The scale-up of activated carbon columns for water purification, based on results from batch tests—I : Theoretical and experimental determination of adsorption rates of single organic solutes in batch tests

✍ Scribed by H. Spahn; E.U. Schlünder

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 766 KB
• Volume: 30
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(75)80023-6

✦ Synopsis

Ah&act-Mass transfer coefficients for external and internal transport were determined using experimentally established time-concentration curves in batch tests for the adsorption of organic impurities from water on activated carbon particles. These tests revealed that the mass transfer coefficient for internal transport depended on the initial concentration of the adsorbates in the water, the concentration in the carbon and the Biot number. It is wrong, therefore, to assume that the mass transfer coefficient for internal transport is constant, when calculating concentrations in activated carbon columns, even though it is normally taken to be constant in technical literature.

Assuming film and pore diffusion and irreversible adsorption, the rate of adsorption may be obtained as an analvtical function of the concentration of the adsorbates in water and carbon and the Biot-number. Experimental and iheoretical results agree satisfactorily.