2023 Volume 79 Issue 25 Article ID: 23-25005
In drinking water treatment, 2-methylisoborneol (2-MIB) removal rate by powdered activated carbon (PAC) can be reduced by natural organic matter (NOM). Algal organic matter (AOM) is a part of NOM in water environment. But the competitive effects of AOM on 2-MIB removal by PAC treatment under non-equilibrium conditions have not been investigated. In order to clarify competitive effects of AOM on 2-MIB removal by powdered activated carbon treatment under non-equilibrium conditions, we evaluated the competitive effects of organic matter produced by Microcystis aeruginosa and estimated the competing compounds in M. aeruginosa-produced organic matter. M. aeruginosa-produced organic matter contained some competitive compounds for the removal of 2-MIB by PAC treatment. It is suggested that these compounds are tryptophan-like fluorescent substances and fulvic acid-like fluorescent substances. The results obtained in this study suggested that culture solutions of all M. aeruginosa strains (NIES-87, 102, 604, 1053) effected competitive adsorption on PAC treatment, indicating that competitive compounds are present in the M. aeruginosa-produced organic matter.
