栀子花叶对水体中刚果红染料的吸附及其动力学研究

Study on Adsorption and Kinetics of Congo Red Dye Inwater by Gardenia Leaf

以栀子花叶为原料,经甲醛处理后,用于水体中刚果红染料的吸附。结果表明:处理初始浓度为50 mg/L的刚果红染料溶液时,栀子花叶投加量为3.2 g/L,吸附时间为80 min,pH为7~9是最佳吸附条件,最大吸附率为85.93%;栀子花叶对刚果红染料的吸附过程符合Freundlich等温吸附模型和准二级动力学模型。

The gardenia leafwas used as the raw material for the adsorption of Congo red dyein the water after pretreatment with formaldehyde.When treating the Congo red dye solution with an initial concentration of 50 mg/L,the dosage of Gardenia jasminoides was 3.2 g/L,the adsorption time was 80 min,pH 7-9 was the best adsorption condition,and the maximum adsorption rate was 85.93%.The adsorption process of Congo red dye by gardenia leaf adsorbentaccorded with Freundlich isothermal adsorption model,and the adsorption kinetics follows the quasi-secondorder kinetic model.