Synthesis and Enhanced Phosphate Recovery Property of Porous Calcium Silicate Hydrate Using Polyethyleneglycol as Pore-Generation Agent
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
Chemical samples | Carbide residue | |||||||
---|---|---|---|---|---|---|---|---|
Chemical Components | CaO | SiO2 | Al2O3 | SO2 | MgO | Fe2O3 | SrO | H2O |
Contents/% | 79.34 | 3.57 | 2.14 | 1.22 | 0.62 | 0.21 | 0.26 | 12.64 |
2.2. Preparation and Modification of CSH
2.2.1. Preparation of CSH
2.2.2. Modification Using PEG
2.3. Solubility Experiments
2.4. Experiments on Phosphate Recovery from Synthetic Solutions
2.5. Characterization Instruments
3. Results and Discussion
3.1. Specific Surface Areas (SBET) and Pore Structure
Samples | Total volume (cm3/g) | Peak pore diameter (nm) | SBET (m2/g) |
---|---|---|---|
CSH (PEG-0) | 0.28 | 12.97 | 85.92 |
CSH (PEG-0.1%) | 0.20 | 10.28 | 77.95 |
CSH (PEG-0.2%) | 0.28 | 9.34 | 118.77 |
CSH (PEG-0.4%) | 0.40 | 10.79 | 148.11 |
CSH (PEG-0.6%) | 0.87 | 9.83 | 352.96 |
CSH (PEG-0.8%) | 0.31 | 10.17 | 119.94 |
3.2. Formation Mechanism of the Porous Structure
3.3. The Solubility and Dissolution Kinetics
3.4. The Phosphate Recovery Property
Samples | Quality (g) | Content of P (%) |
---|---|---|
CSH (PEG-0) | 1.02 | 10.53 |
CSH (PEG-0.1%) | 1.02 | 9.81 |
CSH (PEG-0.2%) | 1.03 | 11.75 |
CSH (PEG-0.4%) | 1.04 | 12.95 |
CSH (PEG-0.6%) | 1.07 | 15.40 |
CSH (PEG-0.8%) | 1.05 | 13.24 |
3.5. Mechanism of Phosphate Recovery Property Enhancement
4. Conclusions
Conflict of Interest
References
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Guan, W.; Ji, F.; Chen, Q.; Yan, P.; Pei, L. Synthesis and Enhanced Phosphate Recovery Property of Porous Calcium Silicate Hydrate Using Polyethyleneglycol as Pore-Generation Agent. Materials 2013, 6, 2846-2861. https://doi.org/10.3390/ma6072846
Guan W, Ji F, Chen Q, Yan P, Pei L. Synthesis and Enhanced Phosphate Recovery Property of Porous Calcium Silicate Hydrate Using Polyethyleneglycol as Pore-Generation Agent. Materials. 2013; 6(7):2846-2861. https://doi.org/10.3390/ma6072846
Chicago/Turabian StyleGuan, Wei, Fangying Ji, Qingkong Chen, Peng Yan, and Ling Pei. 2013. "Synthesis and Enhanced Phosphate Recovery Property of Porous Calcium Silicate Hydrate Using Polyethyleneglycol as Pore-Generation Agent" Materials 6, no. 7: 2846-2861. https://doi.org/10.3390/ma6072846