Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.jhazmat.2026.143605 |
Lizenz  |
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| Titel (primär) | Mechanistic insights into electrosorption of diverse organic compounds Is the molecular structure a barrier? |
| Autor | Fatehbasharzad, P.; Saeidi, N.; Krauss, M.
; Presser, V.; Georgi, A. |
| Quelle | Journal of Hazardous Materials |
| Erscheinungsjahr | 2026 |
| Department | EXPO; TECH |
| Seite von | art. 143605 |
| Sprache | englisch |
| Topic | T7 Bioeconomy T9 Healthy Planet |
| Supplements | Supplement 1 |
| Keywords | PMT compounds; Activated carbon; Electrochemistry; Surface modification; Adsorption |
| Abstract | Electrosorption
is a promising strategy for removing ionic organic pollutants and
in-situ adsorbent regeneration; however, a lack of mechanistic
understanding hinders its broader application. This study systematically
investigates the potential-dependent adsorption of 21 structurally
diverse persistent, mobile, and potentially toxic compounds (PMs/PMTs),
spanning cationic, anionic, zwitterionic, and neutral species with and
without aromatic moieties. Experiments were conducted at trace
concentrations in realistic tap water matrix using activated carbon felt
electrodes with tailored surface chemistries across a potential range
of -1 V to +1 V (vs. Ag/AgCl). Results demonstrate that electrosorption
is governed by superimposed electrostatic and non-electrostatic
interactions, strongly modulated by molecular structure. Non-aromatic
ions exhibit electrostatically dominated behavior, following bell-shaped
curves with maxima at moderate opposite-charge potentials, with
adsorption coefficients (Kd) varying by up to 5 log units. In
contrast, aromatic compounds show enhanced adsorption under cathodic
polarization regardless of charge, indicating potential-induced
strengthening of π–π interactions. Oxygen-rich surface chemistries
attenuate these effects, limiting Kd variations to ≤2 orders
of magnitude. Desorption hysteresis in aromatic species identifies a
critical boundary for electrode regenerability, suggesting tailored
designs for aromatic vs. non-aromatic fractions. This work provides a
foundation for the predictive design of electrosorption processes in
realistic water treatment scenarios. |
| Fatehbasharzad, P., Saeidi, N., Krauss, M., Presser, V., Georgi, A. (2026): Mechanistic insights into electrosorption of diverse organic compounds Is the molecular structure a barrier? J. Hazard. Mater. , art. 143605 10.1016/j.jhazmat.2026.143605 |
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