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| Titel: |
Performance Assessment and Monitoring of a Permeable Reactive Barrier for the Remediation of a Contaminated Site |
| Auteur: |
Valerio Zolla Rajandrea Sethi Antonio Di Molfetta |
| Verschenen in: |
American journal of environmental sciences |
| Paginering: | Jaargang 3 (2007) nr. 3 pagina's 158-165 |
| Jaar: |
2007 |
| Inhoud: |
The present study illustrates the long-term monitoring plan carried out in order toinvestigate the performance of a zero-valent iron permeable reactive barrier (PRB) at a chlorinatedsolvents’ site. The cleanup intervention has been undertaken at an industrial landfill located near thecity of Turin (Italy) and represents the first full-scale application of this technology in Italy. Themonitoring plan started in November 2005 with the aim to verify the attainment of the cleanup goalsand to evaluate the efficiency status of the PRB. Controls focuses not only on contaminant monitoringbut also on the hydraulic and chemical conditions created by the barrier, in order to evaluate potentiallong term effects of secondary biogeochemical processes (e.g. mineral precipitation, microbiallymediatedredox transformation, gas accumulation) on PRB performance. The monitoring plan providescontrols on groundwater chemistry (target contaminants and geochemical indicators) and coresampling for mineralogical analysis of zero-valent iron by X-ray diffraction and scanning electronmicroscopy. The first, partial results of the monitoring activity are illustrated. Monitoring data clearlyindicate that the plume is being adequately captured and treated in order to accomplish the clean-upgoals with a good safety margin. However, it results that mineral precipitation and gas phaseaccumulation could determine, over time, a decreasing in hydraulic conductivity and porosity of thebarrier, thus modifying the flow field through the reactive cell. Besides the monitoring controls, furtherinvestigations will be performed to assess the occurring microbial process and to evaluate their impacton PRB performance. |
| Uitgever: |
Science Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 50 van 78 gevonden artikelen
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