| 改性凹凸棒的制备及对砷离子的吸附研究 |
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| 引用本文： | 李箫宁,李檬.改性凹凸棒的制备及对砷离子的吸附研究[J].影像科学与光化学,2019,37(2):127-135. |
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| 作者姓名： | 李箫宁 李檬 |
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| 作者单位： | 华北电力大学环境科学与工程系,河北保定,071003;华北电力大学环境科学与工程系,河北保定,071003 |
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| 基金项目： | 国家自然科学基金（21607044）、河北省自然科学基金（B2017502069）和中央高校基本科研业务费专项资金项目（2018MS113）资助 |
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| 摘 要： | 针对日益严重的砷离子污染问题,本文采用灵敏简便的原子荧光分析法,探究了凹凸棒石粘土吸附剂对砷离子的吸附性能,测定了pH、吸附时间、砷离子的初始浓度等因素对凹凸棒石粘土负载铁氧化物对砷离子吸附能力的影响,并通过SEM、EDX、FTIR对所制得的吸附剂进行了表征研究,同时进行了吸附动力学和吸附等温模型的分析。研究结果表明,改性后的凹凸棒对砷离子的吸附性能有了显著提升,在较低浓度时吸附效率可达98%,该吸附符合Langmuir等温吸附模型和准二级动力学方程。
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| 关 键 词： | 原子荧光法 凹凸棒 铁氧化物 砷离子 吸附 |
| 收稿时间： | 2018-12-21 |
New Modified Attapulgite for Arsenic Ions Adsorption by Atomic Fluorescence Spectrometry |
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| LI Xiaoning,LI Meng.New Modified Attapulgite for Arsenic Ions Adsorption by Atomic Fluorescence Spectrometry[J].Imaging Science and Photochemistry,2019,37(2):127-135. |
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| Authors: | LI Xiaoning LI Meng |
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| Affiliation: | Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, Hebei, P. R. China |
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| Abstract: | Arsenic ion pollution has drawn great attention due to its severe destruction of water resources. In this work, attapulgite clay materials and its feasibility for the adsorption of arsenic ions have been investigated. The pH, contact time and initial concentration of arsenic ions were investigated by atomic fluorescence spectrometry on the iron oxide loaded attapulgite clay (Fe2O3/ATP). The prepared adsorbent was characterized by SEM, EDX and SEM-EDX mapping. At the same time, the adsorption kinetics and adsorption isotherm model of the prepared adsorbent are analyzed. The results show that the modified attapulgite has a significant increase in the adsorption of arsenic ions, and the adsorption efficiency can reach 98% at a lower concentration. The adsorption conforms to the Langmuir isotherm adsorption model and the pseudo-second-order kinetic equation. |
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| Keywords: | atomic fluorescence spectrometry attapulgite clay iron oxide arsenic ion adsorption |
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