山竹壳活性炭的制备与吸附性能研究

Preparation and Adsorptive Property of Mangosteen Activated Carbon

摘要: 以山竹壳为原料，采用氢氧化钾活化法制备了不同碱炭比的活性炭，通过扫描电子显微镜(SEM)和比表面积(BET)等对活性炭进行了物理性质表征.最优活性炭的比表面积高达2 96153 m2/g.对其进行罗丹明B和铅离子的吸附实验，并进行Langmuir和Freundlich吸附模型拟合,结果表明，山竹壳活性炭对罗丹明B的吸附更符合Langmuir吸附等温模型，而铅离子的吸附符合2种吸附模型.另外，该活性炭对罗丹明B和铅离子的饱和吸附量分别达到1 22218 mg/g和10707 mg/g.

Abstract: Activated carbons with different alkali/carbon ratios were prepared using the mangosteen skin. The surface and structural properties of samples were analyzed with SEM and BET. The specific surface area of the best one reached up to 2 96153 m2/g. 〖JP2〗Then the adsorption isotherms for rhodamine B and Pb2+, adsorption isotherm fitted two common models, Freundlich and Langmuir models were studied. The results show that adsorption isotherm to rhodamine B is best fitted with the Langmuir model, while Pb2+ is both fitted with the Freundlich and Langmuir models. The adsorption capacities towards rhodamine B and Pb2+ reached to 1 22218 mg/g, 10707 mg/g, respectively. 〖JP〗