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改性活性氧化铝吸附去除水中痕量磷的性能

Keywords: γ-Al_2O_3,改性,痕量磷,吸附除磷,Al_2(SO_4)_3,Na_2SO_4

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Abstract:

为了获得更为高效的去除水中痕量磷的方法,通过静态吸附试验考察了经Al_2(SO_4)_3或Na_2SO_4改性的活性氧化铝(γ-Al_2O_3)吸附除磷性能,观察了吸附剂投量、pH值及水温变化对PO_4~3-P去除效果的影响及改性前后的γ-Al_2O_3对模拟水样中不同形态磷的去除效果.结果表明:γ-Al_2O_3经Al_2(SO_4)_3或Na_2SO_4改性后对PO_4~3-P的去除效果比改性前有显著提高,对PO_4~(3-)-P的去除率分别提高了18.53%和14.34%;改性γ-Al_2O_3对PO_4~(3-)-P的去除率在-定的投量范围内随投量的增加明显提高;改性γ-Al_2O_3对PO_4~(3-)-P的吸附作用以物理吸附为主,随着温度和pH值的升高,除磷效果均呈下降趋势;经Al_2(SO_4)_3改性的γ-Al_2O_3表现出更好的除磷效果和较强的水质适应性;水中浊质对吸附除磷效果影响较大,因此γ-Al_2O_3更适合滤后水的深度除磷.

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