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投稿时间:2021-10-26 修订日期:2021-11-02 录用日期:2021-11-08 网络发布日期:2022-01-18
投稿时间:2021-10-26 修订日期:2021-11-02 录用日期:2021-11-08 网络发布日期:2022-01-18
中文摘要: 采用沉淀煅烧—水热法制备了负载二氧化锰的磁性蔗渣炭(MnO2@Fe3O4@SCBC),并通过XRD、FT-IR等对吸附剂进行表征,证明二氧化锰成功负载在Fe3O4@SCBC上。探究了吸附剂质量、初始溶液pH等对MnO2@Fe3O4@SCBC吸附Pb2+的影响,同时,比较研究了Fe3O4@SCBC和MnO2@Fe3O4@SCBC对Pb2+的吸附动力学和热力学。结果表明,在试验条件下,MnO2@Fe3O4@SCBC对Pb2+的吸附量明显优于Fe3O4@SCBC,吸附过程均符合准二级动力学方程和Langmuir等温吸附模型。在吸附时间为10 h、吸附剂质量20 mg、Pb2+初始质量浓度100 mg/L、pH=5.0时,MnO2@Fe3O4@SCBC饱和吸附量为241.33 mg/g。经过10次吸附、脱附试验后,吸附剂仍具有良好的吸附活性及稳定的吸附容量。
Abstract:MnO2-loaded magnetic bagasse carbon (MnO2@Fe3O4@SCBC) was fabricated via precipitation calcination method and hydrothermal method. The adsorbent was characterized by XRD and FT-IR to confirm that MnO2 is successfully loaded on Fe3O4@SCBC. Effects of adsorbent quality and initial pH value of solution on adsorption of Pb2+ by MnO2@ Fe3O4@SCBC were investigated. Adsorption dynamics and thermodynamic behaviors of Fe3O4@SCBC and MnO2@Fe3O4@SCBC for Pb2+ were compared. The results show that under the experimental conditions, MnO2@Fe3O4@SCBC displays excellent performance in adsorption capacity towards Pb2+, and the adsorption process is described well by the quasi second-order kinetic equation and Langmuir isothermal adsorption model. The maximum adsorption capacity of MnO2@Fe3O4@SCBC towards Pb2+ is 241.33mg/g under the conditions including adsorption time of 10 h,initial pH value of solution of 5, dosage of adsorbent of 20 mg, and initial concentration of Pb2+ of 100 mg/L. After ten consecutive adsorption-desorption experiments, the adsorbent remains high activity and stable adsorption capacity.
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基金项目:广西自然科学基金重点项目(2018GXNSFDA281018);广西科技重大专项(桂科AA19182015)
| 作者 | 单位 | |
| 秦玲 | 广西大学化学化工学院 | ql13376321870@163.com |
| 关宇霆 | 广西大学化学化工学院 | |
| 晋刚 | 广西大学化学化工学院 | |
| 顾珀炜 | 广西大学化学化工学院 | |
| 粟海锋* | 广西大学化学化工学院 | suhfeng@gxu.edu.cn |
引用文本:
秦玲,关宇霆,晋刚,顾珀炜,粟海锋.负载二氧化锰的磁性蔗渣炭对铅离子的吸附[J].有色金属(冶炼部分),2022(2):99-105.
QIN Ling,GUAN Yu-ting,JI Gang,GU Po-wei,SU Hai-feng.Adsorption of Pb2+ by MnO2-loaded Magnetic Bagasse Carbon[J].Nonferrous Metals (Extractive Metallurgy),2022(2):99-105.
秦玲,关宇霆,晋刚,顾珀炜,粟海锋.负载二氧化锰的磁性蔗渣炭对铅离子的吸附[J].有色金属(冶炼部分),2022(2):99-105.
QIN Ling,GUAN Yu-ting,JI Gang,GU Po-wei,SU Hai-feng.Adsorption of Pb2+ by MnO2-loaded Magnetic Bagasse Carbon[J].Nonferrous Metals (Extractive Metallurgy),2022(2):99-105.

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