Environmental evaluation of dredged sediment submitted to a solidification stabilization process using hydraulic binders

Couvidat, Julien; Benzaazoua, Mostafa; Chatain, Vincent; Bouzahzah, Hassan

doi:10.1007/s11356-016-6869-9

Cited by 22 publications

(9 citation statements)

References 52 publications

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“…A Soxhlet extractor was used to study the dynamic waste leaching behavior 21,22 and cement dies 23 ; The test allowed continuous extraction of a given chemical from a solid sample. Unlike batch test, the Soxhlet test is a dynamic method that ignore the thermodynamic balance between the leaching solution and the solid, but focus on the dynamics (i.e., mobility of the element).…”

Section: Dynamic Testmentioning

confidence: 99%

A phosphogypsum‐based road material with enhanced mechanical properties for sustainable environmental remediation

Zmemla

Benjdidia

Naifar

et al. 2021

Env Prog and Sustain Energy

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Section: Dynamic Testmentioning

confidence: 99%

A phosphogypsum‐based road material with enhanced mechanical properties for sustainable environmental remediation

Zmemla

Benjdidia

Naifar

et al. 2021

Env Prog and Sustain Energy

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“…Currently, most of the studies implementing SS processes focus on the fate of metallic pollutants (Wang et al, 2018; Xia et al, 2017). For instance, the approach of Couvidat et al (2016) implementing blast furnace slag and ordinary Portland cement as binding reagents was efficient in stabilizing divalent cations (Cu 2+ , Zn 2+ and Pb 2+ ) from heavily loaded harbour sediments. The study by Saussaye et al (2016) lowered the importance of SS mechanisms.…”

Section: Reducing the Release From Solid Matrices: Hydraulic Binders mentioning

confidence: 99%

Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Ahmat

Mamindy-Pajany

2021

Waste Manag Res

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High sulfate concentrations in industrial effluents as well as solid materials (excavated soils, dredged sediments, etc.) are a major hindrance for circular economy outlooks. SO42- acceptability standards are indeed increasingly restrictive, given the potential outcomes for public health and ecosystems. This literature review deals with the treatment pathways relying on precipitation, adsorption and microbial redox principles. Although satisfactory removal performances can be achieved with each of them, significant yield differences are displayed throughout the bibliography. The challenge here was to identify the parameters leading to this variability and to assess their impact. The precipitation pathway is based on the formation of two main minerals (ettringite and barite). It can lead to total sulfate removal but can also be limited by aqueous wastes chemistry. Stabilizer kinetics of formation and equilibrium are highly constrained by background properties such as pH, Eh, SO42- saturation state and inhibiting metal occurrences. Regarding the adsorption route, sorbents’ intrinsic features such as the qmax parameter govern removal yields. Concerning the microbial pathway, the chemical oxygen demand/SO42- ratio and the hydraulic retention time, which are classically evoked as yield variation factors, appear here to be weakly influential. The effect of these parameters seems to be overridden by the influence of electron donors, which constitute a first order factor of variability. A second order variability can be read according to the nature of these electron donors. Approaches using simple monomers (ethanol lactates, etc.) perform better than those using predominantly ligneous organic matter.

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“…The index values of Na and Cl for S2L are higher than 2 because of the lime evaporation effect. Lime treatments are used to accelerate water evaporation in soil because the exothermic chemical reaction starts immediately after mixing soil and lime [2]. A closer look into Ca and Al and Si, considered as chemical strength sources, reveals that the most significant curing time impact on Al and Si, as observed in S2L7C.…”

Section: Elemental Analysismentioning

confidence: 99%

Shear strength performance of marine sediments stabilized using cement, lime and fly ash

Furlan

Razakamanantsoa²,

Ranaivomanana³

et al. 2018

Construction and Building Materials

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The combined effects of the chemical stabilization of sediments using lime, cement and fly ash on the sediment shear strength behavior are studied for geotechnical purposes. An elemental analysis is carried out to examine the chemical aspects of stabilized sediments resulting from a series of chemical reactions. Direct shear strength measurements are performed to investigate shear strength improvements and stress-strain behavior of mix samples. A statistical analysis using the principal component analysis and the ANOVA (ANalysis Of Variance) method is also conducted to examine the correlation between cohesion and elemental ratio resulting from the chemical reactions. The analysis of the principal components suggests that Ca and Si and Al and K have greater impact on cohesion than the other elements. However, the ANOVA method reveals that the elemental ratios of Si, Al and Ca produce less impact on the sediment overall gain in cohesion at 28 days of curing. These results demonstrate that the gain in cohesion mostly depends on some other physical parameters, which need to be yet examined. The prediction equation of the cohesion indicates each elemental component gain weight on the overall cohesion gain resulting from the chemical reactions. In short, the considered equation still needs to be refined, notably in terms of performing further laboratory testing.

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Environmental evaluation of dredged sediment submitted to a solidification stabilization process using hydraulic binders

Abstract: The S/S process applied using hydraulic binders proved to be efficient in the stabilization of Cu, Pb, and Zn highly presents in studied sediments, and further valorization in civilian engineering applications could be considered.

Cited by 22 publications

References 52 publications

A phosphogypsum‐based road material with enhanced mechanical properties for sustainable environmental remediation

A phosphogypsum‐based road material with enhanced mechanical properties for sustainable environmental remediation

Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Shear strength performance of marine sediments stabilized using cement, lime and fly ash

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