Study on Co-Pyrolysis and Characteristics of Calcite/Biochar Composites
Abstract
:1. Introduction
2. Methods and Processes
2.1. Carbonized Coconut Shell Composites
2.2. Pb(NO3)2 Solution Simulation of Industrial Wastewater
2.3. Adsorption Capacity Test
2.4. Characterization
3. Results and Discussion
3.1. Analysis of Adsorption Capacity
3.2. Adsorption Mechanism of Composite Materials
3.3. Electrochemical Properties of CP-CAL/BC Composite Materials
3.4. Properties of CP-CAL/BC Composites in Recycling
3.5. Characterization of CP-CAL/BC Composite Material
4. Conclusions
- (1)
- When embarking on the preparation process with an initial pH range of 4.0 to 5.0, optimal adsorption efficiency is achieved at a pH of 4.5. The extraction of lead ions from the CP-CAL/BC composite material is thought to unfold through a multifaceted mechanism. At the identified optimal pH, the surface charge of the composite and the solubility of lead ions are ideally balanced, facilitating the most effective adsorption. Further deviations from this pH could disrupt these interactions, leading to less efficient lead ion removal.
- (2)
- The material exhibited exceptional resilience against corrosion at an elevated temperature of 750 °C, markedly surpassing its performance at lower development conditions of 650 and 700 °C. This characteristic is critical for applications in high-temperature environments, where corrosion can significantly impact material integrity and operational efficiency. Moreover, the material’s ability to retain a high level of lead removal performance over multiple cycles, despite slight efficiency losses, indicates its suitability for cyclic processes. The slight decrease in removal rate can be attributed to the accumulation of lead or other contaminants on the material’s surface, which can be mitigated through effective regeneration techniques to maintain optimal performance over extended periods.
- (3)
- The material showed different surface morphologies and microstructural features under different conditions. Particularly, the material synthesized at 750 °C possessed a greater number of active sites, making them advantageous for the adsorption of Pb2+.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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CP-CAL/BC | Icorr (A/cm2) | Ecorr (V) |
---|---|---|
650 °C | 9.732 × 10−5 | −0.71 |
700 °C | 4.581 × 10−5 | −0.44 |
750 °C | 7.298 × 10−6 | −0.17 |
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Li, Y.; Wang, H.; Pan, T.; Zhong, T.; Jiang, J.; Wei, L.; Jin, P. Study on Co-Pyrolysis and Characteristics of Calcite/Biochar Composites. Coatings 2024, 14, 1044. https://doi.org/10.3390/coatings14081044
Li Y, Wang H, Pan T, Zhong T, Jiang J, Wei L, Jin P. Study on Co-Pyrolysis and Characteristics of Calcite/Biochar Composites. Coatings. 2024; 14(8):1044. https://doi.org/10.3390/coatings14081044
Chicago/Turabian StyleLi, Yaxuan, Haoyang Wang, Tuo Pan, Tianran Zhong, Jing Jiang, Lihui Wei, and Pen Jin. 2024. "Study on Co-Pyrolysis and Characteristics of Calcite/Biochar Composites" Coatings 14, no. 8: 1044. https://doi.org/10.3390/coatings14081044