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Effect of hydroxyl radical on harmful microalgae: a potential technology for treatment of ship’s ballast water

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Title Effect of hydroxyl radical on harmful microalgae: a potential technology for treatment of ship’s ballast water
 
Creator Meng, Xiangying
Chen, Cao
Bai, Mindong
Zhang, Zhitao
Cheng, Chao
Ma, Bin
Li, Jiaxin
 
Subject Ballast water treatment
Hydroxyl radical
Strong ionization discharge
Harmful microalgae
Water quality
 
Description 725-734
In this study, the effects of hydroxyl radicals on harmful microalgae in ballast water were investigated experimentally. Using an improvised ballast water treatment system, large concentrations of ·OH were produced and subsequently dissolved in ballast waters of different salinities which are high salinity seawater (HS) and low salinity seawater (LS) in order to eliminate the microalgae. The results show that the outcome of the treatment system fully meets the requirements of G8. At total residual oxidant (TRO) concentrations of 0.41 mg/L and 0.93 mg/L, the maximum concentration of killed algae was observed as 0.5×103 cells/mL and 1×104 cells/mL, respectively. Furthermore, the ·OH efficiently decomposed most organic matter, resulting in an improvement of the ship’s ballast water quality. These results conform to the D-2 ballast water discharge standard of IMO and validate the ·OH as an effective, rapid way of killing algae in the course of conveying the ship’s ballast water.
 
Date 2017-04-05T10:44:40Z
2017-04-05T10:44:40Z
2017-04
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/41105
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.46(04) [April 2017]