| Ultrasonic frequency effects on the removal of Microcystis aeruginosa. | |
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MedLine Citation:
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PMID: 16360333 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Algae bloom in source water causes high chemical consumption and deteriorates water quality in waterworks. This paper studied the ultrasonic removal of Microcystis aeruginosa. The results showed that algae cells could be effectively removed by sonication and gas vesicle collapse was the main mechanism. The ultrasonic algae removal followed the first order reaction with a rate constant of 0.023 min(-1) (80 W, 80 kHz). Higher ultrasound frequency benefited algae removal; the algae removal rate constant was 0.114 min(-1) at 1320 kHz and 0.0224 min(-1) at 20 kHz (80 W). Higher ultrasound power also accelerated algae removal; the algae removal rate constant was 0.023 min(-1) at 80 W and 0.007 min(-1) at 32 W (80 kHz). However, high ultrasound power and long irradiation caused microcystins to increase. 80 W, 80 kHz sonication for 5 min increased the extracellular microcystins concentration from 0.87 microg/L to 3.11 microg/L. Sound frequency had little impact on the microcystins release. The chlorophyll a concentration initially decreased and then stabilized after 5 min of sonication. |
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Authors:
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Guangming Zhang; Panyue Zhang; Bo Wang; Hong Liu |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-12-19 |
Journal Detail:
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Title: Ultrasonics sonochemistry Volume: 13 ISSN: 1350-4177 ISO Abbreviation: Ultrason Sonochem Publication Date: 2006 Jul |
Date Detail:
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Created Date: 2006-05-22 Completed Date: 2006-08-16 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9433356 Medline TA: Ultrason Sonochem Country: Netherlands |
Other Details:
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Languages: eng Pagination: 446-50 Citation Subset: IM |
Affiliation:
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Shenzhen Graduate School, Tsinghua University, Shenzhen 518055, China. zhanggm@sz.tsinghua.edu.cn |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algae
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metabolism* Chemistry / methods Chlorophyll / chemistry Free Radicals Kinetics Microcystis / metabolism* Sonication Ultrasonics Water Microbiology* Water Pollutants / metabolism* Water Purification / methods* |
| Chemical | |
Reg. No./Substance:
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0/Free Radicals; 0/Water Pollutants; 1406-65-1/Chlorophyll; 479-61-8/chlorophyll a |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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