Ammonium Persulfate Oxidized Activated Carbon Fibers: Analysis of Their Oxidation Debris Quantity and Their Use for Aqueous Pb(II) Batch and Column Experiments

作者：Aguilar Karla Marlene Mena; Amano Yoshimasa; Machida Motoi

来源：Journal of Fiber Science and Technology, 2017, 73(7): 150-157.

DOI：10.2115/fiberst.2017-0021

In our previous publication, we discussed the ammonium persulfate oxidation conditions of an activated carbon fiber and its use for the removal of aqueous lead. Results showed that oxidation at long times and at mild oxidant concentrations gave a high adsorption capacity for Pb(II) (2.7 mmol g(-1)), but at the same time, the porous structure of the fiber was highly decreased (385 m(2) g(-1)). In the present study, we present recent results that showed that using higher concentrations of oxidant at shorter times could give similar high adsorption capacities, with the difference that the big specific surface area of the fibers remained almost unchanged (ca. 1500 m(2) g(-1)). Moreover, the oxidized activated carbon fibers were characterized by their amount of soluble compounds in NaOH (oxidation debris), and it was determined to be less for samples produced at shorter oxidation times. Additionally, column adsorption-desorption experiments were done for a single metal solution of Pb(II) and for a mixture solution of Pb(II), Cd(II) and Ni(II), where Pb(II) ion was found to be preferably adsorbed by the oxidized activated carbon fiber.

• 出版日期2017-7