全文获取类型
收费全文 | 102篇 |
免费 | 0篇 |
国内免费 | 45篇 |
专业分类
安全科学 | 3篇 |
环保管理 | 10篇 |
综合类 | 77篇 |
基础理论 | 19篇 |
污染及防治 | 37篇 |
评价与监测 | 1篇 |
出版年
2023年 | 7篇 |
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 3篇 |
2019年 | 6篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 9篇 |
2014年 | 5篇 |
2013年 | 12篇 |
2012年 | 6篇 |
2011年 | 10篇 |
2010年 | 2篇 |
2009年 | 8篇 |
2008年 | 8篇 |
2007年 | 7篇 |
2006年 | 5篇 |
2005年 | 6篇 |
2004年 | 9篇 |
2003年 | 2篇 |
2002年 | 4篇 |
2001年 | 5篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1995年 | 1篇 |
排序方式: 共有147条查询结果,搜索用时 15 毫秒
11.
Pathogenic viruses in drinking water are great threats to public health. Visible-light-driven photocatalysis is a promising technology for virus inactivation. However, the existing photocatalytic antiviral research studies have mostly been carried out in single-component systems, neglecting the effect of natural organic matter, which exists widely in actual water bodies. In this paper, electrospun Cu-TiO2 nanofibers were prepared as photocatalysts, and their photocatalytic antiviral performance in the presence of humic acid (HA) was comprehensively studied for the first time. The properties of the reaction mixture were measured during the reaction. In addition, the safety, reliability and stability of photocatalytic disinfection in the mixed system were evaluated. The results showed that the virus removal efficiency decreased with the increase of the HA concentration. The type of reaction solution, such as PBS buffer solution or water, did not affect the removal efficiency noticeably. Under acidic conditions, the electrostatic forces between photocatalysts and viruses were strengthened, leading to higher virus removal efficiency. As the reaction time went on, the pH value in the solution increased first and then tended to be stable, the conductivity remained stable, and the dissolved oxygen increased first and then decreased. The safety test showed that the concentration of Cu ions released into the solution was lower than specified by the international standards. No photoreactivation was observed, and the addition of HA significantly reduced the reutilization efficiency of the photocatalysts. 相似文献
12.
Novel 3D biogenic C-doped Bi_2 MoO_6/In_2O_3-ZnO Z-scheme heterojunctions were synthesized for the first time, using cotton fiber as template. The as-prepared samples showed excellent adsorption and photodegradation performance toward the hazardous antibiotic doxycycline under simulated sunlight irradiation. The morphology, phase composition and in situ carbon doping could be precisely controlled by adjusting processing parameters. The carbon doping in Bi_2 MoO_6/In_2O_3-ZnO was derived from the cotton template, and the carbon content could be varied in the range 0.9–4.4 wt.% via controlling the heat treatment temperature. The sample with Bi_2 MoO_6/In_2O_3-ZnO molar ratio of 1:2 and carbon content of1.1 wt.% exhibited the highest photocatalytic activity toward doxycycline degradation,which was 3.6 and 4.3 times higher than those of pure Bi_2 MoO_6 and Zn In Al-CLDH(calcined layered double hydroxides), respectively. It is believed that the Z-scheme heterojunction with C-doping, the 3D hierarchically micro–meso–macro porous structure, as well as the high adsorption capacity, contributed significantly to the enhanced photocatalytic activity. 相似文献
13.
James Redfern Marina Ratov Andrew P. Dean James Pritchett Matthieu Grao Joanna Verran Peter Kelly 《环境科学学报(英文版)》2021,33(6):128-136
Access to safe drinking water free from microbial pollution is an issue of global concern. The use of photocatalytic thin films in water treatment has focused on titanium dioxide, which requires UV-activation, proving a potential barrier to upscaling and implementation in the real world. Visible-light-activated photocatalytic thin films, such as bismuth oxide, have recently been shown to have antimicrobial properties. However, more understanding of the photocatalytic effect on the microbial population in water is required. Glass beads coated with bismuth oxide were incubated with either Microcystis aeruginosa, Anabaena sp. or free-floating genomic DNA. The presence of bismuth oxide-coated glass beads was able to rapidly stop a population of cyanobacteria from increasing. The coated beads were also able to degrade genomic DNA. Leachate from the beads showed no increase in toxicity against human liver cells. This data demonstrates the efficacy of bismuth oxide-coated glass beads for controlling potentially dangerous cyanobacterial populations, whilst potentially reducing the amount of free-floating genomic DNA (an essential issue in the face of antimicrobial resistance) – all of which should be essential considerations in emerging water treatment technologies. 相似文献
14.
以P25 TiO_2为催化剂、聚四氟乙烯乳液(PTFE)为粘结剂,采用辊压法制备了PTFE/TiO_2复合膜催化剂,并对其进行了SEM和XRD表征。结果表明:TiO_2与PTFE乳液的质量比为4:1时其表面最为平整且分布着均匀的空隙。此外,PTFE的引入并没有改变TiO_2的晶相结构与衍射峰强度。另外,随着光照时间的延长,PTFE/TiO_2复合膜催化表面·OH自由基产生量呈线性增加,且Rh B分子在553 nm处特征吸收峰强度逐渐降低。经过150 min光照后,Rh B的光催化降解率达到87%。连续重复使用14次之后,PTFE/TiO_2复合催化膜的光催化效率仅下降2%左右,这表明其可能在废水深度处理领域得到实用化应用。 相似文献
15.
The photocatalytic degradation of dimethyl phthalate (DMP) in aqueous TiO2 suspension under UV illumination has been investigated using oxygen (O2) and ferrate (Fe(VI)) as electron acceptors. The experiments demonstrated that Fe(VI) was a more effective electron acceptor than O2 for scavenging the conduction band electrons from the surface of the catalyst. Some major intermediate products from DMP degradation were identified by HPLC and GC/MS analyses. The analytical results identified dimethyl 3-hydroxyphthalate and dimethyl 2-hydroxyphthalate as the two main intermediate products from the DMP degradation in the TiO2–UV–O2 system, while in contrast phthalic acid was found to be the main intermediate product in the TiO2–UV–Fe(VI) system. These findings indicate that DMP degradation in the TiO2–UV–O2 and TiO2–UV–Fe(VI) systems followed different reaction pathways. An electron spin resonance analysis confirmed that hydroxyl radicals existed in the TiO2–UV–O2 reaction system and an unknown radical species (most likely an iron–oxo species) is suspected to exist in the TiO2–UV–Fe(VI) reaction system. Two pathway schemes of DMP degradation in the TiO2–UV–O2 and TiO2–UV–Fe(VI) reaction systems are proposed. It is believed that the radicals formed in the TiO2–UV–O2 reaction system preferably attack the aromatic ring of the DMP, while in contrast the radicals formed in the TiO2–UV–Fe(VI) reaction systems attack the alkyl chain of DMP. 相似文献
16.
以甲基橙为光催化降解对象,研究了不同波长紫外灯与不同粒径TiO2组合(365 nm紫外灯+10 nm TiO2,365 nm紫外灯+50 nm TiO2,254 nm紫外灯+10 nm TiO2,254 nm紫外灯+50 nm TiO2)光催化降解甲基橙的效果。结果表明,不同波长紫外灯与不同粒径TiO2组合影响光催化降解甲基橙的效果。其中,254 nm紫外灯+10 nm TiO2组合降解效果最好,其次为254 nm紫外灯+50 nm TiO2组合,再其次为365 nm紫外灯+10 nm TiO2组合,降解效果最差的为365 nm紫外灯+50 nm TiO2组合。由此可见,254 nm紫外灯+10 nm TiO2组合的光催化降解甲基橙的效果最好。 相似文献
17.
18.
太阳光作用下Fenton/草酸根体系对蒽醌染料降解的试验研究 总被引:2,自引:1,他引:2
以蒽醌染料(活性艳蓝K-3R)目标污染物,在自然光源下,应用Fenton/草酸根体系的降解过程进行试验研究。结果表明,通过太阳光/Fenton/草酸根的作用,可有效地净化含染料废水。 相似文献
19.
纳米材料与TiO_2光催化废水处理技术 总被引:3,自引:0,他引:3
结合纳米技术和纳米材料的基本原理和特性 ,介绍了TiO2 光催化氧化处理废水的反应原理、TiO2 的材料使用及主要影响因素 ,指出了今后的研究方向。 相似文献
20.