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501.
采用超声辅助沉淀法—浸渍法制备了WO3/Ag3VO4复合光催化剂,对其进行了表征,考察了其在可见光条件下对罗丹明B的催化降解性能,并对催化机理进行了探讨。表征结果显示:WO3紧密包覆在Ag3VO4颗粒的表面,并未改变Ag3VO4的晶体结构;与Ag3VO4和WO3相比,WO3/Ag3VO4的吸收带边发生了红移。实验结果表明:w(WO3)为3.5%时,WO3/Ag3VO4对罗丹明B的可见光催化降解效果最好;在光催化剂加入量0.8 g/L、初始罗丹明B质量浓度10 mg/L的条件下,于室温下光照180 min时的罗丹明B去除率达95.76%,TOC去除率达96.5%;WO3与Ag3VO4在能带间的耦合作用下形成异质结结构,很好地抑制了光生电子-空穴对的复合。 相似文献
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通过2014年上海市西部郊区PM2.5的浓度变化分析了该地区的PM2.5污染分布状况,并且从温度、湿度和风向等方面讨论了PM2.5浓度与气象因子的关联性.结果表明:该地区2014全年超标天数有112天,超标率为30.7%,PM2.5月均浓度呈夏低冬高的趋势状态,并且PM2.5浓度与气象条件有密切的联系.该地区气温在5~15℃、湿度在60~70%时PM2.5浓度最高;在以东风为主导风盛行时,该地区PM2.5浓度较低,而在以西风为主导风盛行时,该地区易受到周边区域的高污染因素影响,形成PM2.5高浓度累积现象. 相似文献
505.
Ye Xiaoxia Li Yun Lin Huiting Chen Yichong Liu Minghua 《Journal of Polymers and the Environment》2021,29(10):3401-3411
Journal of Polymers and the Environment - Diclofenac sodium, as a typical deputation of non-steroidal anti-inflammatory drugs, is widely used in clinical treatment. Due to the heavy use, diclofenac... 相似文献
506.
Internationally and nationally, New Zealand has a growing requirement to assess and report on the possible effects of climate change. In association with this requirement, the science of climate change is rapidly evolving requiring a capacity for rapid reassessment of effects to take account of scientific advances. Consequently, past assessment methods, which have not been computationally efficient, nor easily repeated, are becoming outdated. To address this gap, an integrated assessment model (IAM), the CLIMPACTS system, has been developed for New Zealand. The CLIMPACTS system has been developed to provide flexibility in application, to be easily updated to take account of scientific advances, and capable of providing information in a manner that is relevant to policymakers. In order to be relevant in New Zealand, it has been necessary to account for different scales of assessment, nationally, at specific sites, and regionally. Nationally, the focus is on spatial applications (e.g., changes in areas of suitability), whereas at sites, the focus is on temporal applications (e.g., changes in risk). The regional capacity in the CLIMPACTS system has required an integration of spatial and temporal applications. This paper describes briefly the capability that has been developed at these different scales of assessment, with brief examples for each. The CLIMPACTS system has enhanced New Zealand's capability to examine environmental sensitivities to climate change, as a basis for better informed policy decisions. Importantly, it is an evolving platform that can be readily extended to other sectors and updated, for example, to account for the effects of internationally agreed greenhouse gas (GHG) emission targets. 相似文献
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Christopher Lee Ye Beverly Du Desy Christina Judith Palfrey Edward O'Rourke Myron Belfer 《Disasters》2015,39(1):86-107
Thirty months after the Indian Ocean tsunami of 26 December 2004, thousands of families in Aceh Province, Indonesia, remained in temporary barracks while sanitation conditions and non‐governmental organisation support deteriorated. This study sought to determine the factors associated with functional impairment in a sample of 138 displaced and non‐displaced Acehnese children. Using multivariate linear regression models, it was found that displacement distance was a consistent predictor of impairment using the Brief Impairment Scale. Exposure to tsunami‐related trauma markers was not significantly linked with impairment in the model. Paternal employment was a consistent protective factor for child functioning. These findings suggest that post‐disaster displacement and the subsequent familial economic disruption are significant predictors of impaired functioning in children's daily activities. Post‐disaster interventions should consider the disruption of familiar environments for families and children when relocating vulnerable populations to avoid deleterious impacts on children's functioning. 相似文献
509.
Environmental Fluid Mechanics - The flow structure around upright porous fences and a triangular prism was numerically investigated by using the RNG k-ε turbulence model. The numerical method... 相似文献
510.
Lv Ying Li Jia Chen Zhenxing Ye Hengpeng Du Dongyun Shao Li Ma Mengyu 《Environmental science and pollution research international》2021,28(2):1491-1501
Environmental Science and Pollution Research - A strain of silicon-activating bacteria was isolated from electrolytic manganese residue (EMR); identified as a species of Ochrobactrum by integrated... 相似文献