袋式除尘用过滤材料的性能测试与对比

针对袋式除尘用过滤材料选用时的低阻、高效要求,对PPS、P84、FMS9806、PPS覆膜、FMS9806覆膜、HBT等6种常用的过滤材料的过滤效率、过滤阻力等性能指标进行测试与对比.测试结果表明:HBT的过滤效率较高,仅次于FMS9806覆膜,且过滤阻力较低;FMS9806覆膜滤料的过滤效率明显高于其他过滤材料,但阻力也是最高的;其余过滤材料的过滤效率均低于这2种材料,同时阻力相对较高.     

新型溴系阻燃剂环境污染现状研究进展

新型溴系阻燃剂(NBFRs,novel brominated flame retardants)作为传统溴系阻燃剂的替代品已广泛应用于电子产品、纺织品、家具等商品中,随着这些商品的生产、使用和处置,NBFRs不可避免地释放到环境中,给环境和人体带来潜在的危害.部分NBFRs可通过摄食和呼吸作用进入人体对人体产生一定危害...     

Foreign,Domestic, and Cultural Factors in Climate Change Reporting: Swedish Media’s Coverage of Wildfires in Three Continents

This study examines domestic media’s coverage of foreign wildfires from a climate change perspective. It explores Swedish newspapers’ coverage of wildfires in Australia, the Mediterranean region, and the USA during a three-year period (February 2013–March 2016), focusing on how and to what extent climate change is viewed as an underlying cause. A central result is that climate change is mentioned far more often in the case of Australian wildfires than of fires in the other two regions. Another finding is that the climate change issue became more prominent after a severe domestic wildfire in 2014. These observations are also examined qualitatively through a combined frame and discourse study where the importance of foreign news values, the use of foreign sources, cultural proximity/distance, and domestication procedures are analysed. In conclusion, foreign, domestic, and cultural factors in climate change reporting in relation to extreme events are further discussed.     

Environmental public opinion in U.S. states, 1973–2012

Partisan polarization of public opinion is a major trend in American environmental politics. While the national pattern is widely recognized, scholars know much less about the polarization of public opinion over time at the state level. This lack of knowledge is unfortunate because geographic variation in the polarization of opinion is essential for explaining the origins of partisan polarization and evaluating its consequences for policy. To fill the gap, the multilevel regression and poststratification technique is applied to provide credible estimates of state-level environmental public opinion for both Democrats and Republicans, 1973–2012. It appears that the growing partisan gap reflects increased pro-environmental opinion among Democrats across many states, whereas Republican state-level public opinion is converging toward a much lower baseline. Cross-state variation among both parties has decreased over time, contributing to greater partisan polarization in the aggregate. Changes in the sorting of voters in and out of political parties cannot explain these patterns of polarization.     

Tipping Points and Climate Change: Metaphor Between Science and the Media

Over the past decade, scientists and journalists have prominently utilized the metaphor of a tipping point for drastic, irreversible and dangerous climate change. This paper shows how the tipping point metaphor became a multi-purpose bridge between science and the news media, describing how its meaning and use developed and diversified in interaction between these two domains. Within the scientific domain, the metaphor developed from a rhetorical device conveying a warning of drastic, irreversible and dangerous climate change to a theoretical concept driving empirical research. The news media soon picked up the tipping point metaphor for abrupt and dangerous climate change, turning it into a common part of the journalistic lexicon. Moreover, both science and the news media developed another, societal use of the tipping point metaphor, calling for radical societal change to avoid climate change catastrophe. The tipping point metaphor is hence not a monolithic notion but a highly versatile concept and expression, allowing it to be used for various communicative purposes by distinct stakeholders in different contexts.     

Enduring Extremes? Polar Vortex,Drought, and Climate Change Beliefs

Some extreme weather events may be more likely to affect climate change beliefs than others, in part because schema individuals possess for different events could vary in encouraging such links. Using a representative sample of U.S. adults and geocoded National Weather Service data, we examine how a range of extreme weather event categories relate to climate change beliefs, and the degree to which individuals’ self-reported experiences are shaped by their political views across event types. For tornado, hurricane, and flood events, we find no link with beliefs. For polar vortex and drought events, we find that although self-reported experience is linked with climate beliefs, reporting of these experiences is influenced by political identity and partisan news exposure. These findings underscore a limited role for extreme weather experiences in climate beliefs, and show that events more open to interpretation, such as droughts and polar vortex disturbances, are most likely to be seen through a partisan lens.     

Blogging about Climate Change in Russia: Activism,Scepticism and Conspiracies

The article explores the new media’s role in climate change communication in Russia. By providing an open space for the expression of very diverse points of view, the internet creates a substitute media reality where both climate activists and climate sceptics can question the established discourse. Analysis of 374 entries published on the LiveJournal blogging platform has resulted in the identification of four discursive categories: “conspiracies of climate change,” “climate change impact,” “political games of climate change” and “online (anti-)environmentalism.” Each category demonstrates how the same topic can be framed in very different ways depending on bloggers’ worldview rather than the nature of the discussed environmental problem. The findings also show that the blogs act as “echo-chambers” for both climate deniers and climate activists reinforcing their behold beliefs. Finally, the analysis discovers some parallels with the traditional media coverage in their minimal critique of Russian state policy on climate.     

Media Representations of Climate Change: A Meta-Analysis of the Research Field

A flurry of studies in recent years has analyzed the role of media in climate change communication. This article provides a systematic, large-scale, and up-to-date overview of the objects and characteristics of this research field through a meta-analysis. It identifies 133 relevant studies and analyzes them empirically. The results show that research activity has risen strongly over time, and that the analytical spectrum has expanded to include an increasing number of countries, more types of media including online and social media, and different methodological approaches. The analysis also demonstrates, however, that scholarship in the field still concentrates strongly on Western countries and print media.     

低温下生物膜流化床工艺硝化反应动力学研究

采用生物膜流化床工艺对中部某城镇污水处理厂进行提标改造,在冬季水温低于14℃时进行中试研究。取好氧池1和2中的部分填料经小试实验对其中的硝化反应动力学分析,得出填料上相应生物膜硝化反应速率表达式。并通过物料衡算计算出两级生物膜流化床反应器硝化反应动力学模型,经过实际中试实验,测得实际值与计算值相关性较好,其相对误差在15%以下。应用模型在单个反应器为完全混合、整体为推流模式的多级生物膜流化床工艺,得出NH4+-N出水浓度计算表达式。