Experimental investigations and numerical modelling of in-situ reactive caps for PAH contaminated marine sediments

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dc.contributor.authorBortone, Imma
dc.contributor.authorLabianca, Claudia
dc.contributor.authorTodaro, Francesco
dc.contributor.authorDe Gisi, S.
dc.contributor.authorCoulon, Frederic
dc.contributor.authorNotarnicola, M.
dc.date.accessioned2019-12-11T16:29:38Z
dc.date.available2019-12-11T16:29:38Z
dc.date.issued2019-11-21
dc.description.abstractThe present study compared numerical modelling and experimental investigations to evaluate the effectiveness of in-situ reactive capping for marine sediments contaminated by polycyclic aromatic hydrocarbons (PAHs). As a case study, sediment samples from Mar Piccolo (Italy) were analyzed and experiments were undertaken using batch columns. Two types of capping amendments were tested: AquaGate® + 5 % of powdered activated carbon (AG PAC) and Organoclay Reactive Core Mat (OC RCM). The column tests were carried out for 20 days, obtaining a short-term PAH distribution for three cases analysed, which compared the application of the two caps with no intervention. In parallel, in order to evaluate the intervention long term efficacy, an ad-hoc multilayered model predicting PAH concentrations into the sediments and the overlying water column was developed and validated with the experimental results. Both capping systems considerably reduced PAH concentrations in the overlying water, with the highest performance seen in AG PAC for benzo[a]pyrene (99 %) and anthracene (72 %); results also confirmed in the model predictions. In addition, the numerical simulations indicated a good efficiency of both caps over time, obtaining PAH values below the threshold limit in the long term. Although further experiments need to be developed accounting for multiple contamination competitiveness.en_UK
dc.identifier.citationBortone I, Labianca C, Todaro F, et al., (2020) Experimental investigations and numerical modelling of in-situ reactive caps for PAH contaminated marine sediments. Journal of Hazardous Materials, Volume 387, April 2020, Article number 121724en_UK
dc.identifier.cris25325587
dc.identifier.issn0304-3894
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2019.121724
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14828
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectIn-situ cappingen_UK
dc.subjectMarine sedimentsen_UK
dc.subjectAdsorptionen_UK
dc.subjectPredictive modelen_UK
dc.subjectPAHsen_UK
dc.titleExperimental investigations and numerical modelling of in-situ reactive caps for PAH contaminated marine sedimentsen_UK
dc.typeArticleen_UK

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