热活化褐铁矿吸附除磷性能
发布时间：2018-11-03 17:56
【摘要】：利用X射线荧光光谱、X射线衍射、比表面积分析、场发射扫描和透射电子显微镜、热分析等表征手段研究热活化褐铁矿物相组成和形貌特征,通过静态实验研究热活化褐铁矿除磷效果的影响因素、动力学、热力学及除磷机理。结果表明:褐铁矿中的纳米 亚微米针铁矿晶体在350℃空气中热活化转化成为具有多孔结构的赤铁矿,在该温度下活化处理产物具有更高的比表面积和吸附除磷性能。热活化褐铁矿吸附除磷是自发的吸热过程,在一定pH范围内(3~9),pH值越低越有利于对磷的吸附,低浓度(1~100 mmol/L)Cl~ 、NO_3~ 、SO_4~(2 )对热活化褐铁矿吸附除磷基本没有影响。
[Abstract]:The phase composition and morphology of thermally activated limonite were studied by means of X-ray fluorescence spectroscopy, X-ray diffraction, specific surface area analysis, field emission scanning and transmission electron microscopy and thermal analysis. The influence factors, kinetics, thermodynamics and mechanism of phosphorus removal from thermally activated limonite were studied by static experiments. The results show that the nanometer-micron goethite crystals in limonite are thermally activated at 350 鈩，
本文编号：2308525
[Abstract]:The phase composition and morphology of thermally activated limonite were studied by means of X-ray fluorescence spectroscopy, X-ray diffraction, specific surface area analysis, field emission scanning and transmission electron microscopy and thermal analysis. The influence factors, kinetics, thermodynamics and mechanism of phosphorus removal from thermally activated limonite were studied by static experiments. The results show that the nanometer-micron goethite crystals in limonite are thermally activated at 350 鈩，
本文编号：2308525
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