麦草碱木素基活性炭对苯酚吸附的研究

Adsorption of Phenol by Wheat Straw Alkaline Lignin-based Activated Carbon

中文关键词:  碳酸钾  麦草碱木素  活性炭  吸附  苯酚

Key Words:K2CO3  wheat straw alkaline lignin  activated carbon  adsorption  phenol

中文摘要:

      在无水碳酸钾与麦草碱木素质量比4∶1、活化温度800℃、活化时间1 h的条件下制备麦草碱木素基活性炭，探讨了麦草碱木素基活性炭对苯酚的吸附作用。结果表明，麦草碱木素基活性炭的得率为17.9%，碘吸附值为827.5 mg/g；用麦草碱木素基活性炭处理100 mL苯酚溶液时，当苯酚初始质量浓度250 mg/L、麦草碱木素基活性炭投加量0.1 g、吸附温度30℃、苯酚溶液pH值约7时，麦草碱木素基活性炭对苯酚的吸附于80 min时达到平衡。麦草碱木素基活性炭对苯酚的吸附行为可用Langmuir等温式描述。

Abstract:

      Wheat straw alkaline lignin-based activated carbon was prepared under the following experimental conditions: ratio of anhydrous K2CO3 and wheat straw alkaline was 4∶1, activating temperature was 800℃, activating time was 1 h. The yield of the activated carbon was 17.9%, the adsorption number of iodine reached 827.5 mg/g. When 100 mL phenol solution with initial concentration of phenol 250 mg/L was treated by the activated carbon, dosage of the activated carbon was 0.1 g, and the temperature was 30℃, the solution pH value was about 7, the time for adsorption equilibrium was 80 min. The adsorption behavior of activated carbon on phenol could be described by Langmuir isotherm equation.