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Surface sediments of Dongting Lake were selected as the research object and the concentrations of non-extractable polycyclic aromatic hydrocarbons (PAHs) in the samples were analyzed using a combination of silanization and acidification methods. The study aims to investigate the impact of non-extractable residues on the pollution levels and source analysis of PAHs. The inclusion of non-extractable residues significantly altered the concentration and compositional characteristics of PAHs in the samples, raising the proportions of 3-ring PAHs from (19.78% ± 8.80%) in extractable fractions to (32.97% ± 11.16%) in total concentrations. The proportions of non-extractable PAHs did not exhibit a significant strong correlation with organic carbon or particle size, but were more affected by the total concentration of targets and pollution sources. Source apportionment results revealed that, after considering non-extractable residues, the main pollution sources shifted from traffic emissions (46.91%) to biomass and coal combustion sources (40.70%). The non-extractable residues play an important role in the source analysis of PAHs.

, authors=Er-xuan HAN¹, Xiao-shui LI^{1, *}, Shi-bin QIN², Wei-jie LIU³, Huan LI³, Zi-yang YE¹, Shi-hua QI^{1, 3}, authorsList=Er-xuan HAN, Xiao-shui LI, Shi-bin QIN, Wei-jie LIU, Huan LI, Zi-yang YE, Shi-hua QI, authorCompany=null, correspAuthors=Xiao-shui LI, 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=1314917594629497645, articleId=1314917592251327275, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=沉积物中PAHs不可萃取组分及其对源解析的影响, columnId=1234106388268503686, journalTitle=中国环境科学, columnName=环境生态, runingTitle=null, highlight=null, articleAbstract=

以洞庭湖表层沉积物为研究对象，通过硅烷化与酸化组合法分析了样品中多环芳烃（PAHs）的不可萃取组分浓度，探究其对PAHs污染及来源解析研究的影响．结果表明，PAHs不可萃取组分的引入显著改变了样品中PAHs的浓度和组成特征，使3环PAHs的占比由可萃取组分中的（19.78%±8.80%）升高到总浓度中的（32.97%±11.16%）．PAHs不可萃取组分占比与有机碳和粒度未呈现显著强相关性，更多是受目标物总浓度和污染来源的影响．来源解析表明，考虑不可萃取组分后，主要污染来源由交通排放源（46.91%）转变为生物质和煤炭燃烧源（40.70%）．不可萃取组分对PAHs来源解析具有重要作用．

, authors=韩尔瑄¹, 李小水^{1, *}, 秦世斌², 刘威杰³, 李欢³, 叶子杨¹, 祁士华^{1, 3}, authorsList=韩尔瑄, 李小水, 秦世斌, 刘威杰, 李欢, 叶子杨, 祁士华, authorCompany=null, correspAuthors=李小水, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=vpSwx/ejrR3pfL/I6hF0Fw==, magXml=D9hnrDbHQn/GnVC+XNYzBQ==, pdfUrl=null, pdf=Ko7qeqFSzmqQ2L+eWxeG2Q==, pdfFileSize=1427992, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=Wuz5KrvVR23DqVQ3cB7gww==, mapNumber=null, fund=null)}, authors=[Author(id=1314917595409638203, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917592251327275, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=Han_erxuan@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314917595556438845, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917592251327275, authorId=1314917595409638203, language=EN, stringName=Er-xuan HAN, firstName=Er-xuan, middleName=null, lastName=HAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences (Wuhan), Wuhan 430074, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1314917595623547710, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917592251327275, authorId=1314917595409638203, language=CN, stringName=韩尔瑄, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.中国地质大学（武汉）地质微生物与环境全国重点实验室，湖北 武汉 430074, bio={"content":"

韩尔瑄（2000-），女，山西临汾人，中国地质大学（武汉）硕士研究生，主要从事有机污染物环境地球化学方向研究．发表论文1篇．Han_erxuan@163.com.

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韩尔瑄（2000-），女，山西临汾人，中国地质大学（武汉）硕士研究生，主要从事有机污染物环境地球化学方向研究．发表论文1篇．Han_erxuan@163.com.

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