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3-aminopropyltriethoxysilane (KH550) was used to modify Fh, yielding organosilane-modified ferrihydrite (KH-Fh). The Pb(Ⅱ) adsorption performance and underlying mechanisms of KH-Fh were systematically explored.Results demonstrate that the modification successfully introduced Si-OH and -NH2 functional groups onto the Fh surface, enhancing the maximum adsorption capacity from 50.51mg/g of the unmodified Fh to 102.85mg/g of KH-Fh, representing a 103.6% increase. Adsorption kinetics and isotherm studies indicate that the adsorption processes of both Fh and KH-Fh for Pb(Ⅱ) conform to the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting that chemisorption is the dominant mechanism. The positive value of the thermodynamic parameter ΔH indicates that elevated temperatures promote the adsorption reaction. Compared with unmodified Fh, KH-Fh maintains higher and more stable adsorption efficiency across a wide pH range (3.0~7.0) and is less affected by ionic strength and common coexisting ions (Na+, K+, Ca2+). X-ray photoelectron spectroscopy (XPS) analysis confirms that Pb(Ⅱ) is immobilized through coordination with Si-OH, Fe-OH, and -NH2 functional groups on the surface of KH-Fh, significantly enhancing the adsorption stability. These results offer novel theoretical insights and practical guidance for the functional modification of iron oxides and the remediation of Pb(Ⅱ)-contaminated environments.

, authors=Lin CAI1, Cheng-feng JIANG2, Xin-yu YAN1, Shuang-lian XIONG1, Shu-xin TU1, *, authorsList=Lin CAI, Cheng-feng JIANG, Xin-yu YAN, Shuang-lian XIONG, Shu-xin TU, authorCompany=null, correspAuthors=Shu-xin TU, 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=1314918373562081855, articleId=1314918373180400189, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=硅烷偶联剂改性水铁矿对Pb(Ⅱ)的吸附增效机制, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

以3-氨基丙基三乙氧基硅烷(KH550)改性水铁矿,制备有机硅烷改性水铁矿(KH-Fh),并系统探究其对Pb(Ⅱ)的吸附性能与机制.结果表明,改性后Si-OH和-NH2官能团成功引入,使材料最大吸附容量从50.51mg/g跃升至102.85mg/g,增幅达103.6%.吸附动力学与等温线研究显示,Fh和KH-Fh对Pb(Ⅱ)的吸附符合伪二级动力学和Langmuir模型,以化学吸附为主;热力学参数ΔH>0,表明升温促进反应.相较于原矿,KH-Fh在pH值3.0~7.0范围吸附效率更高且稳定,受离子强度与常见共存离子影响小.XPS分析证实,Pb(Ⅱ)通过与Si-OH、Fe-OH及-NH2配位实现固定.研究结果为铁氧化物功能化改性及铅污染修复提供了新的理论见解和实践指导.

, authors=蔡琳1, 江承风2, 严心雨1, 熊双莲1, 涂书新1, *, authorsList=蔡琳, 江承风, 严心雨, 熊双莲, 涂书新, authorCompany=null, correspAuthors=涂书新, authorNote=

蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

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蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

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蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

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硅烷偶联剂改性水铁矿对Pb(Ⅱ)的吸附增效机制
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蔡琳 1 , 江承风 2 , 严心雨 1 , 熊双莲 1 , 涂书新 1, *
中国环境科学 | 水污染与控制 2025,45(11): 6101-6111
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中国环境科学 |水污染与控制 2025 , 45 (11) : 6101 -6111
硅烷偶联剂改性水铁矿对Pb(Ⅱ)的吸附增效机制
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蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

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蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

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蔡琳1 , 江承风2, 严心雨1, 熊双莲1, 涂书新1, *
作者信息
  • 1.华中农业大学资源与环境学院,湖北 武汉 430070
  • 2.湖北省地质科学研究院(湖北省富硒产业研究院),湖北 武汉 430034
通讯作者:
* 责任作者,教授,
作者简介:

蔡琳(2001-),女,江苏南通人,华中农业大学硕士研究生,主要从事重金属污染修复研究.发表论文2篇..

Mechanism of enhanced lead(Ⅱ) adsorption by silane coupling agent-modified ferrihydrite
Lin CAI1 , Cheng-feng JIANG2, Xin-yu YAN1, Shuang-lian XIONG1, Shu-xin TU1, *
Affiliations
  • 1.College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
  • 2.Hubei Geoscience Research Institute(Hubei Selenium-rich Industry Research Institute), Wuhan 430034, China
出版时间: 2025-11-20
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以3-氨基丙基三乙氧基硅烷(KH550)改性水铁矿,制备有机硅烷改性水铁矿(KH-Fh),并系统探究其对Pb(Ⅱ)的吸附性能与机制.结果表明,改性后Si-OH和-NH2官能团成功引入,使材料最大吸附容量从50.51mg/g跃升至102.85mg/g,增幅达103.6%.吸附动力学与等温线研究显示,Fh和KH-Fh对Pb(Ⅱ)的吸附符合伪二级动力学和Langmuir模型,以化学吸附为主;热力学参数ΔH>0,表明升温促进反应.相较于原矿,KH-Fh在pH值3.0~7.0范围吸附效率更高且稳定,受离子强度与常见共存离子影响小.XPS分析证实,Pb(Ⅱ)通过与Si-OH、Fe-OH及-NH2配位实现固定.研究结果为铁氧化物功能化改性及铅污染修复提供了新的理论见解和实践指导.

水铁矿  /  硅烷偶联剂  /  Pb(Ⅱ)  /  吸附机制  /  重金属污染修复

3-aminopropyltriethoxysilane (KH550) was used to modify Fh, yielding organosilane-modified ferrihydrite (KH-Fh). The Pb(Ⅱ) adsorption performance and underlying mechanisms of KH-Fh were systematically explored.Results demonstrate that the modification successfully introduced Si-OH and -NH2 functional groups onto the Fh surface, enhancing the maximum adsorption capacity from 50.51mg/g of the unmodified Fh to 102.85mg/g of KH-Fh, representing a 103.6% increase. Adsorption kinetics and isotherm studies indicate that the adsorption processes of both Fh and KH-Fh for Pb(Ⅱ) conform to the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting that chemisorption is the dominant mechanism. The positive value of the thermodynamic parameter ΔH indicates that elevated temperatures promote the adsorption reaction. Compared with unmodified Fh, KH-Fh maintains higher and more stable adsorption efficiency across a wide pH range (3.0~7.0) and is less affected by ionic strength and common coexisting ions (Na+, K+, Ca2+). X-ray photoelectron spectroscopy (XPS) analysis confirms that Pb(Ⅱ) is immobilized through coordination with Si-OH, Fe-OH, and -NH2 functional groups on the surface of KH-Fh, significantly enhancing the adsorption stability. These results offer novel theoretical insights and practical guidance for the functional modification of iron oxides and the remediation of Pb(Ⅱ)-contaminated environments.

ferrihydrite  /  silane coupling agent  /  Pb(Ⅱ)  /  adsorption mechanism  /  heavy metal pollution remediation
蔡琳, 江承风, 严心雨, 熊双莲, 涂书新. 硅烷偶联剂改性水铁矿对Pb(Ⅱ)的吸附增效机制. 中国环境科学, 2025 , 45 (11) : 6101 -6111 .
Lin CAI, Cheng-feng JIANG, Xin-yu YAN, Shuang-lian XIONG, Shu-xin TU. Mechanism of enhanced lead(Ⅱ) adsorption by silane coupling agent-modified ferrihydrite[J]. China Environmental Science, 2025 , 45 (11) : 6101 -6111 .
  • 国家自然科学基金资助项目(42277392)
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  • 接收时间:2025-04-15
  • 首发时间:2026-10-08
  • 出版时间:2025-11-20
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  • 收稿日期:2025-04-15
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国家自然科学基金资助项目(42277392)
作者信息
    1.华中农业大学资源与环境学院,湖北 武汉 430070
    2.湖北省地质科学研究院(湖北省富硒产业研究院),湖北 武汉 430034

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2种不同金属材料的力学参数
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属
Genus
种数
Number of
species
占总种数比例
Percentage of total
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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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