In a significant stride towards sustainable wastewater treatment, researchers have developed a highly porous membrane using borosilicate glass, demonstrating remarkable efficiency in copper removal from acidic solutions. This innovation, led by Diana Lago of the FunGlass Centre at Alexander Dubček University of Trenčín in Slovakia, opens new avenues for addressing environmental challenges in the energy sector and beyond.
The process involves activating Duran-type borosilicate glass with a weak alkali solution, creating a porous structure that excels in adsorbing copper from aqueous media. “The incorporation of fine glass powder enhances the glass network’s reactivity, promoting the dissolution and subsequent polymerization of glass constituents,” explains Lago. This reaction, followed by low-temperature curing at 40°C, results in a stable and highly effective membrane.
The membrane’s performance is notably influenced by the pH of the solution. Treated in boiling water, these membranes can remove between 92% and 99% of copper (II) at pH levels 2 and 5, respectively. In comparison, untreated samples achieve up to 65% copper (II) removal at pH 2. This variability underscores the need for tailored strategies to optimize membrane performance across different pH conditions.
The implications for the energy sector are substantial. Copper contamination is a common issue in industrial wastewater, particularly in mining, metallurgy, and energy production. Effective removal of copper not only mitigates environmental impact but also facilitates water reuse, a critical consideration in water-stressed regions. The ability to adjust the membrane’s adsorption capacity through surface treatment offers a flexible solution for diverse industrial applications.
“This research highlights the potential of alkali-activated borosilicate glass membranes in addressing copper contamination in acidic wastewater,” says Lago. “The findings pave the way for further exploration and optimization of these membranes for real-world industrial applications.”
Published in the journal ‘Developments in the Built Environment’ (translated from the original title), this study represents a significant advancement in the field of environmental technology. As industries increasingly prioritize sustainability and regulatory compliance, innovations like these will play a pivotal role in shaping the future of wastewater treatment and resource recovery.
The research not only offers a promising solution for copper removal but also sets the stage for further advancements in membrane technology. By understanding and leveraging the interplay between material properties and environmental conditions, scientists and engineers can develop more efficient and adaptable solutions for a wide range of industrial challenges. This work is a testament to the power of interdisciplinary research in driving progress towards a more sustainable future.