摘要
稀溶液中的Cr(Ⅵ)依其PH值之高低,或被活性炭还原,或被活性炭吸附。活性炭吸附Cr(Ⅵ)的速度,受Cr(Ⅵ)浓度影响最大,用炭量影响其次,溶液PH影响最小。活性炭孔隙结构中过多的细微孔对脱除Cr(Ⅵ)不见得有好处。表面上存在碱性氧基团,有利于吸附Cr(Ⅵ)。
The reduction of Cr (Ⅵ) species or the adsorption of it is dependent on the PH values of the solution.The adsorption velocity of Cr (Ⅵ) species on activated carbon surface is coitrolled by the concentration ofCr (Ⅵ) as a major factor, the amount of activated carbon used as a secondary one and the PH value of the solution as a minor one.The superfluos ultramicropores is not neccssarilg advantageous to the removal process.The adsorption of Cr (Ⅵ) species is promoted by the presence of basic surface oxide on carbon surface.
出处
《炭素》
1993年第4期1-8,共8页
Carbon
