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14 C‐MIB adsorption on PAC in natural water
Author(s) -
Gillogly Thomas E.T.,
Snoeyink Ver L.,
Elarde Joseph R.,
Wilson Claude M.,
Royal Earl P.
Publication year - 1998
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1998.tb08364.x
Subject(s) - adsorption , diffusion , chemistry , kinetic energy , activated carbon , homogeneous , analytical chemistry (journal) , chromatography , thermodynamics , physics , quantum mechanics
A new way of measuring very low concentrations of MIB allows calculation of the PAC dose needed to mitigate odors caused by MIB. Kinetic and equilibrium studies using five powdered activated carbons (PACs) and 14 C‐labeled 2‐methylisoborneol (MIB) in Lake Michigan water produced guidelines for determining the dose of PAC needed to remove MIB. The equilibrium data, supported by predictions from the equivalent background compound competitive adsorption model, indicate that the percent MIB remaining at equilibrium is a function of the carbon dosage, independent of the initial MIB concentration. Kinetic experiments, analyzed in terms of the homogeneous surface diffusion model, demonstrated that the surface diffusion coefficient, D s , is independent of both carbon dosage and initial MIB concentration. Together these equilibrium and kinetic studies show that for any given PAC dosage in natural water and for any fixed time of contact, the percent MIB remaining in an ideal reactor is independent of the initial MIB concentration. Thus the PAC dosage required to mitigate any MIB episode for any contact time of interest may be quickly determined from a C t / C 0 × 100 percent versus C c plot. These studies have also exhibited a new application of 14 C‐MIB allowing for the rapid collection of reproducible and accurate adsorption data.