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nano-fe
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Nitrate reduction by nano-Fe/Cu particles in packed column
, Article Desalination ; Volume 276, Issue 1-3 , 2011 , Pages 214-221 ; 00119164 (ISSN) ; Ataie Ashtiani, B ; Kholghi, M ; Sharif University of Technology
Abstract
In this work the application of a modified surface nano zero valent iron (NZVI) as bimetallic Fe/Cu particles to remove high concentration of NO3--N through packed sand column has been studied. Dispersed nano-Fe/Cu particles has been synthesized in water mixed ethanol solvent system (1:4v/v) and described by XRD pattern, TEM and SEM images and BET analyze. Batch experiments have been conducted to investigate the effect of percentage coating of Fe0 by Cu on the nitrate removal. Research on packed sand column (120cm length, 6.5cm inner diameter) has been done under conditions of Nano-Fe/Cu concentration (2, 5, and 8gl-1 of solution), high initial NO3--N concentration (100, 200, and 300mgl-1)...
Catalytic graphitization behavior of phenolic resins by addition of in situ formed nano-Fe particles
, Article Physica E: Low-Dimensional Systems and Nanostructures ; Volume 101 , 2018 , Pages 50-61 ; 13869477 (ISSN) ; Bavand Vandchali, M ; Nemati, A ; Golestani Fard, F ; Sharif University of Technology
Elsevier B.V
2018
Abstract
This work presents the catalytic graphitization process of phenolic resins (PR's) by addition of in situ nano-Fe particles as catalyst. Pyrolysis treatments of prepared compositions including various contents of nano-Fe particles were carried out at 600–1200 °C for 3 h under reducing atmosphere and graphitization process were evaluated by different techniques such as X-Ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), Simultaneous Thermal Analysis (STA) and Raman spectroscopy that mainly performed to identify the phase and microstructural analysis, oxidation resistance and extend of graphitized carbon...
Bench-scaled nano-Fe 0 permeable reactive barrier for nitrate removal
, Article Ground Water Monitoring and Remediation ; Volume 31, Issue 4 , 2011 , Pages 82-94 ; 10693629 (ISSN) ; Ataie Ashtiani, B ; Kholghi, M ; Sharif University of Technology
Abstract
There are many fundamental problems with the injection of nano-zero-valent iron (NZVI) particles to create permeable reactive barrier (PRB) treatment zone. Among them the loss of medium porosity or pore blocking over time can be considered which leads to reduction of permeability and bypass of the flow and contaminant plume up-gradient of the PRB. Present study provides a solution for such problems by confining the target zone for injection to the gate in a funnel-and-gate configuration. A laboratory-scale experimental setup is used in this work. In the designed PRB gate, no additional material from porous media exists. NZVI (d 50 = 52 ± 5 nm) particles are synthesized in water mixed with...