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Phytoremediation of long-term PCB-contaminated soil: A greenhouse feasibility study.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Polychlorinated biphenyls (PCBs) are persistent organic pollutants, which were banned several decades ago but still exist in the environment, posing a threat to human health. Previously, joint sealants containing PCBs were used in construction. In this study, the long-term PCB-contaminated soils were from a residential area in Västerås Municipality, where the PCBs have been leaching from buildings to the soil for several years. The objective of this thesis is to investigate the feasibility of using plants to remove PCBs from the contaminated soil at a greenhouse scale, and to use a site-specific guideline model for the risk assessment of this contaminated site. After a literature review, four plant species were selected for the greenhouse cultivation including alfalfa (Medicago sativa L.), white clover (Trifolium repens L.), horseradish (Armoracia rusticana L.) and tobacco (Nicotiana tobacum L.). The plants cultivated in the greenhouse were maintained for 92 days and then the concentrations of PCBs in the initial and remediated soils were analyzed by GC-MS. The results indicate that the selected plant species can enhance the removal of high chlorinated PCBs from soils. In the risk assessment, the contents of PCBs in soils were higher than the calculated site-specific guideline, which means it is urgent to implement measures for protecting residents’ health.

Place, publisher, year, edition, pages
2016.
Series
TRITA-LWR Degree Project, ISSN 1651-064X ; 2016:19
Keywords [en]
PCBs, Phytoremediation, Risk assessment, Site-specific guideline
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-199217OAI: oai:DiVA.org:kth-199217DiVA, id: diva2:1060818
Educational program
Degree of Master - Environmental Engineering and Sustainable Infrastructure
Examiners
Available from: 2016-12-30 Created: 2016-12-30 Last updated: 2016-12-30Bibliographically approved

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CiteExportLink to record
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