高锰酸钾改性活性炭对甲醛吸附性能的研究

Study on Formaldehyde Adsorption Performance of Potassium Permanganate Modified Activated Carbon

采用KMnO_4对活性炭进行改性,考察了其对甲醛吸附性能的影响。利用孔结构分析、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)等手段对样品进行了表征。结果表明,改性后活性炭样品的孔结构特征基本不变,C=O及C-OH等亲水基团含量有所增加。KMnO_4改性明显提高了活性炭对甲醛的吸附能力,当KMnO_4浓度为2%时,活性炭对甲醛的吸附性能最佳。

The activated carbon was modified by potassium permanganate, and the formaldehyde adsorption performance of the obtained was investigated. The sample was characterized by pore structure analysis, X-ray diffraction （XRD） , Fourier transform infrared spectroscopy （FTIR） and scanning electron microscope （SEM）. Results showed that the pore structure was almost invariant, and the content of the hydrophilic groups such as C = 0 and C-OH was increased after the modification. KMnO4 modification improved the formaldehyde adsorption of the activated carbon. When the weight percentage of potassium permanganate was 2%, the formaldehyde adsorption performance was the best.