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Anatoxin‐a adsorption by virgin and preloaded granular activated carbon
Author(s) -
Vlad Silvia,
Peldszus Sigrid,
Anderson William B.,
Huck Peter M.
Publication year - 2019
Publication title -
awwa water science
Language(s) - English
Resource type - Journals
ISSN - 2577-8161
DOI - 10.1002/aws2.1116
Subject(s) - adsorption , coal , chemistry , ultrapure water , activated carbon , carbon fibers , aqueous solution , pulp and paper industry , chemical engineering , nuclear chemistry , organic chemistry , materials science , composite material , composite number , engineering
Adsorption of the cyanotoxin anatoxin‐a (ANTX) in ultrapure water by five virgin and preloaded granular activated carbons (GACs) was examined using the bottle‐point technique; this article presents baseline adsorption data for ANTX not yet available in the literature. Of the virgin carbons, the two wood‐based carbons adsorbed ANTX more rapidly than the one coconut‐based or two coal‐based carbons. Virgin coal‐based carbons had the greatest equilibrium capacity (1.8–6.9 μg/mg at 1 μg/L aqueous ANTX) compared with their virgin coconut‐ and wood‐based counterparts (1.2 and 0.9–1.0 μg/mg, respectively). GAC preloading via exposure to surface water resulted in kinetic changes and reduced capacity. Preloaded coal‐based carbons adsorbed ANTX faster than the virgin equivalents. At environmentally relevant ANTX concentrations, coal‐based preloaded carbons retained higher equilibrium capacity (1.2 μg/mg) compared with coconut‐ and wood‐based carbons (1.0 and 0.6 μg/mg, respectively). Natural organic matter competition will affect adsorption performance and should be investigated.