Contaminated marine sediment stabilization/solidification treatment with cement/lime: leaching behaviour investigation

Todaro, Francesco; Gisi, Sabino De; Notarnicola, Michele

doi:10.1007/s11356-020-08562-1

Cited by 23 publications

(7 citation statements)

References 24 publications

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“…It was possible to calculate the rate of leaching for metals as a ratio of the content of an element in eluate after 28 days (C 28 in mg/L) to its total content in the untreated sediment (C SED in mg/kg) ( Figure 6 ). This coefficient provides information about both the amount and rate of leaching of a given element from the treated sediment [ 32 ]. The data revealed the highest amounts of As, Cu, and Zn were released from sediments treated with mix design 2.…”

Section: Discussionmentioning

confidence: 99%

“…Contaminated marine sediments were sampled from the first basin of the Mar Piccolo of Taranto (Southern Italy, Figure 1 ). A team of expert scuba divers carried out the sampling campaign in the first 50 cm of the seafloor [ 32 ]. These sediments are mainly silty clays of very high plasticity and activity, and their liquidity index is on average larger than one [ 33 ].…”

Section: Methodsmentioning

confidence: 99%

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Recycling of Contaminated Marine Sediment and Industrial By-Products through Combined Stabilization/Solidification and Granulation Treatment

et al. 2023

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Stabilization/solidification (S/S) is becoming increasingly important, as it allows the remediation of contaminated sediments and their recovery into materials for civil engineering. This research proposes a cement-free cold granulation process for manufactured low-cost aggregates from marine sediments contaminated with organic compounds and metals. After the chemo-physical characterization of the study materials, two mix designs were prepared in a rotary plate granulator by adding two industrial by-products as geopolymer precursors, coal fly ash (CFA) and Blast Furnace Slag (BFS), but also alkaline activation solutions, water, and a fluidizer. The results indicated that sediments treated with mix 1 (i.e., with a higher percentage of water and fluidifier) represent the optimal solution in terms of metal leachability. The metal leachability was strictly influenced by aggregates’ porosity, density, and microstructure. The technical performance (such as the aggregate impact value > 30%) suggested the use of granules as lightweight aggregates for pavement construction. The results indicated that cold granulation represents a sustainable solution to recycling contaminated marine sediments, CFA, and BFS into lightweight artificial aggregates.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Recycling of Contaminated Marine Sediment and Industrial By-Products through Combined Stabilization/Solidification and Granulation Treatment

et al. 2023

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“…Acid washing is usually effective to remove heavy metals with their subsequent release to the washing solution (usually water) (Mulligan et al, 2001). Washing also extracts salts from marine sediments (Doni et al, 2018;Todaro et al, 2020), which is usually beneficial for downstream processes or for possible applications of the sediments treated. Strong acids such as nitric, hydrochloric and sulfuric acids can be used to reach the acid conditions in the washing solution (Löser et al, 2007).…”

Section: Washingmentioning

confidence: 99%

An overview of operations and processes for circular management of dredged sediments

Crocetti

González-Camejo

et al. 2022

Waste Management

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“…Stabilization/solidification is one of the most used techniques to reduce the risks related to contaminated sediments [43][44][45][46][47]. Indeed, more than 24% of cases of contaminated materials were treated using stabilization/solidification (S/S) technology between 2002 and 2005 [48].…”

Section: Strategies To Mitigate the Risk Posed By Dredged Sedimentsmentioning

confidence: 99%

Evaluation of the Anthropogenic Metal Pollution at Osisko Lake: Sediments Characterization for Reclamation Purposes

Darricau

Elghali

Martel³

et al. 2021

Applied Sciences

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The anthropogenic pollution of lake ecosystems by human activities (e.g., mining industries) is recognized as a serious issue. The Osisko urban lake located in Rouyn-Noranda (Quebec, Canada) was used partially as a waste disposal facility for many decades, causing a heavy pollution. The main undertakings of this study are (i) assessing the mineralogical and geochemical properties of lake Osisko sediments, and (ii) studying the pollution that occurred within lake water due to the sediments’ reactivity. Water and sediments across the lake were collected in different sensitive locations. Within the sediment samples, two parts were distinguished: a small layer of black vase over grey sediments. The black vase resembled organic matter while the gray sediment seemed close to clean lake sediments. The collected samples were characterized for their physical (particle size distribution, specific gravity and specific surface area), chemical (minor and major elements as well as total sulfur and carbon) and mineralogical (X-ray diffraction and scanning electron microscope) properties. Additionally, the reactivity of sediments was studied using weathering cells to quantify chemical species leaching and their releasing rates. The results showed that the vase was the only contaminated part with high concentrations of sulfur and metals such as copper, zinc and iron. Geochemical data showed that the composite sample and the vase potentially cause contaminated acid drainage if they are exposed to atmospheric conditions. Indeed, the pH values of the leachates from both samples were between 4 and 6, while those corresponding to sediments remained around circumneutral values. Quantitatively, the contaminant release from the tested samples was variable. Indeed, the Fe cumulative concentrations were around 200, 80 and 20 mg/kg for the vase, composite and sediment samples, respectively. Similarly, the Zn cumulative concentrations were around 4500, 4200, and below the detection limit for vase, composite and sediment samples, respectively. The same tendency was observed for Cu, S, and Fe. Thus, sediments within Osisko lake present a risk for water contamination if they are resuspended or dredged out of the lake. Consequently, they should be stabilized before their disposal. The samples’ high Cu contents also offer the possibility of their reprocessing.

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Contaminated marine sediment stabilization/solidification treatment with cement/lime: leaching behaviour investigation

Cited by 23 publications

References 24 publications

Recycling of Contaminated Marine Sediment and Industrial By-Products through Combined Stabilization/Solidification and Granulation Treatment

Recycling of Contaminated Marine Sediment and Industrial By-Products through Combined Stabilization/Solidification and Granulation Treatment

An overview of operations and processes for circular management of dredged sediments

Evaluation of the Anthropogenic Metal Pollution at Osisko Lake: Sediments Characterization for Reclamation Purposes

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