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- Title
Role of Bipolar Pulsed DBD on the Growth of Microcystis aeruginosa in Three-Phase Discharge Plasma Reactor.
- Authors
Cui-Hua Wang; Guo-Feng Li; Yan Wu; Yu Wang; Jie Li; Duan Li; Ning-Hui Wang
- Abstract
Abstract??Algae in drinking water supplies often bring about impact on the water treatment. In this study, a bipolar pulsed dielectric barrier discharge system in three-phase discharge plasma reactor was constructed for investigating its ability to control excessive growth of cyanobacteria,Microcystis aeruginosa. Experimental results show there was almost no change in optical density immediately after the interruption of electrical discharge, but the decreasing trend of optical density, cell density and chlorophyll-acontent was obvious during the incubation period, indicating a significant residual effect of electrical discharge process on the algal growth inhibition. Scanning electron microscopy investigation of algae revealed surface damage, apparent leakage of intracellular contents and pores formed after electrical discharge process, which showed that algal cells had no potential to survive and grow. Compared with the control sample, it was observed that electrical discharge on the algal extracellular products has almost no residual effect and the growth rate of algae slightly decreased before three days storage. Hydrogen peroxide was produced by electrical discharge in the ?M level and showed a first-order decay. But at such level, the external addition of hydrogen peroxide alone is not likely to cause the residual effect. These results implicated that the growth inhibition ofM. aeruginosawas mainly caused by electrical discharge process, and it made the algal cells lose ability to survive, demonstrating the considerable potential of such an alternative process for efficient water purification.
- Subjects
MICROCYSTIS aeruginosa; CELLS; MICROCYSTIS; CHROOCOCCACEAE
- Publication
Plasma Chemistry & Plasma Processing, 2007, Vol 27, Issue 1, p65
- ISSN
0272-4324
- Publication type
Article
- DOI
10.1007/s11090-006-9044-0