共查询到20条相似文献,搜索用时 46 毫秒
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造纸废水治理技术研究现状及展望 总被引:3,自引:0,他引:3
介绍了造纸废水的各种处理技术:生物处理技术、絮凝沉淀法、过滤法、气浮法、造纸废水中主要碱回收技术、光催化氧化技术、人工湿地处理系统,并分析了治理技术的发展趋势。 相似文献
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污染土壤化学修复技术研究与进展 总被引:1,自引:0,他引:1
污染土壤修复环境工程近年来发展迅猛,欧美等发达国家在其技术创新和设备改进2个层面都取得了长足进展。本文概述了化学淋洗修复技术(原位化学修复技术和异位化学修复技术)、化学还原与还原脱氯修复技术、化学氧化修复技术、溶剂浸提技术和土壤性能化学改良修复技术等污染土壤的化学修复技术原理、进展与适用性以及有关关键技术参数,并对其发展前景进行了展望。 相似文献
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概述了含酚废水的无害化处理技术现状及其进展。着重介绍了传统生物处理工艺的改良、高效菌种的选育、酶及固定化细胞等技术在含酚废水生物处理中的研究与应用 ,分析了先进氧化技术与焚烧技术的特点和存在的主要问题及应用前景 ,并探讨了含酚废水无害化处理技术的发展趋势 相似文献
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TiO2 powder-containing paper composites, called TiO2 paper, were prepared by a papermaking technique, and their photocatalytic efficiency was investigated. The TiO2 paper has a porous structure originating from the layered pulp fiber network, with TiO2 powders scattered on the fiber matrix. Under UV irradiation, the TiO2 paper decomposed gaseous acetaldehyde more effectively than powdery TiO2 and a pulp/TiO2 mixture not in paper form. Scanning electron microscopy and mercury intrusion analysis revealed that the TiO2 paper had characteristic unique voids ca. 10 μm in diameter, which might have contributed to the improved photocatalytic performance. TiO2 paper composites having different void structures were prepared by using beaten pulp fibers with different degrees of freeness and/or ceramic fibers. The photodecomposition efficiency was affected by the void structure of the photocatalyst paper, and the initial degradation rate of acetaldehyde increased with an increase in the total pore volume of TiO2 paper. The paper voids presumably provided suitable conditions for TiO2 catalysis, resulting in higher photocatalytic performance by TiO2 paper than by TiO2 powder and a pulp/TiO2 mixture not in paper form. 相似文献
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《国际环境与污染杂志》2011,11(2):211-227
Egypt is facing a major crisis due to the 1997's 40% increase in the price of imported newsprint. This price increase not only affected the press and publishers, but also placed a burden on the educational system, because most of the government textbooks depend on this type of imported paper. This crisis can be solved entirely by recycling waste paper and depending on recycled paper instead of imported paper. An experimental test facility for paper recycling was designed, manufactured and tested at the American University in Cairo (AUC). The system consists of a shredder, a beater to produce pulp, a flotation cell to remove the ink mechanically, a hand-sheet machine to produce test paper and a press/dryer to dry the paper. The paper produced was tested for physical (tear and tension) and optical (brightness and opacity) properties at different times and temperatures. The system proved to be very efficient. 相似文献
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《国际环境与污染杂志》2011,23(4):368-387
This paper discusses and analyses the evolution of the Finnish pulp and paper industries and their water pollution control strategies. The Finnish pulp and paper mills are mainly located along water courses in inland areas. The earliest documents on water pollution date back to the early 1900s. In spite of the remarkably good record during recent decades in water pollution control, it can be found among significant strategic decisions in only very few cases. 相似文献
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氨氮废水处理技术研究进展 总被引:4,自引:0,他引:4
氨氮废水是造成水体富营养化的主要因素之一 ,本文综述了氨氮废水的几种主要处理技术 ,介绍了它们的处理原理以及适用条件 ,指出了今后研究工作中需要解决的问题和氨氮废水处理技术今后的发展方向 相似文献
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本文从中国城市减灾现状分析入手,重点剖析城市减灾的可持续发展问题,并探讨了城市社会经济可持续发展中如何确立防灾减灾的地位。进而用系统科学思路研究城市综合减灾的体系建设问题,从一定意义上较为科学地解决了跨世纪的中国城市可持续发展的关键问题 相似文献
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结合全国造纸行业发展现状和趋势,分析了行业中的主要风险源、风险类型、产生原因、概率等进行风险预测,并提出相应的防范措施与应急预案。 相似文献
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