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羧酸配位前驱体法制备铁镍复合氧化物及其对Cr(Ⅵ)的吸附性能

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Abstract:

采用不同二元羧酸(草酸、丙二酸、丁二酸和酒石酸)为配位沉淀剂,通过羧酸配位前驱体法制备出铁镍复合氧化物,采用场发射扫描电镜、X射线粉末衍射仪、Fourier红外光谱分析仪等对产物的形貌及物相进行了表征,探讨了二元羧酸分子结构对铁镍复合氧化物物相形成的影响,考察了样品用于含Cr(Ⅵ)模拟废水处理时的性能。结果表明以不同二元羧酸沉淀剂制备出的铁镍复合氧化物的物相不同,其对水体中的Cr(Ⅵ)吸附性能也不同,其中以酒石酸配位前驱体获得的铁镍复合氧化物Cr(Ⅵ)去除效果最好。在pH=2.0时,吸附剂的吸附效果最佳。吸附过程符合动力学第二方程。

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