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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Silver-embedded granular activated carbon as an antibacterial medium for water purification
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Silver-embedded granular activated carbon as an antibacterial medium for water purification

机译：嵌入银的颗粒状活性炭作为用于水净化的抗菌介质

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Silver (Ag) particle embedded granular activated carbon (GAC) was made for the first time to assess its ability in inhibiting the growth of Escherichia coli (E. coli), a water-borne bacterial pathogen. Ag-GAC was made by impregnating GAC with AgNO3 and then reducing it to metallic Ag. Plate assay showed slight inhibition of E. coli, even with Ag-GAC prepared from 0.005 mol L-1 AgNO3, but this and shake flask tests showed a conspicuous effect only for higher concentrations of 0.1-1 mol L-1 AgNO3. Flow tests further indicated that Ag-GAC made from 1.0 mol L-1 AgNO3 caused a desirable three orders of reduction in E. coli number concentration in less than 30 s. An optimum of 9-10.5 wt% of embedded Ag in the final Ag-GAC product was necessary for the requisite complete inhibition of E. coli, killing bacteria in the contact-mode for up to 350 L of flowing water. These results prove that Ag-GAC possesses antibacterial properties and can be used for disinfection to produce potable quality water. (C) 2008 Society of Chemical Industry.
机译：首次制备了嵌入银（Ag）颗粒的颗粒状活性炭（GAC），以评估其抑制水性细菌病原体大肠杆菌（E. coli）生长的能力。 Ag-GAC是通过用AgNO3浸渍GAC，然后将其还原为金属Ag制成的。平板分析显示，即使用0.005 mol L-1 AgNO3制备的Ag-GAC对大肠杆菌也有轻微的抑制作用，但这和摇瓶试验表明，仅对于更高浓度的0.1-1 mol L-1 AgNO3才有明显的效果。流量测试进一步表明，由1.0 mol L-1 AgNO3制成的Ag-GAC在不到30 s的时间内即可将大肠杆菌数量浓度降低3个数量级。为了完全抑制大肠杆菌，以接触模式杀死多达350 L的流动水，最终的Ag-GAC产品中嵌入的Ag的最佳9-10.5 wt％是必需的。这些结果证明，Ag-GAC具有抗菌性能，可用于消毒以生产饮用水。 （C）2008年化学工业协会。

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