Novel treatment of Microcystis aeruginosa using chitosan-modified nanobubbles

被引:25
作者
Nam, Gwiwoong [1 ]
Mohamed, Mohamed M. [2 ,3 ]
Jung, Jinho [1 ]
机构
[1] Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea
[2] United Arab Emirates Univ, Coll Engn, Civil & Environm Engn Dept, Al Ain 15551, U Arab Emirates
[3] United Arab Emirates Univ, Natl Water Ctr, Al Ain 15551, U Arab Emirates
基金
新加坡国家研究基金会;
关键词
Alga; Chitosan; Cyanobacteria; Hydroxyl radical; Nanobubble; DISINFECTION BY-PRODUCTS; DISSOLVED AIR FLOTATION; CELL INTEGRITY; ANTIBACTERIAL ACTIVITY; CYANOBACTERIAL BLOOMS; BUBBLE SURFACE; TOXIN RELEASE; WATER; INACTIVATION; REMOVAL;
D O I
10.1016/j.envpol.2021.118458
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, we treated harmful Microcystis aeruginosa cyanobacteria using chitosan-modified nanobubbles. The chitosan-modified nanobubbles (255 +/- 19 nm) presented a positive zeta potential (15.36 +/- 1.17 mV) and generated significantly (p < 0.05) more hydroxyl radicals than the negatively charged nanobubbles (-20.68 +/- 1.11 mV). Therefore, the interaction between the positively charged chitosan-modified nanobubbles and negatively charged M. aeruginosa (-34.81 +/- 1.79 mV) was favored. The chitosan-modified nanobubble treatment (2.20 x 10(8) particles mL(-1)) inactivated 73.16% +/- 2.23% of M. aeruginosa (2.00 x 10(6) cells mL(-1)) for 24 h without causing significant cell lysis (<= 0.25%) and completely inhibited the acute toxicity of M. aeruginosa toward Daphnia magna. The inactivation was correlated (r(2) = 0.97) with the formation of reactive oxygen species (ROS) in M. aeruginosa. These findings indicated that the hydroxyl radicals generated by the chitosan-modified nanobubbles disrupted cell membrane integrity and enhanced oxidative stress (ROS formation), thereby inactivating M. aeruginosa. Moreover, the penetration of the chitosan-modified nanobubbles and cell alterations in M. aeruginosa were visually confirmed. Our results suggested that the chitosan-modified nanobubble treatment is an eco-friendly method for controlling harmful algae. However, further studies are required for expanding its practical applications.
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页数:8
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共 92 条
[1]   Principle and applications of microbubble and nanobubble technology for water treatment [J].
Agarwal, Ashutosh ;
Ng, Wun Jern ;
Liu, Yu .
CHEMOSPHERE, 2011, 84 (09) :1175-1180
[2]   Influences of Air, Oxygen, Nitrogen, and Carbon Dioxide Nanobubbles on Seed Germination and Plant Growth [J].
Ahmed, Ahmed Khaled Abdella ;
Shi, Xiaonan ;
Hua, Likun ;
Manzueta, Leidy ;
Qing, Weihua ;
Marhaba, Taha ;
Zhang, Wen .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2018, 66 (20) :5117-5124
[3]   SELECTIVE ISOLATION OF BLUE-GREEN ALGAE FORM WATER AND SOIL [J].
ALLEN, MM ;
STANIER, RY .
JOURNAL OF GENERAL MICROBIOLOGY, 1968, 51 :203-&
[4]   Oxidative stress generation by microcystins in aquatic animals: Why and how [J].
Amado, L. L. ;
Monserrat, J. M. .
ENVIRONMENT INTERNATIONAL, 2010, 36 (02) :226-235
[5]   A comparison of the sensitivities of Daphnia magna and Daphnia pulex to six different cyanobacteria [J].
Asselman, J. ;
Hochmuth, J. D. ;
De Schamphelaere, K. A. C. .
HARMFUL ALGAE, 2014, 39 :1-7
[6]   Nanobubble Technologies Offer Opportunities To Improve Water Treatment [J].
Atkinson, Ariel J. ;
Apul, Onur G. ;
Schneider, Orren ;
Garcia-Segura, Sergi ;
Westerhoff, Paul .
ACCOUNTS OF CHEMICAL RESEARCH, 2019, 52 (05) :1196-1205
[7]   Comparison of •OH and NaClO on geosmin degradation in the process of algae colonies inactivation at a drinking water treatment plant [J].
Bai, Mindong ;
Huang, Xiaodian ;
Zhong, Ziqing ;
Cao, Meijun ;
Gao, Ming .
CHEMICAL ENGINEERING JOURNAL, 2020, 393
[8]   •OH Inactivation of Cyanobacterial Blooms and Degradation of Toxins in Drinking Water Treatment System [J].
Bai, Mindong ;
Zheng, Qilin ;
Zheng, Wu ;
Li, Haiyan ;
Lin, Shaoyun ;
Huang, Lingfeng ;
Zhang, Zhitao .
WATER RESEARCH, 2019, 154 :144-152
[9]   Application of a hydroxyl-radical-based disinfection system for ballast water [J].
Bai, Mindong ;
Tian, Yiping ;
Yu, Yixuan ;
Zheng, Qilin ;
Zhang, Xiaofang ;
Zheng, Wu ;
Zhang, Zhitao .
CHEMOSPHERE, 2018, 208 :541-549
[10]   Chitosan as an environment friendly biomaterial - a review on recent modifications and applications [J].
Bakshi, Prasanna S. ;
Selvakumar, D. ;
Kadirvelu, K. ;
Kumar, N. S. .
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 2020, 150 :1072-1083