Evaluation Of Nano-sorbents for Removal of Ethyl-benzene from Exhaust of Soil Vapor Extraction (SVE)System

, M.Sc. Thesis Sharif University of Technology Jangodaz, Elnaz (Author) ; Sayf Kordi, Ali Akbar (Supervisor) ; Alaiee, Ebrahim (Supervisor) ; Tasharrofi, Saiedeh (Co-Advisor)

Abstract

Volatile organic compounds are major cause of air pollution. In this work, Nano porous material named MIL-101(Fe), MIL-53(Fe), MIL-101(Fe) and MIL-88(Fe) as an adsorbent for the removal of ethyl benzene have been synthesized hydrothermally. The materials were characterized by Fourier-transform infrared (FT-IR) spectroscopy, Surface Analysis Systems (ASAP), and x-ray diffraction (XRD) analysis. Adsorption isotherms of ethyl benzene on the materials were measured experimentally in case of 0-1000ppm concentration of ethyl benzene in air and pressure 1 atmosphere. The mixture of air and VOC (ethyl benzene) with concentration of 100, 250, 500 and 1000 ppm and flow rate of 400, 1030, 1525 and 2025...

Optimization and Modification of the Nanostructures Adsorbent for Reduction voc in Flue Gas (Benzene, Toluene, Xylene, Ethyl Benzene)

, M.Sc. Thesis Sharif University of Technology Azaribeni, Adel (Author) ; Sayf Kordi, Ali Akbar (Supervisor) ; Mahdyarfar, Mohammad (Supervisor) ; Tasharrofi, Saiedeh ($item.subfieldsMap.e)

Abstract

In this study, In order to reduce volatile organic component (benzene, toluene, xylene and ethyl benzene) some appropriate nanostructures were used. First the appropriate nano structures were identified, then modified and optimized and finally characterized by XRD, SEM, ASAP. Appropriate nano adsorbent such as nano active carbon, single wall and multi wall nano carbon tubs , nano fiber carbon, graphene oxide, aluminum oxide particles, nano-zinc oxide , titanium oxide particles, 13x zeolite and extruded nano carbon tubes, were prepared and optimized, than evaluated from perspective of the crystal structure, surface area and porosity. nano active carbon, single wall and multi wall nano carbon...

Adsorption of ethylbenzene from air on metal–organic frameworks MIL-101(Cr) and MIL-53(Fe) at room temperature

, Article Journal of Inorganic and Organometallic Polymers and Materials ; Volume 28, Issue 5 , 2018 , Pages 2090-2099 ; 15741443 (ISSN) Jangodaz, E ; Alaie, E ; Safekordi, A. A ; Tasharrofi, S ; Sharif University of Technology

2018

Abstract

Volatile organic compounds are a major cause of air pollution; therefore, VOCs are a serious fulmination for the environment. According to studies, adsorption processes have a high performance for the removal of pollutants that by selecting the proper absorbent, efficiency will be improved. In this work performance of two metal organic frameworks are studied so porous materials named MIL-101(Cr) and MIL-53(Fe) as an adsorbent for the removal of ethylbenzene have been synthesized hydrothermally. The materials were characterized by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, adsorption of ethylbenzene, field emission scanning electron microscopy (FESEM),...

Analysis of rTMS in Improvement of Tinnitus using EEG and fMRI

, M.Sc. Thesis Sharif University of Technology Shariftabar Azizi, Fatemeh (Author) ; Jahed, Mehran (Supervisor) ; Asadpour, Abdureza (Co-Supervisor) ; Hani Tabatabaei, Mozhgan (Co-Supervisor) ; Mehrkian, Saiedeh (Co-Supervisor)

Abstract

Tinnitus means hearing a sound without an external source. Despite the research done in relation to it, it is still an unknown phenomenon and no method has been introduced to treat it. Repetitive transcranial magnetic stimulation is one of the methods that its effectiveness in decreasing tinnitus sound is still under investigation. This technology is a non-invasive method to stimulate the brain, which modulates the activity of neurons by applying successive electromagnetic pulses on the scalp. Most of the studies conducted in this field have used clinical evaluations to investigate the effect of stimulation. Relying on this method alone to evaluate the effect of stimulation cannot take a...