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铁基膨润土对水中磷酸根的吸附热力学及动力学研究

Keywords: 铁基膨润土,磷酸根,吸附,热力学,动力学

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Abstract:

采用铁盐改性制得铁基膨润土,研究了其对水中磷酸根的吸附性能及影响因素,结果表明,通过对膨润土的改性提高了磷的去除率,含磷废水初始pH值的大小对磷的去除率影响不大,初始浓度越低越有利于磷的去除。磷的去除率随改性膨润土的投加量增大而提高,随温度升高而增大。进一步研究表明,改性膨润土对磷的吸附是吸热反应,其吸附等温线可采用Langmuir等温吸附方程拟合;改性膨润土对磷的吸附是快速吸附,在20min内,磷去除率达70%以上,符合准二级吸附动力学模型。

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