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Cho, Jaeweon
OWIELAB(Organic-Water Interface Engineering Laboratory)
Research Interests
  • Convergence of Science and Arts, Feces Standard Money (FSM), Water & Energy

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Effect of dissolved organic matter on the growth of algae, Pseudokirchneriella subcapitata, in Korean lakes: The importance of complexation reactions

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Title
Effect of dissolved organic matter on the growth of algae, Pseudokirchneriella subcapitata, in Korean lakes: The importance of complexation reactions
Author
Lee, JihoPark, Ji HyungShin, Yong SikLee, Byung CheunChang, Nam IkCho, JaeweonKim, Sang Don
Keywords
Bioavailability; Dissolved organic matter (DOM); Iron; Pseudokirchneriella subcapitata
Issue Date
2009-02
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, v.72, no.2, pp.335 - 343
Abstract
The objective of this study was to investigate the effect of dissolved organic ligands, such as EDTA, humic acids, hydrophobic and hydrophilic fractions of dissolved organic matter (DOM), on the growth of Pseudokirchneriella subcapitata in cultured media and natural lake waters. The growth of algae was gradually increased on the addition of dissolved organic ligands, but markedly declined at high concentrations, due to reduced bioavailable iron concentrations (e.g., Fe3+ and Fe'-inorganic ferric iron). The results demonstrated that the high growth rates of P. subcapitata were correlated with the hydrophobic, but not hydrophilic, DOM from five lakes, spiked under the nutrients-controlled conditions. This was attributed to the role of DOM in controlling the bioavailable iron due to complexation of Fe(III) with -COOH and -OH functional groups on the hydrophobic DOM. Therefore, the hydrophobic DOM, as chelating agent, is a biologically important component in the lake waters, which affects the algal growth by interacting with bioavailable iron in the lake water and can change the results of bioassay experiments. (C) 2008 Elsevier Inc. All rights reserved
URI
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DOI
10.1016/j.ecoenv.2008.01.013
ISSN
0147-6513
Appears in Collections:
UEE_Journal Papers
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