{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:22:52Z","timestamp":1760059372115,"version":"build-2065373602"},"reference-count":51,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T00:00:00Z","timestamp":1749513600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52300040","2412025QD029"],"award-info":[{"award-number":["52300040","2412025QD029"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Central University Fund","award":["52300040","2412025QD029"],"award-info":[{"award-number":["52300040","2412025QD029"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>In chlorination disinfection treatment, residual iodinated X-ray contrast media (ICMs) are the precursors to iodinated disinfection by-products (I-DBPs). This study employed CoFe2O4 nanoparticle catalytic peracetic acid oxidation (CoFe2O4\/PAA) to remove iopamidol (IPM) and control I-DBP formation. The experimental results demonstrated that over 90% of the IPM degradation was achieved in 40 min. The metastable intermediate (\u2261Co(II)-OO(O)CCH3), rather than the alkoxyl radicals, was identified as the dominant oxidation species (ROS). The electron transfer pathways between the metastable intermediate and IPM were oxygen-atom transfer and single-electron transfer. The monoiodoacetic acid formation potential (MIAAFP) was investigated. In ultraviolet-activated ClO\u2212 (UV\/chlorine), a portion of I\u2212 generated through IPM dehalogenation underwent conversion to reactive iodine species (RIS), consequently elevating the MIAAFP. In CoFe2O4\/PAA, the MIAAFP was less than 43% of that in UV\/chlorine, which can be attributed to the complete conversion of I\u2212 into iodate IO3\u2212 without generating RIS. CoFe2O4\/PAA is thus a promising treatment for removing ICMs and controlling I-DBP formation due to the efficient degradation of ICMs while avoiding the generation of RIS.<\/jats:p>","DOI":"10.3390\/nano15120897","type":"journal-article","created":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T09:59:14Z","timestamp":1749549554000},"page":"897","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Insights into CoFe2O4\/Peracetic Acid Catalytic Oxidation Process for Iopamidol Degradation: Performance, Mechanisms, and I-DBP Formation Control"],"prefix":"10.3390","volume":"15","author":[{"given":"Haiwei","family":"Wu","sequence":"first","affiliation":[{"name":"College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiaming","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fangbo","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7232-7668","authenticated-orcid":false,"given":"Wei","family":"Fan","sequence":"additional","affiliation":[{"name":"School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Song","family":"Yang","sequence":"additional","affiliation":[{"name":"Resources and Environmental Innovation Institute, Shandong Jianzhu University, Jinan 250101, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Environment, Harbin Institute of Technology, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,6,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.1016\/j.saa.2014.10.002","article-title":"Stability indicating spectrophotometric and spectrodensitometric methods for the determination of diatrizoate sodium in presence of its degradation product","volume":"136","author":"Riad","year":"2015","journal-title":"Spectrochim. 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