DOAJ Open Access 2025

Recovery of nitrate and fluoride salts from stainless steel pickling wastewater with flow-electrode capacitive deionization

Niklas Köller Dustin Roedder Christian J. Linnartz Mark Enders Florian Morell +2 lainnya

Abstrak

Flow-electrode Capacitive Deionization (FCDI) is an innovative method for practical salt removal and recycling applications. Here, we report that FCDI facilitates the recovery of nitrate and fluoride salts from brines produced during the wastewater treatment process in a stainless steel pickling line. Laboratory-scale experiments with synthetic wastewaters were used to evaluate the influence of (a) the membrane thickness, (b) feed flow rates, and (c) applied voltage on the outlet concentrations and the average salt transfer rate. In continuous single-pass experiments, the flow rates of diluate and concentrate have the greatest influence on the resulting outlet concentrations in the FCDI process as they directly influence the residence time. The operating voltage of the FCDI process can be varied to increase the ratio of fluoride over nitrate for recycling.

Topik & Kata Kunci

Hazardous substances and their disposal

Penulis (7)

Niklas Köller

Dustin Roedder

Christian J. Linnartz

Mark Enders

Florian Morell

Patrick Altmeier

Matthias Wessling

Format Sitasi

APA MLA BibTeX

Köller, N., Roedder, D., Linnartz, C.J., Enders, M., Morell, F., Altmeier, P. et al. (2025). Recovery of nitrate and fluoride salts from stainless steel pickling wastewater with flow-electrode capacitive deionization. https://doi.org/10.1016/j.hazl.2025.100148

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1016/j.hazl.2025.100148
Akses: Open Access ✓