Efficient continuous biosynthesis of silver nanoparticles by activated sludge micromycetes with enhanced tolerance to metal ion toxicity

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• 作者：Dmitry V. Tyupa^a ; Sergei V. Kalenov^a ; ^{wsezart@yandex.ru" class="auth_mail" title="E-mail the corresponding author} ; ^{wsezart@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Marina M. Baurina^a ; Liubov M. Yakubovich^b ; Alexander N. Morozov^c ; Ruslan M. Zakalyukin^d ; Vladimir V. Sorokin^e ; Dmitry A. Skladnev^e
• 关键词：Nanosilver ; Nanotechnology ; Silver nanoparticles ; Biosynthesis of nanosilver ; NP green biosynthesis
• 刊名：Enzyme and Microbial Technology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：95
• 期：Complete
• 页码：137-145
• 全文大小：2065 K

文摘

The method for producing AgNPs by granules of activated sludge micromycetes with enhanced tolerance to metal ion toxicity − Penicillium glabrum, Fusarium nivale and Fusarium oxysporum has been developed; the optimum conditions for AgNP biosynthesis being found: the Ag⁺ ion concentration, duration of the contact of microbial cells with silver ions, a growth phase of microorganisms, medium composition, a рН value, mixing conditions, and also lighting intensity. The effect of Cl⁻, SO₄²⁻ and HPO₄²⁻ ions binding Ag⁺ ions was eliminated, that brought to significant increase of the yield of NPs. Under batch conditions, silver particles of 60–110 nanometers in size were formed with a 65% yield. It was established that the nanoparticles were covered with microbial cell membrane proteins composed up to 70% by weight of the NPs that prevented their aggregation. In addition, it was the first time stable AgNPs had been formed by continuous AgNP biosynthesis by living cells of F. oxysporum with an 80% yield for a long time.