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171.
泥炭和腐植酸类物质在环境保护中的应用 总被引:11,自引:0,他引:11
本文叙述了泥炭的形成、组成、结构、泥炭及腐植酸类物质在环境保护中的广泛应用:用泥炭净化被放射性污染的废水;用泥炭除去废水中的重金属离子;用泥炭净化工业和城市污水;泥炭对水中石油及其产品的吸附;泥炭对大气中有害气体的清除.因此,泥炭和腐植酸类物质是净化生物圈的宝贵资源. 相似文献
172.
While it is widely known that sustainable development is the only sound and viable pathway for humankind’s future, its attainment remains elusive despite intensive efforts and some successes. The current industrial society approach based on product and process innovation in a variety of fields is not providing the expected results in addressing this important issue. In an attempt to carry out this unavoidable task, Osaka University’s Research Institute for Sustainability Science (RISS) introduces an integral and dynamic innovation system where technology plays a key role in fulfilling societal functions. This innovation system adopts a highly solution-driven approach that makes use of backcasting techniques based on long-term visions and mid-term strategic goals. Since technology management is the key to propelling effective innovation towards sustainability, we propose a technology transition management through the interaction of technology push, demand pull and institutional design, along with eight transition principles. RISS will develop this innovation system based on these three components and through the design of dynamic scenarios and their roadmaps. 相似文献
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煤矿和土地是人类赖以生存和发展的重要自然资源。煤矿的开采为我国经济、社会发展做出巨大贡献的同时,也造成了大面积的土地塌陷,使我国可利用土地面积进一步减少,严重影响了矿区的生态环境、农业生产、区域经济发展以及人民生活水平的提高。如不对塌陷区进行复垦对我国经济能源等方面都会造成极大的损失。 相似文献
176.
文章对屠宰与肉类加工废水废水中的主要污染物来源、特点及对常见的两种屠宰与肉类加工废水处理工艺特点进行了阐述,通过对某大型屠宰与肉类加工企业污水处理工艺的两个不同方案进行对比分析。指出了在结合废水特征与出水指标的情况下,更为合理的屠宰与肉类加工废水处理工艺,并通过相关技术指标,论证了最佳的废水处理工艺,同时提出了屠宰与肉类加工废水可持续处理技术的观点。 相似文献
177.
Tongzhu Zhang Jiangwei Chu Xueping WangXianghai Liu Pengfei Cui 《Resources, Conservation and Recycling》2011,55(6):613-622
Along with the increasing number of automotive output and End-of-Life vehicles (ELVs) in China, resources shortage and environmental pollution are aggravating, so the tremendous need to reuse automotive components gives birth to the industry. The Chinese government becomes to realize that it is necessary to build a conservation-oriented and environment-friendly harmonious society. As the ultimate form of recycling, remanufacturing will be an effective method to promote the development of Chinese circular economy. The automotive remanufacturing industry in China is just at the preliminary stage, this paper presents some problems before remanufacturing, during remanufacturing and after remanufacturing, and then it points out several barriers, such as restrictive policies and regulations, consumer acceptance, scarcity of technologies, etc. Like many other developed countries, Chinese remanufacturing industry will also experience the primary stage, growth stage and developed stage. while the emphasis of resources input will not be the same. By analyzing the resources input characteristics at different development stages, three development patterns, such as the Government Incenting Pattern, Technology Driving Pattern and Market Leading Pattern, are put forward. At present, the cooperation of the government, industry, universities and research institutes, etc, will jointly construct the enhancing system of automotive components remanufacturing industry in China. Finally, it concludes with a summary and some suggestions in the field. 相似文献
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为进一步研究多种不同性质的气体对瓦斯着火过程的影响,采用CHEMKIN-PRO Release软件,选择CH_4燃烧化学反应机理USC Mech 2.0模型对不同组分构成的C_2H_6/CO_2与甲烷混合气体进行数值模拟,然后分析不同组分下瓦斯着火延迟时间的变化趋势,并利用SENKIN程序对其进行敏感性分析。计算结果表明:当C_2H_6百分比小于CO_2百分比时,随着CO_2百分比的增加,瓦斯着火延迟时间略有增加,且其在T=1200K下延长了17.0%,在T=2200K下延长了8.4%,同时抑制CH_4生成的关键反应步敏感性系数下降幅度略大,其协同抑制瓦斯爆炸;当C_2H_6百分比大于CO_2百分比时,随着C_2H_6百分比的增加,瓦斯着火延迟时间大幅缩短,且其在T=1200K下缩短了63.7%,在T=2200K下缩短了35.5%,同时促进CH_4生成的关键反应步敏感性系数下降幅度大,其协同促进瓦斯爆炸。 相似文献
180.
This paper criticises the conclusions and the unanswered questions in the National Institute of Standards and Technology (NIST)'s official report on the evacuation of the World Trade Center in New York City, United States, on 11 September 2001. It reviews the extent to which the report disregards several conventional statistical methods and comments on the NIST's refusal to share the machine‐readable data file with the scientific community for replication and further analysis. Problems lie in the sampling methods employed, the treatment of missing data, the use of ordinary least squares (OLS) with binary dependent variables, the failure to document the scalability of the scales used, the lack of tests to check for constant error variance, and the absence of overall fit tests of the model. There are also conceptual and theoretical issues, such as the absence in the report of considerations of the influence of group‐level processes and their impact on the collective behaviour of evacuating collectivities. 相似文献