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对泥煤吸附Cr(Ⅵ)的动力学过程进行了研究。结果表明,pH值和初始Cr(Ⅵ)质量浓度对Cr(Ⅵ)的吸附率有明显的影响,pH值越小,泥煤表面正电性越高,Cr(Ⅵ)吸附率越高;初始Cr(Ⅵ)质量浓度越小,Cr(Ⅵ)吸附率越高;初始Cr(Ⅵ)质量浓度位于10~20 mg/L,新型L-F动力学模型能很好地描述泥煤吸附过程;新型L-F动力学方程直线化截距导出的参数Co/(Co-Ce)可以反映吸附剂的吸附强弱,“多化一”法推出了Cr(Ⅵ)初始浓度与吸附常数k拟合函数关系。
The kinetics of adsorption of Cr (Ⅵ) on peat was studied. The results showed that the pH value and initial Cr (Ⅵ) concentration had a significant effect on the adsorption rate of Cr (Ⅵ). The smaller the pH value was, the higher the positive charge of peat was and the higher the Cr (Ⅵ) adsorption rate was. The adsorption capacity of Cr (¢ ö) was higher and the concentration of Cr (VI) was in the range of 10 ~ 20 mg / L. The new LF kinetic model can well describe the adsorption process of peat. The new LF The parameter Co / (Co-Ce) derived from the linear intercept of the kinetic equation can reflect the adsorption strength of the adsorbent. The “multiplication” method introduced the relationship between the initial concentration of Cr (Ⅵ) and the fitting function of adsorption constant k .