| 淀粉稳定Fe3O4纳米粒子对水中As(V)的吸附特性研究 |
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| 引用本文： | 李小飞,李一菲,钱天伟.淀粉稳定Fe3O4纳米粒子对水中As(V)的吸附特性研究[J].环境科学学报,2016,36(9):3222-3229. |
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| 作者姓名： | 李小飞 李一菲 钱天伟 |
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| 作者单位： | 太原科技大学环境与安全学院, 太原 030024,太原科技大学环境与安全学院, 太原 030024,太原科技大学环境与安全学院, 太原 030024 |
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| 基金项目： | 山西省科技重大专项计划（No.20131101028）；山西省回国留学人员科研资助项目（No.2013-重点2）；太原科技大学博士启动基金（No.20142042） |
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| 摘 要： | 以可溶性淀粉作为稳定剂制备纳米Fe_3O_4粒子,探讨了反应时间、p H值、初始砷浓度和腐殖酸对Fe_3O_4纳米粒子吸附水体中As(V)的吸附效果影响.实验结果表明,淀粉稳定的Fe_3O_4纳米粒子对水体中As(V)的吸附动力学过程符合准二级动力学,吸附等温线符合Langmuir吸附模型;吸附容量随着溶液p H的增加逐渐降低,在p H为8.0的弱碱性水体中对As(V)的最大吸附容量可达202.56 mg·g~(-1);此外,腐殖酸(HA)能降低纳米粒子对As(V)的吸附能力.
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| 关 键 词： | 可溶性淀粉 纳米四氧化三铁粒子 As(V) 吸附 |
| 收稿时间： | 2015/10/26 0:00:00 |
| 修稿时间： | 2015/11/27 0:00:00 |
Arsenate adsorption by starch-stabilized Fe3O4 nanoparticles in water |
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| LI Xiaofei,LI Yifei and QIAN Tianwei.Arsenate adsorption by starch-stabilized Fe3O4 nanoparticles in water[J].Acta Scientiae Circumstantiae,2016,36(9):3222-3229. |
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| Authors: | LI Xiaofei LI Yifei and QIAN Tianwei |
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| Institution: | Institute of Environment Science, Taiyuan University of Science and Technology, Taiyuan 030024,Institute of Environment Science, Taiyuan University of Science and Technology, Taiyuan 030024 and Institute of Environment Science, Taiyuan University of Science and Technology, Taiyuan 030024 |
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| Abstract: | The Fe3O4 nanoparticles stabilized by starch were synthesized.The effects of reaction time, pH value, initial As(V) concentration and humic acid on the adsorption of As(V) on Fe3O4 nanoparticles were investigated.Results show that the adsorption process of As(V) on starch-stabilized Fe3O4 followed the pseudo-second-order kinetic equation.The equilibrium adsorption data fit to Langmuir adsorption model.Adsorption capacity of the Fe3O4 nanoparticles decreased with the increase of pH value, and the maximum adsorption capacity of 202.56 mg·g-1 was obtained at pH 8.0.Humic acids reduces the adsorption of As(V) on starch-stabilized Fe3O4 nanoparticles. |
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| Keywords: | soluble starch Fe3O4 nanoparticles As(V) adsorption |
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