Abstract
It remains critically challenging for highly efficient recycling of hazardous solid state sludges and economic treatment of wastewaters in one protocol. Herein, we proposed a waste-to-resource strategy for rational design of spinel ceramic membranes, simultaneously addressing the issues of copper-bearing waste recycling and oily wastewater treatment. A spinel phase conversion mechanism was proposed based on via qualitative and quantitative X-ray diffraction techniques, indicating that spinel was steadily formed through the reactions between copper oxide and alumina (major) or mullite (minor) at 970–1060 °C. Then, spinning and sintering parameters were systematically studied to rationally tailor membrane structure and properties such as morphology, porosity, pore size, permeability and mechanical strength. With rational structure design, the spinel-based ceramic membranes showed superhydrophilicity and underwater superoleophobicity, enabling enhanced flux with mitigated oil fouling especially for light oils. Even for heavy oils, permeate flux was enhanced with mitigated fouling at alkaline conditions. Efficient separation was achieved for not only synthetic oily emulsion but real wastewater. This study demonstrates the feasibility of recycling hazardous metal-bearing sludges into functional ceramic membranes for water treatment applications, offering a promising sustainable waste-to-resource protocol.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
