Enhancement effect of zero-valent iron nanoparticle and iron oxide nanoparticles on dark fermentative hydrogen production from molasses-based distillery wastewater

2021 ◽  
Author(s):  
Sameena Naaz Malik ◽  
Rena ◽  
Sunil Kumar
Keyword(s):  
Iron Oxide ◽  
Hydrogen Production ◽  
Iron Oxide Nanoparticles ◽  
Zero Valent Iron ◽  
Oxide Nanoparticles ◽  
Enhancement Effect ◽  
Iron Nanoparticle ◽  
Fermentative Hydrogen Production ◽  
Distillery Wastewater ◽  
Fermentative Hydrogen

scholarly journals Hybrid Beads of Zero Valent Iron Oxide Nanoparticles and Chitosan for Removal of Arsenic in Contaminated Water

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2876
Author(s):  
Mian Fawaz Ahmed ◽  
Muhammad Asad Abbas ◽  
Azhar Mahmood ◽  
Nasir M. Ahmad ◽  
Hifza Rasheed ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Ph Value ◽  
Zero Valent Iron ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Contaminated Water ◽  
Contact Period ◽  
Removal Of Arsenic ◽  
Optimized Conditions

Water contaminated with highly hazardous metals including arsenic (As) is one of the major challenges faced by mankind in the present day. To address this pressing issue, hybrid beads were synthesized with various concentrations of zero valent iron oxide nanoparticles, i.e., 20% (FeCh-20), 40% (FeCh-40) and 60% (FeCh-60) impregnated into a polymer of chitosan. These hybrid beads were employed as an adsorbent under the optimized conditions of pH and time to facilitate the efficient removal of hazardous arsenic by adsorption cum reduction processes. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer- Emmett-Teller BET, a porosity test and wettability analysis were performed to characterize these hybrid beads. The porosity and contact angle of the prepared hybrid beads decreased with an increase in nanoparticle concentration. The effects of various adsorption factors such as adsorbent composition, contact period, pH value and the initial adsorbate concentration were also evaluated to study the performance of these beads for arsenic treatment in contaminated water. FeCh-20, FeCh-40 and FeCh-60 have demonstrated 63%, 81% and 70% removal of arsenic at optimized conditions of pH 7.4 in 10 h, respectively. Higher adsorption of arsenic by FeCh-40 is attributed to its optimal porosity, hydrophilicity and the presence of appropriate nanoparticle contents. The Langmuir adsorption kinetics described the pseudo second order. Thus, the novel beads of FeCh-40 developed in this work are a potent candidate for the treatment of polluted water contaminated with highly toxic arsenic metals.

scholarly journals Transferrin-Decorated Niosomes with Integrated InP/ZnS Quantum Dots and Magnetic Iron Oxide Nanoparticles: Dual Targeting and Imaging of Glioma

2021 ◽  
Vol 22 (9) ◽  
pp. 4556
Author(s):  
Didem Ag Seleci ◽  
Viktor Maurer ◽  
Firat Baris Barlas ◽  
Julian Cedric Porsiel ◽  
Bilal Temel ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Glioma Cells ◽  
Oxide Nanoparticles ◽  
Enhancement Effect ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Nanoscale Systems ◽  
Magnetic Iron Oxide

The development of multifunctional nanoscale systems that can mediate efficient tumor targeting, together with high cellular internalization, is crucial for the diagnosis of glioma. The combination of imaging agents into one platform provides dual imaging and allows further surface modification with targeting ligands for specific glioma detection. Herein, transferrin (Tf)-decorated niosomes with integrated magnetic iron oxide nanoparticles (MIONs) and quantum dots (QDs) were formulated (PEGNIO/QDs/MIONs/Tf) for efficient imaging of glioma, supported by magnetic and active targeting. Transmission electron microscopy confirmed the complete co-encapsulation of MIONs and QDs in the niosomes. Flow cytometry analysis demonstrated enhanced cellular uptake of the niosomal formulation by glioma cells. In vitro imaging studies showed that PEGNIO/QDs/MIONs/Tf produces an obvious negative-contrast enhancement effect on glioma cells by magnetic resonance imaging (MRI) and also improved fluorescence intensity under fluorescence microscopy. This novel platform represents the first niosome-based system which combines magnetic nanoparticles and QDs, and has application potential in dual-targeted imaging of glioma.

scholarly journals Kinetics of Nano-catalysed Dark Fermentative Hydrogen Production from Distillery Wastewater

2014 ◽  
Vol 54 ◽  
pp. 417-430 ◽  
Author(s):  
Sameena. N. Malik ◽  
V. Pugalenthi ◽  
Atul. N. Vaidya ◽  
Prakash. C. Ghosh ◽  
Sandeep. N. Mudliar
Keyword(s):  
Hydrogen Production ◽  
Fermentative Hydrogen Production ◽  
Distillery Wastewater ◽  
Fermentative Hydrogen ◽  
Kinetics Of

Enhancement effect of hematite nanoparticles on fermentative hydrogen production

2011 ◽  
Vol 102 (17) ◽  
pp. 7903-7909 ◽  
Author(s):  
Hongliang Han ◽  
Maojin Cui ◽  
Liling Wei ◽  
Haijun Yang ◽  
Jianquan Shen
Keyword(s):  
Hydrogen Production ◽  
Enhancement Effect ◽  
Hematite Nanoparticles ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen

scholarly journals Supplementation of green-synthesized nickel oxide nanoparticles enhances biohydrogen production of Klebsilla sp. using lignocellulosic hydrolysate and elucidation of the regulatory mechanism

2021 ◽  
Author(s):  
Qin Zhang ◽  
Siyuan Xu ◽  
Yanbin Li ◽  
Pengfei Ding ◽  
Yonggui Zhang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Hydrogen Production ◽  
Nickel Oxide ◽  
Production System ◽  
Regulatory Mechanism ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen ◽  
Nio Nps

Abstract Background In recent years, adding nanoparticles to fermentative hydrogen production system has become an effective way to increase the biohydrogen yield, however, the application of green synthesized nanoparticles to hydrogen production system is rarely studied, even to the interpretation of the regulatory mechanism, there are few reports on the regulation of hydrogen production pathway and related gene expression by addition of nanoparticles. Thus, we herein reported the green synthesis of nickel oxide nanoparticles (NiO-NPs) from Eichhornia crassipes (Ec) extract for the first time, and evaluated the regulatory effect of these NPs on fermentative hydrogen production. Results Characterization of the Ec-NiO-NPs revealed their spherical shape, small diameter (9.1 ± 2.6 nm) and high purity. The maximum cumulative hydrogen production and hydrogen yield Y(H2/S) reached 4842.19 ± 23.43 mL/L and 101.45 ± 3.32 mL/gsubstrate, respectively, in the presence of 20 mg/L Ec-NiO-NP, which were 47.29% and 37.78% higher than the control without NPs addition. Evaluation of glucose and xylose utilization efficiency as well as key node metabolites further established the potential of Ec-NiO-NP to improve the reducing sugar utilization and metabolic flux distribution in hydrogen synthesis pathway. Furthermore, addition of 20 mg/L Ec-NiO-NP resulted in enhanced hydrogenase activity with a maximum increase of 623% comparing to the control, and led to changes in the gene expression of both hydrogenase and formate-hydrogen lyase, which play important roles in promoting hydrogen production at different stages of fermentation. Conclusions The results prove that supplementation with green-synthesized Ec-NiO-NP effectively improves fermentative hydrogen production and regulates key node metabolites alteration and functional gene expression. This study provides a cheap and eco-friendly method to enhance fermentative hydrogen production and new insights to reveal the regulatory mechanism underlying NP mediated increases in biohydrogen synthesis.

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