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Membrane Water Treatment
  Volume 14, Number 3, September 2023 , pages 141-146
DOI: https://doi.org/10.12989/mwt.2023.14.3.141
 


The effects of algal-derived organic matters (AOMs) and chlorinated AOMs on the survival and behavior of zebrafish
Se-Hyun Oh, Jing Wang, Jung Rae Kim and Yunchul Cho

 
Abstract
    Algal organic matters (AOMs) are challenging to remove using traditional water treatment methods. Additionally, they are recognized as disinfection by product (DBP) precursors during the chlorination process. These compounds have the potential to seriously harm aquatic creatures. Despite the fact that AOMs and DBPs formed from algae can harm aquatic species by impairing their cognitive function and causing behavioral problems, only a few studies on the effects of AOMs and associated DBPs have been conducted. To assess the impact of extracellular organic materials (EOMs) produced by three different hazardous algal species and the chlorinated EOMs on zebrafish, this study used fish acute embryo toxicity (FET) and cognitive function tests. With rising EOM concentrations, the embryo's survival rate and mental capacity both declined. Of the three algal species, the embryo exposed to Microcystis aeruginosa EOM exhibited the lowest survival rate. On the other hand, the embryo exposed to EOMs following chlorination demonstrated a drop in CT values in both the survival rate and cognitive ability. These findings imply that EOMs and EOMs treated with chlorine may have detrimental effects on aquatic life. Therefore, an effective EOM management is needed in aquatic environment.
 
Key Words
    algal organic matter(AOM); aquatic ecosystem; FET test; toxicity
 
Address
Se-Hyun Oh and Yunchul Cho: Department of Civil and Environmental Engineering, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 34520, Republic of Korea

Jing Wang: Research and Development Department, CanFit Resource Technologies Inc., 65 Fushi-Ro, Haidian District, Beijing, China

ung Rae Kim: School of Chemical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
 

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