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Preparation of a colored conductive paint electrode for electrochemical inactivation of bacteria
Author(s) -
Lim TaeKyu,
Murakami Tadataka,
Tsuboi Makoto,
Yamashita Kazuharu,
Matsunaga Tadashi
Publication year - 2002
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.10469
Subject(s) - electrode , saturated calomel electrode , electrochemistry , colored , seawater , bacteria , materials science , auxiliary electrode , chemical engineering , chlorine , chemistry , nuclear chemistry , working electrode , organic chemistry , composite material , biology , ecology , genetics , engineering , electrolyte
Abstract In this study we describe the preparation of a colored conductive paint electrode containing In 2 O 3 , SnO 2 , or TiO 2 for the electrochemical inactivation of marine bacteria. When each colored conductive paint electrode was immersed in seawater containing 10 6 cells/mL for 90 min, marine microbe attachment to the TiO 2 /SnO 2 /Sb electrode surface was minimal. Preparation of electrodes coated with 40% particles is shown to be more cost‐effective, and because of their more translucent coatings they can be painted over with bright colors. When a potential of 1.0 V was applied for 30 min to the colored conductive paint electrode (40 wt% TiO 2 /SnO 2 /Sb) in sterile seawater, the survival ratio decreased to 55%. When 1.5 V vs. saturated calomel electrode (SCE) was applied, all attached cells were inactivated. Chlorine was not detected below an applied potential of 1.5 V. A change in pH was not observed in the range of 0 to 1.5 V. This method might be effective for preventing bacterial cell accumulation and the formation of biofilms. © 2003 Wiley Periodicals, Inc. Biotechnol Bioeng 81: 299–304, 2003.