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
UR - http://www.scopus.com/inward/record.url?scp=85148113312&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2023.128663
DO - 10.1016/j.biortech.2023.128663
M3 - Article
C2 - 36693504
SN - 0960-8524
VL - 372
SP - 1
EP - 8
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 128663
ER -
