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Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation
https://orcid.org/0000-0001-6479-5429
https://orcid.org/0000-0002-7830-5969
In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.
This study proposed a Prussian blue analogue-intercalated magnesium aluminum hydrotalcite@polydopamine loose nanofiltration membrane with highly efficient PMS activation and superior antifouling properties.
Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation
https://orcid.org/0000-0001-6479-5429
https://orcid.org/0000-0002-7830-5969
In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.
This study proposed a Prussian blue analogue-intercalated magnesium aluminum hydrotalcite@polydopamine loose nanofiltration membrane with highly efficient PMS activation and superior antifouling properties.
Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation
https://orcid.org/0000-0001-6479-5429
https://orcid.org/0000-0002-7830-5969
In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.
This study proposed a Prussian blue analogue-intercalated magnesium aluminum hydrotalcite@polydopamine loose nanofiltration membrane with highly efficient PMS activation and superior antifouling properties.
Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation
Liu, Bin (author) / Xue, Zhihao (author) / Wu, Zihao (author) / Zeng, Hanxuan (author) / Zhao, Changrong (author) / Deng, Lin (author) / Shi, Zhou (author)
ACS ES&T Water ; 2 ; 1614-1624
2022-09-09
Article (Journal)
Electronic Resource
English
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