Article(id=1314918267551048651, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918247384834796, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1740672000000, receivedDateStr=2025-02-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791430544983, onlineDateStr=2026-10-08, pubDate=1760889600000, pubDateStr=2025-10-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791430544983, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791430544983, creator=13701087609, updateTime=1791430544983, updator=13701087609, issue=Issue{id=1314918247384834796, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='10', pageStart='5329', pageEnd='5920', issueExtLink='null', onlineDate='null', pubDate='1760889600000', pubDateStr='2025-10-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791430540175, creator='13701087609', updateTime=1791431660009, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314922944367784036, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918247384834796, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314922944367784037, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918247384834796, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=5471, endPage=5479, ext={EN=ArticleExt(id=1314918267760763852, articleId=1314918267551048651, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=Effect of sulfidation time on the surface properties and the dechlorination performance of ethanol-phase H₂S sulfidated nanoscale zero-valent iron, columnId=1234106386360103680, journalTitle=China Environmental Science, columnName=Water Pollution Control, runingTitle=null, highlight=null, articleAbstract=

This study employed H₂S in an ethanol-phase as a sulfidation reagent to synthesize sulfidated nanoscale zero-valent iron (S-nZVI-H₂S-Ethanol) through a liquid-phase chemical reduction approach. A systematic investigation was conducted to examine the effects of sulfidation time duration on the material's surface characteristics, electrochemical properties, hydrogen suppression capability, and dechlorination performance. The results revealed that prolonged sulfidation treatment led to the formation of flake-like iron-sulfur compounds(FeSx) on the particle surfaces, accompanied by a significant increase in specific surface area. XPS analysis demonstrated a non-monotonic relationship between sulfidation time and surface composition: Fe-S content initially increased before decreasing, while Fe-O content exhibited the inverse trend. Electrochemical characterization indentified the S-nZVI-H₂S-Ethanol(S12h) exhibited optimal performance, with the lowest charge transfer impedance and the lowest corrosion potential (-0.923V), suggesting enhanced electron transfer efficiency and reductive capacity. Hydrogen evolution experiments confirmed that sulfidation effectively suppressed the hydrogen evolution reaction, with the hydrogen generation rate decreasing initially before stabilizing with extended treatment time. In TCE dechlorination experiments, both nZVI and S-nZVI-H₂S-Ethanol followed pseudo-first-order kinetics, demonstrating markedly higher apparent rate constants (kb: 1.4/h, 0.81/h, and 0.48/h for S2h, S12h, and S24h, respectively) compared to pristine nZVI (0.025/h). The degradation product distribution of trichloroethylene revealed that the degradation pathways were governed by competing β-elimination and hydrogenation reactions, yielding primarily acetylene, ethylene, ethane, and long-chain hydrocarbons (C₃-C₆). These results collectively demonstrated that ethanol-phase H₂S sulfidation significantly enhances nZVI's degradation performance. The comprehensive examination of S-nZVI-H₂S-Ethanol's surface properties and dechlorination efficiency across varying sulfidation durations provides crucial insights for optimizing material design in environmental remediation applications.

, authors=Xiao-yuan LI, Yi-rong DENG^*, He-li WANG, Jian WU, Hai-jian LU, authorsList=Xiao-yuan LI, Yi-rong DENG, He-li WANG, Jian WU, Hai-jian LU, authorCompany=null, correspAuthors=Yi-rong DENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314918268171805645, articleId=1314918267551048651, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=硫化时间对硫化氢硫化纳米零价铁颗粒表面性质及其脱氯效果的研究, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

以乙醇相硫化氢为硫化试剂，通过液相化学还原法制备了硫化纳米零价铁（S-nZVI-H₂S-Ethanol），并系统研究了硫化时间对其表面性质、电化学性能、抑氢性能及脱氯效果．结果表明，随着硫化处理时间的增加，表面生成鳞片状铁硫化合物（FeSx），颗粒比表面积显著增加，XPS分析表明，硫化处理处理时间的增加，颗粒表面Fe-S含量呈现先增加后降低的趋势，Fe-O含量则相反．电化学分析结果显示，S12h的S-nZVI-H₂S-Ethanol的电荷转移阻抗最小，腐蚀电位（-0.923V）最低，说明不同硫化时间的颗粒呈现不同的电子传输效率和还原能力．析氢实验表明，硫化处理显著抑制了析氢反应，析氢速率随硫化时间延长先降低后趋于稳定．三氯乙烯（TCE）脱氯实验表明，nZVI和S-nZVI-H₂S-Ethanol的脱氯反应均符合伪一级动力学模型，S2h、S12h和S24h的表观动力学常数（k_obs）分别为1.4/h、0.81/h和0.48/h，显著高于nZVI（0.025/h）．通过β-消除反应和氢化反应影响降解过程中产物分布，降解产物主要为乙炔、乙烯、乙烷和长链烃（C₃-C₆）．综上，乙醇相硫化氢硫化处理显著提升了nZVI的降解性能，不同硫化时间的S-nZVI-H₂S-Ethanol的颗粒表面性质及其脱氯效果研究为优化材料在环境修复中的性能提供了重要依据．

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李晓源（1995-），女，广东茂名人，工程师，硕士，主要从事土壤与地下水环境管理与修复．发表论文8篇．ecoxyli@163.com.

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李晓源（1995-），女，广东茂名人，工程师，硕士，主要从事土壤与地下水环境管理与修复．发表论文8篇．ecoxyli@163.com.

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