Harez Rashid Ahmed

ORCID: 0000-0003-0792-5295
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About
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Research Areas
  • Adsorption and biosorption for pollutant removal
  • Nanomaterials for catalytic reactions
  • Carbon and Quantum Dots Applications
  • Metal-Organic Frameworks: Synthesis and Applications
  • Clay minerals and soil interactions
  • Catalytic Processes in Materials Science
  • Advanced oxidation water treatment
  • Iron oxide chemistry and applications
  • Catalysis and Hydrodesulfurization Studies
  • Advanced biosensing and bioanalysis techniques
  • Covalent Organic Framework Applications
  • Nanoparticles: synthesis and applications
  • Electrodeposition and Electroless Coatings
  • Coagulation and Flocculation Studies
  • Minerals Flotation and Separation Techniques
  • Advanced Nanomaterials in Catalysis
  • Polymer Surface Interaction Studies
  • Advanced Photocatalysis Techniques
  • Nanocluster Synthesis and Applications
  • Nanoporous metals and alloys
  • Epoxy Resin Curing Processes
  • Sulfur Compounds in Biology
  • Anodic Oxide Films and Nanostructures
  • Graphene and Nanomaterials Applications
  • Advancements in Photolithography Techniques

University of Sulaimani
2017-2025

Komar University of Science and Technology
2023-2024

University of Cambridge
1996-2004

North Dakota State University
1984-1986

The global textile industry poses significant challenges to public health, safety, and environmental sustainability through its discharge of wastewater.

10.1039/d4nj00791c article EN New Journal of Chemistry 2024-01-01

The excessive use of organic pollutants like dyes, which enter the water environment, has led to a significant environmental problem. Finding an efficient method degrade these is urgent due their detrimental effects on aquatic organisms and human health. Carbon-based catalysts are emerging as highly promising alternatives metal in Fenton-like systems. They serve persulfate activators, effectively eliminating recalcitrant from wastewater. In this study, iron-loaded carbon black (Fe-CB) was...

10.1039/d3ra04566h article EN cc-by RSC Advances 2023-01-01

The Ziehl-Neelsen stain is a mixture of Basic Fuchsin (BF), phenol (Ph), and methylene blue. It used to the cell walls Mycobacterium species. In this study, was efficiently removed from synthetic wastewater using natural clay Gankawa (GC) Sulaimanyah city, effect presence high concentrations in adsorption demonstrated. addition, X-ray diffraction (XRD), fluorescence (XRF), N 2 gas analyzer, field-emission scanning electron microscopy (FESEM) were characterize clay. found be mostly calcite,...

10.1155/2023/4672622 article EN cc-by-nc Adsorption Science & Technology 2023-01-01

Abstract This study presents a comparative kinetic analysis of biomass and biochar as green adsorbents for removing Pb 2+ from aqueous solutions. The adsorption efficiency (99% removal in 20 minutes) was markedly higher than that (72% 30 minutes), attributed to an increase surface area 6.994 m 2 /g (biomass) 8.664 (biochar) the transition amorphous crystalline structure, confirmed by X‐ray diffraction (XRD) analysis. Elemental composition morphology were characterized using EDX mapping SEM...

10.1002/ep.14650 article EN Environmental Progress & Sustainable Energy 2025-05-29

Isothermal electron beam heating combined with in situ optical measurements has been used to measure the temperature dependence of spectral emissivity lightly doped silicon range 345–723 °C for wavelengths between 1 and 9 μm. The absorption coefficient was deduced from compared predictions a model including phonon-assisted processes involved interband transitions, free-carrier absorption, lattice absorption. experimental data agree well model’s results.

10.1063/1.117161 article EN Applied Physics Letters 1996-10-07

Clay sample of Qulapalk – Sulaimani Kurdistan region Iraq was analyzed for its chemical composition and mineralogy. Calcite (a non-clay mineral) a major constituent the (34%). The main clay mineral smectite as depicted by X-ray diffraction patterns oriented slides. Adsorption Leishman stain from aqueous solution onto natural studied in batch system. effect operational conditions like initial pH, adsorbent dose, contact time temperature were studied. pseudo second order kinetic model fitted...

10.1016/j.kijoms.2017.05.002 article EN Karbala International Journal of Modern Science 2017-05-24

The dependence of roughness poly(methylmethacrylate) resist features on developer composition and development time, using methyl isobutyl ketone:propanol (MIBK:IPA) with without ultrasonic assistance, is investigated atomic force microscopy. It found that the decreases increasing proportion MIBK in for a weak (1:4 MIBK:IPA at 25 °C), increases time. Ultrasonically assisted also to reduce when developer, but has no significant effect strong (1:1 MIBK:IPA), or 3:7 water:IPA. We propose origin...

10.1116/1.1651106 article EN Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena 2004-03-01
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