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

文献类型： 外文期刊

作者： Yan, Nina 1 ; Hu, Biao 1 ; Zheng, Zhiyu 1 ; Lu, Haiying 2 ; Chen, Jingwen 1 ; Zhang, Xiaomei 1 ; Jiang, Xizhi 1 ; Wu, Yonghong 4 ; Dolfing, Jan 5 ; Xu, Lei 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Engn Technol Res Ctr Biomass Composites & Addict, Nanjing 210014, Jiangsu, Peoples R China

2.Nanjing Forestry Univ, Coll Biol & Environm, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China

3.Natl Positioning Observat Stn Hung tse Lake Wetla, Hongze 223100, Jiangsu, Peoples R China

4.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China

5.Northumbria Univ, Fac Energy & Environm, Newcastle Upon Tyne NE1 8QH, Northumberland, England

关键词： Biochar; Magnetic; Adsorption; Methylene blue; Ball milling

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2023 年 372 卷

页码：

收录情况： SCI

摘要： 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.

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