Citation: Xishou Guo, Haochun Wang, Zixin Ma, Jinlong Wang, Yuchao Tang, Guibai Li, Heng Liang, Xiaobin Tang. Insight into the role and mechanism of combined GAC and magnetic particles in achieving gravity-driven membrane performance enhancement[J]. Chinese Chemical Letters, ;2025, 36(10): 110781. doi: 10.1016/j.cclet.2024.110781 shu

Insight into the role and mechanism of combined GAC and magnetic particles in achieving gravity-driven membrane performance enhancement

Xishou Guo ^{a, 1} ,
Haochun Wang ^{a, 1} ,
Zixin Ma ^a ,
Jinlong Wang ^a ,
Yuchao Tang ^b ,
Guibai Li ^a ,
Heng Liang ^a ,
Xiaobin Tang ^{a, *,}

a.
State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China
b.
Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse), Anhui Jianzhu University, Hefei 230601, China

tang5462@163.com

Received Date: 20 July 2024
Revised Date: 27 November 2024
Accepted Date: 18 December 2024
Available Online: 20 December 2024

Figures(5)

Gravity-driven membrane filtration (GDM) has increasingly captured researchers' attention due to its low energy consumption and operation & maintenance. However, severe membrane fouling and permeate DOC increase restricted GDM's widespread application. This study combined granular active carbon (GAC) and magnetic particles to address this issue and results suggested that GDM3 achieved highly effective pollutant removals (85% COD_Mn, 95% UV₂₅₄, and 65% DOC) and significant flux improvement (96%) than GDM itself. GAC pretreatment before the membrane mainly helped to reduce pollutant load and improve permeated quality while magnetic particles in situ on the membrane surface contributed to engineering more open and connected structures with less extracellular polymeric substance (EPS) and soluble microbial products (SMP) than other GDM groups due to their bioeffect. GDM3 was cost-effective and had the lowest total cost with a decrease of 7.5% and 5.7% to GDM1 and GDM2. The findings provided a deep insight into the combined GAC and magnetic particles in GDM performance improvement and played a fundamental role in developing sustainable and environmentally friendly GDM processes.
- Gravity-driven membrane (GDM),
- Magnetic particles,
- Bioeffect,
- Biocake layer
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沈阳化工大学材料科学与工程学院沈阳 110142