Fact Snapshot
- Paper: Acid-resistant nanofiltration membrane engineered by sulfonated covalent organic framework for lithium recovery from spent lithium-ion batteries leaching solutions
- Equipment: XH-300PE
- Source: Chemical Engineering Journal, 2025
- Research direction: COF
- Core conditions: Temperature 120 ℃, Power 600 W, and Time 72 h / 60 min
- Key results: Rejection rate 99.8% and Rejection rate 93.3%
Research Abstract
Acid-resistant nanofiltration membrane engineered by sulfonated covalent organic framework for lithium recovery from spent lithium-ion batteries leaching solutions was published in Chemical Engineering Journal (2025) and is indexed as a Xianghu Q1 application case for XH-300PE. The source record connects it with COF. Core operating conditions include Temperature 120 ℃, Power 600 W, and Time 72 h / 60 min. Key reported results include Rejection rate 99.8% and Rejection rate 93.3%.
Research Background and Problem
Equipment Use and Experimental Conditions
| Item | Parameter |
|---|---|
| Temperature | 120 ℃ |
| Power | 600 W |
| Time | 72 h / 60 min |
Key Result
| Metric | Result |
|---|---|
| Rejection rate | 99.8% |
| Rejection rate | 93.3% |
Evidence Details
Additional source evidence: source values include 71.02 L, 227.37 L, 99.66%, 93.3%. Entities: COF-SO3H.
Stability evidence: source values include 0.50 nm, 0.57 nm, 473.0 °C. Entities: COF-SO3H, FT-IR, S-N.
Stability evidence: source values include 30 g, 57.48 L, 93%.
As the immersion time increased from 0 to 14 days, the COF-SO3H + DA/PA membrane still maintained a comparable Na2SO4 rejection of 96 %. In contrast, during the long-term exposure to the acidic environment, the Na2SO4 rejection of the control PA membrane decreased to 7.1 %.
The NF membrane exhibited a water permeance of 77.60 L·m−2·h−1·MPa−1. This value was an order magnitude higher than that of the pristine PA membrane, while achieving a high Na2SO4 rejection of 99.8 %.
When the loading amount of COF-SO3H nanosheets increased to 8.0 μg⋅cm−2, the pure water permeance of the NF membrane notably improved from 71.02 L⋅m−2⋅h−1⋅MPa−1 to 227.37 L⋅m−2⋅h−1⋅MPa−1.
The COF-SO3H + DA/PA membrane displayed a significant difference between the monovalent Li+ rejection of 43.7 % and the divalent metal ion rejections of over 95 %.
COF-SO3H was subjected to ultrasonic exfoliation in Tris-HCl solution (10 mM, pH 8.5) using a probe of ultrasonic homogenizer under 600 W for 60 min.
The reaction vessel was sealed under a nitrogen atmosphere and reacted at 120 ℃ for 72 h.
Additional source evidence: source values include 15 g, 77.60 L, 99.8%.
Additional source evidence: source values include 43.7%, 95%, 80%.
The crude product was isolated via centrifugation and subsequently purified by deionized water, dimethylacetamide and acetone (Microwave-ultrasound synergistic synthesizer, XH-300PE, Xianghu, China).
Mechanism / Method Highlights
- Method context: Temperature 120 ℃, Power 600 W, and Time 72 h / 60 min.
- Additional source evidence: source values include 71.02 L, 227.37 L, 99.66%, 93.3%. Entities: COF-SO3H
- Stability evidence: source values include 0.50 nm, 0.57 nm, 473.0 °C. Entities: COF-SO3H, FT-IR, S-N
- Stability evidence: source values include 30 g, 57.48 L, 93%
- Reported outcome: Rejection rate 99.8% and Rejection rate 93.3%.
Application Value
- Provides a peer-reviewed SoarNova / Xianghu Q1 application case for XH-300PE.
- Supports English discovery around COF.
- Preserves quantitative result evidence: Rejection rate 99.8% and Rejection rate 93.3%.
- Maintains source-level evidence details: Additional source evidence: source values include 71.02 L, 227.37 L, 99.66%, 93.3%. Entities: COF-SO3H, Stability evidence: source values include 0.50 nm, 0.57 nm, 473.0 °C. Entities: COF-SO3H, FT-IR, S-N, Stability evidence: source values include 30 g, 57.48 L, 93%, and Source evidence: As the immersion time increased from 0 to 14 days, the COF-SO3H + DA/PA membrane still maintained a comparable Na2SO4 rejection of 96 %. In contrast, during the long-term exposure to the acidic environment, the Na2SO4 rejection of the control PA membrane decreased to 7.1 %.
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Acid-resistant nanofiltration membrane engineered by sulfonated covalent organic framework for lithium recovery from spent lithium-ion batteries leaching solutions
Chemical Engineering Journal, 2025
DOI: 10.1016/j.cej.2025.163069