硫酸改性松树叶对废水中Cr(Ⅵ)的吸附性能研究-《电镀与精饰》

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Title:: Research on Adsorption Performance of Pine Leaves Modified by Sulfuric Acid in Cr( Ⅵ) Adsorption

摘要:: 以松树叶为原料,经硫酸改性制得吸附剂,通过吸附实验考察了pH、吸附时间、初始质量浓度及吸附剂用量对Cr(Ⅵ)的影响。结果表明,在50mL质量浓度为10.0mg/L的Cr(Ⅵ)溶液中,吸附剂用量0.4g,pH=3,吸附t为120min时,效果最佳,Cr(Ⅵ)的吸附量可达1.22mg/g,去除率达到97.6%。对实验数据进行吸附动力学模型进行拟合,结果表明,吸附过程更符合准二级动力学模型,以化学吸附为主。

Abstract:: Pine leaves had been modified by sulfuric acid for Cr( Ⅵ) adsorption. Effects of pH,adsorption time,initial concentration and adsorbent dosage on adsorption efficiency were investigated through experiments. Results showed that when pH = 3. 0,adsorbent dosage was 0. 4 g,and adsorption time was120 min,the adsorption efficiency was the optimum in 50 mL solution of 10. 0 mg /L Cr( Ⅵ) mass concentration; Cr( Ⅵ) adsorption capacity could up to 12. 2 mg /g and removing rate could up to 97. 6%. The experimental data were fitted with adsorption kinetics model and results showed that the adsorption process was more in line with pseudo-second-order reaction model and chemical adsorption hold a dominant position.