| 几种铁氧化物吸附氟的能力及影响因素的研究 |
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| 引用本文： | 杨小洪,魏世勇,李永峰. 几种铁氧化物吸附氟的能力及影响因素的研究[J]. 湖北民族学院学报(自然科学版), 2009, 27(3) |
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| 作者姓名： | 杨小洪 魏世勇 李永峰 |
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| 作者单位： | 湖北民族学院化学与环境工程学院,湖北恩施,445000 |
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| 基金项目： | 湖北省教育厅科研项目，湖北民族学院2007年度青年项目 |
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| 摘 要： | 合成了水铁矿、磁铁矿、针铁矿、赤铁矿四种铁氧化物,研究了它们对氟的吸附量及其影响因素.结果表明,四种铁氧化物对F-的吸附量差异较大,由大到小的顺序为:水铁矿、磁铁矿、针铁矿、赤铁矿.Henry吸附等温式仅能描述针铁矿对氟的吸附;Freundlich吸附等温式能较好的描述四种铁氧化物对氟的吸附,其相关系数达极显著水平或显著水平;Langmuir吸附等温式能够很好的描述四种铁氧化物对氟的吸附,其相关系数均达极显著水平.pH值和温度可明显影响铁氧化物对氟吸附,在酸性条件下,随着pH升高吸附量下降;而在碱性条件下,随着pH升高吸附量缓慢上升;在中性附近时吸附能力最差.随着温度升高(25～45℃),吸附量呈增加趋势.
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| 关 键 词： | 铁氧化物 氟 吸附 吸附等温式 影响因素 |
Fluoride Adsorption Capacity and Influence Factors of Several Iron Oxides |
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| YANG Xiao-hong,WEI Shi-yong,Li Yong-feng. Fluoride Adsorption Capacity and Influence Factors of Several Iron Oxides[J]. Journal of Hubei Institute for Nationalities(Natural Sciences), 2009, 27(3) |
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| Authors: | YANG Xiao-hong WEI Shi-yong Li Yong-feng |
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| Affiliation: | School of Chemical and Environmental Engineering;Hubei University for Nationalities;Enshi 445000;China |
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| Abstract: | The ferrihydrite,magnetite,goethite and hematite were synthesized and characterized using XRD,SEM,FT-IR,BET and PZC.Their fluoride adsorptive capacity and influencing factors were studied.The results indicated that the adsorption capacity of the four iron oxides varies greatly(ferrihydrite>magnetite,goethite>hematite).The surface hydroxyl quantity,the superficial positive charge quantity and specific surface area of iron oxides are the key influence factors adsorbing F-.The H-type adsorption isotherms only ... |
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| Keywords: | iron-oxides fluorine adsorption adsorption isotherm influence factors |
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