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<p>Open-cell foam concrete can be prepared by using ordinary Portland cement, fly ash and vegetable protein foaming agents as raw materials, adding adsorbents, adjusting the water‒binder ratio and the dilution ratio of the foaming agent, and adopting a physical foaming method. When water-binder ratio is 0.50 and the dilution ratio of the foaming agent is 1:45, open-cell foam concrete with an opening porosity of 53.36% and a dry density of 309 kg/m<sup>3</sup> can be prepared. Graphene oxide (GO) and the foam concrete matrix were modified with NaOH; this increased the number of surface functional groups and adsorption sites on the composite material and improved its adsorption performance. The removal rate of Ni(II) by the composite material reached 96.03%.</p>

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Preparation of a Porous Composite for Removal of Heavy Metal ions from Wastewater

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Zhongwei Liu,
  • Ning An,
  • Xingwu Qiu,
  • Chi Hu

摘要

Open-cell foam concrete can be prepared by using ordinary Portland cement, fly ash and vegetable protein foaming agents as raw materials, adding adsorbents, adjusting the water‒binder ratio and the dilution ratio of the foaming agent, and adopting a physical foaming method. When water-binder ratio is 0.50 and the dilution ratio of the foaming agent is 1:45, open-cell foam concrete with an opening porosity of 53.36% and a dry density of 309 kg/m3 can be prepared. Graphene oxide (GO) and the foam concrete matrix were modified with NaOH; this increased the number of surface functional groups and adsorption sites on the composite material and improved its adsorption performance. The removal rate of Ni(II) by the composite material reached 96.03%.