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논문 기본 정보

자료유형
학술저널
저자정보
Tian Wang (Nankai University) You Zhang (Nankai University) Guihong Li (Nankai University)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제30권 제4호
발행연도
2025.8
수록면
78 - 89 (12page)

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초록· 키워드

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Environmental concerns have driven progress in water purification, especially in membrane distillation (MD) for saline wastewater. This study focused on developing superhydrophobic membranes tailored for MD applications in saline dental wastewater. We successfully created four modified superhydrophobic membranes by incorporating silica and fluorine onto polytetrafluoroethylene (PTFE). Characterization showed that all modified membranes had water contact angles exceeding 140° and featured a rough, regularly stacked surface structure. The greater roughness than PTFE membranes arose from silicon dioxide nanoparticles enhancing the surface arrangement of spherical particles. The average pore size of the hydrophobic membranes decreased, enhancing antifouling performance. In MD tests, two modified membranes experienced a flux decline after 10 hours due to rising brine concentration from 5 g/L to 35 g/L. After 20 hours, the normalized flux of the SMf membrane stabilized at 0.98, with a salt rejection rate of 99.98%, due to its surface structure facilitating a Cassie-Baxter condition that minimizes salt accumulation. In calcium-ion wastewater, membranes sustained stable flux for 18 hours with over 99.9% salt rejection. Anti-fouling mechanisms included reduced nucleation, shorter solid-liquid contact times, and decreased contact area.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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