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首页> 外文会议>Waste management 2004 symposium (WM'04): waste management, energy security and a clean environment >PHYTOREMEDIATION TECHNOLOGY AT THE DOE PORTSMOUTH GASEOUS DIFFUSION PLANT
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PHYTOREMEDIATION TECHNOLOGY AT THE DOE PORTSMOUTH GASEOUS DIFFUSION PLANT

机译：美国能源部PORTSMOUTH气体扩散工厂的植物修复技术

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The Portsmouth Gaseous Diffusion Plant(PORTS),owned and operated by the U.S.Department of Energy(DOE),has produced enriched uranium since the early 1950s.The X-120 Goodyear Training Facility has been operated since plant construction as a machine shop,paint shop,and warehouse space. It is highly probable that the machine and metal shops used solvents and degreasers while in operation. The past disposal procedures for these substances are unknown.The X-120 facilities were demolished and removed in the late-1970s,prior to the more recent construction of the Gas Centrifuge Enrichment Plant.Several remedial investigations,however,have identified various VOCs(volatile organic compounds),primarily TCE(trichloroethylene),at detectable levels in the groundwater. rnPhytoremediation technology is based on the ability of certain plant species and their associated rhizospheric microorganisms to remove,degrade,or contain chemical contaminants located in the soil, sediment,surface water,groundwater,and possibly even the atmosphere.Plant species are chosen for phytoremediation based on their potential for rapid absorption of water through evapotranspiration,the degradative enzymes they produce,their growth rate and yield,the depth of their root zone,and their ability to bioaccumulate contaminants. rnPhytoremediation has been chosen as a remedial option for treatment of the groundwater in the X-749/X- 120 area.The hybrid poplar tree(Populus sp.)was chosen for the application as a result of its high growth rate and yield,high evapotranspiration rates,root zone depth,long life span,and ease of growth. The phytoremediation system of 2,640 poplar trees has been planted in seven areas/zones to manage the volatile organic compound(VOC)contaminant plume.Currently the groundwater contains levels of TCE that are above the targeted risk level.The objective of this task is to remove contamination from the groundwater,and prevent further migration of contaminants from the X-749 Landfill.The goal of the remediation procedure is to achieve a completely mature and functional phytoremediation system within two years of the initial planting of the hybrid poplar trees. rnPhytoremediation is a promising clean-up solution for a wide variety of pollutants and sites. Phytoremediation is a passive technology producing no waste during tree installation or during remediation.Mature trees can consume up to 3,000 gallons of groundwater per acre per day.Organic compounds are captured in the trees’root systems.These organic compounds are degraded by ultraviolet light as they are transpired along with the water vapor through the leaves of the trees.Phytoremediation is an in situ technology that produces an aesthetically pleasing environment,and is entirely solar driven, which provides high public acceptance.The plants are normally sold for profit after project completion and the soil remains in place and is reusable following treatment.Phytoremediation is 10%to 20%less costly than mechanical treatments,regarding overall operating costs.
机译：美国能源部（DOE）拥有并运营的朴茨茅斯气体扩散工厂（PORTS）自1950年代初以来一直生产浓缩铀。X-120固特异培训设施自工厂建设以来一直作为机修车间，油漆车间投入运营。商店和仓库空间。机器和金属车间很可能在运行时使用了溶剂和脱脂剂。这些物质的过去处置程序是未知的。X-120设施在1970年代后期被拆除并拆除，这是在气体离心浓缩厂的最新建造之前进行的。但是，经过多次补救调查，发现了各种挥发性有机化合物有机化合物），主要是三氯乙烯（三氯乙烯），在地下水中的含量可检测到。 rn植物修复技术基于某些植物物种及其相关的根际微生物清除，降解或包含土壤，沉积物，地表水，地下水甚至可能是大气中的化学污染物的能力。选择植物物种进行植物修复它们具有通过蒸散作用快速吸收水的潜力，它们产生的降解酶，其生长速率和产量，其根区的深度以及其生物积累污染物的能力。 rn植物修复已被选为X-749 / X-120地区地下水的补救措施。杂交杨树（Populus sp。）因其高生长速率和高产量，高产量而被选作应用蒸散速率，根区深度，寿命长，生长容易。在七个区域/地区种植了2,640棵杨树的植物修复系统，以管理挥发性有机化合物（VOC）污染烟羽。目前，地下水中的三氯乙烯（TCE）水平高于目标风险水平。来自地下水的污染物，并防止污染物进一步从X-749垃圾填埋场迁移。修复程序的目标是，在最初种植杂交杨树后的两年内，实现一个完全成熟且功能齐全的植物修复系统。植物修复是一种适用于多种污染物和场所的有前途的净化解决方案。植物修复是一种被动技术，在树木安装或修复过程中不会产生浪费，成熟的树木每天每英亩可消耗多达3,000加仑的地下水，树木根系中捕获有机化合物，这些有机化合物会被紫外线降解。植物修复是一种原位技术，可产生美观的环境，并且完全由太阳能驱动，从而获得了公众的高度认可。这些植物通常在项目完成后出售以牟利。就总体运行成本而言，植物修复的成本比机械处理的成本低10％至20％。

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