Investigating natural organic carbon removal and structural alteration induced by pulsed ultrasound
Article
Article Title | Investigating natural organic carbon removal and structural alteration induced by pulsed ultrasound |
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ERA Journal ID | 3551 |
Article Category | Article |
Authors | Al-Juboori, Raed A. (Author), Yusaf, Talal (Author), Aravinthan, Vasantha (Author) and Bowtell, Leslie (Author) |
Journal Title | Science of the Total Environment |
Journal Citation | 541, pp. 1019-1030 |
Number of Pages | 12 |
Year | 2016 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0048-9697 |
1879-1026 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.scitotenv.2015.09.143 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0048969715308007 |
Abstract | The application of pulsed ultrasound for DOC removal from natural water samples has been thoroughly investigated in this work. Natural water samples were treated with ultrasound at power levels of 48 and 84 W with treatment times of 5 and 15 min. Chemical fractionation was conducted for both untreated and treated samples to clearly identify the change in DOC structure caused by ultrasonic treatments. Statistical analyses applying 23 factorial design were performed to study the behaviour of the response (i.e. DOC removal) under different operating conditions. Overall, ultrasonic treatments resulted in DOC removal of 7–15% depending on the applied operating conditions. The treated water had high microbial loading that interferedwith DOC removal due primarily to the release of microbial productswhen exposed to ultrasound. Pulse ultrasound was found to bemore effective than the continuousmode for DOC removal at the same effective power level. A regression modelwas developed and tested for DOC removal prediction. The modelwas adequate in predicting DOC removal with a maximum deviation from the experimental data of <11%. Pulsed ultrasound at low power levels and short treatment times was found to be the most energy efficient treatment for DOC removal. |
Keywords | pulsed ultrasound; natural water; DOC; chemical fractionation; factorial design; microbial load |
ANZSRC Field of Research 2020 | 400411. Water treatment processes |
340501. Free radical chemistry | |
401102. Environmentally sustainable engineering | |
401701. Acoustics and noise control (excl. architectural acoustics) | |
410404. Environmental management | |
400899. Electrical engineering not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Civil Engineering and Surveying |
School of Mechanical and Electrical Engineering | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3379/investigating-natural-organic-carbon-removal-and-structural-alteration-induced-by-pulsed-ultrasound
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