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Fe-modified/unmodified Carex meyeriana Kunth biochars were prepared at 300, 500, and 700℃. The degradation efficiencies of rhodamine B (RhB) in water by peracetic acid (PAA) were compared. The effects of reaction conditions (PAA concentration, Fe-KBC700 dosage, RhB concentration, pH, H2O2 concentration, co-existing anion and fulvic acid) on 700℃ iron-modified biochar (Fe-KBC700) were studied. The dominant active species, activation mechanism and degradation pathways of RhB were analyzed. High pyrolysis temperature and the introduction of Fe were beneficial to the improvement of biochars activation properties. Fe-KBC700/PAA system degraded 99.8% of RhB within 30min. Higher PAA concentration, Fe-KBC700dosage and lower RhB concentration were conducive to RhB degradation, while alkaline conditions and higher co-existing H2O2 concentration inhibit the reaction. Cl-, SO42-, and NO3- hardly affect the degradation of RhB, while HCO3- and fulvic acid could inhibit the reaction. The degradation of RhB was mainly due to the non-radical pathway. Singlet oxygen, electron transfer process and high-valent iron were detected in the reaction. The oxygen-containing functional groups and defects of Fe-KBC700 were the key reaction sites, and two degradation pathways of RhB were inferred. In addition, Fe-KBC700 could degrade 75.4% of RhB after 5 cycles. This study could provide a reference for the optimization of catalytic performance of biochars and the mechanism of activation of PAA by iron-modified biochar.

, authors=Qi GUO, Bao-wei ZHAO*, Ke YANG, Jiang-long PAN, authorsList=Qi GUO, Bao-wei ZHAO, Ke YANG, Jiang-long PAN, authorCompany=null, correspAuthors=Bao-wei ZHAO, 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=1314917752230478464, articleId=1314917750082994814, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=铁改性乌拉草生物炭活化过氧乙酸降解水中的罗丹明B, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

本研究在300,500和700℃下制备了铁改性/未改性乌拉草生物炭,比较考察了其活化过氧乙酸(PAA)降解水中罗丹明B(RhB)的效能.以700℃铁改性生物炭(Fe-KBC700)为代表材料,研究了反应条件(PAA浓度、Fe-KBC700投加量、RhB浓度、pH值、H2O2浓度以及水中常见阴离子和富里酸)的影响,分析了反应过程中的优势活性物种、活化机理和RhB的降解路径.高热解温度和Fe的引入有利于生物炭活化性能的提高,Fe-KBC700/PAA体系可在30min内降解99.8%的RhB,较高的PAA浓度、Fe-KBC700投加量和较低的RhB浓度有利于RhB的降解,而碱性条件和较高的共存H2O2浓度会抑制降解,Cl-、SO42-和NO3-几乎不影响RhB的降解,而HCO3-和FA会对反应造成一定的抑制效果.RhB的降解主要历经非自由基途径,单线态氧、电子转移过程和高价铁均在反应中检测到,Fe-KBC700的含氧官能团和缺陷是关键的反应位点,并提出两条RhB的降解路径.此外,Fe-KBC700在循环5次后仍可降解75.4%的RhB.本研究可为生物炭催化性能的优化以及铁改性生物炭活化PAA的机理研究提供参考.

, authors=郭琦, 赵保卫*, 杨珂, 潘江龙, authorsList=郭琦, 赵保卫, 杨珂, 潘江龙, authorCompany=null, correspAuthors=赵保卫, authorNote=

郭琦(1999-),男,甘肃兰州人,硕士研究生,主要研究方向为水污染控制化学.发表论文2篇..

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* 责任作者,教授,
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郭琦(1999-),男,甘肃兰州人,硕士研究生,主要研究方向为水污染控制化学.发表论文2篇..

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郭琦(1999-),男,甘肃兰州人,硕士研究生,主要研究方向为水污染控制化学.发表论文2篇..

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铁改性乌拉草生物炭活化过氧乙酸降解水中的罗丹明B
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郭琦 , 赵保卫 * , 杨珂 , 潘江龙
中国环境科学 | 水污染与控制 2025,45(8): 4354-4364
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中国环境科学 |水污染与控制 2025 , 45 (8) : 4354 -4364
铁改性乌拉草生物炭活化过氧乙酸降解水中的罗丹明B
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郭琦 , 赵保卫* , 杨珂, 潘江龙
作者信息
  • 兰州交通大学环境与市政工程学院,甘肃 兰州 730070
通讯作者:
* 责任作者,教授,
作者简介:

郭琦(1999-),男,甘肃兰州人,硕士研究生,主要研究方向为水污染控制化学.发表论文2篇..

Iron-modified Carex meyeriana Kunth biochar activating peracetic acid to degrade rhodamine B dye in water
Qi GUO , Bao-wei ZHAO* , Ke YANG, Jiang-long PAN
Affiliations
  • School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
出版时间: 2025-08-20
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本研究在300,500和700℃下制备了铁改性/未改性乌拉草生物炭,比较考察了其活化过氧乙酸(PAA)降解水中罗丹明B(RhB)的效能.以700℃铁改性生物炭(Fe-KBC700)为代表材料,研究了反应条件(PAA浓度、Fe-KBC700投加量、RhB浓度、pH值、H2O2浓度以及水中常见阴离子和富里酸)的影响,分析了反应过程中的优势活性物种、活化机理和RhB的降解路径.高热解温度和Fe的引入有利于生物炭活化性能的提高,Fe-KBC700/PAA体系可在30min内降解99.8%的RhB,较高的PAA浓度、Fe-KBC700投加量和较低的RhB浓度有利于RhB的降解,而碱性条件和较高的共存H2O2浓度会抑制降解,Cl-、SO42-和NO3-几乎不影响RhB的降解,而HCO3-和FA会对反应造成一定的抑制效果.RhB的降解主要历经非自由基途径,单线态氧、电子转移过程和高价铁均在反应中检测到,Fe-KBC700的含氧官能团和缺陷是关键的反应位点,并提出两条RhB的降解路径.此外,Fe-KBC700在循环5次后仍可降解75.4%的RhB.本研究可为生物炭催化性能的优化以及铁改性生物炭活化PAA的机理研究提供参考.

铁改性生物炭  /  过氧乙酸  /  罗丹明B  /  高级氧化工艺

Fe-modified/unmodified Carex meyeriana Kunth biochars were prepared at 300, 500, and 700℃. The degradation efficiencies of rhodamine B (RhB) in water by peracetic acid (PAA) were compared. The effects of reaction conditions (PAA concentration, Fe-KBC700 dosage, RhB concentration, pH, H2O2 concentration, co-existing anion and fulvic acid) on 700℃ iron-modified biochar (Fe-KBC700) were studied. The dominant active species, activation mechanism and degradation pathways of RhB were analyzed. High pyrolysis temperature and the introduction of Fe were beneficial to the improvement of biochars activation properties. Fe-KBC700/PAA system degraded 99.8% of RhB within 30min. Higher PAA concentration, Fe-KBC700dosage and lower RhB concentration were conducive to RhB degradation, while alkaline conditions and higher co-existing H2O2 concentration inhibit the reaction. Cl-, SO42-, and NO3- hardly affect the degradation of RhB, while HCO3- and fulvic acid could inhibit the reaction. The degradation of RhB was mainly due to the non-radical pathway. Singlet oxygen, electron transfer process and high-valent iron were detected in the reaction. The oxygen-containing functional groups and defects of Fe-KBC700 were the key reaction sites, and two degradation pathways of RhB were inferred. In addition, Fe-KBC700 could degrade 75.4% of RhB after 5 cycles. This study could provide a reference for the optimization of catalytic performance of biochars and the mechanism of activation of PAA by iron-modified biochar.

iron-modified biochar  /  peracetic acid  /  rhodamine B  /  advanced oxidation process
郭琦, 赵保卫, 杨珂, 潘江龙. 铁改性乌拉草生物炭活化过氧乙酸降解水中的罗丹明B. 中国环境科学, 2025 , 45 (8) : 4354 -4364 .
Qi GUO, Bao-wei ZHAO, Ke YANG, Jiang-long PAN. Iron-modified Carex meyeriana Kunth biochar activating peracetic acid to degrade rhodamine B dye in water[J]. China Environmental Science, 2025 , 45 (8) : 4354 -4364 .
  • 国家自然科学基金资助项目(51766008)
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  • 接收时间:2025-01-06
  • 首发时间:2026-10-08
  • 出版时间:2025-08-20
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  • 收稿日期:2025-01-06
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国家自然科学基金资助项目(51766008)
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    兰州交通大学环境与市政工程学院,甘肃 兰州 730070

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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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