| 粉煤灰/二氧化锰复合材料对Pb(Ⅱ)的吸附性能 |
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| 引用本文： | 易龙生,李晓慢,刘苗,刘涛,吴倩.粉煤灰/二氧化锰复合材料对Pb(Ⅱ)的吸附性能[J].矿冶工程,2019,39(5):133-136. |
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| 作者姓名： | 易龙生 李晓慢 刘苗 刘涛 吴倩 |
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| 作者单位： | 中南大学 资源加工与生物工程学院,湖南 长沙 410083 |
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| 摘 要： | 利用多孔粉煤灰(CFA)为载体制备粉煤灰/二氧化锰(CFA@MnO2)复合材料,用以吸附废水中Pb(Ⅱ)。静态吸附试验结果表明:负载MnO2后,粉煤灰对Pb(Ⅱ)吸附效果显著提高。CFA@MnO2对Pb(Ⅱ)吸附动力学符合准二级动力学模型,等温吸附过程符合Langmuir单层吸附模型,最大吸附量为89.28 mg/g。热力学参数ΔH0为18.916 kJ/mol,且ΔG0<0,表明吸附过程是吸热的且自发进行。
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| 关 键 词： | 废水处理 重金属废水 粉煤灰 二氧化锰 Pb(Ⅱ) 吸附 动力学 热力学 |
| 收稿时间： | 2019-03-30 |
Adsorption Property of the Composite of Coal Fly Ash/MnO2 for Pb(Ⅱ) |
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| YI Long-sheng,LI Xiao-man,LIU Miao,LIU Tao,WU Qian.Adsorption Property of the Composite of Coal Fly Ash/MnO2 for Pb(Ⅱ)[J].Mining and Metallurgical Engineering,2019,39(5):133-136. |
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| Authors: | YI Long-sheng LI Xiao-man LIU Miao LIU Tao WU Qian |
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| Affiliation: | School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China |
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| Abstract: | The composite of coal fly ash/manganese dioxide (CFA@MnO2) was prepared by loading MnO2 on porous coal fly ash (CFA), which can be used to adsorb the Pb(Ⅱ) in waste water. Static adsorption experiments show that CFA@MnO2 exhibits better adsorption performance towards Pb(Ⅱ) than CFA. The adsorption of Pb(Ⅱ) by CFA@MnO2 follows a pseudo-second-order kinetics model and its adsorption isotherm fits well to Langmuir model (monolayer adsorption). The maximum adsorption capacity is found to be 89.28 mg/g. The thermodynamic parameter of ΔH0 is calculated to be 18.916 kJ/mol while ΔG0<0, indicating that the adsorption process is endothermic and spontaneous in nature. |
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| Keywords: | waste water treatment heavy metal waste water coal fly ash MnO2 Pb(Ⅱ) adsorption kinetics thermodynamics |
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