Adsorption properties of modified activated carbon onto amonia

Chemical characteristics and adsroption properties onto amonia of modified activated carbon are studied by using Bothem′s titration and dynamic adsorption method.The test results show that activated carbon modified by citric acid and NaOH can increase the content of surface acidic functional group,increase surface hydrophilicity and total acidity of activated carbor.Moreover,saturated time of activated carbon modified by 45% NaOH solution is significantly greater than that of activated carbon treated by citric acid.