Journal of applied science and environmental management, Feb 10, 2022
Elimination of dyes in contaminated water or wastewater has become a universal challenge because ... more Elimination of dyes in contaminated water or wastewater has become a universal challenge because of their colouration, toxicity, mutagenicity and carcinogenicity when discharged into the recipient environment without treatment and several technologies have been developed to deal with this problem. This paper reports the potential of exploring the use and comparison of conventional iron zero-valent (nZVI) nanoparticle and Irvingia gabonensis stabilized iron nanocomposite (Ig-nZVI) for the elimination of methyl red (MR) and methyl orange (MO) dyes in aqueous solution under effect of different experimental conditions of adsorbent dosage, initial dye concentrations, pH, contact time and temperature. Data obtained show an increase in percent dye elimination as the amount of adsorbent increased. The optimal removal of MR and MO occurred in ˂ 60 min of the start of each experimentation, obtained at a maximum pH of 5.1 at 98.5% and 80.6% for adsorbent dosage of 0.3g/50 mL and 20 mg/L initial dye concentration at temperature of 27 o C. The experimental data fitted the Lamgmuir isotherm with maximum adsorption capacity (qmax) of 166.7mg/g (Ig-nZVI) and 83.35 mg/g (nZVI) for MR while 128.21 mg/g (Ig-nZVI) and 40.02.5 mg/g (nZVI) were obtained for MO. Kinetics studies showed that the removal of MR and MO fitted the pseudo second-order model. The adsorption of MR and MO were endothermic and spontaneous with enthalpy values of 3.39kJ/mol (Ig-nZVI) and 776.26kJ/mol (nZVI) and standard Gibbs free energy values of-5.95kJ/mol (Ig-nZVI) and-12.00kJ/mol (nZVI). Thermodynamic studies (ΔG < 0, ΔH < 0, ΔS > 0) implied a spontaneous and exothermic process in nature. The adsorption of MO was endothermic and spontaneous with enthalpy values of 31.70kJ/mol (Ig-nZVI) and 20.91kJ/mol (nZVI) and standard Gibbs free energy values of-5.92kJ/mol and-7.07kJ/mol for Ig-nZVI and nZVI respectively. Adsorbent produced from leaf extracts of African mango tree (Irvingia gabonensis) and stabilized by iron oxide could be an attractive option for elimination of dye from industrial effluents.
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Reactions of Cyclic Anhydrides with Aromatic Primary Amines. Part 3. Synthesis of Novel 3-(N-Aryl... more Reactions of Cyclic Anhydrides with Aromatic Primary Amines. Part 3. Synthesis of Novel 3-(N-Arylcarbamoyl)-and 3-(N-Naphthylcarbamoyl)carboxylic Acids.-A variety of hitherto unreported 3-(N-arylcarbamoyl)propenoic acids (III) and related propanoic acid analogues (V) are synthesized as potential pesticides.-(OMUARU, V. O. T.;
Zero-valent iron nano-particle (nZVI) was modified with Spondias mombin (Sm) leaves extract (Sm-n... more Zero-valent iron nano-particle (nZVI) was modified with Spondias mombin (Sm) leaves extract (Sm-nZVI) for the removal of total petroleum hydrocarbons (TPH), total hydrocarbon content (THC), and polycyclic aromatic hydrocarbons (PAHs) from contaminated soil. Advanced analytical tools such as Fourier Transform Infra-Red (FT-IR) Spectrophotometer, Scanning Electron Microscope(SEM) and X-ray diffractometer (XRD) were used to characterize the biosynthesized zero-valent iron nano-sorbent. The Fourier Transform Infra-Red analysis confirmed that the bioactive molecules such as alkaloids, polyphenols, flavonoids, etc. in Spondias mombin leaves extract were responsible for the zero-valent iron nanoparticle synthesis and stabilization. The peaks at 2 equal to 44.9o confirmed zero-valent iron (Fe0) in Sm-nZVI. The micrograph showed an average particle size ranging from 13 nm to 158 nm in Sm-nZVI revealing the micro-porosity of the sorbent. The application of Sm-nZVI for the removal of organic ...
Cannabis sativa is known among many cultures for its medicinal potential. Its complexity contribu... more Cannabis sativa is known among many cultures for its medicinal potential. Its complexity contributes to the historical application of various parts of the plant in ethno-medicines and pharmacotherapy. C. sativa has been used for the treatment of rheumatism, epilepsy, asthma, skin burns, pain, the management of sexually transmitted diseases, difficulties during child labor, postpartum hemorrhage, and gastrointestinal activity. However, the use of C. sativa is still limited, and it is illegal in most countries. Thus, this review aims to highlight the biological potential of the plant parts, as well as the techniques for the extraction, isolation, and characterization of C. sativa compounds. The plant produces a unique class of terpenophenolic compounds, called cannabinoids, as well as non-cannabinoid compounds. The exhaustive profiling of bioactive compounds and the chemical characterization and analysis of C. sativa compounds, which modern research has not yet fully achieved, is need...
The essential oil from Gardenia jasminoide flower was obtained by hydrodistillation and analyzed ... more The essential oil from Gardenia jasminoide flower was obtained by hydrodistillation and analyzed by Gas Chromatography (GC). Fifty-four components were characterized, representing 100% of the total components detected . The oil is composed mainly of sesquiterpenes 49.01% and monoterpene 44.33%. The major constituents of sesquiterpenes were identified as α-Farnesene (28.41%) and small amounts of Guaiol (5.89%), (z)-3-Hexenyl Tilgate (5.47%), Bulnesol (5.03%), cis-3-Hexenly Benzoate (4.21%). In the case of monoterpene, Linalool (22.05%) was the major constituent and trans-β-Ocimene (10.59%), α-Terpineol (9.03%) with Methyl Tiglate (2.66%) as the minor component while Tetracosane (5.64%) was the only alkane.
Fatty acids composition of Aspilia africana leaf oil was analyzed by gas chromatography (GC) and ... more Fatty acids composition of Aspilia africana leaf oil was analyzed by gas chromatography (GC) and sixteen acids were identified with seven fatty acids found in trace amounts while nine were in various appreciable amounts. Polyunsaturated essential fatty acids identified are linoleic (C18:2) an “omega-6” is 50.28% and linolenic acid (C18:3) an “omega-3” is 0.28%. The monounsaturated fatty acids oleic acid (C18:1) an “omega-9” and erucic acid C22:1 was found in concentrations of 18.85 and 0.22% respectively. Five saturated fatty acids stearic (C18:0), palmitic (C16:0), behenic (C22:0), arachidic (C20:0) and myristic (C14:0) were obtained in concentrations of 15.10, 11.77, 2.95, 0.54 and 0.001% respectively. The physicochemical analysis gave the free fatty acid (oleic) 8.84%, acid value as 0.86mg KOH/g of oil, iodine value 79 (g of 1/100g of oil), peroxide value 16.2meq of active oxygen/Kg oil and saponification value of 201.21mg KOH/g of oil. The results of the mineral elements concent...
Produced water from Igbo-Etche a community in Rivers State (Niger Delta), Nigeria was analyzed an... more Produced water from Igbo-Etche a community in Rivers State (Niger Delta), Nigeria was analyzed and treated with Inga edulis a potential biocoagulant. It was observed that pH value was within the permissible limits of National Environmental Standard and Regulation Enforcement Agency (NESREA) limit of 6.50-9.50. Turbidity value of (49NTU); concentrations for chloride (21,872mg/l), polycyclic aromatics hydrocarbons (90.79 mg/l), oil and grease (17,742 mg/l) were reduced to 2NTU, 6351.7 mg/l, 13.72 mg/l and 2,884 mg/l respectively on treatment with Inga edulis. The biocoagulant had no effect on conductivity and chromium. However, there was an increase in the concentrations of total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC), biological oxygen demand (BOD) and chemical oxygen demand (COD) after treatment. The concentrations of iron, cadmium, chromium, copper and manganese in the untreated sample were below NESREA/WHO permissible limit. The high concentrations o...
The new compounds 6,6-dimethyl-2-cyclopentadienylethylbicyclo[3.1.1] hept-2-ene (4) and 6,6-dimet... more The new compounds 6,6-dimethyl-2-cyclopentadienylethylbicyclo[3.1.1] hept-2-ene (4) and 6,6-dimethyl-2-indenylethylbicyclo[3.1.1] hept-2-ene (5) were synthesized in 82% and 60% yield respectively using 6,6-dimethyl-2-p-toluenesulphonyloxomethylbicyclo[3.1.1] hept-2-ene (2). However, compounds -(4) and (5) were obtained in 71% and 81% yield respectively using 6,6-dimethyl-2-sulphonyloxomethylbicyclo[3.1.1] hept-2-ene (3). All compounds were characterized by NMR, Infra-red, Micro Analysis and Mass Spectroscopy.
The amido tethered ligand 4–(2–indenylethyl)morpholine (6) have been prepared in high yield (71%)... more The amido tethered ligand 4–(2–indenylethyl)morpholine (6) have been prepared in high yield (71%). All the compounds were fully characterized by NMR, IR, Mass Spec. and Microanalysis. Treatment of the lithio salt of (6) with TiCl4:2THF in THF afforded the new complex 4–(2–indenylethyl)morpholinetitanium dichloride (7a) in 26% yield as viscous green oil while, treatment with ZrCl22THF gave 4–(2– indenylethyl)morpholinezirconium dichloride (7b) in 63% yield as yellow solid. The new compounds (7a and 7b) were characterized by Mass Spectroscopy and Micro Analysis.
Journal of applied science and environmental management, Feb 10, 2022
Elimination of dyes in contaminated water or wastewater has become a universal challenge because ... more Elimination of dyes in contaminated water or wastewater has become a universal challenge because of their colouration, toxicity, mutagenicity and carcinogenicity when discharged into the recipient environment without treatment and several technologies have been developed to deal with this problem. This paper reports the potential of exploring the use and comparison of conventional iron zero-valent (nZVI) nanoparticle and Irvingia gabonensis stabilized iron nanocomposite (Ig-nZVI) for the elimination of methyl red (MR) and methyl orange (MO) dyes in aqueous solution under effect of different experimental conditions of adsorbent dosage, initial dye concentrations, pH, contact time and temperature. Data obtained show an increase in percent dye elimination as the amount of adsorbent increased. The optimal removal of MR and MO occurred in ˂ 60 min of the start of each experimentation, obtained at a maximum pH of 5.1 at 98.5% and 80.6% for adsorbent dosage of 0.3g/50 mL and 20 mg/L initial dye concentration at temperature of 27 o C. The experimental data fitted the Lamgmuir isotherm with maximum adsorption capacity (qmax) of 166.7mg/g (Ig-nZVI) and 83.35 mg/g (nZVI) for MR while 128.21 mg/g (Ig-nZVI) and 40.02.5 mg/g (nZVI) were obtained for MO. Kinetics studies showed that the removal of MR and MO fitted the pseudo second-order model. The adsorption of MR and MO were endothermic and spontaneous with enthalpy values of 3.39kJ/mol (Ig-nZVI) and 776.26kJ/mol (nZVI) and standard Gibbs free energy values of-5.95kJ/mol (Ig-nZVI) and-12.00kJ/mol (nZVI). Thermodynamic studies (ΔG < 0, ΔH < 0, ΔS > 0) implied a spontaneous and exothermic process in nature. The adsorption of MO was endothermic and spontaneous with enthalpy values of 31.70kJ/mol (Ig-nZVI) and 20.91kJ/mol (nZVI) and standard Gibbs free energy values of-5.92kJ/mol and-7.07kJ/mol for Ig-nZVI and nZVI respectively. Adsorbent produced from leaf extracts of African mango tree (Irvingia gabonensis) and stabilized by iron oxide could be an attractive option for elimination of dye from industrial effluents.
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Reactions of Cyclic Anhydrides with Aromatic Primary Amines. Part 3. Synthesis of Novel 3-(N-Aryl... more Reactions of Cyclic Anhydrides with Aromatic Primary Amines. Part 3. Synthesis of Novel 3-(N-Arylcarbamoyl)-and 3-(N-Naphthylcarbamoyl)carboxylic Acids.-A variety of hitherto unreported 3-(N-arylcarbamoyl)propenoic acids (III) and related propanoic acid analogues (V) are synthesized as potential pesticides.-(OMUARU, V. O. T.;
Zero-valent iron nano-particle (nZVI) was modified with Spondias mombin (Sm) leaves extract (Sm-n... more Zero-valent iron nano-particle (nZVI) was modified with Spondias mombin (Sm) leaves extract (Sm-nZVI) for the removal of total petroleum hydrocarbons (TPH), total hydrocarbon content (THC), and polycyclic aromatic hydrocarbons (PAHs) from contaminated soil. Advanced analytical tools such as Fourier Transform Infra-Red (FT-IR) Spectrophotometer, Scanning Electron Microscope(SEM) and X-ray diffractometer (XRD) were used to characterize the biosynthesized zero-valent iron nano-sorbent. The Fourier Transform Infra-Red analysis confirmed that the bioactive molecules such as alkaloids, polyphenols, flavonoids, etc. in Spondias mombin leaves extract were responsible for the zero-valent iron nanoparticle synthesis and stabilization. The peaks at 2 equal to 44.9o confirmed zero-valent iron (Fe0) in Sm-nZVI. The micrograph showed an average particle size ranging from 13 nm to 158 nm in Sm-nZVI revealing the micro-porosity of the sorbent. The application of Sm-nZVI for the removal of organic ...
Cannabis sativa is known among many cultures for its medicinal potential. Its complexity contribu... more Cannabis sativa is known among many cultures for its medicinal potential. Its complexity contributes to the historical application of various parts of the plant in ethno-medicines and pharmacotherapy. C. sativa has been used for the treatment of rheumatism, epilepsy, asthma, skin burns, pain, the management of sexually transmitted diseases, difficulties during child labor, postpartum hemorrhage, and gastrointestinal activity. However, the use of C. sativa is still limited, and it is illegal in most countries. Thus, this review aims to highlight the biological potential of the plant parts, as well as the techniques for the extraction, isolation, and characterization of C. sativa compounds. The plant produces a unique class of terpenophenolic compounds, called cannabinoids, as well as non-cannabinoid compounds. The exhaustive profiling of bioactive compounds and the chemical characterization and analysis of C. sativa compounds, which modern research has not yet fully achieved, is need...
The essential oil from Gardenia jasminoide flower was obtained by hydrodistillation and analyzed ... more The essential oil from Gardenia jasminoide flower was obtained by hydrodistillation and analyzed by Gas Chromatography (GC). Fifty-four components were characterized, representing 100% of the total components detected . The oil is composed mainly of sesquiterpenes 49.01% and monoterpene 44.33%. The major constituents of sesquiterpenes were identified as α-Farnesene (28.41%) and small amounts of Guaiol (5.89%), (z)-3-Hexenyl Tilgate (5.47%), Bulnesol (5.03%), cis-3-Hexenly Benzoate (4.21%). In the case of monoterpene, Linalool (22.05%) was the major constituent and trans-β-Ocimene (10.59%), α-Terpineol (9.03%) with Methyl Tiglate (2.66%) as the minor component while Tetracosane (5.64%) was the only alkane.
Fatty acids composition of Aspilia africana leaf oil was analyzed by gas chromatography (GC) and ... more Fatty acids composition of Aspilia africana leaf oil was analyzed by gas chromatography (GC) and sixteen acids were identified with seven fatty acids found in trace amounts while nine were in various appreciable amounts. Polyunsaturated essential fatty acids identified are linoleic (C18:2) an “omega-6” is 50.28% and linolenic acid (C18:3) an “omega-3” is 0.28%. The monounsaturated fatty acids oleic acid (C18:1) an “omega-9” and erucic acid C22:1 was found in concentrations of 18.85 and 0.22% respectively. Five saturated fatty acids stearic (C18:0), palmitic (C16:0), behenic (C22:0), arachidic (C20:0) and myristic (C14:0) were obtained in concentrations of 15.10, 11.77, 2.95, 0.54 and 0.001% respectively. The physicochemical analysis gave the free fatty acid (oleic) 8.84%, acid value as 0.86mg KOH/g of oil, iodine value 79 (g of 1/100g of oil), peroxide value 16.2meq of active oxygen/Kg oil and saponification value of 201.21mg KOH/g of oil. The results of the mineral elements concent...
Produced water from Igbo-Etche a community in Rivers State (Niger Delta), Nigeria was analyzed an... more Produced water from Igbo-Etche a community in Rivers State (Niger Delta), Nigeria was analyzed and treated with Inga edulis a potential biocoagulant. It was observed that pH value was within the permissible limits of National Environmental Standard and Regulation Enforcement Agency (NESREA) limit of 6.50-9.50. Turbidity value of (49NTU); concentrations for chloride (21,872mg/l), polycyclic aromatics hydrocarbons (90.79 mg/l), oil and grease (17,742 mg/l) were reduced to 2NTU, 6351.7 mg/l, 13.72 mg/l and 2,884 mg/l respectively on treatment with Inga edulis. The biocoagulant had no effect on conductivity and chromium. However, there was an increase in the concentrations of total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC), biological oxygen demand (BOD) and chemical oxygen demand (COD) after treatment. The concentrations of iron, cadmium, chromium, copper and manganese in the untreated sample were below NESREA/WHO permissible limit. The high concentrations o...
The new compounds 6,6-dimethyl-2-cyclopentadienylethylbicyclo[3.1.1] hept-2-ene (4) and 6,6-dimet... more The new compounds 6,6-dimethyl-2-cyclopentadienylethylbicyclo[3.1.1] hept-2-ene (4) and 6,6-dimethyl-2-indenylethylbicyclo[3.1.1] hept-2-ene (5) were synthesized in 82% and 60% yield respectively using 6,6-dimethyl-2-p-toluenesulphonyloxomethylbicyclo[3.1.1] hept-2-ene (2). However, compounds -(4) and (5) were obtained in 71% and 81% yield respectively using 6,6-dimethyl-2-sulphonyloxomethylbicyclo[3.1.1] hept-2-ene (3). All compounds were characterized by NMR, Infra-red, Micro Analysis and Mass Spectroscopy.
The amido tethered ligand 4–(2–indenylethyl)morpholine (6) have been prepared in high yield (71%)... more The amido tethered ligand 4–(2–indenylethyl)morpholine (6) have been prepared in high yield (71%). All the compounds were fully characterized by NMR, IR, Mass Spec. and Microanalysis. Treatment of the lithio salt of (6) with TiCl4:2THF in THF afforded the new complex 4–(2–indenylethyl)morpholinetitanium dichloride (7a) in 26% yield as viscous green oil while, treatment with ZrCl22THF gave 4–(2– indenylethyl)morpholinezirconium dichloride (7b) in 63% yield as yellow solid. The new compounds (7a and 7b) were characterized by Mass Spectroscopy and Micro Analysis.
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