共查询到18条相似文献,搜索用时 46 毫秒
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场地环境污染的电动修复技术研究现状与趋势 总被引:1,自引:0,他引:1
在综述国内外场地污染土壤电动修复技术的研究现状和趋势的基础上,针对场地土壤电动修复中常见问题,包括电极设置方式、化学增强试剂的选择、土壤类型和污染程度等影响去除效率的因素及处理效果和能耗等进行阐述,探讨当前我国场地土壤电动修复技术研发的重点,以促进场地污染土壤修复技术的发展和应用. 相似文献
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土壤重金属污染的工程危害及修复方法 总被引:4,自引:2,他引:2
分析了重金属污染对地基土和地下结构物的危害,比较了电动修复、土壤冲刷、原位土壤淋洗、化学固化修复土壤的优缺点,重点介绍固化/稳定化技术在修复重金属污染土壤中的应用。 相似文献
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石油污染场地土壤修复技术及工程化应用 总被引:2,自引:0,他引:2
在分析当前我国土壤受石油污染的状况基础上,介绍目前修复石油污染场地土壤的技术,包括物理修复、化学修复和生物修复等.并对各种技术的修复原理、研究进展、优缺点及其发展趋势进行了综述,结合我国的研究现状与工作基础对该领域今后的研究方向与重点进行了展望. 相似文献
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骆永明 《环境监测管理与技术》2011,23(3):1-6
随着城市化和产业转移进程的加快,我国城镇工业企业搬迁或遗留的污染场地数量与日俱增,亟须开展污染场地治理与修复工作,以保障人居环境安全、国民健康和社会稳定.综述了我国污染场地及其产生、状态和风险,污染场地管理、修复技术及工程实践进展,污染场地管理和修复的主要问题,场地污染防治与修复政策、技术和融资机制需求,旨在推进污染场... 相似文献
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浅议地下水污染治理技术方法及进展 总被引:1,自引:0,他引:1
简要介绍了地下水污染治理技术的沿革,包括物理法、水动力控制法、抽出—处理法和原位处理法,着重阐述了目前研究最多的原位处理法,即原位物化法、原位生物法和反应性渗透墙技术。并提出应该在学习国外先进技术的基础上,开发研究适合我国国情的地下水污染治理技术。 相似文献
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Availability and Assessment of Fixing Additives for The in Situ Remediation of Heavy Metal Contaminated Soils: A Review 总被引:22,自引:0,他引:22
The use of low-cost and environmental safety amendments for the in situ immobilization of heavy metals has been investigated
as a promising method for contaminated soil remediation. Natural materials and waste products from certain industries with
high captive capacity of heavy metals can be obtained and employed. Reduction of extractable metal concentration and phytotoxicity
could be evaluated and demonstrated by the feasibility of various amendments in fixing remediation. In this review, an extensive
list of references has been compiled to provide a summary of information on a wide range of potentially amendment resources,
including organic, inorganic and combined organic-inorganic materials. The assessment based on the economic efficiency and
environmental risks brought forth the potential application values and future development directions of this method on solving
the soil contamination. 相似文献
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Chevalier LR 《Environmental monitoring and assessment》2003,84(1-2):19-33
Improper disposal, accidental spills and leaks of non-aqueousphase liquids (NAPL) such as gasoline, fuel oil and creosote result in long-term persistent sources of groundwater pollution.Column and 2-D tanks experiments were conducted to evaluate the use of surfactant-enhanced recovery of light non-aqueous phase liquids (LNAPL) in groundwater aquifers. These experiments focused on the use of surfactants to promote dissolution and mobilization in addition to evaluating the increase of aqueous phase permeability as residual NAPL is recovered. Further experiments are presented that show the innovative use of surfactants during primary pumping to recover free product canpotentially increase the amount of free product recovered, canpotentially reduce the amount of residual NAPL remaining afterprimary pumping and performs better than the use of surfactantsto mobilize trapped residual NAPL. 相似文献
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面向污染场地的环境修复功能材料 总被引:1,自引:0,他引:1
在回顾环境功能材料研究进展的基础上,将材料按功效分为固化/稳定化材料、氧化还原剂类材料以及催化剂类材料,重点对固化/稳定化材料进行了介绍。根据环境材料科学的发展前沿提出了污染场地环境修复功能材料的发展趋势,并总结了功能材料开发与应用中的一些问题。 相似文献
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结合国内外研究,从典型有机污染物微生物修复机理、降解菌株的筛选、微生物修复技术,以及微生物修复技术的表面活性剂和电化学强化等方面综述了微生物修复技术的研究进展,并对其发展方向和趋势做出展望。 相似文献
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George R. Southworth Ralph R. Turner Mark J. Peterson Mary Anna Bogle Michael G. Ryon 《Environmental monitoring and assessment》2000,63(3):481-494
Approximately 250 000 kg of mercury was lost towater and soils at the U.S. Dept. of Energy Y-12 Plantin Oak Ridge, Tennessee in the 1950s and early 1960s. A creek originating within the plant receivedcontinuous inputs of waterborne mercury, predominantlyas dissolved inorganic mercury, from groundwater,streambed contamination, and sump and process waterdischarges to the contaminated storm sewer network.These produce aqueous total mercury concentrations of1–2 g L-1 in the upper reaches of the stream,decreasing to about 0.1–0.2 g L-1 in its lowerreaches. A program to reduce mercury concentrationsin the creek identified specific sources (buildingsumps, contaminated springwater seeps, foundationdrains, and contaminated piping) and rerouted wateraround contaminated portions of the drain system orcollected and treated mercury-contaminated waterbefore discharging it. As a result, waterbornemercury concentrations in the creek and total mercuryloading were reduced from 1.8 g L-1 to0.6 g L-1 and 100 to 20 g d-1, respectively, in the last 5 yr.Mean mercury concentrations in fish nearest sourceareas in the creek headwaters decreased at roughly thesame rate as waterborne total mercury concentrationsover the past five years, but at the facility boundarydownstream the decline in mercury bioaccumulation wasmuch less. At sites 5–15 km farther downstream, nodecrease was evident. Dissolved methylmercury tendedto increase with distance downstream in a patterninverse to that noted for its dissolved inorganicmercury precursor.Improvements in water quality and modification ofweirs to allow the passage of fish have resulted inthe establishment of large populations of fish inmercury-contaminated headwater areas previously devoidof fish. It may be that the accumulation, retention,and eventual downstream transport of this reservoir ofbiologically incorporated methylmercury has acted tobuffer against expected reductions in mercury in fishat downstream sites. 相似文献
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The efficiency of a Stormwater Infiltration Basin (SIB) to remove contaminants from urban stormwater was assessed in the current investigation. The SIB, installed in an urban suburb in eastern Sydney (Australia), was monitored over seven rainfall events to assess the removal efficiency of the remedial device for total suspended solids (TSS), nutrients (TP, TKN, Nox, TN), trace metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn), organochlorine pesticides and faecal coliforms (FC) from stormwater. The weighted average concentration (WAC) of TSS in the stormwater effluent from the SIB was reduced by an average of 50%, whereas the WAC of Cu, Pb and Zn were also reduced by an average 68%, 93% and 52%, respectively. However, the WAC of Cr, Fe, Mn and Ni displays either similar concentrations as the stormwater influent (Cr and Mn), or substantially higher concentrations (Fe and Ni), due possibly to leaching of fine-grained zeolite clay particles in the filtration bed. The mean removal efficiency of the SIB for total phosphorus (TP) and total Kjeldahl nitrogen (TKN) was 51% and 65%, respectively. In contrast, the average WAC of oxidisable nitrogen (nitrate and nitrite nitrogen or Nox) is about 2.5 times greater in the effluent (1.34 ± 0.69 mg L–1) than in the incoming stormwater (0.62 ± 0.25 mg L–1). The WAC of total nitrogen (TN) was similar for stormwater at the in-flow and out-flow points. The SIB was very efficient in removing FC from stormwater; and the WAC of almost 70 (100 mL)–1 at inflow was reduced to <2000 cfu (100 Ml)–1 at the outflow, representing a mean removal efficiency of 96%. Due to the low concentrations of Cd, organochlorine pesticides and PAHs in the stormwater, it was not possible to assess the efficiency of the SIB in removing these contaminants. 相似文献