| 一步热解法制备Cu/Fe双金属生物炭复合材料及其高效吸附Pb2+性能 |
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| 引用本文： | 石云龙,贾振亚,林强,宋小毛,于长江,王向辉,解建丽,梁小洁,商安琪,费雨箫.一步热解法制备Cu/Fe双金属生物炭复合材料及其高效吸附Pb2+性能[J].无机化学学报,2023,39(5):841-852. |
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| 作者姓名： | 石云龙 贾振亚 林强 宋小毛 于长江 王向辉 解建丽 梁小洁 商安琪 费雨箫 |
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| 作者单位： | 海南师范大学化学与化工学院, 水环境污染治理与资源化重点实验室, 热带药用资源化学教育部重点实验室, 天然高分子功能材料重点实验室, 海口 571158;海南环泰检测技术有限公司, 海口 571158;墣锦环境工程(海南)有限公司, 海口 570100 |
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| 基金项目： | 海南省科技专项(No.ZDYF2020079,ZDYF2022SHFZ279,ZDYF2022XDNY158)和海口市科技计划(No.2021041)资助。 |
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| 摘 要： | 使用一步热解法制备了Cu/Fe双金属生物炭复合材料(BC@Cu/Fe-X,X=3、5、10)和Fe生物炭复合材料(BC@Fe)。考察了Cu掺杂量对BC@Cu/Fe-X吸附Pb2+的影响，确定最佳掺杂比例。结果显示BC@Cu/Fe-5吸附Pb2+性能最好。考察了吸附时间、Pb2+浓度、p H、背景离子、空气中老化等实验条件对BC@Cu/Fe-5吸附Pb2+的影响。通过动力学、热力学数据拟合分析了BC@Cu/Fe-5吸附Pb2+的行为，利用X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、傅里叶变换红外光谱(FTIR)等表征手段解析了BC@Cu/Fe-5吸附Pb2+前后特征峰变化。BC@Cu/Fe-5吸附Pb2+的机理如下：大约42%的Pb2+被还原为Pb0,33%的Pb2+形成Pb O/Pb(OH)2,25%的Pb2+与O—...
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| 关 键 词： | 双金属 生物炭 Pb2+ 吸附机理 |
| 收稿时间： | 2022/11/8 0:00:00 |
| 修稿时间： | 2023/3/1 0:00:00 |
One-pot pyrolysis synthesis of Cu/Fe bimetallic biochar composites for high efficient adsorption of Pb2+ |
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| SHI Yun-Long,JIA Zhen-Y,LIN Qiang,SONG Xiao-Mao,YU Chang-Jiang,WANG Xiang-Hui,XIE Jian-Li,LIANG Xiao-Jie,SHANG An-Qi,FEI Yu-Xiao.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. |
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| Authors: | SHI Yun-Long JIA Zhen-Y LIN Qiang SONG Xiao-Mao YU Chang-Jiang WANG Xiang-Hui XIE Jian-Li LIANG Xiao-Jie SHANG An-Qi FEI Yu-Xiao |
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| Institution: | 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;Hainan Huantai Inspection Technology Co., Ltd., Haikou 571158, China;Pujin Environmental Engineering(Hainan) Co., Ltd., Haikou 570100, China |
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| Abstract: | 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+. |
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| Keywords: | bimetallic biochar Pb2+ adsorption mechanism |
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