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

Yan, Nina, Hu, Biao, Zheng, Zhiyu, Lu, Haiying, Chen, Jingwen, Zhang, Xiaomei, Jiang, Xizhi, Wu, Yonghong, Dolfing, Jan and Xu, Lei (2023) Twice-milled magnetic biochar: A recyclable material for efficient removal of methylene blue from wastewater. Bioresource Technology, 372. p. 128663. ISSN 0960-8524

BITE-D-22-08628 as accepted_.pdf - Accepted Version
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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.

Item Type: Article
Additional Information: 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.
Uncontrolled Keywords: Biochar, Magnetic, Adsorption, Methylene blue, Ball milling
Subjects: H300 Mechanical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Elena Carlaw
Date Deposited: 08 Feb 2023 14:05
Last Modified: 21 Jan 2024 03:30

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