运用原位衰减全反射红外光谱法研究铬磁铁矿对磷酸根的吸附作用
An in Situ ATR-FTIR Study on Adsorption of Phosphate by Chromate Doped Magnetite
查看参考文献25篇
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文摘
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采用原位衰减全反射红外光谱技术(ATR-FTIR)探讨pH值和磷酸根浓度对磷酸根在磁铁矿表面吸附形态的影响。结果表明:随着pH值降低,磷酸根浓度增大,磷酸根在磁铁矿表面的吸附量随之增加,形成内层吸附。发现有3种吸附模型:①在低pH值时,主要形成对称性为C_1的吸附形态,可能主要是单质子化双齿双核络合形态;②在高pH值条件下发现有2种形态,高磷酸根浓度条件下,形成1种对称性为C_(3v)吸附形态,主要是单齿单核络合形态,在低浓度条件下,发现1种C_(2v)对称性吸附形态,可能是去质子化双齿双核络合形态,与单齿单核络合形态的物种在低浓度条件下共同存在。 |
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其他语种文摘
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Phosphate adsorption on Cr-doped magnetite was characterized as the function of pH and phosphate concentration by in situ ATR-FTIR spectroscopy. The aim of this study is to investigate adsorption morphology of phosphate the variation medium condition. Results indicate that three inner-sphere complexes formed. At lower pH,monoprotonated bidentate-binuclear complex is dominated, while the monodentate mononuclear species are predomionated at higher pH and the nonprotonated and bidentate binonuclear species are also existing at higher and lower loadings. |
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来源
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矿物学报
,2017,37(1/2):188-195 【核心库】
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DOI
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10.16461/j.cnki.1000-4734.2017.01.023
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关键词
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磁铁矿
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吸附
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磷酸根
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衰减全反射红外光谱
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地址
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1.
华南师范大学物理与电信工程学院, 中国科学院矿物学与成矿学重点实验室;;广东省矿物物理与材料开发研究重点实验室, 广东, 广州, 510006
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中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室;;广东省矿物物理与材料开发研究重点实验室, 广东, 广州, 510640
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华南师范大学物理与电信工程学院, 广东, 广州, 510006
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4734 |
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学科
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地质学;环境污染及其防治 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:5986921
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