Citation: Yun-Long SHI, Zhen-Ya JIA, Qiang LIN, Xiao-Mao SONG, Chang-Jiang YU, Xiang-Hui WANG, Jian-Li XIE, Xiao-Jie LIANG, An-Qi SHANG, Yu-Xiao FEI. One-pot pyrolysis synthesis of Cu/Fe bimetallic biochar composites for high efficient adsorption of Pb²⁺[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(5): 841-852. doi: 10.11862/CJIC.2023.052 shu

One-pot pyrolysis synthesis of Cu/Fe bimetallic biochar composites for high efficient adsorption of Pb²⁺

1.
Key Laboratory of Natural Polymer Function Material of Haikou City, Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
2.
Hainan Huantai Inspection Technology Co., Ltd., Haikou 571158, China
3.
Pujin Environmental Engineering (Hainan) Co., Ltd., Haikou 570100, China

Corresponding author: Chang-Jiang YU, ycjhnsfdx@163.com
Received Date: 8 November 2022
Revised Date: 1 March 2023

Figures(10)

In this study, Cu/Fe bimetallic biochar composites (BC@Cu/Fe-X, X=3, 5, 10) and Fe biochar composites (BC@Fe) were prepared by one-step pyrolysis. The effect of Cu doping amount on the BC@Cu/Fe-X adsorption of Pb²⁺ was investigated and the optimum doping ratio was determined. The results showed that BC@Cu/Fe-5 had the best adsorption performance for Pb²⁺. The effects of adsorption time, Pb²⁺ concentration, pH, coexisting ions, aging in air, and other experimental conditions on the adsorption of Pb²⁺ by BC@Cu/Fe-5 were studied. The adsorption behavior of BC@Cu/Fe-5 on Pb²⁺ was analyzed by fitting the kinetic and thermodynamic data. X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and other characterization techniques were used to analyze the changes of the characteristic peaks before and after the BC@Cu/Fe-5 adsorption of Pb²⁺. The adsorption mechanism of BC@Cu/Fe-5 on Pb²⁺ is that about 42% of Pb²⁺ is reduced to Pb⁰, 33% of Pb²⁺ forms PbO/Pb(OH)₂, and 25% of Pb²⁺ forms complexes with functional groups such as O—H, C—O, C=O, COO, and Fe—O. Cu doping can improve the ability of Fe to reduce Pb²⁺.
- bimetallic,
- biochar,
- Pb²⁺,
- adsorption mechanism
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

One-pot pyrolysis synthesis of Cu/Fe bimetallic biochar composites for high efficient adsorption of Pb2+

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通讯作者: 陈斌, bchen63@163.com

One-pot pyrolysis synthesis of Cu/Fe bimetallic biochar composites for high efficient adsorption of Pb²⁺