探讨我国火电厂二氧化硫排放问题

本文简要陈述了我国二氧化硫排放的污染现状、国家减排二氧化硫的政策，阐述了我国火电厂烟气脱硫存在的问题，提出了解决问题的对策。     

火电厂SO_2污染治理设施运行率的确定方法研究

从分析我国火电行业脱硫现状入手,指出如何确定火电企业脱硫设施的运行率已成为二氧化硫总量核查的重点,但尚有较大的难度。主要为二氧化硫核查提供一种简捷、合理的测算脱硫设施运行率的方法。     

二氧化硫污染控制工程讲座

二氧化硫污染控制工程讲座张慧明，林小妍（青岛建筑工程学院环境工程系）（山东国际天马实业有限公司）第七讲工业固硫型煤脱硫技术互概述工业锅炉、工业窑炉以及铁路机车是我国量大面广的热能动力设备，也是我国ｆｆｅ排放量最多的设备．目前我国工业锅炉拥有４０多万台...     

我国燃烧电厂二氧化硫排放现状及减排技术措施

本文分析了我国燃煤电厂二氧化硫排放现状，指出燃煤电厂减排SO2管理措施不到位，经济政策不落实，国产化脱硫技术尚不成熟是目前我国燃煤电厂二氧化硫排放存在的主要问题。提出燃用低硫煤或洗选煤，采用煤炭清洁燃烧技术，建设烟气脱硫装置是解决我国燃煤电厂二氧化硫排放的有效措施。     

强化热电厂二氧化硫排放监管进一步改善城市环境质量

热电厂在我国得到了迅速发展，由于对热电厂二氧化硫排放环境保护监管力度小，造成热电厂脱硫设施运行不正常，不能达到减少空气污染，改善大气质量的目标。因此，需要加强对热电厂二氧化硫排放监管，进一步改善城市环境质量。     

火电厂二氧化硫控制技术概述

简要阐述了二氧化硫控制技术原理及工艺流程,包括炉前脱硫、炉内脱硫以及烟气脱硫技术并对我国烟气脱硫技术的未来发展方向提出几点建议。     

中小型燃煤工业锅炉湿法烟气脱硫设备存在的问题及对策

烟气脱硫是控制中小型燃煤工业锅炉二氧化硫排放主要措施之一。现有烟气脱硫设备脱硫水平普遍较低，腐蚀、结垢、堵塞、烟气带水等问题还没有得到很好的解决，运行时的实际脱硫效率很低，无法满足污染物浓度和总量控制目标的要求，烟气脱硫技术、设备及管理水平还需在实践中不断改进、完善和提高。     

二氧化硫污染治理及其资源化利用新途径

二氧化硫对环境及人类的危害越来越严重，对其的治理是保护大气环境的重要方面。本文阐述了二氧化硫的污染现状以及治理二氧化硫烟气的主要方法，为烟气脱硫方法的选择提供参考。最后用综合治理二氧化硫污染的实例，说明了环境治理中要尽量采用“绿色技术”，变废为宝，体现环境保护的新思维，实现循环经济的发展要求。     

燃煤电厂烟气脱硫技术及其主要工艺

简要介绍了我国二氧化硫的排放及其污染现状、燃煤电厂湿法、半干法、干法、可回收工艺和联合SO2／NOx工艺等五类烟气脱硫（FGD）技术及其主要的工艺，并对我国烟气脱硫技术的发展进行了探讨，指出我国烟气脱硫技术的发展应走国产化的道路，在具体的脱硫工艺的选择上应具体问题具体分析。     

WL—NA法排烟脱硫技术

从我国SO2大气污染情况出发，说明其治理重要性；重点阐述WL－NA法排烟脱硫技术．该技术脱硫率＞90％，同时得到商品价值高的二氧化硫副产品，具有推广应用价值．     

Attempts to train goldfish to respond to magnetic field stimuli

Two different conditioning procedures, one appetitive and the other aversive, were used in separate attempts to demonstrate response to magnetic fields in the goldfish, Carassius auratus. Our results lead us to question those of an orientation experiment by Becker, although we recognize the possibility that goldfish may be sensitive primarily to magnetic field direction rather than intensity and that their directional sensitivity may be evidenced most readily by orientation in the field.     

从生态旅游到低碳旅游——从理念到实践

阐述了生态旅游、低碳旅游的基本概念,分析了生态旅游存在的不足,提出低碳旅游的量化及建立各项标准及其指标评价体系并将之融入低碳旅游全过程以实现低碳旅游的标准化,重点在于实现低碳理念、低碳参与者及低碳实践3个方面的有机结合,以促进旅游业的可持续发展的可操作性建议.     

以学定教,提高课堂教学效率

根据心理学理论,学习是一个学生内化的过程,学生是自主学会的,而不是被动教会的。因此在教学中,教师只有做到以学定教,才能有效提高教学效率,促进学生对知识的掌握。     

如何做好突发环境事件应急监测的快速响应

应急监测是突发性环境污染事故处置中的首要环节,是对污染事故及时、正确地进行应急处理、减轻事故危害和制定恢复措施的根本依据。文章从制定应急监测预案、加强应急监测能力建设、摸清污染源状况、加强应急培训和应急演练等方面对做好突发环境事件应急监测的快速响应作了简要的阐述,供大家探讨。     

Croppers to livestock keepers: livelihood transitions to 2050 in Africa due to climate change

The impacts of climate change are expected to be generally detrimental for agriculture in many parts of Africa. Overall, warming and drying may reduce crop yields by 10–20% to 2050, but there are places where losses are likely to be much more severe. Increasing frequencies of heat stress, drought and flooding events will result in yet further deleterious effects on crop and livestock productivity. There will be places in the coming decades where the livelihood strategies of rural people may need to change, to preserve food security and provide income-generating options. These are likely to include areas of Africa that are already marginal for crop production; as these become increasingly marginal, then livestock may provide an alternative to cropping. We carried out some analysis to identify areas in sub-Saharan Africa where such transitions might occur. For the currently cropped areas (which already include the highland areas where cropping intensity may increase in the future), we estimated probabilities of failed seasons for current climate conditions, and compared these with estimates obtained for future climate conditions in 2050, using downscaled climate model output for a higher and a lower greenhouse-gas emission scenario. Transition zones can be identified where the increased probabilities of failed seasons may induce shifts from cropping to increased dependence on livestock. These zones are characterised in terms of existing agricultural system, current livestock densities, and levels of poverty. The analysis provides further evidence that climate change impacts in the marginal cropping lands may be severe, where poverty rates are already high. Results also suggest that those likely to be more affected are already more poor, on average. We discuss the implications of these results in a research-for-development targeting context that is likely to see the poor disproportionately and negatively affected by climate change.     

Soil microbial response to herbicides applied to glyphosate-resistant canola

Adoption of glyphosate-resistant canola (Brassica napus L.) has increased glyphosate applications to this crop, and concerns have been raised about unintended consequences of these multiple applications. A field trial was conducted to evaluate the effects of pre-seed and in-crop glyphosate and alternative herbicides on soil microbial community functional structure, diversity and biomass. Pre-seed treatments were 2,4-D, glyphosate and 2,4-D + glyphosate, and in-crop treatments were glyphosate applied once, glyphosate applied twice, ethalfluralin, ethalfluralin + sethoxydim + ethametsulfuron + clopyralid, and sethoxydim + ethametsulfuron. Rhizosphere and bulk soil was collected at flowering stage of canola and analyzed for bacterial community-level substrate utilization patterns and microbial biomass C (MBC). Where differences were significant, pre-seed application of both 2,4-D and glyphosate altered the functional structure and reduced the functional diversity of soil bacteria, but increased MBC. These effects were not necessarily concurrent. The reduction in functional diversity was due to reduction in evenness, which means that the soil where both pre-seed herbicides had been applied was dominated by only few functional groups. In 1 year, two in-crop applications of glyphosate also reduced the functional diversity of soil bacteria when applied after pre-seed 2,4-D, as did in-crop sethoxydim + ethametsulfuron following pre-seed glyphosate. Even though significant differences between herbicides were fewer than non-significant differences, i.e., there were no changes in soil microbial community structure, diversity or biomass in response to glyphosate or alternative herbicides applied to glyphosate-resistant canola in most cases, the observed changes in soil microbial communities could affect soil food webs and biological processes.     

亲近自然的一条捷径——向你推荐《生物多样性知识达人手册》

"它随处可见,从最大的海洋到最小的水坑,从最茂密的森林到最干旱的荒漠,从最富饶的沼泽到最高的山峰……它是一个活的银行账户,为人类全部事业和财富提供资本.它是什么?它就是……生物多样性." 翻开《生物多样性知识达人手册》的第一页,在"开头的话"中,你就能读到上面这一段饶有趣味的文字,让你不自觉地联想到我们所处的环境和我们赖以生存的地球.没错,这是一本新鲜出炉的、以生物多样性为主题的读物,用生动有趣的方式告诉你,什么是生物多样性?生物多样性为什么重要?你怎样才能保护好这个星球的生物多样性?     

重归大自然——密西西比河之行

密西西比河是美国第一大河。它一路曲曲弯弯向着墨西哥湾蜿蜒流去．沿途形成广袤的洪泛平原,滋润着美国大陆41％的土地。水量也比美国其他河流都要多。密西西比河及其洪泛平原哺育着400多种野生动植物。北美地区40％的水禽都沿着密西西比河的路径迁徙。密西西比河对于美国。如同长江对于中国,无论从经济还是生物多样性保护等方面,其作用都是举足轻重。     

浅谈如何做好孩子的入学准备

从幼儿园升入小学是孩子迈入知识殿堂的关键一步,也是孩子人生的一大转折。如何协助家长和教师,帮助孩子顺利实现这次转折是非常重要的。基于此目的,结合多年从事幼小教育工作的实际,并根据教育部颁布的《幼儿园教育指导纲要》精神,紧扣学前儿童的心理和学习特点,阐述如何让孩子在各方面得到系统的锻炼和提高,为顺利升入理想的小学、并尽快适应小学阶段的学习和生活做好准备。