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Effect of copper-core carbon-shell nanoparticles on the growth of cyanobacterium Microcystis aeruginosa and its mechanism


13th International Conference on Advanced Materials and Nanotechnology

OCTOBER 26-28, 2017 OSAKA, JAPAN

Chao Li, Xiao Zhang, Xiong Wang, Manli Li, Fengying Li and Kun Lian

Xi’an Jiaotong University, China
Suzhou GuanJie Nano Antibacterial Coating Technology Co., Ltd., China

ScientificTracks Abstracts: Res. Rev. J Mat. Sci

DOI: 10.4172/2321-6212-C1-008

Abstract

In recent years, frequent occurrence of cyanobacteria bloom has disrupted the balance of lakes and reservoirs around the world. Copper-Core Carbon-Shell Nanoparticles (CCCSNPs), as a novel material, have showed a good antibacterial and anti-mildew performance in previous study. In this study, we tried to demonstrate the potential effect of CCCSNPs on cyanobacterium Microcystis aeruginosa growth and clarify the mechanism to know the application prospects of the material in controlling cyanobacteria bloom. Compared with the widely used algaecides CuSO4, CCCSNPs significantly reduced chlorophyll a content of M aeruginosa when the concentration of Cu2+ in the medium was the same as the CuSO4, so the inhibitory effect of CCCSNPs on algae was better and lasted longer than that of CuSO4. We further explored the mechanism of inhibitory effect, finding that intracellular excess Reactive Oxygen Species (ROS) were produced after exposure to CCCSNPs, which were 2.4 and 1.5-fold higher than the control and the CuSO4 treatment, respectively. Excess ROS formation caused oxidative damage to algae and reduced the photosynthetic efficiency, which further inhibited algal growth. Therefore, it is reasonable to propose that CCCSNPs could induce excess ROS production and further interfere with algal photosynthesis to achieve a satisfactory effect with a longer action time.

Biography

Chao Li has obtained his Bachelor’s degree in Medicine in China and completed his PhD in Biomedicine from Hull University in 2007 where he was mainly engaged in tumor immunology and nanotechnology used for antitumor drugs research. As a Postdoctoral Fellow, he focused on medical nanomaterials at Centre for Nanohealth of Swansea University from 2007 to 2009 and published over 10 research papers in SCI journals.