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Surfactant-enhanced mobilization of polycyclic aromatic hydrocarbons from an historically contaminated marine sediment: Study of surfactants’ concentration effect and continuous test for sediment flushing simulation

TitoloSurfactant-enhanced mobilization of polycyclic aromatic hydrocarbons from an historically contaminated marine sediment: Study of surfactants’ concentration effect and continuous test for sediment flushing simulation
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2024
AutoriBarbati, Berardino, Moscatelli Gabriele, Bellagamba Marco, Caiazzo Laura, Papini Marco Petrangeli, and Lorini Laura
RivistaJournal of Environmental Chemical Engineering
Volume12
Type of ArticleArticle
ISSN22133437
Parole chiaveAromatization, Column experiments, Concentration effects, Contaminated marine sediments, Contaminated sediment, flushing, Marine pollution, Marine sediments, Mobilisation, Polycyclic aromatic hydrocarbons, Polycyclic aromatics, remediation, Surfactant concentrations, Surfactant-enhanced remediation
Abstract

Contamination of marine sediments by polycyclic aromatic hydrocarbons (PAHs) poses a significant environmental threat, necessitating effective remediation strategies. This paper investigates the application of surfactants, both synthetic and natural, for the remediation of PAH-contaminated sediments, providing a systematic guideline for the preliminary selection of surfactants for flushing/washing operations, the optimal operative conditions, and the technical approach for PAH mobilization, especially in the context of a real aged contamination scenario. The study included a batch configuration test to evaluate the effect of surfactant concentration on PAH mobilization. Subsequently, a continuous configuration column experiment was performed to simulate a flushing operation of contaminated sediment. The study of process conditions highlighted that the increase in surfactant concentration led to a significant increase in PAH removal from the sediment, reaching almost 30 % efficiency using a 5 % wt surfactant solution. The column test showed great efficiency of the investigated surfactants in PAH mobilization through the flushing process of the contaminated matrix, resulting in 30 times greater efficiency than water within a much smaller pore volume range. © 2024 The Authors

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85201769024&doi=10.1016%2fj.jece.2024.113820&partnerID=40&md5=8324cd864fcb5ed682dd504bbd6a3264
DOI10.1016/j.jece.2024.113820
Citation KeyBarbati2024