Research Article
Volumetric, Ultrasonic and Viscometric Studies of Molecular Interactions in Binary Mixtures of Isopropyl Benzene (Cumene) with Aromatic Hydrocarbons at 298.15K
Issue:
Volume 11, Issue 1, March 2026
Pages:
1-13
Received:
24 January 2026
Accepted:
4 February 2026
Published:
26 February 2026
Abstract: Theoretical and experimental research on binary liquid mixtures of isopropyl benzene (cumene) with aromatic hydrocarbons at 298.15 K is presented in this article. For these binary mixtures, experimental measurements of the density (ρ), viscosity (η), and speed of sound (u) have been made at 298.15 K. The excess molar volume (), excess adiabatic compressibility (), excess sound velocity (uᴱ), and deviation in viscosity (ηᴱ) have all been computed from the experimental measurements. These excess parameters have been correlated using the Redlich–Kister polynomial equation. Positive excess properties were discovered, reflecting the distinctive behavior of the liquid mixtures and suggesting the existence of particular molecular interactions. Significant specific interactions between the components, mainly controlled by molecular association, are suggested by the positive values of the excess properties. The molecular structure and intrinsic characteristics of the liquid mixtures determine how strong these interactions are in liquid mixtures. The results indicated the presence of weak interactions between 1,4-dioxane and aromatic hydrocarbon molecules, which follows the order: Ethyl benzene > toluene > mesitylene > n-propyl benzene> tert-butyl benzene > biphenyl. It is observed that the interactions depend on the number and position of the methyl groups in these aromatic hydrocarbons. The observed trends in the following systems indicate weak to moderate interactions, primarily π–π and solute-solvent interaction.
Abstract: Theoretical and experimental research on binary liquid mixtures of isopropyl benzene (cumene) with aromatic hydrocarbons at 298.15 K is presented in this article. For these binary mixtures, experimental measurements of the density (ρ), viscosity (η), and speed of sound (u) have been made at 298.15 K. The excess molar volume (), excess adiabatic com...
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Research Article
Lead Pollution Level and Human Health Risks Assessment in Topsoil Under Different Land-use in the Korhogo City (Northern Côte d’Ivoire)
Kakou Charles Kinimo*,
Donafolgui Yeo,
Tano Patrice Fato,
Koffi Pierre Dit Adama Ngoran,
Krougba Yves Nangah,
Bi Irie Herve Goure Doubi
Issue:
Volume 11, Issue 1, March 2026
Pages:
14-24
Received:
23 March 2026
Accepted:
3 April 2026
Published:
16 April 2026
DOI:
10.11648/j.wjac.20261101.12
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Abstract: Rapid urban growth and industrial activities have intensified the presence of toxic elements in urban soils, with lead (Pb) being of particular concern. This study provides the first comprehensive assessment of Pb contamination and associated human health risks in the urban soils of Korhogo, northern Côte d’Ivoire. Twenty surface soil samples (0–5 cm) were collected from four land use categories including residential, public gardens, commercial areas, and peri urban zones and analyzed using inductively coupled plasma atomic emission spectrometry (ICP AES). Pollution levels were evaluated through geochemical indices (contamination factor, CF, and geoaccumulation index, Igeo), while probabilistic risk models quantified potential health impacts. Results show that Pb concentrations follow the order: commercial > public garden > residential > peri urban, with values exceeding WHO/FAO permissible limits. Commercial soils exhibited moderate contamination, whereas other sites showed low levels. Oral ingestion and dermal absorption were identified as the main exposure pathways. Risk assessment indicated no non carcinogenic effects for adults or children, while carcinogenic risks remained within the acceptable range, though more pronounced in children. These findings establish a baseline for sustainable monitoring and management of Pb contamination in urban soils of Korhogo.
Abstract: Rapid urban growth and industrial activities have intensified the presence of toxic elements in urban soils, with lead (Pb) being of particular concern. This study provides the first comprehensive assessment of Pb contamination and associated human health risks in the urban soils of Korhogo, northern Côte d’Ivoire. Twenty surface soil samples (0–5 ...
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,
Chandrapal Prajapati
