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Effect of Calcium on Thermal Regeneration of GAC
Author(s) -
Knappe Detlef R. U.,
Dagois Gérard,
DeWolfe James R.
Publication year - 1992
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.1551-8833.1992.tb07414.x
Subject(s) - calcium , regeneration (biology) , chemistry , yield (engineering) , chemical engineering , chelation , inorganic chemistry , materials science , metallurgy , organic chemistry , biology , microbiology and biotechnology , engineering
Calcium commonly accumulates on granular activated carbon (GAC), and when it is chelated by natural organic matter (NOM), it is drawn into the pores of the GAC. Internally loaded calcium greatly catalyzes regeneration reactions, leading to accelerated internal mass loss. Optimal conditions for the regeneration of a GAC not loaded with calcium lead to severe overregeneration if applied to a calcium‐loaded GAC. The pore structure and capacity of the GAC are adversely affected by this overregeneration. The authors of this article found that calcium‐loaded GACs could be regenerated to yield a GAC with the properties of the virgin GAC by reducing the regeneration time or temperature.