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土壤重金属污染的生物修复法研究 总被引:1,自引:0,他引:1
文章系统论述了治理土壤重金属污染的生物修复法(主要包括:植物修复法、微生物修复法、动物修复法)及未来治理土壤重金属污染的研究方向,以期提高对土壤重金属污染的重视,为今后土壤重金属污染治理提供科学的依据。 相似文献
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九江石化总厂从意大利Snam公司引进的52万t/a尿素装置首次采用了辛比隆公司生产的中速离心式高压氨泵。在试用中暴露出机封泄漏,轴弯超差引起振动跳车,泵内壳易冲蚀等一系列问题,严重危及生产。九江石化总厂和外方专家一道在现场对氨泵进行了一系列改造,逐步走出了困境。本文将试用和改造的情况作了系统的介绍。 相似文献
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软土地基处理是工程界公认的有较高风险的工程领域,传统软土固化中大量使用硅酸盐水泥,不仅消耗自然资源,还会对环境产生不良影响,使用环境友好型碱激发地质聚合物替代传统硅酸盐水泥越来越受到国内外学者的重视。论文基于国内外已有研究成果,从碱激发地质聚合物固化土发展历史、碱激发地质聚合物种类、碱激发地质聚合物反应机理、碱激发地质聚合物固化土力学特性和各类性能等方面进行研究进展的综述分析,重点谈论地质聚合物处理软土的力学特性,并对不同碱激发地质聚合物在软土地基加固中抗渗性能、抗冻融性能、抗腐蚀性能等进行分析,对碱激发地质聚合物在软土地基加固中的应用进行系统梳理和展望,以期引导和提升碱激发地质聚合物在软土地基加固中的应用,实现我国地基加固可持续发展。 相似文献
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土壤石油烃污染已引起广泛关注,石油烃具有高毒性和持久性,对生态环境和人体健康会产生严重危害。本文综述了石油烃污染土壤修复技术的国内外研究进展,系统论述了微生物技术在石油烃污染土壤修复中的研究现状,重点探讨了微生物联合修复技术的过程机制和应用前景,包括植物-微生物联合修复、电动-微生物联合修复、表面活性剂强化微生物修复、化学氧化-微生物联合修复及动物-微生物联合修复等,并对未来石油烃污染土壤微生物修复技术的研究发展方向提出了展望。 相似文献
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Reinout Lageman 《Electrochimica acta》2007,52(10):3449-3453
The site of a former silver factory that has been severely polluted with chlorinated solvents was treated by excavating the polluted soil and installing a pump and treat system. After an initial fall in contaminant concentrations, no further progress was observed over a number of years. The Province of Utrecht tried to solve the problem by requesting remediation contractors to propose a solution at a fixed price. The winning solution was electro-bioreclamation, a combination of in situ techniques: heating soil and groundwater in the source areas, combined with soil vapour extraction and low-yield groundwater pumping, and enhancing biodegradation in the groundwater plume area. Two years of heating and 2.5 years of biodegradation has been resulted in near-complete removal of the contaminants. 相似文献
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为了对离心泵的数值模拟做系统的分析研究,提高模拟手段,为设计者和工程应用人员提供参考。系统地阐述了离心泵的结构、建模、网格划分和数值模拟方法,给出了离心泵在数值模拟时的基本方法和步骤。 相似文献
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微注射成型与微分注射成型技术 总被引:1,自引:0,他引:1
张攀攀;王建;谢鹏程;杨卫民 《中国塑料》2010,24(6):13-18
综述了国外微注射成型设备的发展历史,国内微注射成型设备的最新进展以及国内学者在微注射成型基础理论领域的研究进展,对现有微注射成型技术进行了系统地比较;提出了一种微型制品成型的新技术--微分注射成型技术,阐述了基于熔体泵的微分注射成型的成型机理,提出了一种利用常规注塑机进行微制品高效注射成型的实施方法。 相似文献
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C-SpargeTM, better known as ozone sparging (microbubble ozone), is used for treatment of the plume zone area with VOCs, mainly PCE, at a former dry cleaner site in Utrecht. The City of Utrecht has had good results with C-Sparge in combination with pump and treat. Prior to the application of C-Sparge, pump and treat was used for removal of mass in the plume until tailing of the groundwater concentrations occurred. Together the pilot test and full-scale system lowered PCE groundwater concentrations from ppm-level (max. 15 ppm) to low ppb-level (400 ppb) in about 125 days. Currently, the remediation is in the tail end, and the site remediation will be closed. Perozone® (peroxide-coated ozone) is used on a former dry cleaner site in Terneuzen. After demolition of the dry cleaner facility and excavation of the hot spot in soil, MIP-CPTs were done to investigate for possible DNAPL (Dense non-aqueous phase liquids) below the former dry cleaner facility. After installing 60 Laminar Spargepoints® over approximately 100,000 m3 soil volume, the system was started in October, 2005. The initial results indicate a quick removal of aqueous PCE concentrations. The experience indicates that treatment of the DNAPL with Perozone is possible. Mobilization effects were found in the source zone also. From extended monitoring appears a >99% reduction of this initial increased concentration. Currently, a total of about 85% mass has been removed within the 100,000 m3 of soil volume, and the remediation has reached the tail end. 相似文献