Binder-free in-situ reinforced nanofibrous membrane with anti-deformable pore structures for seawater concentration

Liu, Dongqing; Liu, Peng; Li, Dongmei; Zhao, Jing; Zhang, Tao; Zhong, Lingling; Sun, Fenghao; Liu, Jie; Wang, Wei

doi:10.1016/j.memsci.2022.121338

Cited by 6 publications

(2 citation statements)

References 46 publications

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“…The intensity enhancement of the original peak at 874 cm –1 might be due to the C–H out-of-plane bending vibration of aromatic carbon on the membrane surface. On the other hand, the weakening of the stretching vibration peak of C–F 2 at 1180 cm –1 of the pristine membrane also confirmed the change in the composition of the membrane surface . Therefore, through analysis of the chemical composition of the membrane surface components, the organic pollutants adhered to the membrane surface mainly correspond to proteins and humic acids, which is consistent with the fluorescence analysis of swine wastewater (Figure d).…”

Section: Resultssupporting

confidence: 83%

“…On the other hand, the weakening of the stretching vibration peak of C−F 2 at 1180 cm −1 of the pristine membrane also confirmed the change in the composition of the membrane surface. 58 Therefore, through analysis of the chemical composition of the membrane surface components, the organic pollutants adhered to the membrane surface mainly correspond to proteins and humic acids, which is consistent with the fluorescence analysis of swine wastewater (Figure 2d). These organic compounds with amphiphilic properties could easily combine with hydrophobic membranes, causing the membrane properties to slowly transition from hydrophobic to hydrophilic and accelerating membrane functional failure.…”

Section: Mitigation Of Membrane Foulingsupporting

confidence: 81%

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Bubble Turbulent Gas-Permeable Membrane for Ammonia Recovery from Swine Wastewater: Mass Transfer Enhancement and Antifouling Mechanisms

Liu,

Wang,

Liu

et al. 2024

Environ. Sci. Technol.

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Recovering ammonium from swine wastewater employing a gas-permeable membrane (GM) has potential but suffers from the limitations of unattractive mass transfer and poor-tolerance antifouling properties. Turbulence is an effective approach to enhancing the release of volatile ammonia from wastewater while relying on interfacial disturbance to interfere with contaminant adhesion. Herein, we design an innovative gaspermeable membrane coupled with bubble turbulence (BT-GM) that enhances mass transfer while mitigating membrane fouling. Bubbles act as turbulence carriers to accelerate the release and migration of ammonia from the liquid phase, increasing the ammonia concentration gradient at the membrane−liquid interface. In comparison, the ammonium mass transfer rate of the BT-GM process applied to real swine wastewater is 38% higher than that of conventional GM (12 h). Through a computational fluid dynamics simulation, the turbulence kinetic energy of BT-GM system is 3 orders of magnitude higher than that of GM, and the effective mass transfer area is nearly 3 times that of GM. Seven batches of tests confirmed that the BT-GM system exhibits remarkable antifouling ability, broadens its adaptability to complex water quality, and practically promotes the development of sustainable resource recycling.

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Section: Resultssupporting

confidence: 83%

Section: Mitigation Of Membrane Foulingsupporting

confidence: 81%