Article(id=1314917739622396833, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, 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=1735574400000, receivedDateStr=2024-12-31, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791430419116, onlineDateStr=2026-10-08, pubDate=1755619200000, pubDateStr=2025-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791430419116, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791430419116, creator=13701087609, updateTime=1791430419116, updator=13701087609, issue=Issue{id=1314917704910340427, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='8', pageStart='4145', pageEnd='4736', issueExtLink='null', onlineDate='null', pubDate='1755619200000', pubDateStr='2025-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791430410840, creator='13701087609', updateTime=1791431909627, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314923991341555972, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314923991345750277, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917704910340427, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=4398, endPage=4409, ext={EN=ArticleExt(id=1314917739865666466, articleId=1314917739622396833, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=Characterization of dissolved organic matter and its heavy metal binding potential at typical cross-sections of the Tuhai River, columnId=1234106386360103680, journalTitle=China Environmental Science, columnName=Water Pollution Control, runingTitle=null, highlight=null, articleAbstract=

Surface water samples were collected from two municipally monitored sections of the Tuhai River in Liaocheng—Li Fengtao and Lao Nanzhen—and analyzed using a combination of spectroscopic techniques, including ultraviolet-visible (UV-Vis) absorption and three-dimensional excitation-emission matrix (EEM) fluorescence spectroscopy, supplemented by ultrafiltration fractionation and fluorescence-quenching experiments to comprehensively characterize dissolved organic matter (DOM). The study investigated seasonal variations in DOM composition across three molecular weight fractions (<0.7μm, 0.7μm~1kDa, and<1kDa) and explored the underlying mechanisms of DOM-Cu²⁺ complexation. The specific ultraviolet absorbance at 254nm (SUVA254) was significantly higher at Li Fengtao (0.33 ± 0.01) than at Lao Nanzhen (0.30 ± 0.01) (P<0.05), suggesting a higher proportion of smaller, non-aromatic molecules at the latter site. Parallel factor analysis (PARAFAC) of EEM data identified five fluorescent components, including three humic-like (C1, C2, C4) and two protein-like (C3, C5) substances, with humic-like constituents dominating at both locations. Total fluorescence intensity (F_max) was higher at Lao Nanzhen, and dissolved organic carbon (DOC) was primarily concentrated in the <1kDa fraction at both sites. Two-dimensional correlation spectroscopy (2D-COS) analysis demonstrated that humic-like components preferentially bound to Cu²⁺ in the unfractionated DOM samples from both locations. However, after ultrafiltration fractionation, the binding sequence shifted, with protein-like components becoming the dominant Cu²⁺-binding constituents. Furthermore, high-molecular-weight fractions (excluding C1 and C4) from both sites exhibited relatively strong metal-binding capacities, as evidenced by their conditional stability constants (logK_Cu:(3.08 ± 0.08) to (3.62 ± 0.02)).

, authors=Shan-shan WANG¹, Dong-ling SANG¹, Qiang LIU², Xin YAO^{1, *}, Zhao-li SUN¹, Jia-zheng ZHANG¹, Chen ZHANG¹, Ting-ting LI¹, authorsList=Shan-shan WANG, Dong-ling SANG, Qiang LIU, Xin YAO, Zhao-li SUN, Jia-zheng ZHANG, Chen ZHANG, Ting-ting LI, authorCompany=null, correspAuthors=Xin YAO, 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=1314917740595475364, articleId=1314917739622396833, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=徒骇河典型断面DOM特征及重金属结合能力, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

选取徒骇河聊城河段的2个典型市控断面——李凤桃与老南镇断面进行表层水样采集，利用紫外可见吸收光谱和三维荧光光谱等多种光谱分析手段，并结合超滤技术及荧光淬灭实验，探究不同季节和不同分子量（<0.7μm、0.7μm~1kDa、<1kDa）DOM的特征差异及其与重金属（Cu²⁺）相互作用的机制．结果表明，李凤桃SUVA₂₅₄值（0.33±0.01）显著高于老南镇（0.30±0.01）（P<0.05），表明老南镇分布着更多的小分子和非芳香性物质．研究基于EEM-PARAFAC共识别出了5个组分，包括3个类腐殖质组分（C1、C2、C4）和2个类蛋白质组分（C3、C5），其中类腐殖质组分在两断面的DOM中占主导地位．老南镇DOM总荧光强度（F_max）高于李凤桃，且两断面溶解性有机碳（DOC）主要储存在低分子量DOM（<1kDa）中．在DOM与Cu²⁺的结合过程中，二维相关光谱（2D-COS）表明老南镇和李凤桃断面DOM类腐殖质优先与Cu²⁺络合；分馏后，两断面DOM的结合序列发生了变化（类蛋白质优先与Cu²⁺发生络合）．此外，在两断面DOM中，高分子量组分（除C1和C4外）具有较高的金属结合能力（logK_Cu：（3.08±0.08）~（3.62±0.02））．

, authors=王珊珊¹, 桑冬玲¹, 刘强², 姚昕^{1, *}, 孙赵利¹, 张家政¹, 张晨¹, 李婷婷¹, authorsList=王珊珊, 桑冬玲, 刘强, 姚昕, 孙赵利, 张家政, 张晨, 李婷婷, authorCompany=null, correspAuthors=姚昕, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=KApwCsG9TQJv4TirZ7OX1Q==, magXml=elVENFFNOkwXkUnHSUK7kw==, pdfUrl=null, pdf=lGI1q1tC120GddNG5XQQFg==, pdfFileSize=2905384, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=JrLIVIigI9SCZ0QyvvYCag==, mapNumber=null, fund=null)}, authors=[Author(id=1314917742512272301, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917739622396833, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2398206288@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314917742625518511, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917739622396833, authorId=1314917742512272301, language=EN, stringName=Shan-shan WANG, firstName=Shan-shan, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.School of Geography and Environment, Liaocheng University, Liaocheng 252059, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1314917742713598896, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917739622396833, authorId=1314917742512272301, language=CN, stringName=王珊珊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.聊城大学地理与环境学院，山东 聊城 252059, bio={"content":"

王珊珊（2001-），女，山东菏泽人，硕士研究生，主要研究方向为不同分子量DOM与污染物的络合机制．发表论文2篇．2398206288@qq.com.

"}, bioImg=null, bioContent=

王珊珊（2001-），女，山东菏泽人，硕士研究生，主要研究方向为不同分子量DOM与污染物的络合机制．发表论文2篇．2398206288@qq.com.

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