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Biomimetic Nanocomposite Membranes for Efficient Acid Recovery from Cadmium Effluents
https://orcid.org/0000-0003-0731-3360
https://orcid.org/0000-0003-1317-6593
https://orcid.org/0000-0002-8924-0232
The compromise of permeability and selectivity is a central paradigm in gills by which the gill filaments perform rapid intake of oxygen (O2) and rejection of carbon dioxide (CO2) in a benign physiological environment. Such an efficient separation in nature is a key dogma in designing biomimetic separation systems, yet the fundamental challenge of the permeability–selectivity trade-off still remains a nascence. In this study, we report a gill-inspired diffusion dialysis membrane for acid recovery from heavy metal wastewater with a high permeation efficiency of acid ions (H+) and robust rejection of cadmium ions (Cd2+) plus stable performances against repeated separations. This membrane was fabricated by vacuum filtration of a nanocomposite regime featuring natural protein nanoparticles attached to the rod-shaped attapulgites. The stacking of such anisotropic building blocks endowed the membranes with capacious channels for H+ transport, while the electropositivity of proteins enabled robust rejection of Cd2+. The enhanced separation performance of this membrane mimicked the art of gills with gill arches, enlarging the specific area of gill filaments arresting O2 but expelling CO2. As a result, the membrane exhibited a high H+ dialysis coefficient (0.049 m·h–1) and H+/Cd2+ selectivity (S H/Cd = 23.3) with excellent long-term operational stability and general applicability (S H/Cu = 26.3, S H/Pb = 18.1, S H/Ca = 23.3, and S H/Mg = 18.6) suitable for practical applications.
Attapulgites and protein nanoparticles form a nanocomposite membrane for efficient acid recovery from cadmium effluents by diffusion dialysis.
Biomimetic Nanocomposite Membranes for Efficient Acid Recovery from Cadmium Effluents
https://orcid.org/0000-0003-0731-3360
https://orcid.org/0000-0003-1317-6593
https://orcid.org/0000-0002-8924-0232
The compromise of permeability and selectivity is a central paradigm in gills by which the gill filaments perform rapid intake of oxygen (O2) and rejection of carbon dioxide (CO2) in a benign physiological environment. Such an efficient separation in nature is a key dogma in designing biomimetic separation systems, yet the fundamental challenge of the permeability–selectivity trade-off still remains a nascence. In this study, we report a gill-inspired diffusion dialysis membrane for acid recovery from heavy metal wastewater with a high permeation efficiency of acid ions (H+) and robust rejection of cadmium ions (Cd2+) plus stable performances against repeated separations. This membrane was fabricated by vacuum filtration of a nanocomposite regime featuring natural protein nanoparticles attached to the rod-shaped attapulgites. The stacking of such anisotropic building blocks endowed the membranes with capacious channels for H+ transport, while the electropositivity of proteins enabled robust rejection of Cd2+. The enhanced separation performance of this membrane mimicked the art of gills with gill arches, enlarging the specific area of gill filaments arresting O2 but expelling CO2. As a result, the membrane exhibited a high H+ dialysis coefficient (0.049 m·h–1) and H+/Cd2+ selectivity (S H/Cd = 23.3) with excellent long-term operational stability and general applicability (S H/Cu = 26.3, S H/Pb = 18.1, S H/Ca = 23.3, and S H/Mg = 18.6) suitable for practical applications.
Attapulgites and protein nanoparticles form a nanocomposite membrane for efficient acid recovery from cadmium effluents by diffusion dialysis.
Biomimetic Nanocomposite Membranes for Efficient Acid Recovery from Cadmium Effluents
https://orcid.org/0000-0003-0731-3360
https://orcid.org/0000-0003-1317-6593
https://orcid.org/0000-0002-8924-0232
The compromise of permeability and selectivity is a central paradigm in gills by which the gill filaments perform rapid intake of oxygen (O2) and rejection of carbon dioxide (CO2) in a benign physiological environment. Such an efficient separation in nature is a key dogma in designing biomimetic separation systems, yet the fundamental challenge of the permeability–selectivity trade-off still remains a nascence. In this study, we report a gill-inspired diffusion dialysis membrane for acid recovery from heavy metal wastewater with a high permeation efficiency of acid ions (H+) and robust rejection of cadmium ions (Cd2+) plus stable performances against repeated separations. This membrane was fabricated by vacuum filtration of a nanocomposite regime featuring natural protein nanoparticles attached to the rod-shaped attapulgites. The stacking of such anisotropic building blocks endowed the membranes with capacious channels for H+ transport, while the electropositivity of proteins enabled robust rejection of Cd2+. The enhanced separation performance of this membrane mimicked the art of gills with gill arches, enlarging the specific area of gill filaments arresting O2 but expelling CO2. As a result, the membrane exhibited a high H+ dialysis coefficient (0.049 m·h–1) and H+/Cd2+ selectivity (S H/Cd = 23.3) with excellent long-term operational stability and general applicability (S H/Cu = 26.3, S H/Pb = 18.1, S H/Ca = 23.3, and S H/Mg = 18.6) suitable for practical applications.
Attapulgites and protein nanoparticles form a nanocomposite membrane for efficient acid recovery from cadmium effluents by diffusion dialysis.
Biomimetic Nanocomposite Membranes for Efficient Acid Recovery from Cadmium Effluents
Yu, Liyao (author) / Li, Jian (author) / Mao, Hengyang (author) / Xie, Yinshan (author) / Li, Cheng (author) / Wang, Ren (author) / Feng, Wei (author) / Wang, Tao (author)
ACS ES&T Water ; 4 ; 2848-2858
2024-07-12
Article (Journal)
Electronic Resource
English
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