Electrodeposition of Manganese Dioxide under Different Conditions: Application of MnO2/Carbon Fibers in the Electrosorption Process

Zainab M. Issa; Rasha H. Salman

doi:10.1002/ceat.202300294

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Publication Date

Tue Oct 24 2023

Journal Name

Chemical Engineering & Technology

Volume

46

DOI

10.1002/ceat.202300294

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Electrodeposition of Manganese Dioxide under Different Conditions: Application of MnO2/Carbon Fibers in the Electrosorption Process

Carbon fiber

Chromium(VI)

Electrodeposition

Electrosorption

Manganese dioxide

Zainab M. Issa

Rasha H. Salman

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AbstractAnodic electrodeposition was used to synthesize a composite electrode of nanostructured manganese dioxide/carbon fiber (CF) galvanostatically. Different characterization results of the nanostructured MnO2 were obtained by varying the H2SO4 concentration and the current density. Field emission scanning electron microscopy, X‐ray diffraction, and atomic force microscopy were utilized to characterize the prepared composite electrodes. The best conditions were: 0.3 mA cm−2 current density and 0.64 M H2SO4 concentration. The electrosorption performance of the MnO2/CF electrode prepared under the best conditions was tested by way of its chromium(VI) ion adsorption from a simulated solution. The applied voltage, pH, and ionic strength affect the efficiency of Cr(VI) ion removal. The highest chromium removal efficiency was 99.98 %, achieved at pH 2, a cell voltage of 4.6 V, and a NaCl concentration of 1 g L−1.

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Publication Date

Fri Mar 30 2007

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Corrosion Inhibition of Low Carbon Steel in Different HCl Concentrations by Phenythiourea

phenythiourea low carbon steel corrosion inhibition

Aprael

Nashwan

Ahmed

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Phenylthiourea (PHTU),was tested as inhibitor for the corrosion of low carbon steel in different HCI acid concentration by mass loss ,and polarization measurements .it was found that (PHTU) is a good inhibitor for the corrosion of low carbon steel in 1,3,and 5N HCI solution ,and its inhibition efficiency (0) increases with its concentration and attains approximately 97% at l g/I .polarization curves indicate that (PHTU) acts as an anodic type inhibitor .the inhibitor was adsorbed on the low carbon steel surface according to the Langmuir adsorption isotherm model. Results show that the rate of corrosion of low carbon steel increased with increasing temperature o

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Publication Date

Sat Oct 29 2022

Journal Name

International Ophthalmology

Comparison of corneal flap thickness predictability and architecture between femtosecond laser and sub-Bowman keratomileusis microkeratome in laser in situ keratomileusis

Rattan S.A.

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Publication Date

Wed Feb 22 2023

Journal Name

Iraqi Journal Of Science

The Adsorption of Some Trace Heavy Metals from Aqueous Solution Using Non Living Biomass of Sub Merged Aquatic Plant Ceratophyllum demersum

Heavy metals

Ceratophyllum demersum

Adsorption

Hassanein

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Heavy metals contamination in aquatic ecosystems is considered one of the most important threats of aquatic life. Submerge aquatic plants Ceratophyllum demersum in its non living form used for the removal of trace elements. This article studied the ability of the fine powder of C.demersum for the removal of some heavy metals (HM) like copper, cadmium, lead and chrome from aqueous solution with in variable experimental factors. The study occupy two treatments the first included different hydrogen ions pH within a range of 4, 5,6and 8 with a constant HM concentration (1000 ppm).While the second treatment represented by using variable HM concentrations within a range of (250,500,750and 1000 ppm) with a constant pH=7.In both treatments the a

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Publication Date

Sat Apr 27 2024

Journal Name

Journal Of Applied Polymer Science

Synthesis of carboxymethyl cellulose from coconut fibers and its application as solid polymer electrolyte membranes

Aseel

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AbstractCarboxymethyl cellulose (CMC) is one of the important cellulose derivatives, and it can be developed as a host polymer for solid polymer electrolyte (SPE) membrane. This study aimed to synthesis of CMC from coconut fiber cellulose and it was applied to prepare the SPE membranes. Cellulose isolation was conducted through the delignification and bleaching process, while the CMC synthesis was conducted through alkalization and carboxymethylation treatments. SPE membranes were prepared by blending CMC with carboxymethyl chitosan (CMCh) (80/20) and mixed with various weight percentages of LiOAc at room temperature. SPE membranes characterizations were conducted using FTIR, EIS, XRD, SEM, and tensile testi ... Show More

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Publication Date

Tue Aug 08 2023

Journal Name

Pharmaceutical Sciences Asia

Sub-inhibitory doses of Ofloxacin reduce adhesion and biofilm formation of Pseudomonas aeruginosa to biotic and abiotic surfaces

Lubna Ali Abd

Ayaid Khadem

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Publication Date

Tue Feb 28 2023

Journal Name

Heliyon

Impacts of hydrogeochemical processes and land use practices on groundwater quality of Shwan sub-Basin, Kirkuk, northern Iraq

د. هند فاضل

Balsam Salim

Omer Sabah

Christoph

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Publication Date

Tue Mar 20 2018

Journal Name

Offshore Technology Conference Asia

Prediction of Hydrate Phase Equilibrium Conditions for Different Gas Mixtures

new correlation

hydrate equilibrium temperature

correlation

prediction

gas mixture

hammerschmidt

phase equilibria

artificial intelligence

upstream oil & gas

hydrate

Dhifaf Jaafar

Stefan

Maxim

Ahmed

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AbstractGas hydrate formation poses a significant threat to the production, processing, and transportation of natural gas. Accurate predictions of gas hydrate equilibrium conditions are essential for designing the gas production systems at safe operating conditions and mitigating the problems caused by hydrates formation. A new hydrate correlation for predicting gas hydrate equilibrium conditions was obtained for different gas mixtures containing methane, nitrogen and carbon dioxide. The new correlation is proposed for a pressure range of 1.7-330 MPa, a temperature range of 273-320 K, and for gas mixtures with specific gravity range of 0.553 to 1. The nonlinear regression technique was applie ... Show More

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Publication Date

Wed Apr 28 2021

Journal Name

2021 1st Babylon International Conference On Information Technology And Science (bicits)

An Efficient Method for Stamps Verification Using Haar Wavelet Sub-bands with Histogram and Moment

Maha A.

Loay E.

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(2)

Publication Date

Wed Sep 30 2020

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Application of Emulsion Liquid Membrane Process for Cationic Dye Extraction

dye extraction

Methylene Blue (MB)

cationic dye

emulsion liquid membrane.

Manal Adnan

Wasan Omar

Huda Adil

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In the present work studies were carried out to extract a cationic dye (Methylene Blue MB) from an aqueous solution using emulsion liquid membrane process (ELM). The organic phase (membrane phase) consists of Span 80 as emulsifier, sulfuric acid solution as stripping agent and hexane as diluent.

In this study, important factors influencing the extraction of methylene blue dye were studied. These factors include H₂SO₄ concentration in the stripping phase, agitation speed in the dye permeation stage, Initial dye concentration and diluent type.

More than (98%) of Methylene blue dye was extracted at the following conditions: H₂SO₄ concentration (1.25) M, agitation

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Publication Date

Tue Oct 01 2024

Journal Name

Journal Of Ecological Engineering

Treatment of Petroleum Refinery Wastewater by Activated Carbon Assisted Electrocoagulation Process

avocado

adsorption

wastewater

COD removal

combined process

response surface methodology.

huda

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The removal of COD from wastewater generated by petroleum refinery has been investigated by adopting electrocoagulation (EC) combined with adsorption using activated carbon (AC) derived from avocado seeds. The process variables influencing COD removal were studied: current density (2–10 mA/cm2), pH (4–9), and AC dosage (0.2–1 g/L). Response surface methodology (RSM) based on Box–Behnken design (BBD) was used to construct a mathematical model of the EC/AC process. Results showed that current density has the major effect on the COD removal with a percent of contribution 32.78% followed by pH while AC dosage has not a remarkable effect due to the good characteristics of AC derived from avocado seeds. Increasing current density gives be

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