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Effect of chloride on bacterial inactivation by discharge plasma at the gas‐solution interface: Potentiation or attenuation?
Author(s) -
Ke Zhigang,
Chen Zhu,
Huang Qing
Publication year - 2018
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201700153
Subject(s) - chemistry , chlorine , hydrogen peroxide , chloride , bacillus subtilis , plasma , nitrite , inorganic chemistry , biophysics , biochemistry , bacteria , nitrate , organic chemistry , physics , quantum mechanics , biology , genetics
Bacterial inactivation by discharge plasma at the gas‐solution interface is affected by many factors. Chloride is essential for all life, but whether chloride can modulate the compositions and levels of plasma‐produced reactive species and consequently influence the bactericidal efficiency is still undefined. In this work, the plasma‐induced inactivation behavior of Gram‐negative Escherichia coli and Gram‐positive Bacillus subtilis without or with the presence of chloride were investigated. Potentiation effect of chloride on bacterial inactivation was observed for O 2 plasma, but attenuation effect was discovered for N 2 and air plasmas. For unveiling the underlying mechanisms, the influence of chloride on the production of reactive species including chlorine, hydroxyl radical, hydrogen peroxide and nitrite was examined.