In situ formation of AgNPs on S-cerevisiae surface as bionanocomposites for bacteria killing and heavy metal removal
In situ formation of AgNPs on S-cerevisiae surface as bionanocomposites for bacteria killing and heavy metal removal
复制标题
在酿酒酵母表面原位形成 AgNP 作为生物纳米复合材料用于杀菌和去除重金属
DOI：
10.1007/s13762-017-1261-y
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发表时间：
2017-08-01
影响因子：
3.1
通讯作者：
Feng, T.
中科院分区：
文献类型：
--
作者：
Chen, Z.;Li, Z.;Feng, T.
新型生物纳米复合材料，S。通过在S.在模拟阳光下，以富里酸为还原剂，在酿酒酵母菌表面进行还原。S.采用紫外-可见光谱、扫描电镜、透射电镜和傅里叶变换红外光谱对纳米银进行了表征。这些分析表明，AgNPs分布在S.啤酒。应用S.研究了纳米银粒子在杀菌和去除重金属方面的应用。S. AgNPs能有效抑制大肠杆菌的生长。大肠杆菌中，随着S.银纳米粒子。e.大肠杆菌在高浓度S.银纳米粒子（例如，100或200 μ g mL（-1））。S.银纳米粒子作为优良的重金属吸附剂也进行了研究。以Cd2+为模型重金属，静态吸附实验表明，S. AgNPs的平均含量为15.01 mg g（-1）。根据吸附数据，研究了S.银纳米粒子的降解遵循准二级动力学模型。此外，S.银纳米粒子具有去除不同重金属的能力（例如，Cr~（5+）、As~（5+）、Pb~（2+）、Cu~（2+）、Mn~（2+）、Zn~（2+）、Hg~（2+）、Ni~（2+）。以含大肠杆菌的模拟污染水为研究对象。coli、Cd 2+和Pb 2+用S.银纳米粒子。结果表明，该复合材料可用于开发水处理抗菌剂和生物修复剂。
Novel bionanocomposites, S. cerevisiae-AgNPs, were synthesized by in situ formation of AgNPs on S. cerevisiae surface using fulvic acids as reductants under simulated sunlight. S. cerevisiae-AgNPs were characterized using UV-Vis spectroscopy, scanning electron microscope, transmission electron microscope and Fourier transform infrared spectroscopy. These analyses showed that AgNPs were distributed on the surface of S. cerevisiae. The application of S. cerevisiae-AgNPs in bacteria killing and heavy metal removal was studied. S. cerevisiae-AgNPs effectively inhibited the growth of E. coli with increasing concentrations of S. cerevisiae-AgNPs. E. coli was killed completely at high concentration S. cerevisiae-AgNPs (e.g., 100 or 200 A mu g mL(-1)). S. cerevisiae-AgNPs as excellent heavy metal absorbents also have been studied. Using Cd2+ as model heavy metal, batch experiments confirmed that the adsorption behavior fitted the Langmuir adsorption isotherms and the Cd2+ adsorption capacity of S. cerevisiae-AgNPs was 15.01 mg g(-1). According to adsorption data, the kinetics of Cd2+ uptake by S. cerevisiae-AgNPs followed pseudo second-order kinetic model. Moreover, S. cerevisiae-AgNPs possessed ability of different heavy metals' removal (e.g., Cr5+, As5+, Pb2+, Cu2+, Mn2+, Zn2+, Hg2+, Ni2+). The simulated contaminated water containing E. coli, Cd2+ and Pb2+ was treated using S. cerevisiae-AgNPs. The results indicated that the bionanocomposites can be used to develop antibacterial agents and bioremediation agents for water treatment.