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一、无酚水的制备试验 (一)制备装置(图1) 10000 ml、20000 ml下口瓶;φ10U型干燥管;脱脂棉;粒状活性炭(化学纯)。 (二)过滤方法 先将经过180℃活化2小时的粒状活性炭装入层料柱(U型干燥管)中,柱内预先放入一些蒸馏水或无酚水,以便装入的活性炭颗粒间不存在气泡。装好柱后即可使要脱酚的水通过层料柱,开始流出的水(相当于装柱时预先 相似文献
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水生态监测能够为水生态环境监督、管理和保护提供重要的数据和技术支撑。加强黄河水生态监测,维护流域水生态系统健康,对促进黄河流域高质量发展具有重要意义。从常规水质监测、生境监测和生物监测3个方面,分析了中国水生态监测方法的研究进展及在黄河流域的应用实践。结合黄河流域水生态监测尤其是生物监测相对滞后的现状,探讨了流域水生态监测的发展方向。建议加快黄河流域水生态监测能力建设,建立适用于黄河流域的水生态监测与评价标准体系,探索新兴监测技术与传统技术的有机结合。 相似文献
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日本水产厅最近制订了一项新的环保技术开发项目,旨在应用微生物分解处理海洋石油污染,在为期五年的计划包括室内实验、微生物培养和实用化实验。根据日本专家的意见,假单细胞菌属的200种以上的微生物可以将海面漂浮油垢分解成水等无害物质。日本加强生物清理石油污染技术的研究@吕璜~~ 相似文献
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对天然水中痕量元素的分析,目前国内外已采用了有机溶剂萃取、离子交换等富集技术。近年来,有关文献报导了利用8-羟基喹啉螯合,活性炭吸附富集水中金属离子的方法。活性炭吸附富集因数一般达100~10000,而有机溶剂萃取富集因数为20~50,因此,利用活性炭预富集痕量金属,是一个值得探讨的途径。 相似文献
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离子色谱技术在环境监测中的应用 总被引:8,自引:0,他引:8
袁英贤 《环境监测管理与技术》1997,9(3):14-16
详细介绍了离子色谱仪的构造,功能,以及离子色谱技术的发展状况,离子色谱作为一种新的分析方法以其独特的优点可广泛应用于水,气,土壤,生物等环境监测领域。 相似文献
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呼伦贝尔地区草原表层土壤中总有机碳与有机质初探 总被引:1,自引:0,他引:1
通过非分散红外线吸收法测定呼伦贝尔地区具有代表性的16个草原表层土壤(0~20 cm)中总有机碳、溶解性有机碳,使用重铬酸钾容量法测定有机质,并对其总有机碳与有机质水平及两者相关性进行了分析。初步分析了造成各样品之间总有机碳水平差异的原因。结果表明,只以打草场作为利用方式的土壤总有机碳含量较常年放牧场的总有机碳含量高。从草原类型和土壤类型上看,草甸草原总有机碳含量明显高于典型草原,黑钙土总有机碳含量明显高于栗钙土。综上,过度放牧会使草原土壤总有机碳大量释放。总有机碳含量与有机质含量有显著正相关性,相关系数达到0.902。 相似文献
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上海地区土壤碳汇功能评估 总被引:1,自引:0,他引:1
利用上海市第二次土壤普查资料,2004年-2005年上海耕地地力调查资料,以及2009年实地调查采样、实验分析获得的数据,研究了3个时期上海土壤有机碳的变化特征。结果表明,20多年:来上海土壤有机碳平均含量没有明显变化,土壤有机碳库逐渐减小,从而使得上海城市化过程中土壤成为一种碳源,而不是碳汇。城市郊区以扩大蔬菜、果树、苗木种植为特征的旱地作物种植方式代替水稻田,是城市化影响土地利用类型变化的明显特征,而水稻田土壤有机碳含量高于林地、菜地。种植结构的变化对土壤有机碳含量有重要影响,同时,耕作制度、耕作方式、施肥等农业管理方式也有一定影响。虽然园林绿地得到快速发展,但没有弥补城市化过程导致农田面积减少带来的有机碳损失。 相似文献
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Spatial Distribution and Temporal Change of Carbon Storage in Timber Biomass of Two Different Forest Management Units 总被引:2,自引:0,他引:2
Forests make up large ecosystems and can play an important role in mitigating the emissions of CO2, the most important greenhouse gas. However, they are sources of atmospheric carbon when they are disturbed by human or natural
causes. Storage of carbon through expansion and adaptive management of forest ecosystems can assist in reducing carbon concentrations
in atmosphere. This study proposes a methodology to produce spatially explicit estimates of the carbon storages (aboveground
plus belowground) depending on land use/cover changes in two different forest ecosystems during various periods. Carbon storages
for each forest ecosystem were projected according to inventory data, and carbon storages were mapped in a geographic information
system (GIS). Results showed that total carbon stored in above and belowground of both forest ecosystems increased from one
period to other because of especially increase of productive forest areas and decline of degraded forest areas as well as
protection of spruce forests subject to insect attacks. 相似文献
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Developing Alternative Forest Management Planning Strategies Incorporating Timber, Water and Carbon Values: An Examination of their Interactions 总被引:3,自引:0,他引:3
Currently, the integration of carbon and water values of forest ecosystems into forest management planning models has become
increasingly important in sustainable forest management. This study focuses on developing a multiple-use forest management
planning model to examine the interactions of timber and water production as well as net carbon sequestration in a forest
ecosystem. Each forest value is functionally linked to stand structure and quantified economically. A number of forest management
planning strategies varying in the amount of water, carbon, and timber targets and flows as constraints are developed and
implemented in a linear programming (LP) environment. The outputs of each strategy are evaluated with a number of performance
indicators such as standing timber volume, ending forest inventory, area harvested, and net present value (NPV) of water,
timber, and carbon over time. Results showed that the cycling time of forest stands for renewal has important implications
for timber, water, and carbon values. The management strategies indicated that net carbon sequestration can be attained at
a significant cost in terms of foregone timber harvest and financial returns. The standing timber volumes and ending forest
inventories were among the most important factors determining whether the forest constitutes a net carbon sink or source.
Finally, the interactions among the forest values were generally found to be complementary, yet sometimes contradictory (i.e.,
negatively affecting each other), depending on the assumed relationship between forest values and stand structure. 相似文献
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概述了国内外在碳中和实践与实现路径方面的研究进展,包括能源路径、技术路径、社会路径和政策经济路径。在此基础上,提出了应用实证数据和模型模拟开展碳中和定量评估、通过不同国家碳中和目标的比较和分析来评估全球碳中和能力和成本、加强不同碳中和路径与产业之间的相关性及多路径共同效应研究等建议。 相似文献
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非分散红外线气体法测定生活垃圾填埋气中二氧化碳 总被引:3,自引:0,他引:3
采用非分散红外线气体法测定生活垃圾填埋气中的二氧化碳,介绍了填埋气监测井的设置及样品采集和测定方法,讨论了稀释倍数、配气方法和填埋气成分对测定的影响,经验证,方法准确度和精密度均符合要求。 相似文献
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Charcoal versus LPG grilling: A carbon-footprint comparison 总被引:1,自引:0,他引:1
Undoubtedly, grilling is popular. Britons fire up their barbeques some 60 million times a year, consuming many thousands of tonnes of fuel. In milder climates consumption is even higher, and in the developing world, charcoal continues to be an essential cooking fuel. So it is worth comparing the carbon footprints of the two major grill types, charcoal and LPG, and that was the purpose of the study this paper documents. Charcoal and LPG grill systems were defined, and their carbon footprints were calculated for a base case and for some plausible variations to that base case. In the base case, the charcoal grilling footprint of 998 kg CO2e is almost three times as large as that for LPG grilling, 349 kg CO2e. The relationship is robust under all plausible sensitivities. The overwhelming factors are that as a fuel, LPG is dramatically more efficient than charcoal in its production and considerably more efficient in cooking. Secondary factors are: use of firelighters, which LPG does not need; LPG's use of a heavier, more complicated grill; and LPG's use of cylinders that charcoal does not need. 相似文献
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本文通过对影响街道空气中一氧化碳污染的因素进行了大量的监测及综合分析,找出乌鲁木齐市主要街道空气中一氧化碳的污染规律,为控制我市汽车污染提供科学依据. 相似文献