Twice-milled magnetic biochar: A recyclable material for efficient removal of methylene blue from wastewater

Nina Yan; Biao Hu; Zhiyu Zheng; Haiying Lu; Jingwen Chen; Xiaomei Zhang; Xizhi Jiang; Yonghong Wu; Jan Dolfing; Lei Xu

doi:10.1016/j.biortech.2023.128663

Twice-milled magnetic biochar: A recyclable material for efficient removal of methylene blue from wastewater

Nina Yan, Biao Hu, Zhiyu Zheng, Haiying Lu, Jingwen Chen, Xiaomei Zhang, Xizhi Jiang, Yonghong Wu, Jan Dolfing, Lei Xu

Mechanical and Construction Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Although magnetic modification has potential for preparing recyclable biochar, the traditional preparation methods of loading magnetic materials on biochar will probably lead to pore blockage and consequently remarkable adsorption recession. Herein, a preparation method was developed in which ball milled biochar was loaded with ultrafine magnetite and then milled for a second time, thus generating a magnetic, recyclable biochar with minimal pore blockage. The deposits of magnetite did not significantly wrap the biochar, although a decreased sorption performance was still detectable. Benefitting from the extra milling step, surface functional groups and specific surface areas of the adsorbents were largely restored, thus leading to a 93.8 % recovery adsorption of 84.6 ± 2.5 mg/L on methylene blue. Meanwhile, the recyclability of the material was not affected. The adsorption was driven by multiple interactions. These twice-milled magnetic biochar is quite outstanding for sustainable removal of aqueous contaminants with its recyclability and high sorption efficiency. [Abstract copyright: Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.]

Original language	English
Article number	128663
Pages (from-to)	1-8
Number of pages	8
Journal	Bioresource Technology
Volume	372
Early online date	21 Jan 2023
DOIs	https://doi.org/10.1016/j.biortech.2023.128663
Publication status	Published - 1 Mar 2023

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@article{82e7c9837db7411fb200fd51c533293a,

title = "Twice-milled magnetic biochar: A recyclable material for efficient removal of methylene blue from wastewater",

abstract = "Although magnetic modification has potential for preparing recyclable biochar, the traditional preparation methods of loading magnetic materials on biochar will probably lead to pore blockage and consequently remarkable adsorption recession. Herein, a preparation method was developed in which ball milled biochar was loaded with ultrafine magnetite and then milled for a second time, thus generating a magnetic, recyclable biochar with minimal pore blockage. The deposits of magnetite did not significantly wrap the biochar, although a decreased sorption performance was still detectable. Benefitting from the extra milling step, surface functional groups and specific surface areas of the adsorbents were largely restored, thus leading to a 93.8 % recovery adsorption of 84.6 ± 2.5 mg/L on methylene blue. Meanwhile, the recyclability of the material was not affected. The adsorption was driven by multiple interactions. These twice-milled magnetic biochar is quite outstanding for sustainable removal of aqueous contaminants with its recyclability and high sorption efficiency. [Abstract copyright: Crown Copyright {\textcopyright} 2023. Published by Elsevier Ltd. All rights reserved.]",

keywords = "Ball milling, Magnetic, Biochar, Methylene blue, Adsorption",

author = "Nina Yan and Biao Hu and Zhiyu Zheng and Haiying Lu and Jingwen Chen and Xiaomei Zhang and Xizhi Jiang and Yonghong Wu and Jan Dolfing and Lei Xu",

note = "Funding information: Financial support from the National Natural Science Foundation of China (22208134, 42277408), Jiangsu Provincial Key Research and Development Project [BE2020307], the Nature Science Foundation for Excellent Young Scholars of Jiangsu Province (BK20200057), and Jiangsu Agricultural Science and Technology Innovation Fund [CX(21)1010] are gratefully acknowledged.",

year = "2023",

month = mar,

day = "1",

doi = "10.1016/j.biortech.2023.128663",

language = "English",

volume = "372",

pages = "1--8",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier",

}

TY - JOUR

T1 - Twice-milled magnetic biochar

T2 - A recyclable material for efficient removal of methylene blue from wastewater

AU - Yan, Nina

AU - Hu, Biao

AU - Zheng, Zhiyu

AU - Lu, Haiying

AU - Chen, Jingwen

AU - Zhang, Xiaomei

AU - Jiang, Xizhi

AU - Wu, Yonghong

AU - Dolfing, Jan

AU - Xu, Lei

N1 - Funding information: Financial support from the National Natural Science Foundation of China (22208134, 42277408), Jiangsu Provincial Key Research and Development Project [BE2020307], the Nature Science Foundation for Excellent Young Scholars of Jiangsu Province (BK20200057), and Jiangsu Agricultural Science and Technology Innovation Fund [CX(21)1010] are gratefully acknowledged.

PY - 2023/3/1

Y1 - 2023/3/1

N2 - Although magnetic modification has potential for preparing recyclable biochar, the traditional preparation methods of loading magnetic materials on biochar will probably lead to pore blockage and consequently remarkable adsorption recession. Herein, a preparation method was developed in which ball milled biochar was loaded with ultrafine magnetite and then milled for a second time, thus generating a magnetic, recyclable biochar with minimal pore blockage. The deposits of magnetite did not significantly wrap the biochar, although a decreased sorption performance was still detectable. Benefitting from the extra milling step, surface functional groups and specific surface areas of the adsorbents were largely restored, thus leading to a 93.8 % recovery adsorption of 84.6 ± 2.5 mg/L on methylene blue. Meanwhile, the recyclability of the material was not affected. The adsorption was driven by multiple interactions. These twice-milled magnetic biochar is quite outstanding for sustainable removal of aqueous contaminants with its recyclability and high sorption efficiency. [Abstract copyright: Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.]

AB - Although magnetic modification has potential for preparing recyclable biochar, the traditional preparation methods of loading magnetic materials on biochar will probably lead to pore blockage and consequently remarkable adsorption recession. Herein, a preparation method was developed in which ball milled biochar was loaded with ultrafine magnetite and then milled for a second time, thus generating a magnetic, recyclable biochar with minimal pore blockage. The deposits of magnetite did not significantly wrap the biochar, although a decreased sorption performance was still detectable. Benefitting from the extra milling step, surface functional groups and specific surface areas of the adsorbents were largely restored, thus leading to a 93.8 % recovery adsorption of 84.6 ± 2.5 mg/L on methylene blue. Meanwhile, the recyclability of the material was not affected. The adsorption was driven by multiple interactions. These twice-milled magnetic biochar is quite outstanding for sustainable removal of aqueous contaminants with its recyclability and high sorption efficiency. [Abstract copyright: Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.]

KW - Ball milling

KW - Magnetic

KW - Biochar

KW - Methylene blue

KW - Adsorption

U2 - 10.1016/j.biortech.2023.128663

DO - 10.1016/j.biortech.2023.128663

M3 - Article

C2 - 36693504

VL - 372

SP - 1

EP - 8

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

M1 - 128663

ER -

Twice-milled magnetic biochar: A recyclable material for efficient removal of methylene blue from wastewater

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