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Original Article

Inhibition of the Algal Growth using TiO2-embedded Expanded Polystyrene (EPS) balls in Lab-scale Outdoor Experiment
Ga Young Kim1
,
Jin Chul Joo2*
,
Bo Reum Ahn1
,
Dae Hong Lee2
,
Jae Roh Park3*
,
Chang Hyuk Ahn3
,
Jong Min Oh4
,
,
,
,
,
,
1Environmental Engineering, Hanbat National University, Daejeon 34158, master’s course
2Civil & Environmental Engineering, Hanbat National University, Daejeon 34158, Professor
3Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Gyeonggi-Do 10223, Research Fellow* (J. R. Park), Senior Researcher (C. H. Ahn)
4Department of Environmental Science and Engineering, Kyung Hee University, Gyeonggi-Do 17104, Professor
* Corresponding Author
30 September 2018. pp. 174-179
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Abstract

TiO2-embedded expanded polystyrene (TiEPS) balls with powdered TiO2 particles embedded on the surface of EPS were developed, and the growth inhibition of Chlorella ellipsoidea, a green algae, was evaluated. The experiment was conducted using four reactors with various conditions of (A) natural sunlight, (B) natural sunlight + TiEPS balls, (C) dark, and (D) dark + TiEPS balls on the roof of the building during five days. Based on the analysis of cell number, cell morphology, concentrations of chlorophyll-a and phaeopigments, both surface reactions in heterogeneous photocatalysis and light shielding could inhibit the growth of C. ellipsoidea. The highly reactive hydroxyl radicals (OH･) from TiEPS balls degraded the lipid cell membrane through the peroxidation reaction with the light shielding, eventually resulting in cell inactivation. Although dominant inhibitory effects on the growth of C. ellipsoidea were ambiguous, TiEPS balls were feasible to prevent and inhibit the excessive growth of algae in eutrophic water body.

Keywords
Algae
Chlorella ellipsoidea
Inhibitory effects
Light shielding
Photocatalysis
TiO2-embedded expanded polystyrene balls

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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 5
  • No :3
  • Pages :174-179
  • Received Date : 2018-09-12
  • Revised Date : 2018-09-25
  • Accepted Date : 2018-09-27
  • DOI :https://doi.org/10.17820/eri.2018.5.3.174
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