废茶渣对Cr(Ⅵ)的等温吸附模型研究

摘要

The thermal adsorption model of Cr( VI) with waste tea dust in Cr( VI) initial concentration of 24 mg/L,40 mg/L,64 mg/L,96 mg/L,120 mg/L,160 mg/L has been investigated in the condition of waste tea dosage of 1. 5 g, pH value of 5. 5, temperature of 25 ℃. The adsorption behavior of Cr(VI) with waste tea dust could be described with both Langmuir and Freundlich thermal adsorption models, which accorded with Freundlich model better. The maximum saturation adsorption quantity was 4. 27 mg/g. The adsorption was a favorable adsorption process.%在废茶渣量1.5g、pH5.5、温度25℃、吸附时间2h条件下,研究了不同Cr(Ⅵ)初始浓度为24 mg/L、40 mg/L、64mg/L、96 mg/L、120 mg/L、160 mg/L下的废茶渣对Cr(Ⅳ)的等温吸附曲线.Langmuir和Freundlich等温吸附模型都可以描述茶渣对Cr(Ⅵ)的吸附行为.但Freundlich等温吸附模型符合得更好.吸附过程中最大饱和吸附量为4.27 mg/g.吸附是优惠吸附过程.