“Treating Waste with Waste”: Utilizing Phosphogypsum to Synthesize Porous Calcium Silicate Hydrate for Recovering of Fe2+ from Pickling Wastewater
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Preparation of PCSH
2.2.2. Adsorption Experiment
2.3. Characterization and Analytical Methods
3. Results and Discussion
3.1. Synthetic Thermodynamic Analysis
3.2. Effect of Different Condition Parameters on SO42− Conversion Rate in PG
3.3. SEM and BET Characterization of PCSH
3.4. PCSH Adsorbs Fe2+ from Simulated Pickling Wastewater
3.5. Adsorption Kinetics
3.6. Adsorption Mechanism Analysis
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Composition | SO3 | CaO | P2O5 | SiO2 | Fe2O3 | Al2O3 | Na2O | K2O | F |
---|---|---|---|---|---|---|---|---|---|
Content | 51.58 | 39.61 | 5.11 | 2.25 | 0.61 | 0.38 | 0.16 | 0.15 | 0.17 |
Material | Specific Surface Area (m2/g) | Average Pore Size (nm) | Pore Volume (cm3/g) |
---|---|---|---|
PCSH | 93.5066 | 20.5658 | 0.4819 |
Model | Concentration (mg/L) | R2 | Qe (mg/g) | K1 (min−1) | K2 | a | b |
---|---|---|---|---|---|---|---|
Pseudo- first-order | 200 | 0.9198 | 233.71 | 0.0643 | — | — | — |
250 | 0.8844 | 293.11 | 0.0953 | — | — | — | |
300 | 0.8386 | 328.45 | 0.1193 | — | — | — | |
Pseudo- second-order | 200 | 0.9819 | 256.77 | — | 0.00035 | — | — |
250 | 0.9840 | 314.84 | — | 0.00048 | — | — | |
300 | 0.9769 | 349.69 | — | 0.00058 | — | — | |
Elovich | 200 | 0.9767 | — | — | — | 83.34 | 0.0235 |
250 | 0.9569 | — | — | — | 411.02 | 0.0237 | |
300 | 0.9426 | — | — | — | 1391.66 | 0.0248 |
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Liang, P.; Chen, C.; Li, J.; Chen, J. “Treating Waste with Waste”: Utilizing Phosphogypsum to Synthesize Porous Calcium Silicate Hydrate for Recovering of Fe2+ from Pickling Wastewater. Sustainability 2024, 16, 7796. https://doi.org/10.3390/su16177796
Liang P, Chen C, Li J, Chen J. “Treating Waste with Waste”: Utilizing Phosphogypsum to Synthesize Porous Calcium Silicate Hydrate for Recovering of Fe2+ from Pickling Wastewater. Sustainability. 2024; 16(17):7796. https://doi.org/10.3390/su16177796
Chicago/Turabian StyleLiang, Pan, Chaoyi Chen, Junqi Li, and Jiahang Chen. 2024. "“Treating Waste with Waste”: Utilizing Phosphogypsum to Synthesize Porous Calcium Silicate Hydrate for Recovering of Fe2+ from Pickling Wastewater" Sustainability 16, no. 17: 7796. https://doi.org/10.3390/su16177796