Article(id=1314918668513932044, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918450573701162, 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=1746979200000, receivedDateStr=2025-05-12, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791430640580, onlineDateStr=2026-10-08, pubDate=1766160000000, pubDateStr=2025-12-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791430640580, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791430640580, creator=13701087609, updateTime=1791430640580, updator=13701087609, issue=Issue{id=1314918450573701162, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='12', pageStart='6513', pageEnd='7104', issueExtLink='null', onlineDate='null', pubDate='1766160000000', pubDateStr='2025-12-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791430588620, creator='13701087609', updateTime=1791431575400, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314922589479333965, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918450573701162, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314922589479333966, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314918450573701162, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=6924, endPage=6934, ext={EN=ArticleExt(id=1314918668719452941, articleId=1314918668513932044, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=The influence of Reynolds number variation on the instantaneous velocity and motion trajectory of microplastics in water, columnId=1240689620866887794, journalTitle=China Environmental Science, columnName=Emerging Contaminants, runingTitle=null, highlight=null, articleAbstract=

The study was initiated with the Reynolds number (Re), and three types of microplastics—polyethylene (PE), polypropylene (PP), and polystyrene (PS)—were focused on. By employing the Lagrangian method, the longitudinal instantaneous velocity and motion trajectories of microplastics in water were investigated using high-speed camera tracking and Tracker physics software, with Reynolds numbers ranging from 300 to 580 and 580 to 3500, respectively. It was observed that at very low Reynolds numbers, the motion trajectory of microplastics was approximated by a straight horizontal line, with small absolute error and standard deviation. Reynolds number reached or exceeded the critical value (575~580), transition and turbulence caused a significant increase in longitudinal instantaneous velocity. As a result, the original linear paths were deviated from by the microplastics. Overall, a normal distribution was followed by the longitudinal velocity of microplastics in water. Greater deviation from the standard normal distribution was exhibited by PS, along with more uneven instantaneous velocity fluctuations, and its travel distance in the flow direction was found to be harder to predict. In addition, the total travel distance of microplastics was increased by 0.4‰~6‰compared to straight-line motion, due to flow transition and turbulence.

, authors=Jia-chen LI1, Wei-ping LI1, Pu GUO2, Shuang-yi JING1, Zhen-yu YIN1, Zhi-chao WANG1, *, authorsList=Jia-chen LI, Wei-ping LI, Pu GUO, Shuang-yi JING, Zhen-yu YIN, Zhi-chao WANG, authorCompany=null, correspAuthors=Zhi-chao WANG, 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=1314918668987888398, articleId=1314918668513932044, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=雷诺数变化对水中微塑料瞬时速度及运动轨迹的影响, columnId=1240689621210820752, journalTitle=中国环境科学, columnName=新污染物, runingTitle=null, highlight=null, articleAbstract=

以雷诺数(Re)为切入点,以聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS)3种微塑料为研究对象.基于拉格朗日法,通过高速相机追踪和Tracker物理软件,分别研究了雷诺数范围在300~580和580~3500时,水体中微塑料纵向瞬时速度及运动轨迹的变化规律.结果表明,当雷诺数很低时,微塑料的运动轨迹近似呈水平直线,绝对误差和标准差较小;当雷诺数逐渐到达或超越临界雷诺数时(575~580),转捩及扰动使微塑料的纵向瞬时速度有更大的增长趋势,并且微塑料偏离原有的直线运动轨迹.总体上,微塑料在水中的纵向速度分布遵循正态分布,而PS更远离标准正态分布,瞬时速度变化更不均匀,其在水中运动的距离和主流方向位移之间的关系更加难以推测.此外,因水流转捩及扰动使微塑料在水中运动的总距离相较于直线增加了0.4‰~6‰.

, authors=李嘉辰1, 李卫平1, 郭普2, 敬双怡1, 殷震育1, 王志超1, *, authorsList=李嘉辰, 李卫平, 郭普, 敬双怡, 殷震育, 王志超, authorCompany=null, correspAuthors=王志超, authorNote=

李嘉辰(2000-),男,北京人,硕士研究生,主要从事新污染物环境迁移研究..

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* 责任作者,副教授,
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李嘉辰(2000-),男,北京人,硕士研究生,主要从事新污染物环境迁移研究..

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李嘉辰(2000-),男,北京人,硕士研究生,主要从事新污染物环境迁移研究..

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雷诺数变化对水中微塑料瞬时速度及运动轨迹的影响
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李嘉辰 1 , 李卫平 1 , 郭普 2 , 敬双怡 1 , 殷震育 1 , 王志超 1, *
中国环境科学 | 新污染物 2025,45(12): 6924-6934
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中国环境科学 |新污染物 2025 , 45 (12) : 6924 -6934
雷诺数变化对水中微塑料瞬时速度及运动轨迹的影响
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李嘉辰1 , 李卫平1, 郭普2, 敬双怡1, 殷震育1, 王志超1, *
作者信息
  • 1.内蒙古科技大学能源与环境学院,黄河流域内蒙古段生态保护与综合利用自治区协同创新中心,内蒙古 包头 014010
  • 2.内蒙古黄河镫口灌区管理中心,内蒙古 包头 014010
通讯作者:
* 责任作者,副教授,
作者简介:

李嘉辰(2000-),男,北京人,硕士研究生,主要从事新污染物环境迁移研究..

The influence of Reynolds number variation on the instantaneous velocity and motion trajectory of microplastics in water
Jia-chen LI1 , Wei-ping LI1, Pu GUO2, Shuang-yi JING1, Zhen-yu YIN1, Zhi-chao WANG1, *
Affiliations
  • 1.School of Energy and Environment, Inner Mongolia University of Science and Technology, Autonomous Region Level Ecological Protection and Comprehensive Utilization Cooperative Innovation Center for the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China
  • 2.Inner Mongolia Yellow River Dengkou Irrigation District Management Center, Baotou 014010, China
出版时间: 2025-12-20
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以雷诺数(Re)为切入点,以聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS)3种微塑料为研究对象.基于拉格朗日法,通过高速相机追踪和Tracker物理软件,分别研究了雷诺数范围在300~580和580~3500时,水体中微塑料纵向瞬时速度及运动轨迹的变化规律.结果表明,当雷诺数很低时,微塑料的运动轨迹近似呈水平直线,绝对误差和标准差较小;当雷诺数逐渐到达或超越临界雷诺数时(575~580),转捩及扰动使微塑料的纵向瞬时速度有更大的增长趋势,并且微塑料偏离原有的直线运动轨迹.总体上,微塑料在水中的纵向速度分布遵循正态分布,而PS更远离标准正态分布,瞬时速度变化更不均匀,其在水中运动的距离和主流方向位移之间的关系更加难以推测.此外,因水流转捩及扰动使微塑料在水中运动的总距离相较于直线增加了0.4‰~6‰.

微塑料  /  雷诺数  /  瞬时速度  /  运动轨迹

The study was initiated with the Reynolds number (Re), and three types of microplastics—polyethylene (PE), polypropylene (PP), and polystyrene (PS)—were focused on. By employing the Lagrangian method, the longitudinal instantaneous velocity and motion trajectories of microplastics in water were investigated using high-speed camera tracking and Tracker physics software, with Reynolds numbers ranging from 300 to 580 and 580 to 3500, respectively. It was observed that at very low Reynolds numbers, the motion trajectory of microplastics was approximated by a straight horizontal line, with small absolute error and standard deviation. Reynolds number reached or exceeded the critical value (575~580), transition and turbulence caused a significant increase in longitudinal instantaneous velocity. As a result, the original linear paths were deviated from by the microplastics. Overall, a normal distribution was followed by the longitudinal velocity of microplastics in water. Greater deviation from the standard normal distribution was exhibited by PS, along with more uneven instantaneous velocity fluctuations, and its travel distance in the flow direction was found to be harder to predict. In addition, the total travel distance of microplastics was increased by 0.4‰~6‰compared to straight-line motion, due to flow transition and turbulence.

microplastics  /  Reynolds number  /  instantaneous speed  /  trajectory
李嘉辰, 李卫平, 郭普, 敬双怡, 殷震育, 王志超. 雷诺数变化对水中微塑料瞬时速度及运动轨迹的影响. 中国环境科学, 2025 , 45 (12) : 6924 -6934 .
Jia-chen LI, Wei-ping LI, Pu GUO, Shuang-yi JING, Zhen-yu YIN, Zhi-chao WANG. The influence of Reynolds number variation on the instantaneous velocity and motion trajectory of microplastics in water[J]. China Environmental Science, 2025 , 45 (12) : 6924 -6934 .
  • 内蒙古自治区自然科学基金资助项目(2023MS05016)
  • 内蒙古自治区科技计划项目(2023KJHZ0026)
  • 内蒙古自治区直属高校基本科研业务费项目(2023YXXS025)
  • 国家留学基金资助项目(202308150174)
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  • 接收时间:2025-05-12
  • 首发时间:2026-10-08
  • 出版时间:2025-12-20
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  • 收稿日期:2025-05-12
基金
内蒙古自治区自然科学基金资助项目(2023MS05016)
内蒙古自治区科技计划项目(2023KJHZ0026)
内蒙古自治区直属高校基本科研业务费项目(2023YXXS025)
国家留学基金资助项目(202308150174)
作者信息
    1.内蒙古科技大学能源与环境学院,黄河流域内蒙古段生态保护与综合利用自治区协同创新中心,内蒙古 包头 014010
    2.内蒙古黄河镫口灌区管理中心,内蒙古 包头 014010

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* 责任作者,副教授,
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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