Characteristics of algal organic matters (AOMs) generated by two different algae species

Se-Hyun Oh , Yunchul Cho

Abstract

Algal organic matters (AOMs) generated during algal blooms is known to lead to deterioration of water quality. In this study, the amounts of AOMs produced by two cyanobacteria such as Anabaena sp. and Oscillatoria sp. were measured during their growth, respectively. The results showed that AOM production continued from the exponential growth phase to the death phase. During the death phase, AOM production seemed to be sustained due to intracellular organic matter (IOM) released by dead cells. It was found that the specific UV absorbance (SUVA) values of extracellular organic matter (EOM) were relatively higher than those of IOMs in two algal species. Meanwhile, LC-OCD and XAD analyses were performed to understand the physicochemical characteristics of AOMs produced during the algal growth phases. The XAD analysis indicated that AOMs generated by both algal species had a high proportion of hydrophilic substances compared to hydrophobic and transphilic ones. The LC-OCD analysis showed that the order of high content of main components of AOMs was were high-molecular-weight biopolymers, humic-like substances, and building blocks.

Key Words

algal organic matter; cyanobacteria;, extracellular organic matter; hydrophobicity; LC-OCD

Address

Se-Hyun Oh — R&D Team, K-AD, 2511 Sejong-ro, Sejong 30019, Republic of Korea
Yunchul Cho — Department of Civil and Environmental Engineering, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 34520, Republic of Korea

PDF Viewer

Preview uses the same access rules as Full Text PDF (subscription, purchase, or open access).

← Back to Volume 17, No. 2