View in EDS

Geopolymer armor-reinforced composite membranes for efficient oil–water separation and dye degradation.

Saved in:
Bibliographic Details
Title: Geopolymer armor-reinforced composite membranes for efficient oil–water separation and dye degradation.
Authors: Huang, Chunyan1 (AUTHOR), Li, Zichen1 (AUTHOR), Pan, Yuning1 (AUTHOR), Li, Zhili1 (AUTHOR), Ge, Yuanyuan1 (AUTHOR) geyy@gxu.edu.cn
Source: Chemical Engineering Journal. Mar2025, Vol. 507, pN.PAG-N.PAG. 1p.
Subjects: Copper ions, Coating processes, Composite membranes (Chemistry), Reactive oxygen species, Water pollution, Methylene blue
Abstract: A geopolymer/copper mesh composite membrane with dual functions of oil–water separation and dye degradation was prepared by applying geopolymer as an armor coating on the surface of copper mesh. [Display omitted] • The dual functional membrane was prepared by a facilitated coating process. • The geopolymer coating effectively improved the hydrophilicity of the GM/CM. • GM/CM separated over 99% for five different emulsions and degraded 98% of MB in water. • The geopolymer coating effectively inhibited copper ion leaching. Developing efficient dual functional membranes through simple methods to remove various water pollutants remains challenging. Herein, a dual functional geopolymer/copper mesh membrane (GM/CM) was fabricated by one-step coating for oil–water separation and dye degradation. The geopolymer coating, serving as armor, improved hydrophilicity and pore structure, enabling rapid pollutant adsorption and degradation via advanced oxidation processes (AOPs) while inhibiting copper ion leaching. The GM/CM had a water flux of 4936 L m−2h−1 bar−1 and demonstrated a separation efficiency of over 99 % for five different oil–water emulsions. Copper ions in GM/CM, with multiple valences, could efficiently catalyze reactive oxygen species production from H 2 O 2. In batch mode, the GM/CM + H 2 O 2 system removed 98.48 % of methylene blue (MB) in water with 1O 2 as the primary active species. Multiple anions had no significant impact on the degradation efficiency of the GM/CM + H 2 O 2 system. In filtration mode, the GM/CM + H 2 O 2 system achieved over 98 % removal of MB within a continuous 180 min period. Compared to other membranes, GM/CM had both high flux and competitive removal efficiencies. Moreover, due to the ion exchange and chelating effects of the geopolymer armor, the leaching concentration ratio of copper ions was two orders of magnitude lower than that in the unarmored catalyst CM + H 2 O 2 system, and significantly below the standard limit and the results reported in other literature. Overall, this work shows the potential application of GM/CM in water treatment and offers a new method for convenient preparation of dual functional membranes. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:A geopolymer/copper mesh composite membrane with dual functions of oil–water separation and dye degradation was prepared by applying geopolymer as an armor coating on the surface of copper mesh. [Display omitted] • The dual functional membrane was prepared by a facilitated coating process. • The geopolymer coating effectively improved the hydrophilicity of the GM/CM. • GM/CM separated over 99% for five different emulsions and degraded 98% of MB in water. • The geopolymer coating effectively inhibited copper ion leaching. Developing efficient dual functional membranes through simple methods to remove various water pollutants remains challenging. Herein, a dual functional geopolymer/copper mesh membrane (GM/CM) was fabricated by one-step coating for oil–water separation and dye degradation. The geopolymer coating, serving as armor, improved hydrophilicity and pore structure, enabling rapid pollutant adsorption and degradation via advanced oxidation processes (AOPs) while inhibiting copper ion leaching. The GM/CM had a water flux of 4936 L m−2h−1 bar−1 and demonstrated a separation efficiency of over 99 % for five different oil–water emulsions. Copper ions in GM/CM, with multiple valences, could efficiently catalyze reactive oxygen species production from H 2 O 2. In batch mode, the GM/CM + H 2 O 2 system removed 98.48 % of methylene blue (MB) in water with 1O 2 as the primary active species. Multiple anions had no significant impact on the degradation efficiency of the GM/CM + H 2 O 2 system. In filtration mode, the GM/CM + H 2 O 2 system achieved over 98 % removal of MB within a continuous 180 min period. Compared to other membranes, GM/CM had both high flux and competitive removal efficiencies. Moreover, due to the ion exchange and chelating effects of the geopolymer armor, the leaching concentration ratio of copper ions was two orders of magnitude lower than that in the unarmored catalyst CM + H 2 O 2 system, and significantly below the standard limit and the results reported in other literature. Overall, this work shows the potential application of GM/CM in water treatment and offers a new method for convenient preparation of dual functional membranes. [ABSTRACT FROM AUTHOR]
ISSN:13858947
DOI:10.1016/j.cej.2025.160876