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Phytochemical Screening and Corrosion Inhibition of the Ethanolic Leave Extracts of Gardenia aqualla Stapf & Hutch In 1M H2SO4 Acid Solution
Opara Chinonso Ivan,
Louis Hitler,
Japari Joseph,
Oyebanji Oyetola,
Akakuru Ozioma Udochukwu,
Tonny Nyong’a Maraga,
Pigweh Amos Isa
Issue:
Volume 6, Issue 1, February 2018
Pages:
1-5
Received:
5 October 2017
Accepted:
18 October 2017
Published:
14 December 2017
Abstract: The main objective of this study is to investigate the corrosion inhibition properties of Gardenia aqualla leaf extract on mild steel using weight determination loss method. The corrosion of mild steel was investigated at different concentrations of Gardenia aqualla at temperatures of 303, 313 and 323 K. G. aqualla inhibit corrosion rate of mild steel from 62.4 mm/yr to 6.5 mm/yr, 91.6 mm/yr to 16.6 mm/yr and 113.8 mm/yr to 28.4 mm/yr at 303, 313, and 323 K respectively. The optimum obtained yield in the inhibition efficiency is from 63.8% to 89.5%, 52.5% to 81.9% and 39% to 75% for the various temperatures respectively after an interval of 3 days being in contact in aqueous solution. Langmuir isotherm confirmed that physisorption occurred and it was found that inhibition occurred through adsorption of the constituents present in the leaf of G. aqualla obtained by phytochemical screening.
Abstract: The main objective of this study is to investigate the corrosion inhibition properties of Gardenia aqualla leaf extract on mild steel using weight determination loss method. The corrosion of mild steel was investigated at different concentrations of Gardenia aqualla at temperatures of 303, 313 and 323 K. G. aqualla inhibit corrosion rate of mild st...
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Ammonium Di-Hydrogenocitrate and Mono-Hydrogenocitrate Synthesis by Citric Acid Neutralization with Ammonia Using Ethanol as Co-Solvent for the Crystallization – Swelling Test to Confirm Gases Emissions Capacity
Andry Tahina Rabeharitsara,
Maheriniaina Andriamasinoro Andriamandroso,
Nambinina Richard Randriana,
Rijalalaina Rakotosaona,
Edouard Andrianarison,
André Razafimandefitra,
Baholy Robijaona
Issue:
Volume 6, Issue 1, February 2018
Pages:
6-14
Received:
11 September 2017
Accepted:
25 September 2017
Published:
23 December 2017
Abstract: Citric acid is a α-hydroxylated tricarboxylic acid present in abundance in lemon. More than one million tons of citric acid are industrially produced throughout the year. Our objective in this manuscript was to increase the value of the citric acid to ammonium citric acid salts by crystallization such as ammonium Di-hydrogenocitrate and ammonium mono-hydrogenocitrate. Studies and tests were carried out in this direction but the characteristic of our last process was the use of a co-solvent ethanol which proved more effective and more economical. At the end, we tested the capacity of the ammonium Di-hydrogenocitrate and the ammonium mono-hydrogenocitrate to swell a mixture and compared theirs capacities to the sodium bicarbonate. Results showed an excellent swelling capacity of the ammonium Di-hydrogenocitrate and ammonium mono-hydrogenocitrate to produce a uniformly very not much porous product’s texture.
Abstract: Citric acid is a α-hydroxylated tricarboxylic acid present in abundance in lemon. More than one million tons of citric acid are industrially produced throughout the year. Our objective in this manuscript was to increase the value of the citric acid to ammonium citric acid salts by crystallization such as ammonium Di-hydrogenocitrate and ammonium mo...
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Comparative Studies on Reduction of Sulphur Content of Heavy Crude Oil Using KMnO4+H2O2/CH3COOH and KMnO4+H2O2/HCOOH Via Oxidative Desulphurization (ODS)
Sayudi Yahaya Haruna,
Umar Zaki Faruq,
Aminu Yakubu Zubairu,
Muhammad Gidado Liman,
Maryam Lami Riskuwa
Issue:
Volume 6, Issue 1, February 2018
Pages:
15-24
Received:
10 December 2017
Accepted:
28 December 2017
Published:
17 January 2018
Abstract: Increase by agency protocols, international organisation regulations, and government regulations in many countries, demand for uncontaminated fuel and the use of more environmentally friendly transportation fuels with minor contents of sulphur compound (SOx) and aromatics compound lead to the search of pre-sulphur. In the present time, the demand for transportation fuels has been increasing in many countries for the past two decades. The study reported the compared oxidation-extraction desulphurization of heavy crude oil using combined oxidants potassium permanganate and hydrogen peroxide (KMnO4+H2O2) over acetic acid (CH3COOH) and Formic acid (HCOOH) catalysis. The following results were obtained; formic acid (HCOOH) with higher sulphur reduction by (73.00%), while acetic acid (CH3COOH) with lower sulphur reduction by (27.02%). The study concluded that combined oxidants (KMnO4+H2O2) with formic acid (HCOOH) catalysed reaction system is better than using combined oxidants (KMnO4+H2O2) with acetic CH3COOH catalyst. Moreover DMSO was found to be a pathetic and inadequate solvent for extraction of oxidized sulphur since, it present more sulphur into the oxidised oil higher than that up fresh sample.
Abstract: Increase by agency protocols, international organisation regulations, and government regulations in many countries, demand for uncontaminated fuel and the use of more environmentally friendly transportation fuels with minor contents of sulphur compound (SOx) and aromatics compound lead to the search of pre-sulphur. In the present time, the demand f...
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Heavy Metals Adsorption from Aqueous Solutions onto Unmodified and Modified Jordanian Kaolinite Clay: Batch and Column Techniques
Khansaa Al-Essa,
Fawwaz Khalili
Issue:
Volume 6, Issue 1, February 2018
Pages:
25-34
Received:
16 December 2017
Accepted:
6 January 2018
Published:
18 January 2018
Abstract: Awareness of, and concern about, water pollution all over the world has been increasing. In Jordan, water also has been polluted by different kinds of pollutants such as heavy metals, It is widely agreed that a properly developed green, low – cost and more efficient adsorbent is desired approach towards removing pollutants. Jordan has huge reserves of kaolinite. Unfortunately, it has a relative low cation–exchange capacity and a small surface area. However, it can be modified to enhance its adsorption capacity towards heavy metal ions. Humic acid was used to this purpose. Two types of humic acid were used; one was commercial from Fluka Company and the other was natural extracted from King Talal Dam sediments. Comparison of Pb (II), Cd (II) and Zn (II) adsorption from aqueous solutions onto unmodified and modified Jordanian kaolinite clay were studied using batch technique at different temperatures (25, 35 and 45°C) and different pH (4, 5 and 6). The effects of contact time, adsorbent dose, and the initial metal ion concentration were also studied. The uptake at low concentration reaches above 90% for Pb (II). The adsorbed amount trend was as follows: Pb (II) > Cd (II) > Zn (II) for both modified kaolinite clay. The column technique was used effectively for the determination of metal ion loading capacity. The uptake percentage fall in the same order (Pb (II) > Cd (II) > Zn (II)) for both modified kaolinite clay.
Abstract: Awareness of, and concern about, water pollution all over the world has been increasing. In Jordan, water also has been polluted by different kinds of pollutants such as heavy metals, It is widely agreed that a properly developed green, low – cost and more efficient adsorbent is desired approach towards removing pollutants. Jordan has huge reserves...
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Screening of Termiticidal Activities Different Extracts of Stem Bark of Prunus africana against Macrotermes spp.
Issue:
Volume 6, Issue 1, February 2018
Pages:
35-38
Received:
18 December 2017
Accepted:
10 January 2018
Published:
26 January 2018
Abstract: Prunus africana is renowned for its durability which can be attributable to the presence of wood extractives that are poisonous to degrading organisms such termites and fungi. The present study was thus undertaken to examine the potential termiticidal activity of different extracts of stem bark of Prunus africana against Macrotermes spp. The bark was extracted using different solvents (petroleum ether, diethyl ether and chloroform) and each extract was tested at seven different concentrations (0.156, 0.313, 0.625, 1.250, 2.500, 5.00 and 10.00 mg/mL). The results revealed that the diethyl ether extract is potent termiticide against the termites with lethal concentration of 0.22mg/mL within 5 minutes.
Abstract: Prunus africana is renowned for its durability which can be attributable to the presence of wood extractives that are poisonous to degrading organisms such termites and fungi. The present study was thus undertaken to examine the potential termiticidal activity of different extracts of stem bark of Prunus africana against Macrotermes spp. The bark w...
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