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Featured researches published by H. Kadhum.


International Journal of Physical Sciences | 2012

Toxicity evaluation for low concentration of chlorophenols under solar radiation using zinc oxide (ZnO) nanoparticles

Muneer M. Ba-Abbad; Abdul Amir; H. Kadhum; Ahmed A. Al-Amiery; Mohd Sobri Takriff

Photo catalytic degradation of chlorophenols in aqueous solution by ZnO nanoparticles under sunlight was investigated. The toxicity of chlorophenols was evaluated by agar plates technique with paper discs in the presence of Escherichia coli. The relative toxicity data of chlorophenols, before and after degradation, was used in comparing between them. The degree of toxicity was estimated by clear zone around each paper disc of chlorophenols. Results show toxicity of chlorophenols as PCP>TeCP>2,4,6TCP>2,4-DCP>2-CP before photocatalytic degradation. After degradation, no more toxicity was observed by clear zone around each paper disc. The toxicity test indicates that higher degradation of chlorophenols occurred by ZnO nanoparticles under sunlight as alternative method for treatment.


International Journal of Bioscience, Biochemistry and Bioinformatics | 2013

New Photocatalyst LiNbO 3 for Corrosion Reducing and Environment Friendly Sustainable Concrete Construction

Ranjit K. Nath; M.F.M. Zain; Abdul Amir; H. Kadhum

By the carbonation process concrete construction absorbs carbon dioxide from surrounding environment. This absorbed carbon dioxide reacts with the calcium oxide, which is already present in Reinforced concrete (RC) and form calcium carbonate an acidic compound that enhances corrosion on the surface of the reinforcement. Addition of photo catalytic materials to the RC structure during its construction phase could reduce the corrosion problem of RC materials. This material hinders calcium oxide to form acidic compound and creates a complex compound. In combination with light, this complex compound is oxidized, and residual compound will exist in or surface of RC material. In this study we find out a new photo catalytic material LiNbO3 in concrete construction, adjustable with RC material for reducing corrosion problem and enhancing oxidization process of volatile organic compounds (VOC).


International Journal of Physical Sciences | 2012

The reduction of perchlorate anions in tap water using a fluidized bed bioreactor

Bilal A. Wasmi; Abdul Amir; H. Kadhum; Ahmed A. Al-Amiery; Abu Bakar Mohamad

The compounds that mainly interfere with perchlorate reduction in contaminated tap water, nitrate and dissolved oxygen (DO), were reduced using a fluidized bed bioreactor. Nitrate was reduced to below the maximum level of contamination adopted by the United States Environmental Protection Agency (EPA), 10 ppm, and the percentages of nitrate were 90, 84 and 80% for concentrations (conc.) of 25, 50 and 100 ppm perchlorate, respectively, after a 6 h hydraulic retention time (HRT). The DO concentration was reduced to less than 1 mg/L, which is considered to be appropriate for the maximum rates of perchlorate anion reduction, and the percentages of DO removed were 80, 83, and 88% for 25, 50, and 100 ppm perchlorate, respectively, after a 6 h HRT. The maximum reduction for perchlorate was obtained with an HRT of 6 h for the different concentrations of perchlorate anion contamination. This result was confirmed by increase in the concentration of free chloride and decrease in the pH values for UP water. The free chloride concentrations increased to 36, 47 and 58 ppm for the 25, 50 and 100 ppm perchlorate concentration, respectively, after the 6 h HRT. The pH values decreased to 6.01, 5.8 and 6.2 for the 25, 50 and 100 ppm perchlorate concentration, respectively, after the 6 h HRT.


International Journal of Electrochemical Science | 2011

Galvanic Corrosion of Aluminum Alloy (Al2024) and Copper in 1.0 M Nitric Acid

Ahmed Y. Musa; Abu Bakar Mohamad; Abdul Amir; H. Kadhum; Eng Pei Chee


International Journal of Electrochemical Science | 2012

Thermodynamic studies on 4-aminocoumarin tautomers

Ahmed A. Al-Amiery; Huda Dhia Jaffar; Hasan R. Obayes; Ahmed Y. Musa; Abdul Amir; H. Kadhum; Abu Bakar Mohamad


Archive | 2013

CFD Simulation of Heat Transfer Augmentation in Constant Heat-Fluxed Tube fitted with Baffled Twisted Tape Inserts

Sami Salman; Abdul Amir; H. Kadhum; Mohd Sobri Takriff; Abu BakarMohamad


International Journal of Physical Sciences | 2012

Co-crystal structure of mixed molecules

Abdul Amir; H. Kadhum; Ahmed A. Al-Amiery; Hamdan A. Aday; Yasamin K. Al-Majedy; Redah I. Al-Bayati; Abu Bakar Mohamad


Asian Journal of Microbiology, Biotechnology and Environmental Sciences | 2013

THE EFFECTS OF TEMPERATURE, pH AND CARBON SOURCES ON ANTIMICROBIAL PEPTIDE AN5-1 PRODUCTION USING PAENIBACILLUS ALVEI AN 5

Bassam Alkotaini; Nurina Anuar; Abdul Amir; H. Kadhum


Archive | 2016

SYNTHESIS AND CHARACTERISATION OF CHITOSAN-CELLULOSE BIOCOMPOSITE MEMBRANE FOR FUEL CELL APPLICATIONS (Sintesis dan Pencirian Membran Biokomposit Kitosan-Selulosa untuk Aplikasi Sel Bahan Api)

Kee Shyuan Loh; Abu Bakar Mohamad; Abdul Amir; H. Kadhum; Kean Long Lim


Archive | 2015

Heat Transfer Enhancement of Laminar Flow in a Circular Tube Using Swirl/Vortex Generator (Peningkatan Pemindahan Haba Aliran Lamina di dalam Tabung Membulat Menggunakan Penjana Swirl/Vorteks)

Sami Salman; Abdul Amir; H. Kadhum; Mohd Sobri Takriff; Abu Bakar Mohamad

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Abu Bakar Mohamad

National University of Malaysia

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Mohd Sobri Takriff

National University of Malaysia

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Ahmed Y. Musa

University of Western Ontario

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Bassam Alkotaini

National University of Malaysia

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Bilal A. Wasmi

National University of Malaysia

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Eng Pei Chee

National University of Malaysia

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Kee Shyuan Loh

National University of Malaysia

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M.F.M. Zain

National University of Malaysia

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Muneer M. Ba-Abbad

National University of Malaysia

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