Removal of polycyclic aromatic hydrocarbons (PAHs) from hot water extract of dried bonito processing residue using activated carbon
2015
Kasane, G. (Tokyo University of Marine Science and Technology, Minato, Tokyo (Japan). Department of Ocean Sciences) | Okada, M. | Endo, H. | Ren, H.
As part of our ongoing study for safely and effectively using dried bonito processing residue while considering its useful components, we investigated the optimal conditions for removal of polycyclic aromatic hydrocarbons (PAHs) from dried bonito processing residue. First, as model sample, we added 3217 micro g/L of PAHs to a hot water extract of processing residues to verify the PAH removal rate with activated carbon. The maximum PAH removal rate was 99.6%, and the PAH removal rate was found to be dependent on the type of activated carbon. We then performed PAH extraction on two commercially available 'kuroko' (dried bonito shavings powder) products using hot water, ethanol, and ethyl acetate, and analyzed the PAH amount in each extract. The highest amount of PAHs (12823 micro g/L) was detected in the ethanol extract, revealing that commercial products contain highly concentrated PAHs.
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