%0 Journal Article
%A ZHANG Yu-ting
%A LIN Li
%A JIA Di
%A DONG Lei
%A PAN Xiong
%A LIU Min
%A ZHAO Liang-yuan
%T Inhibiting the Growth of <i>Microcystis aeruginosa</i> by H<sub>2</sub>O<sub>2</sub> Generated in the Electrolysis Process by Low-Amperage Electric Current
%D 2023
%R 10.11988/ckyyb.20220306
%J Journal of Changjiang River Scientific Research Institute
%P 24-31
%V 40
%N 9
%X Platinum titanium served as the anode, while a carbon black polytetrafluoroethylene (C/PTFE) gas diffusion electrode was utilized as the cathode in order to facilitate the production of H<sub>2</sub>O<sub>2</sub> through low-amperage electrolysis, with the aim of inhibiting the growth of Microcystis aeruginosa. Through a series of experimental investigations involving varying electrolysis time, current density, and gas flow, the optimal conditions for inhibiting <i>Microcystis aeruginosa</i> were determined. Specifically, the optimal configuration involved the electrolysis of 100 mL of 5×10<sup>5</sup> cells/mL algae solution at a current density of 10 mA/cm<sup>2 </sup>and a gas flow rate of 0.4 L/min for a duration of 60 minutes. Following electrolysis, the optical density (OD<sub>680</sub>) of the algae cells decreased from 0.035 to 0.003, indicating the complete inhibition of algae cell growth. Additionally, the measurement of chlorophyll fluorescence parameters, such as <i>F</i><sub>v</sub>/<i>F</i><sub>m</sub>, <i>Y</i>(Ⅱ), and <i>Y</i>(NO), demonstrated the substantial disruption to the photosynthetic mechanism of the algae, further indicating the complete decay of the algae population. The concentration of H<sub>2</sub>O<sub>2 </sub>generated during electrolysis was determined to be 79 mg/L. Furthermore, even after six cycles of reuse, the C/PTFE cathode maintained 66% (52 mg/L) of the initial H<sub>2</sub>O<sub>2</sub> concentration, highlighting the excellent stability and promising application potential of the C/PTFE electrode. This study presents a novel approach to effectively inhibit cyanobacterial blooms through low-amperage electrolysis, offering a new avenue for remediation.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20220306