{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T17:26:45Z","timestamp":1787074005941,"version":"build-2736575974"},"reference-count":86,"publisher":"American Chemical Society (ACS)","issue":"32","license":[{"start":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:00:00Z","timestamp":1786320000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:00:00Z","timestamp":1786320000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:00:00Z","timestamp":1786320000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-045"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42377007"],"award-info":[{"award-number":["42377007"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100014219","name":"National Science Foundation for Distinguished Young Scholars","doi-asserted-by":"crossref","award":["42125703"],"award-info":[{"award-number":["42125703"]}],"id":[{"id":"10.13039\/501100014219","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,18]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Sulfide oxidation mediated by pyrogenic carbon (PyC) is critical for initiating reactive oxygen species (ROS) generation in subsurface systems. Nitrogen-rich pyrogenic carbon (N-PyC), containing abundant heterocyclic N, serves as a highly reactive component of the PyC pool; yet, its role in regulating sulfide oxidation remains unclear. The study systematically investigated the overlooked role of N-PyC in dark \u2022OH generation during sulfide oxidation. Compared to counterpart PyC, N-PyC significantly increased \u2022OH production during sulfide oxidation by \u223c2\u20133 times, elevating pollutant degradation efficiencies in soils by &amp;gt;50%. Spectroscopic and electron paramagnetic resonance analyses revealed a novel electron transfer pathway mediated by N-PyC, which effectively facilitated the formation and subsequent propagation of polysulfide radicals. Unlike the previously reported two-electron transfer mechanisms on conductive graphitic domains, these polysulfide radicals induced by N-PyC enhanced \u2022OH generation by &amp;gt;80% via a single-electron transfer mechanism with oxygen, as evidenced by electrochemical results. Theoretical calculations demonstrated that pyridinic N thermodynamically promoted the binding and homolytic cleavage of reactive sulfur structures by 0.7 and 0.13 eV, respectively, thereby activating polysulfide radicals. Soil incubations confirmed a significant positive correlation between N-PyC-mediated sulfide oxidation and \u2022OH production in natural sulfide-rich zones (R2 = 0.87, p &amp;lt; 0.01). This study reveals a polysulfide radical-mediated electron transfer pathway for \u2022OH formation, offering insights into the biogeochemical processes of sulfide oxidation and the involved ROS dynamics in pyrogenic-impacted environments.<\/jats:p>","DOI":"10.1021\/acs.est.6c05216","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T07:02:07Z","timestamp":1786345327000},"page":"22517-22529","source":"Crossref","is-referenced-by-count":0,"title":["Nitrogen-Rich\nPyrogenic Carbon-Induced Hydroxyl Radical\nGeneration During Sulfide Oxidation: An Unrecognized Polysulfide Radical\nChain Propagation Mechanism"],"prefix":"10.1021","volume":"60","author":[{"given":"Wanting","family":"Huang","sequence":"first","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huanxin","family":"Ma","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wendan","family":"Luo","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2339-2986","authenticated-orcid":true,"given":"Yalan","family":"Chen","sequence":"additional","affiliation":[{"name":"Beijing Normal University , , ,","place":["Beijing, China, 100875"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7928-7865","authenticated-orcid":true,"given":"Chunhua","family":"Feng","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1721-5369","authenticated-orcid":true,"given":"Zhenqing","family":"Shi","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi","family":"Dang","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0425-7754","authenticated-orcid":true,"given":"Ke","family":"Sun","sequence":"additional","affiliation":[{"name":"Beijing Normal University , , ,","place":["Beijing, China, 100875"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-5205-2083","authenticated-orcid":true,"given":"Shishu","family":"Zhu","sequence":"additional","affiliation":[{"name":"South China University of Technology , , ,","place":["Guangzhou, China, 510006"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,8,10]]},"reference":[{"issue":"36","key":"2026081810423629400_cit1","doi-asserted-by":"publisher","first-page":"15910","DOI":"10.1021\/acs.est.4c07027","article-title":"From Bulk to Nano: Formation, Features, and Functions\nof Nano-Black Carbon in Biogeochemical Processes","volume":"58","author":"Lian","year":"2024","journal-title":"Environ. 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