Research on inhibitive behaviors of electrolysis on the growth of Microcystis aeruginosa.
Electrochemical method using a novel Ti/RuO2 anode was employed to inhibit a typical cyanobacteria, Microcystis aeruginosa (M. aeruginosa) under different electrolytic conditions. It is demonstrated that Ti/RuO2 anode was more efficient than traditional graphite anode in M. aeruginosa inhibition. The experimental results showed that the higher current density or longer electrolytic time could effectively improve the inhibition of M. aeruginosa. In addition, sodium chloride was a more effective electrolyte than sodium sulfate to enhance inhibition. The maximum inhibiting rate dose to 100% could be obtained at a current density of 12 mA cm(-2) when sodium chloride was used as a supporting electrolyte. Furthermore, UV-Visible spectra demonstrated that the structures of phycocyanins and chlorophyll a (Chl a) in M. aeruginosa could be changed or destroyed during electrolysis. Moreover, EPR spectra showed the generation of the free radicals through electrolysis, which might be one of the reasons responsible for the inhibition of algal growth.
Xu
Y F
YF
School of Environmental Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Avenue, Shanghai 200240, People's Republic of China.
Yang
J
J
Ou
M M
MM
Wang
Y L
YL
Jia
J P
JP
Pan
H D
HD
D002734:Chlorophyll / Q000737:chemistry / Q000378:metabolism; D000077194:Chlorophyll A; D004563:Electrochemistry; D004566:Electrodes; D004572:Electrolysis; D004573:Electrolytes; D004578:Electron Spin Resonance Spectroscopy; D046931:Microcystis / Q000737:chemistry / Q000254:growth & development*; D010798:Phycocyanin / Q000737:chemistry / Q000378:metabolism; D017975:Ruthenium Compounds / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
D004573:Electrolytes; D017975:Ruthenium Compounds; D010798:Phycocyanin; C029017:ruthenium dioxide; D002734:Chlorophyll; D014025:Titanium; D000077194:Chlorophyll A