烟气脱汞技术研究进展

基于现阶段烟气汞的排放情况,介绍当前燃煤电站的几种烟气脱汞技术。主要是先将零价汞氧化为二价汞,再进行脱除。其中利用现有烟气控制设备,活性炭吸附及添加改性物质,有比较好的脱汞效率,电催化、光催化以及等离子体脱汞等新技术处于研发阶段,而烟气中多种污染物协同脱除有较好的应用前景。     

燃煤电厂烟气脱汞技术与应用前景分析

目前最大的人为汞排放源是燃煤电厂产生的烟气,文章综述了当前主要的烟气脱汞技术,并对其前景进行分析.     

我国燃煤锅炉汞减排工艺措施探讨

面对当前汞污染日益严峻的趋势,分析了燃煤锅炉烟气其它污染物（如二氧化硫、氮氧化物、颗粒物）控制设施及其运行情况,结合所燃用的煤质情况,介绍了燃煤锅炉烟气汞减排各种经济实用的方法,以及选择汞排放控制措施的“抉择树”。根据燃煤锅炉烟气实际情况,确定可采用的汞减排控制技术,必要时采取活性炭喷射脱汞技术（ACI）,最大限度地提高协同除汞效果。同时提出了应注重燃煤残留物中汞的二次污染问题。     

国内外燃煤电厂汞排放控制技术比较分析

概述了燃煤电厂汞排放的危害及汞迁移转化的规律;对国内外燃煤电厂的汞排放浓度情况进行了比较;指出汞排放控制技术的研究目前主要集中在燃烧前燃料脱汞、燃烧中脱汞和燃烧后烟气脱汞等方面;以美国运用较多的燃煤电厂炉前溴盐添加剂脱汞技术为案例进行分析,在煤里加入4ppm的溴,由于溴化添加剂产生的汞脱除率约64%,总汞控制率达80%,汞排放浓度约为2.6μg/m3;如果加入12ppm的溴,由于溴盐添加剂产生的汞脱除率约76%,总汞控制率可达88%,汞排放浓度约为1.56μg/m3。因此,溴盐添加剂脱汞技术对我国目前装备了SCR和湿法脱硫装置的燃煤电厂脱汞具有较大的参考价值。     

新型烟气循环流化床脱硫技术创新研究

阐述了LJD新型节水烟气循环流化床脱硫除尘脱汞一体化工艺的机理,介绍了该技术的创新点及技术优势,指出该LJD新工艺,可实现95%以上的脱硫率,污染物排放可满足最新的环保排放要求,有助于我国大气污染问题的加快解决。     

焚烧烟气中汞的在线监测方法

汞的不当使用和不当排放造成了环境严重污染并危及人类健康及生态环境安全,已经成为全球性的重大问题之一。我国汞污染排放的问题也不容乐观。环保部针对焚烧烟气汞在线监测设备制定了相应的技术要求草案,为污染源汞在线监测设备提供了相应的技术要求,各类在线监测技术将广泛应用。本文介绍了目前焚烧烟气中汞的监测方法,并进行了讨论和提出了建议。     

燃煤电站电袋复合除尘器协同脱汞的研究

通过对电袋复合除尘器的协同脱汞效率进行测试实验,考察了电区条件、负荷条件对电袋复合除尘器协同脱汞效率的影响,并基于实验结果,分析了电袋复合除尘器协同脱汞的优势。     

含汞气田污水脱汞新技术

国内气田含汞污水处理主要采用硫化物沉淀法,辅以水处理絮凝剂增加沉淀效果。国外研究了一些含汞污水脱汞新工艺:沉淀一絮凝法、活性炭吸附法、离子交换法等,组合使用效果更佳,可脱除单质汞、离子汞和有机汞,脱汞深度可达1.0×10~(-9)mg/L级。借鉴国外含汞气田污水处理工艺,研究经济高效的脱汞工艺,减少汞污染,对我国含汞气田的合理开发具有重要的现实意义。     

燃煤电厂烟气中Hg的采样及测定方法研究

对国内煤种Hg含量分析及燃煤电厂控制现状进行了阐述,对燃煤电厂烟气中Hg的采样及测定方法进行了分析研究,分别研制出ZR-3701型烟气总汞采样器和RA-915M型汞分析仪进行燃煤烟气中Hg的采样及测定,并与同类测试仪器进行对比,为燃煤电厂烟气中Hg测定标准的研制提供了借鉴。     

氧化改性活性炭吸附脱除游离态汞

煤是一种主要化石能源，燃煤烟气中汞排放引起的污染现已达到严重危害人类健康的程度，主要原因是其中的游离态汞（Hg^0）由于低熔点、高平衡蒸气压以及低水溶性而难以由传统的烟气净化装置中去除。燃煤烟气中汞的治理势在必行。本文在研究国内外含汞废气治理技术的基础上，对活性炭分别进行了浓HNO3和H2O2氧化改性，研究其对游离态汞的吸附效率和吸附等温线。结果表明，改性后的活性炭对汞的吸附能力明显增强。     

现阶段国内外城市固体废弃物的治理技术与治理概况

城市固体废弃物是人们在工业生产活动、生活活动及商业活动中所产生的固体废物,这种废物随着国民经济的发展、人口的增长、人民生活水平的提高,数量不断增加。它破坏了市容,污染环境,给人民健康带来了极大的危害,因此,需加以处置和处理。本文将系统地介绍现阶段国内外城市固体废弃物的现状及处理技术,并针对我国国情,提出合理化的处理方案。     

塔里木河上游及源流区草原荒漠化及其防治研究

加强生态环境保护和建设是西部大开发的战略重点。针对塔里木河流域环境恶化、草地开发利用失衡、草原荒漠化日趋严重的问题,提出具体规划和综合治理方案。     

迎评促建期间大学生思想政治工作的开展与思考

搞好大学生思想政治工作对促进学校的建设工作意义重大.针对当前我院迎评促建工作中的学生思想上存在的误区,应进一步加强宣传、加强思想政治工作队伍建设以及不断总结过去和创新现在,根据当前迎评促建工作的实际,采取一定措施.     

中小城市的光污染及防治对策

我国经济处于高速增长期,建设日新月异,中小城市的光污染问题日趋明显,防治显得十分重要。文章以中山市城区为例,对道路照明、建筑照明、广告照明、绿化照明,以及玻璃幕墙反射等光污染情况进行了调研和评价。根据中山市城区的光污染情况,从制定和完善光污染防治法规体系、加强规划和宏观管理、提高公众参与力度和监督力度、加大人才培养和政策扶持力度、加大清洁生产推广力度以及实施照明设计单位资质认证等多方面提出了对光污染的防治对策。     

环境、资源统计与核算

本文从国家实施可持续发展战略出发，分析了环境统计工作存在的问题。提出了可持续发展的环境，资源统计与核算的新概念。     

Bauxite and alumina: trends and prospects

During the past 25 years the bauxite and alumina industry has grown threefold creating major change in the industry structure and reducing the dominance of the majors. Australia has emerged as the leading producer with a major third party alumina market developed principally by Alcoa of Australia. Future growth while, less dramatic, is likely to be substantial requiring US$50 billion to fund new projects which will be concentrated in developing countries with large bauxite reserves and developed infrastructure.     

Smart and eco-cities in India and China

ABSTRACT

Smart and eco-cities have become important notions for thinking about urban futures. This article contributes to these ongoing debates about smart and eco-urbanism by focussing on recent urbanisation initiatives in Asia. Our study of India’s Smart Cities Mission launched under the administration of Narendra Modi and China’s All-In-One eco-cities project initiated by Xi Jinpin unfolds in two corresponding narratives. Roy and Ong’s [2011. Worlding Cities: Asian Experiments and the Art of Being Global. Oxford: Wiley-Blackwell] “worlding cities” serves as the theoretical backdrop of our analysis. Based on a careful review of a diverse set of academic literature, policy and other sources we identify five process-dimensions for analysing the respective urban approaches. We show how the specific features of China’s and India’s urban focus, organisation, implementation, governance and embedding manifest both nations’ approaches to smart and eco-urbanism. We argue that India’s Smart City Mission and China’s All-in-One project are firmly anchored in broader agendas of change that are set out to transform the nation and extend into time. The Indian Smart City Mission is part of a broader ambition to transform the nation enabling her “smart incarnation” in modernity. Smart technologies are seen as the key drivers of change. In China the framework of ecological civilisation continues a 5000-year historical tradition of civilisation excellence. By explicitly linking eco-urbanism to the framework, eco-cities become a means to enact ecological civilisation on the (urban) ground.     

浅谈油气开发与环境安全

文章分析了油气能源现状、油气开发与环境的关系、油气开发与环境安全的关系,油气开发中的环境保护对策与环境监理。得出:油气开发既要做到和谐生产,又要保护环境;在油气开发中,对环境有影响的应加大修复力度,采取相应的环境保护措施,确保有效、长效的环境保护目标。     

Transport and fate of nitrate and pesticides: hydrogeology and riparian zone processes

There is continuing concern over potential impacts of widespread application of nutrients and pesticides on ground- and surface-water quality. Transport and fate of nitrate and pesticides were investigated in a shallow aquifer and adjacent stream, Cow Castle Creek, in Orangeburg County, South Carolina. Pesticide and pesticide degradate concentrations were detected in ground water with greatest frequency and largest concentrations directly beneath and downgradient from the corn (Zea mays L.) field where they were applied. In almost all samples in which they were detected, concentrations of pesticide degradates greatly exceeded those of parent compounds, and were still present in ground waters that were recharged during the previous 18 yr. The absence of both parent and degradate compounds in samples collected from deeper in the aquifer suggests that this persistence is limited or that the ground water had recharged before use of the pesticide. Concentrations of NO(-)(3) in ground water decreased with increasing depth and age, but denitrification was not a dominant controlling factor. Hydrologic and chemical data indicated that ground water discharges to the creek and chemical exchange takes place within the upper 0.7 m of the streambed. Ground water had its greatest influence on surface-water chemistry during low-flow periods, causing a decrease in concentrations of Cl(-), NO(-)(3), pesticides, and pesticide degradates. Conversely, shallow subsurface drainage dominates stream chemistry during high-flow periods, increasing stream concentrations of Cl(-), NO(-)(3), pesticides, and pesticide degradates. These results point out the importance of understanding the hydrogeologic setting when investigating transport and fate of contaminants in ground water and surface water.