Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/30436
Title: | A Comparison of In-vitro PAH Bioaccessibility in Historically Contaminated Soils: Implications for Risk Management |
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Contributor(s): | Esmaeili, Atefeh (author); Knox, Oliver (author)![]() ![]() |
Publication Date: | 2021 |
Early Online Version: | 2021-04-05 |
DOI: | 10.1080/15320383.2021.1897083 |
Handle Link: | https://hdl.handle.net/1959.11/30436 |
Abstract: | This study compared polycyclic aromatic hydrocarbon (PAH) extractable fractions determined using six in-vitro methods, typically used for bioaccessibility/bioavailability predictions, for manufactured gas plant (MGP) historically contaminated soils, and evaluated the influence of soil properties. Methods used included depletive approaches for the bioaccessible fraction including butanol extraction (BuOH), non-buffered and buffered hydroxypropyl-β-cyclodextrin extractions (HPCD, Buf-HPCD), potassium persulfate oxidation (KPS) and solid-phase extraction using Tenax resin (Tenax); and a non-depletive polyoxymethylene solid phase extraction (POM) approach to determine the freely dissolved fraction. The KPS extraction removed the most ∑16 PAHs (1.5–77.1 fold more than other methods), while POM extracted the smallest ∑16 PAHs (average of 3.9–77.1 fold less than the other 5 methods). Soil properties were generally inconclusive as indicators of extractable fraction for the historically contaminated soils. Neither total nor organic carbon were important but soil particle size was most influential. Toxicity values and biodegradation endpoints derived using bioaccessibility-biodegradability linear regression models on the extracted PAH fractions ranged widely for the different soils, and illustrated the high variability for predicted ecotoxicity and bioremediation outcomes in risk managment application. The results demonstrated the importance of validation with intended soil end use and receptors for in-vitro assessment of bioaccessibility and bioavailability, to fully inform regulatory decision-making and risk management. |
Publication Type: | Journal Article |
Source of Publication: | Soil and Sediment Contamination: An International Journal, 30(8), p. 901-923 |
Publisher: | Taylor & Francis Inc |
Place of Publication: | United States of America |
ISSN: | 1549-7887 1532-0383 |
Fields of Research (FoR) 2008: | 050304 Soil Chemistry (excl. Carbon Sequestration Science) 050205 Environmental Management 050206 Environmental Monitoring |
Fields of Research (FoR) 2020: | 410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) 410404 Environmental management |
Socio-Economic Objective (SEO) 2008: | 960911 Urban and Industrial Land Management 961407 Urban and Industrial Soils 961208 Rehabilitation of Degraded Urban and Industrial Environments |
Socio-Economic Objective (SEO) 2020: | 180603 Evaluation, allocation, and impacts of land use 180605 Soils 180206 Rehabilitation or conservation of coastal or estuarine environments |
Peer Reviewed: | Yes |
HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
Appears in Collections: | Journal Article School of Environmental and Rural Science |
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