Mohammed Aminat Aderonke
@unilorin.edu.ng
Lecturer, Faculty of Physical Sciences
University of Ilorin
RESEARCH, TEACHING, or OTHER INTERESTS
Analytical Chemistry, Materials Chemistry, Polymers and Plastics
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Aminat Aderonke Mohammed, Abdullah Suleiman Ibrahim, Fatai Olayiwola Okeola, Ibrahim Kuranga Ayinla, Benjamin Oche Anthony, and AbdulAzeez Atobiloye
Informa UK Limited
Fatai OKEOLA, Taofeeqat ABU, Aminat MOHAMMED, Muyiwa OROSUN, Abdullahi BABA, and Mariam Bolanle ADEBOJE
The Turkish Chemical Society
This study investigated the effects of prolonged storage conditions on the physicochemical parameter, toxic metals, microbial loads, and health risks assessment of randomly selected three brands of sachet and bottled water in North Central, Nigeria. One hundred eighty samples of water brands (sachet and bottled) were collected from 10 different factories and were grouped into three. They were analyzed immediately (initial), being exposed to mild sunlight (stored with a container) and exposed to intense sunlight (stored without a container) conditions for six weeks. The results of the physicochemical parameters (sachet and bottle) were within the limits set by the World Health Organization (WHO) and the Standard Organization of Nigeria (SON). While the results of heavy metals analysis for both sachet and bottled water recorded 0.15 - 0.51 mg/L (0.10 mg/L , 0.05 mg/L), 0.13 - 0.38 mg/L (0.015 mg/L, 0.01 mg/L) and 0.55 - 1.11 mg/L (0.03 mg/L, 0.3 mg/L) for Chromium (Cr), Lead (Pb) and Iron (Fe) respectively, as compared to the permissible limits (values in the bracket for each heavy metals) set by WHO and SON. The microbial analysis results ranged between 6.58 - 124.51 Cfu/100 mL, 0.52 - 37.56 Cfu/100 mL, 0.07 - 5.00 Cfu/100 mL, 0 - 2.07 Cfu/100 mL for Total Bacteria Count (TBC), Total Coliform Count (TCC), Faecal Coliform Count (FCC) and Total Fungal Count (TFC) respectively, which showed no effective quality control system. Incremental lifetime cancer risk (ILCR) assessment revealed a carcinogenic health risk to the populace drinking this water. The study concludes that water stored under sunlight for a long period is not good for human consumption and therefore adequate monitoring by the appropriate agencies is emphasized.
A.A. Mohammed, M.M. Orosun, F.O. Okeola, M.A. Raji, G.O. Tesi, and O.J. Yusuph
African Journals Online (AJOL)
ABSTRACT. In this study, the concentration and risk of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in 9 composite samples around the vicinity of an Asphalt plant in North Central, Nigeria, was evaluated. Aqua-regia wet digestion was used for heavy metals extraction in the water samples while atomic absorption spectrometry was used quantification. For PAHs, liquid-liquid extraction was used for extraction while gas chromatography-mass spectrometry was used for quantification of PAHs in the extracts. The risk assessment was estimated using the hazard index (HI) and incremental lifetime cancer risk (ILCR) in all the samples studied. The results showed that Cd and Cr were present in concentrations higher than their permissible limits in water set by World Health Organization, while Pb was not detected. Total concentration of 14 PAHs ranged between 6.47–390 mg L-1 and were within the WHO permissible limits. High molecular weight PAHs were dominant (71.54%) relative to low molecular weight PAHs (28.46%). The risk assessment results revealed that 100% ILCRtotal values recorded for heavy metals were higher than the recommended limit. While 37.5% of ILCRtotal values recorded for PAHs were higher than the recommended values, implying that residents are exposed to health risks from both metals and PAHs.
 KEY WORDS: Asphalt plant, Heavy metals, Polycyclic aromatic hydrocarbons,Water, Risk assessment
 Bull. Chem. Soc. Ethiop. 2023, 37(6), 1337-1349. DOI: https://dx.doi.org/10.4314/bcse.v37i6.4
Aminat Aderonke Mohammed, Ojeyemi Matthew Olabemiwo, and Abass Abiola Olajire
Informa UK Limited
A.A. Olajire and A.A. Mohammed
Elsevier BV
A.A. Olajire and A.A. Mohammed
Elsevier BV
A.A. Olajire and A.A. Mohammed
Elsevier BV
Aminat MOHAMMED, Pascal INİAGHE, Taofeeqat ABU, Majeed BELLO, and Mariam ABDULKADİR
The Turkish Chemical Society
In this study, landfill leachates and plants from Olusosun landfill in Ojota area of Lagos State, Nigeria were investigated. Physicochemical parameters, concentrations of heavy metals (HMs – Pb, Cd, Cr, Ni, Mn and Zn) and polycyclic aromatic hydrocarbons (PAHs) were determined in leachates while HMs and PAHs were determined in plants. Perchloric and sulfuric acids mixtures were used for digesting both the leachates and plant samples prior to quantification by atomic absorption spectrometry. Cold extraction was used for extracting PAHs and quantified using gas chromatography-mass spectrometry. The range of results on HMs analysis were: leachates (mg/L) - Pb: 0.60 - 1.10, Cd: 0.04 - 0.05, Cr: 0.30 - 0.40, Ni: 0.13 - 0.19, Mn: 0.53 - 0.74 and Zn: 2.24 - 3.72; plants (mg/kg) – Pb: 1.0 – 6.0, Cd: 0.3 – 0.5, Cr: 0.0 – 4.0, Ni: 0.2 – 1.6, Mn: 10.1 – 41.2 and Zn: 0.0 – 13.2 respectively. For PAHs, the concentrations (mg/L) ranged from 0.10 - 0.24 and 0.09 - 0.31 mg/kg for leachates and plants respectively. Pearson correlation and principal component analysis identified the main sources of pollution on Olusosun landfill as anthropogenic. Proper management of the landfill is advised to prevent contamination of groundwater and surface waters.
A.A. Olajire and A.A. Mohammed
Elsevier BV
A.A. Olajire and A.A. Mohammed
Elsevier BV
Oluwaseyi D. Saliu, Gabriel A. Olatunji, Azeh Yakubu, Mariam T. Arowona, and Aminat A. Mohammed
Walter de Gruyter GmbH
AbstractHydrophobic cellulosic composites with the nano form of metal oxides possess good absorptive and adsorptive potentials. Native cellulose was regenerated, benzylated, crosslinked and blended with TiO2 nanoparticles to absorb toluene, xylene, chloroform, kerosene and petrol. The composite was fully characterized by scanning electron microscopy (SEM), transmission emission microscopy (TEM), Fourier transform infrared (FTIR) and X-ray diffraction (XRD). The effect of crosslinker, catalyst and time of absorption was investigated. The FTIR shows stretch and bend vibrations of hydroxyl (-OH), alkyl (-CH), aromatic double bond (C=C) for benzyl cellulose while the appearance of new peaks at 816, 769 and 726 cm−1 for Ti-O stretching vibrations confirms the successful synthesis of the composite. The SEM images revealed the transformation of foam-like appearance of benzyl cellulose to a solidified mass after TiO2 compositing. Enhanced oil absorption was seen as the amount of the aluminum sulfate catalyst was doubled as a high Qmax of 24.16, 25.81, 27.22, 24.03 and 24.43 was obtained when the amount of catalyst used was doubled.