Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.jece.2026.122169 |
| Title (Primary) | Efficient removal of perchlorate by a quaternary ammonium-functionalized hydrogel: Performance and mechanisms |
| Author | Guo, Y.; Xia, S.; Shi, Z.; Deng, L.; Zhang, H.
|
| Source Titel | Journal of Environmental Chemical Engineering |
| Year | 2026 |
| Department | TECH |
| Volume | 14 |
| Issue | 3 |
| Page From | art. 122169 |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Supplements | Supplement 1 |
| Keywords | Perchlorate; Hydrogel; Adsorption; Quaternary ammonium; Water treatment |
| Abstract | Perchlorate (ClO4⁻) is a persistent and hazardous water pollutant that disrupts thyroid function. Hydrogels, with their tunable functionality and high capacity, offer a promising alternative, but their application for perchlorate removal remains largely unexplored. A novel hydrogel was synthesized via free-radical copolymerization of methacryloxyethyl trimonium chloride (MTAC) and N, N’-methylenebis (acrylamide) (MBA). The material was characterized using SEM, EDS, FTIR, XRD, and XPS. The MTAC hydrogel exhibited a high adsorption capacity for ClO4⁻, with experimental data best fitted by the Langmuir isotherm, showing a maximum capacity of 425.22 mg/g at 298 K. The adsorption process is primarily driven by strong electrostatic interactions from quaternary amine groups, supplemented by ion exchange and hydrogen bonding. The adsorption energy reached −3.59 eV. The adsorption process was fast, spontaneous, and exothermic, remaining effective over a wide pH range (5–9) and in the presence of common competing anions. The hydrogel demonstrated excellent regenerability over five cycles. MTAC/Sodium alginate (SA) beads were used in fixed bed packing, which achieved a treatment capacity of 5346 bed volumes, reducing ClO4⁻ from 500 μg/L to below the drinking water standard (70 μg/L). Furthermore, the column facilitated easy regeneration and exhibited an enrichment factor as high as 122.9 fold. This work successfully developed a MTAC-based hydrogel for the removal of ClO4⁻. The hydrogel demonstrated high capacity and regenerability in real water samples and column experiments, making it an ideal candidate material for practical end-of-pipe water treatment applications. |
| Guo, Y., Xia, S., Shi, Z., Deng, L., Zhang, H. (2026): Efficient removal of perchlorate by a quaternary ammonium-functionalized hydrogel: Performance and mechanisms J. Environ. Chem. Eng. 14 (3), art. 122169 10.1016/j.jece.2026.122169 |
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