Modified Red Muds and Slag Based Hydraulic Binders for Zn Removal: A Matrix-Spiking Approach Applied on Clayey Sediments
Abstract
:1. Introduction
2. Material and Methods
2.1. Interaction Procedure
2.1.1. Sediment Spiking
2.1.2. Stabilization Procedure (Sequential Addition)
2.1.3. Adsorbent/Zn Aqueous Interactions
2.2. Analytical Methods
2.2.1. X-ray Fluorescence
2.2.2. X-ray Diffraction
2.2.3. Thermogravimetric Analysis
2.2.4. Particle Size and Specific Area
2.2.5. Bulk Organic Matter Characterization
2.2.6. Molecular Analysis
2.2.7. Metal Content Analysis
2.2.8. Microscopic Observations
2.3. Sorption Modeling
3. Results and Discussions
3.1. Zn Trapping within the Sedimentary Wastes: Magnitude and Pathways
3.2. Implementing SBHB and TERM to Lower Zn Release from the Sedimentary Wastes
3.3. Zn2+ Binding onto TERM and SBHB: Mechanisms and Background Effects
3.3.1. Binding Mechanisms
Zn/TERM Interactions
SBHB/Zn Interactions
3.3.2. Background (pH and Ionic Strength) Effects
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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Sediments | Surface Area (m2 g−1) | TOC (%) | HI (mg HC g−1 TOC) | OI (mg CO2/g−1 TOC) | Lipidic Fraction (mg g−1) | pH | Main Mineralogical Content |
---|---|---|---|---|---|---|---|
Lille | 2.09 | 6.78 | 452 | 98 | 15.89 | 7.8 | Quartz; Calcite; Muscovite; Albite; Orthoclase; Illite; Montmorillonite |
ASL | 4.69 | 1.15 | 201 | 128 | 1.90 | 7.7 | Quartz; Calcite; Orthoclase; Muscovite; Albite; Diopside |
Saint-Omer | 7.18 | 1.43 | 284 | 119 | 2.36 | 8.1 | Quartz; Calcite; Brushite; Muscovite, Microcline |
Langmuir | Freundlich | Dubnin-Radushkovitch | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | r2 | qmax | KL | a | b | r2 | KF | a | b | r2 | KDR | |
pH 7 | 0.05 | 0.04 | 0.98 | 15.75 | 1.59 | 0.44 | 2.19 | 0.52 | 0.12 | 0.0006 | −0.97 | 0.66 | 0.38 |
pH 2 | 0.08 | 0.09 | 0.95 | 12.41 | 0.90 | 0.23 | 0.51 | 0.51 | 0.06 | 0.015 | −1.65 | 0.89 | 0.16 |
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Mahamat Ahmat, A.; Maherzi, W.; Le Milbeau, C.; Benzerzour, M.; Abriak, N.-E. Modified Red Muds and Slag Based Hydraulic Binders for Zn Removal: A Matrix-Spiking Approach Applied on Clayey Sediments. Minerals 2021, 11, 1189. https://doi.org/10.3390/min11111189
Mahamat Ahmat A, Maherzi W, Le Milbeau C, Benzerzour M, Abriak N-E. Modified Red Muds and Slag Based Hydraulic Binders for Zn Removal: A Matrix-Spiking Approach Applied on Clayey Sediments. Minerals. 2021; 11(11):1189. https://doi.org/10.3390/min11111189
Chicago/Turabian StyleMahamat Ahmat, Adoum, Walid Maherzi, Claude Le Milbeau, Mahfoud Benzerzour, and Nor-Edine Abriak. 2021. "Modified Red Muds and Slag Based Hydraulic Binders for Zn Removal: A Matrix-Spiking Approach Applied on Clayey Sediments" Minerals 11, no. 11: 1189. https://doi.org/10.3390/min11111189