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Functionalized Gold and Silver Bimetallic Nanoparticles Using Deinococcus radiodurans Protein Extract Mediate Degradation of Toxic Dye Malachite Green

Authors Weng Y, Li J, Ding X, Wang B, Dai S, Zhou Y, Pang R, Zhao Y, Xu H, Tian B, Hua Y

Received 1 November 2019

Accepted for publication 22 February 2020

Published 16 March 2020 Volume 2020:15 Pages 1823—1835


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Thomas J. Webster

Yulan Weng, 1 Jiulong Li, 1 Xingcheng Ding, 2 Binqiang Wang, 1 Shang Dai, 1 Yulong Zhou, 3 Renjiang Pang, 1 Ye Zhao, 1 Hong Xu, 1 Bing Tian, 1, 3 Yuejin Hua 1

1MOE Key Laboratory of Biosystems Homeostasis & Protection, Zhejiang University, Hangzhou, People’s Republic of China; 2Zhejiang Runtu Chemical Research Institute, Shaoxing, People’s Republic of China; 3Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, People’s Republic of China

Correspondence: Bing Tian
Zhejiang University Zijingang Campus West Part, A403 Biophysics Building, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
Tel/Fax +86-571-86971215

Background: Biodegradation of toxic organic dye using nanomaterial-based microbial biocatalyst is an ecofriendly and promising technique.
Materials and Methods: Here, we have investigated the novel properties of functionalized Au-Ag bimetallic nanoparticles using extremophilic Deinococcus radiodurans proteins (Drp-Au-AgNPs) and their degradation efficiency on the toxic triphenylmethane dye malachite green (MG).
Results and Discussion: The prepared Drp-Au-AgNPs with an average particle size of 149.8 nm were capped by proteins through groups including hydroxyl and amide. Drp-Au-AgNPs demonstrated greater degradation ability (83.68%) of MG than D. radiodurans cells and monometallic AuNPs. The major degradation product was identified as 4-(dimethylamino) benzophenone, which is less toxic than MG. The degradation of MG was mainly attributed to the capping proteins on Drp-Au-AgNPs. The bimetallic NPs could be reused and maintained MG degradation ability (> 64%) after 2 cycles.
Conclusion: These results suggest that the easily prepared Drp-Au-AgNPs have potential applications as novel nanomedicine for MG detoxification, and nanomaterial for biotreatment of a toxic polyphenyl dye-containing wastewater.

Keywords: bimetallic nanoparticles, Deinococcus radiodurans, biodegradation, toxic triphenylmethane dye, malachite green, detoxification

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