基于g-C3 N4研究环境中甲氧苄啶的光降解行为及其毒性

为研究残留抗生素在不同环境介质中的可见光降解行为特征,借助非金属和生物相容的石墨相氮化碳（g-C₃N₄）构建恒温恒湿和快速模拟可见光降解的实验环境,考察甲氧苄啶（TMP）进入不同环境（水、大气颗粒物和土壤）中的光降解过程与机制,并深入探讨TMP降解前后毒性变化规律.结果表明,用氙灯模拟太阳光和g-C₃N₄共存下,水、大气颗粒物和土壤中TMP经光照3 h后降解率分别为89.2%、35.8%和16.9%,同时发现参与水体TMP光降解的主要活性物质是·OH,而在大气颗粒物和土壤介质中光降解过程主要受·O₂^-控制.与大气颗粒物、土壤相比,水中TMP光解后可生成较为稳定的羰基化中间产物（m/z,305）,水生毒性试验结果表明TMP光解产物对斜生栅藻表现出较原药更强的毒性,可显著抑制藻细胞生长率、叶绿素a和b的含量,并引起细胞氧化应激.     

深层过滤理论与技术的研究进展

深层过滤是水处理工艺中的重要单元操作。近年来 ,在滤料、过滤工艺的研究开发及过滤理论研究方面有了新的发展。本文评述了一些主要研究进展     

采用Washburn动态法研究水处理滤料的亲油亲水性

用Washbum动态法研究了核桃壳、磁铁矿和陶粒砂滤料的亲油亲水性，并对其表面结构进行了表征．结果表明，用Washburn动态法研究水处理滤料润湿性的实验重复性较好，实验方法可行．实验测得核桃壳、磁铁矿和陶粒砂的亲油亲水比（LHR）依次为76．41、1．057和0.8769，说明核桃壳滤料的亲油性很好，而磁铁矿和陶粒砂滤料表现了更好的亲水性．与SEM、EDS、FTIR分析结果一致，核桃壳、磁铁矿和陶粒砂滤料表面亲油亲水性的差别主要归因于其表面物理化学结构的不同．     

Considering connections between Hollywood and biodiversity conservation

Cinema offers a substantial opportunity to share messages with a wide audience. However, there is little research or evidence about the potential benefits and risks of cinema for conservation. Given their global reach, cinematic representations could be important in raising awareness of conservation issues and species of concern, as well as encouraging greater audience engagement due to their heightened emotional impact on viewers. Yet there are also risks associated with increased exposure, including heightened visitor pressure to environmentally sensitive areas or changes to consumer demand for endangered species. Conservationists can better understand and engage with the film industry by studying the impact of movies on audience awareness and behavior, identifying measurable impacts on conservation outcomes, and engaging directly with the movie industry, for example, in an advisory capacity. This improved understanding and engagement can harness the industry's potential to enhance the positive impacts of movies featuring species, sites, and issues of conservation concern and to mitigate any negative effects. A robust evidence base for evaluating and planning these engagements, and for informing related policy and management decisions, needs to be built.     

Figuring Out #Fukushima: An Initial Look at Functions and Content of US Twitter Commentary About Nuclear Risk

This study takes an exploratory look at Twitter content in the USA about the emergency at Japan's Fukushima-Daiichi nuclear power station. In particular, I focus on the concepts of the “atrophy of vigilance” from the risk communication literature and the message functions fulfilled for social media users. Two important results emerge from this analysis. First, Twitter content in the USA reflected a cautious approach, mainly suggesting an informative versus interpretive function and rarely mentioning risk or hazard outright. Second, this informative emphasis on risk dominated the content of tweets in the few days following the emergency but decreased substantially within 2 weeks afterwards; it was then overtaken by an interpretive risk emphasis. In addition, toward the end of this period, tweets were more likely to include hyperlinks to websites of traditional news outlets. Implications for the empirical study of social media and risk communication are discussed.     

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.     

各国袋式除尘器用滤料性能测试方法的异同

详细介绍了德国标准VDI/DIN 3926(2004)、美国标准ASTM D 6830-02(2008)、日本标准JIS Z 8909-1(2005)和中国标准《袋式除尘器技术要求》GB/T 6719-2009中关于袋式除尘器用滤料性能检测的实验装置和实验方法.通过对比分析,得到各国袋式除尘器用滤料性能测试方法和检测装...     

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.     

发挥新闻媒体在环境保护中的作用

环境宣传的对象是社会各阶层的公众而新闻媒体是向公众传播环境文化、传递环境保护信息的重要载体.通过新闻媒体宣传党和国家的环境保护方针政策、法律法规、科普知识以及动员公众参与环境保护的各项活动,将保护环境、改善生态、合理利用与节约各种资源的意识和行动渗透到公众的理念中具有十分重要的作用.引导公众积极参与环保公益活动,不断提高公众的环境意识是环境宣传的基本任务.     

Comparative study of microbial community structure in different filter media of constructed wetland

Comparisons of microbial community structure, in eight filter media of zeolites, anthracite, shale, vermiculite, ceramic filter media, gravel, steel slag and bio-ceramic, were undertaken by analyzing the phospholipid fatty acid (PLFA) composition. A total of 20 fatty acids in the range of C_(11) to C_(20) were determined but only 13 PLFAs were detected in steel slag. They consist of saturated fatty acids, branched fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids. The variation of fatty acids was revealed in the relative proportions of these fatty acids in different media. The aerobic prokaryotes were the predominant group in all media. The PLFA composition showed significant differences among the eight different media by Tukey's honestly test. It was found that steel slag was significantly different in the microbial community as compared to other filter media, probably due to its alkaline effluent. Steel slag alone is probably not a good choice of substratum in constructed wetlands. The principle components analysis (PCA) showed that zeolites, bio-ceramic, shale and vermiculite had a similar microbial community structure while steel slag and ceramic filter media were distinct from other media.