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Dive into the research topics where Montaser Y. Ghaly is active.

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Featured researches published by Montaser Y. Ghaly.


Waste Management | 2001

Photochemical oxidation of p-chlorophenol by UV/H2O2 and photo-Fenton process. A comparative study.

Montaser Y. Ghaly; Georg Härtel; Roland Mayer; Roland Haseneder

In this study, photochemical advanced oxidation processes (AOPs) utilizing the combinations of UV/H2O2 and the photo-Fenton reaction (UV + classical Fenton reaction) were investigated in lab-scale experiments for the degradation of p-chlorophenol. The study showed that the photo-Fenton process, (a mixture of hydrogen peroxide and ferrous or ferric ion), was the most effective treatment process under acidic conditions and produced a higher rate of degradation of p-chlorophenol at a very short radiation time. It accelerated the oxidation rate by 5-9 times the rate for the UV/H2O2 process. The reaction was found to follow the first order, the reaction was influenced by the pH, the input concentration of H2O2 and the amount of the iron catalyst and the type of iron salt. The experimental results showed that the optimum conditions were obtained at a pH value of 3, with 0.03 mol/l H2O2, and 1 mmol/l Fe(II) for the UV/H2O2/Fe(II) system and 0.01 mol/l H2O2 and, 0.4 mmol/l Fe(III) for the UV/H2O2/Fe(III) system. The reactions were accompanied by the generation of Cl- which reached its maximum value at a short reaction time when using the photo-Fenton process. Finally a rough comparison of the specific energy consumption shows that photo-Fenton process reduced the energy consumption by at least 73 to 83% compared with the UV/H2O2 process.


Journal of Hazardous Materials | 2009

Enhancement of olive mill wastewater biodegradation by homogeneous and heterogeneous photocatalytic oxidation

Mohamed I. Badawy; F.El. Gohary; Montaser Y. Ghaly; Mohamed E.M. Ali

Olive mills wastewater (OMW) is characterized by its high organic content and refractory compounds. In this study, an advanced technology for the treatment of the recalcitrant contaminants of OMW has been investigated. The technique used was either photo-Fenton as homogeneous photocatalytic oxidation or UV/semi-conductor catalyst (such as TiO(2), ZrO(2) and FAZA) as heterogeneous photocatalytic oxidation for treatment of OMW. For both the processes, the effect of irradiation time, amounts of photocatalysts and semi-conductors, and initial concentration of hydrogen peroxide has been studied. At the optimum conditions, photo-Fenton process achieved COD, TOC, lignin (total phenolic compounds) and total suspended solids (TSSs) removal values of 87%, 84%, 97.44% and 98.31%, respectively. The corresponding values for UV/TiO(2) were 68.8%, 67.3%, 40.19% and 48.9%, respectively, after 80 min irradiation time. The biodegradability expressed by BOD(5)/COD ratio for treated wastewater was ranged from 0.66 to 0.8 compared to 0.19 for raw wastewater indicating enhancement of biodegradation.


Desalination and Water Treatment | 2012

Photocatalytic degradation of azo dye Reactive Red 15 over synthesized titanium and zinc oxides photocatalysts: a comparative study

Ibrahim A. Khattab; Montaser Y. Ghaly; Lars Österlund; Mohamed E.M. Ali; Joseph Y. Farah; Fatama M. Zaher; Mohamed I. Badawy

Abstract Nanoparticle TiO2 and ZnO were prepared by facile method. The XRD patt ern study shows that there is no obvious diff erence in crystal composition of various shapes of TiO2 and ZnO. The photocatalytic degradation of Reactive Red 15, commonly used as a textile dye, using synthesized titanium and zinc oxides was investigated. The effects of influential parameters such as initial pH, catalyst loading, initial dye concentration and addition of hydrogen peroxide were studied. The degradation efficiency was expressed by the removal of color and chemical oxygen demand (COD). The study reveals that: (1) Both catalysts, under corresponding optimal conditions, can be employed as an effective photocatalyst for the elimination of color and COD from dye wastewater. Also, ZnO is more efficient catalyst than TiO2; (2) Addition of proper amount of hydrogen peroxide improves both the decolorization and the degradation of the dye; (3) The photocatalytic degradation of Reactive Red 15, in the presence of both photo...


Ozone-science & Engineering | 2001

Aromatic Compounds Degradation In Water By Using Ozone And AOPs. A Comparative Study. O-Nitrotoluene As A Model Substrate

Montaser Y. Ghaly; Georg Harte; Roland Mayer; Roland Haseneder

Abstract O-Nitrotoluene lpar;C7H7NO2) was used as a model compound to study the oxidation of aromatic volatile organic chemicals. Bench-scale studies were conducted to assess the efficiency of ozonation (O3) and advanced oxidation processes (AOPs) such as O3/UV, O3/H2O2, UV/H2O2, and O3/UV/H2O2 for the treatment of o-Nitrotoluene as one of die benzene derivatives. Results of this study indicated that the direct reaction between o-Nitrotoluene and ozone resulted in a slow oxidation rate of o-Nitrotoluene and was pseudo first order. At higher pH, or by the combination of ozone with UV or H2O2 ozonation resulted in more efficient and faster oxidation rates of o-Nitrotoluene due to the participation of hydroxyl radicals in the oxidation of o-Nitrotoluene. Consistent results were observed for O3/UV and UV/H2O2 treatment. The reaction kinetics and mass transfer were also studied.


Separation Science and Technology | 2018

Photoassisted mineralization of remazole red F3B over NiO/TiO2 and CdO/TiO2 nanoparticles under simulated sunlight

Mohamed E.M. Ali; Adnan Alhathal Alanezi; Fadhel Abbas Azeez; Montaser Y. Ghaly

ABSTRACT In this work, a series of titania-supported NiO and CdO materials were synthesized by a modified sol-gel process. The prepared photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), and transmission electron microscopy (TEM). The activities of titania-supported NiO and CdO photocatalysts for photocatalytic degradation of Remazole Red F3B (RR) dye, under simulated sunlight, were investigated. The photocatalytic mineralization of an RR dye solution over various NiO-x/TiO2 and CdO-x/TiO2 photocatalysts under simulated sunlight was investigated. It was worthy noticing that the photocatalytic activity of titania improved using the prepared catalysts. The prepared TiO2, NiO-5/TiO2, and CdO-2/TiO2 photocatalysts exhibited higher photocatalytic activity under simulated sunlight than did commercial TiO2. The prepared photocatalysts were stable after photocatalytic degradation of the dye. The observed photocatalytic mineralization of the dye was 51 and 71% over NiO-10/TiO2 and CdO-2/TiO2 after 180 min of irradiation, respectively. Juxtaposing a p-NiO-5/TiO2 semiconductor provided a potential approach for decreasing charge recombination. The prepared photocatalystsNiO-5/TiO2 and CdO-2/TiO2 are promising composites for the solar detoxification of textile wastewater.


Desalination and Water Treatment | 2015

Solar photoradiation-induced oxidation of NOM from surface water using immobilized coated glass spirals of TiO2

Montaser Y. Ghaly; Mohammed Noor N. Al-Maghrabi; Ebrahim Ismail; Mohamed E.M. Ali

AbstractThe Advanced oxidation processes sunlight/photocatalyst is common for remediation treatments. During the oxidation processes, organic matter decomposed into smaller compounds, which affect the characteristics of the treated effluent. In the present work, two types of commercial TiO2 (TiO2 P-25 Degussa and commercial TiO2 (A)) were supported on small glass spirals. The photooxidation of natural organic matters (NOMs) over immobilized TiO2 using parabolic solar collector was investigated. The effects of addition of H2O2 as electron acceptor and pH values were also investigated. The degradation of NOMs was followed up by analysis of total organic carbon (TOC) and UV absorbance at 254 nm (A254). It was found that NOMs were completely removed over immobilized TiO2 on glass spirals under sunlight irradiation after 120 min. Also, approximately 77% of TOC was reduced from groundwater. Upon obtained results, solar energy could be used for photocatalytic degradation of NOMs in ground and surface waters and ...


Separation and Purification Technology | 2012

Enhancement of TiO2 behavior on photocatalytic oxidation of MO dye using TiO2/AC under visible irradiation and sunlight radiation

Tarek S. Jamil; Montaser Y. Ghaly; Nady A. Fathy; Tarek A. Abd el-halim; Lars Österlund


Desalination | 2007

Enhancement of decolorization rate and COD removal from dyes containing wastewater by the addition of hydrogen peroxide under solar photocatalytic oxidation

Montaser Y. Ghaly; Joseph Y. Farah; Amany M. Fathy


Desalination | 2011

Photocatalytic hydrogen production over nanostructured mesoporous titania from olive mill wastewater

Mohamed I. Badawy; Montaser Y. Ghaly; Mohamed E.M. Ali


Desalination | 2007

Techno economic evaluation for the treatment of pesticide industry effluents using membrane schemes

H.F. Shaalan; Montaser Y. Ghaly; Joseph Y. Farah

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Roland Haseneder

Freiberg University of Mining and Technology

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Georg Härtel

Freiberg University of Mining and Technology

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Roland Mayer

Freiberg University of Mining and Technology

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Amany M. Fathy

United States Department of Energy

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Georg Harte

Freiberg University of Mining and Technology

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M.F. Zawrah

University of Connecticut

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