scholarly journals Nanoscale Zerovalent Iron Based Moderation of Chromium Stress in Tomato Seedlings is Related with Induced Antioxidants and Suppressed Cr Uptake

2021 ◽  
Vol 5 (4) ◽  
pp. 390-404
Author(s):  
Syeda Iqra Batool ◽  
◽  
Muhammad Dawood ◽  
Muhammad Nawaz ◽  
Zaffar Malik ◽  
...  
Keyword(s):  
Zerovalent Iron ◽  
Tomato Seedlings ◽  
Nanoscale Zerovalent Iron ◽  
Chromium Stress ◽  
Iron Based ◽  
Cr Uptake

Designing of a nanoscale zerovalent iron@fly ash composite as efficient and sustainable adsorbents for hexavalent chromium (Cr(VI)) from water

2021 ◽  
Author(s):  
Shubhangi Madan ◽  
Urvashi Thapa ◽  
Sangeeta Tiwari ◽  
Sandeep Kumar Tiwari ◽  
Suresh Kumar Jakka ◽  
...  
Keyword(s):  
Fly Ash ◽  
Hexavalent Chromium ◽  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron

scholarly journals Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jien Ye ◽  
Yi Wang ◽  
Qiao Xu ◽  
Hanxin Wu ◽  
Jianhao Tong ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
Bimetallic Nanoparticles ◽  
Chemical Reduction ◽  
Particle Surface ◽  
Zerovalent Iron ◽  
Order Model ◽  
X Ray ◽  
Nanoscale Zerovalent Iron

AbstractPassivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.

scholarly journals Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

2014 ◽  
Vol 280 ◽  
pp. 504-513 ◽  
Author(s):  
Yiming Su ◽  
Adeyemi S. Adeleye ◽  
Xuefei Zhou ◽  
Chaomeng Dai ◽  
Weixian Zhang ◽  
...  
Keyword(s):  
Zerovalent Iron ◽  
Contaminated Groundwater ◽  
Nanoscale Zerovalent Iron

In vitro biocompatibility of nanoscale zerovalent iron particles (NZVI) synthesized using tea polyphenols

2010 ◽  
Vol 12 (1) ◽  
pp. 114-122 ◽  
Author(s):  
Mallikarjuna N. Nadagouda ◽  
Alicia B. Castle ◽  
Richard C. Murdock ◽  
Saber M. Hussain ◽  
Rajender S. Varma
Keyword(s):  
Tea Polyphenols ◽  
Zerovalent Iron ◽  
Iron Particles ◽  
Nanoscale Zerovalent Iron ◽  
In Vitro Biocompatibility

scholarly journals Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

2020 ◽  
Author(s):  
Sanjesh Tiwari ◽  
Anuradha Patel ◽  
Sheo Mohan Prasad
Keyword(s):  
Nitrogen Metabolism ◽  
Uptake Rate ◽  
Paddy Field ◽  
Growth Parameter ◽  
Glutamate Synthase ◽  
Nostoc Muscorum ◽  
Biochemical Constituent ◽  
Diazotrophic Cyanobacteria ◽  
Chromium Stress ◽  
Cr Uptake

Abstract Current study deals with the assuaging effects of two phytohormones; indole acetic acid (IAA; 290 nM) and kinetin (KN; 10 nM) on growth, phycobiliproteins, status of nitrogen metabolism and biochemical constituents; protein, carbohydrate and exopolysaccharide contents in two diazotrophic cyanobacteria Nostoc muscorum and Anabaena exposed to chromium (CrVI) stress (100 µM and 150 µM). Chromium individually at both the tested doses expressively declined the growth, chlorophyll a to carotenoid ratio and contents of phycobiliproteins; phycocyanin (PC), allophycocyanin (APC), and phycoerythrin (PE). With distinctive impact on status of nitrogen metabolism chromium significantly reduced the nitrate (NO3—) and nitrite (NO2—) uptake rate and foremost decrease in nitrate and ammonia assimilating enzyme; nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthase (GOGAT) except glutamate dehydrogenase (GDH). However, beneath alike condition, exogenous application of IAA and KN exhibited noteworthy assuaging effects on growth-regulating parameters in both the paddy field cyanobacteria, which consummately occurred as a result of substantial decrease in Cr uptake and inducing signaling responses and also enhances the growth parameter i.e. nitrogen metabolism as a result of considerable lowering in Cr induced damaging effect on nitrogen metabolism and uptake rate, and the alleviating effect was more pronounced with the lower dose of Cr, efficient in N.muscorum than Anabaena.

Removal of Lead by Nanoscale Zerovalent Iron in Surfacewater

InCIEC 2015 ◽  
2016 ◽  
pp. 63-71 ◽  
Author(s):  
Raja Hafizzuddin Raja Amir Iskandar ◽  
Jalina Kassim ◽  
Mohd Fozi Ali ◽  
Amnorzahira Amir
Keyword(s):  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron
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