Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Hanbo Chen; Yurong Gao; Jianhong Li; Chenghua Sun; Binoy Sarkar; Amit Bhatnagar; Nanthi Bolan; Xing Yang; Jun Meng; Zhongzhen Liu; Hong Hou; Jonathan W.C. Wong; Deyi Hou; Wenfu Chen; Hailong Wang

doi:10.1007/s42773-022-00161-2

Biochar ›› 2022, Vol. 4 ›› Issue (1) DOI: 10.1007/s42773-022-00161-2

Original Research

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

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¹School of Environmental and Chemical Engineering, Foshan University, 528000, Foshan, Guangdong, China

²Agronomy College, Shenyang Agricultural University, 110866, Shenyang, China

³Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, 110866, Shenyang, China

⁴Department of Chemistry and Biotechnology, Center for Translational Atomaterials, Swinburne University of Technology, 3122, Hawthorn, VIC, Australia

⁵Future Industries Institute, University of South Australia, 5095, Mawson Lakes, SA, Australia

⁶Department of Separation Science, LUT School of Engineering Science, LUT University, Sammonkatu 12, FI-50130, Mikkeli, Finland

⁷School of Agriculture and Environment, The University of Western Australia, 6001, Perth, WA, Australia

⁸The UWA Institute of Agriculture, The University of Western Australia, 6001, Perth, WA, Australia

⁹Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, 510640, Guangzhou, China

¹⁰State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 100012, Beijing, China

¹¹Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China

¹²School of Environment, Tsinghua University, 100084, Beijing, China

¹³Guangdong Green Technologies Co., Ltd, 528100, Foshan, China

^r hailong.wang@fosu.edu.cn

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Abstract

Crawfish-shell biochar (CSB) pyrolyzed at 350^°C showed the highest Sb(III) adsorption and oxidation.

DFT calculations highlighted complexation, H-bonding and π–π interactions as key removal mechanisms.

Sb(III) oxidation was mainly governed by persistent free radicals and electron transfer capacity of biochar.

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Hanbo Chen, Yurong Gao, Jianhong Li, Chenghua Sun, Binoy Sarkar, Amit Bhatnagar, Nanthi Bolan, Xing Yang, Jun Meng, Zhongzhen Liu, Hong Hou, Jonathan W.C. Wong, Deyi Hou, Wenfu Chen, Hailong Wang. Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations. Biochar, 2022, 4(1): DOI:10.1007/s42773-022-00161-2