅰ类标准。吸附过程的机理主要有快速的物理吸附、OH-与带色素的阴离子之间的配位体交换及絮凝沉淀作用。 相似文献
83.
高岭土负载纳米铁镍双金属去除水中偶氮染料直接耐晒黑G 总被引:1,自引:0,他引:1
采用液相还原法制备焙烧高岭土负载纳米铁镍双金属(CK-Fe/Ni)。考察了在不同条件下,如pH、投加量、初始浓度、温度等,对负载型纳米铁镍双金属降解水中偶氮染料直接耐晒黑G的影响及动力学研究。结果表明:在pH=9.49、温度为30℃、负载型纳米铁镍双金属的投加量为1.05 g/L、搅拌速度为60 r/min,经过20 min反应后,负载型纳米铁镍双金属降解水中偶氮染料直接耐晒黑G的去除率达到了99.98%。吸附和电镜表征结果表明,作为载体的焙烧高岭土起着吸附直接耐晒黑G和分散纳米铁镍双金属颗粒的作用导致反应活性提高。降解动力学数据表明,负载型纳米铁镍双金属对直接耐晒黑G的降解过程符合伪一级反应动力学规律,速率常数k随负载型纳米铁镍双金属的投加量的增加而提高,表观活化能为19.72 kJ/mol。最后,利用高岭土负载纳米铁镍双金属对废水处理,结果表明,负载型纳米铁镍双金属在实际废水中对直接耐晒黑G的去除率达到了99.98%。 相似文献
84.
A. Gr. Mahura D. A. Jaffe R. J. Andres J. T. Merrill 《Atmospheric environment (Oxford, England : 1994)》1999,33(30):159
The Bilibino nuclear power plant (68°03′N, 166°20′E, 340 m asl) in northeastern Siberia is the closest Russian nuclear power plant to the USA. We used an isentropic trajectory model to estimate the probability that air in the Bilibino region would be transported to Alaska following a hypothetical accident. This estimate is based on the meteorological data from 1991 to 1995. Our calculations indicate that the probability that air in the Bilibino region will be transported to Alaska is approximately 6–16%, averaged over the entire year. This probability doubles in the summer and early fall with a maximum in August of 12–33%. For the entire year the mean, median, and minimum transport times from the plant to Alaska are 4, 3.5 and 1 d, respectively. Since rapid transport (1–2 d) could bring air parcels containing short-lived radionuclides, these events potentially represent the greatest risk to inhabitants of Alaska. 相似文献
85.
86.
对铁阳极电化学处理直接大红4BE染料废水脱色率和脱色能耗的影响因素进行研究。考察了电流密度、染料溶液初始pH值、染料初始浓度和支持电解质Na2SO4浓度对脱色性能的影响。结果表明,电流密度、染料废水初始pH、染料初始浓度、支持电解质浓度对脱色率和脱色能耗产生较大影响。在电流密度1.667 mA/cm2、pH值6.54、染料浓度50mg/L、Na2SO4浓度0.01 mol/L、温度20℃、搅拌速度600 r/min、电解时间60 min条件下,脱色率达到92.1%,脱色能耗1.298 kWh/kg染料、铁阳极消耗量41 mg/400 mL染料模拟废水。 相似文献
87.
Air capture has recently been advanced by several parties as a solution to the problem of constraining – and ultimately reducing – atmospheric CO2 in response to climate change. However, there are significant barriers pertaining to scale, energy needs and cost, which will hugely challenge the effectiveness and practicality of air capture. This paper examines the thermodynamics, energetics and economics and politics of air capture. These compare unfavourably with alternative approaches to atmospheric greenhouse gas reduction. An analysis is made of the energy cost of the one favoured DAC technology for which experimental results are available in the open literature – temperature/vacuum swing adsorption, and of one point source capture technology – oxyfiring of refinery FCCUs. We also examine the engineering effort required to implement atmospheric capture on a scale at which it could significantly reduce atmospheric levels of CO2; and questions are addressed regarding its practicability and appropriateness. The analysis demonstrates that air capture remains at best a peripheral activity, at worst a distraction, until point sources of greenhouse gas emissions such as power stations, industrial flue gases, shale gas wellheads, anaerobic digestion plants and landfill sites have been completely decarbonised. When these and so many other unaddressed factors are affecting our global climate, the pursuit air capture, the ultimate “end-of-pipe” solution, is inappropriate. 相似文献
88.
Davide Papurello Andrea Lanzini Pierluigi Leone Massimo Santarelli Silvia Silvestri 《Waste management (New York, N.Y.)》2014,34(11):2047-2056
The present work investigates electricity production using a high efficiency electrochemical generator that employs as fuel a biogas from the dry anaerobic digestion of the organic fraction of municipal solid waste (OFMSW).The as-produced biogas contains several contaminants (sulfur, halogen, organic silicon and aromatic compounds) that can be harmful for the fuel cell: these were monitored via an innovative mass spectrometry technique that enables for in-line and real-time quantification.A cleaning trap with activated carbons for the removal of sulfur and other VOCs contained in the biogas was also tested and monitored by observing the different breakthrough times of studied contaminants.The electrochemical generator was a commercial Ni anode-supported planar Solid Oxide Fuel Cell (SOFC), tested for more than 300 h with a simulated biogas mixture (CH4 60 vol.%, CO2 40 vol.%), directly fed to the anode electrode. Air was added to promote the direct internal conversion of CH4 to H2 and CO via partial oxidation (POx).The initial breakthrough of H2S from the cleaning section was also simulated and tested by adding ~1 ppm(v) of sulfur in the anode feed; a full recovery of the fuel cell performance after 24 h of sulfur exposure (~1 ppm(v)) was observed upon its removal, indicating the reliable time of anode exposure to sulfur in case of exhausted guard bed. 相似文献
89.
The Direct Pink 12B dye was treated by iron-carbon micro-electrolysis (ICME) and Fenton oxidation. The degradation pathway of Direct Pink 12B dye was inferred by ultraviolet visible (UV-Vis), infrared absorption spectrum (IR) and high performance liquid chromatography-mass spectrometry (HPLC-MS). The major reason of decolorization was that the conjugate structure was disrupted in the iron-carbon micro-electrolysis (ICME) process. However, the dye was not degraded completely because benzene rings and naphthalene rings were not broken. In the Fenton oxidation process, the azo bond groups surrounded by higher electron cloud density were first attacked by hydroxyl radicals to decolorize the dye molecule. Finally benzene rings and naphthalene rings were mineralized to H2O and CO2 under the oxidation of hydroxyl radicals. 相似文献
90.
Bo Zhang Hoi Dick Ng John H.S. Lee 《Journal of Loss Prevention in the Process Industries》2013,26(6):1293-1299
For the explosion safety assessment in industrial setting, detonation dynamic parameters provide important information on the sensitivity and conditions whereby detonations can be favorably occurred. In this study, new measurement of the critical tube diameter and the critical energy for direct initiation of a detonation is reported for a number of hydrocarbon–oxygen mixtures. The simultaneous experimental measurement carried out in this work allows the investigation of the direct scaling between these two dynamic parameter quantities of gaseous detonations. Using the new set of data, this paper also assesses the validity of an existing semi-empirical initiation model, namely, the surface energy model by Lee, and a simplified work done model. Both phenomenological models provide a general relationship between the two dynamic detonation parameters and comparison shows a good agreement between the theoretical results and the experimental measurement. The scaling of critical tube diameter with detonation cell size in this study also confirms the results in the previous literature. 相似文献