Electroanalytical/environmental Nanochemistry With A Focus On Preparation And Characterization Of Catalyst And Modified Electrodes To Eventual Application As Electrochemical Devices Nanosensor In An Environmental Water System
At the Chemistry department office
Appointment on Visitation important
Topic: Determination Of Heavy Metals, Trace Metals And Trace Organics, And Their Remediation In Environmental Samples Such As Surface And Underground Waters, Soil/dust, Sediments, And Other Matrices.
Description: The pollution of the aquatic environment with heavy metals has become a worldwide problem during recent years, because they are indestructible and most of them have toxic effects on organisms Among environmental pollutants, metals are of particular concern, due to their potential toxic effect and ability to bioaccumulate in aquatic ecosystems. The level and distribution of heavy metal in aquatic ecosystems are usually monitored by measuring their concentrations in water, sediments and biota, which generally exist in low levels in water and attain considerable concentration in sediments and biota. Heavy metals including both essential and non-essential elements have a particular significance in ecotoxicology, since they are highly persistent and all have the potential to be toxic to living organisms.
|Ph.D (ELECTROANALYTICAL /ENVIRONMETAL NANO CHEMISTRY)
|NATURAL SCIENCE, UNIVERSITY OF THE WESTERN CAPE, SOUTH AFRICA
Dye-Assisted Analysis of Fluoride in Water Using UV-Visible Spectrophotometry: A Preliminary Study
With respect to water, fluoride contamination is known to constitute a potential health hazard in many parts of the world and a global challenge, as higher concentrations of fluoride than the standard value have been recorded across the globeIn this study, a dye-assisted method for the analysis of fluoride F - content of water has been developed using flowering plants. This was done to evaluate the potentials of the locally accessible dyes in spectrophotometrically detecting F - levels in synthetic fluoride-containing water samples. Dye solutions obtained from scarlet jungle flame Ixora coccinea , Hibiscus flower Hibiscus rosa-sinensis , Peacock flower or Barbados pride Caesalpinia pulcherrima , Royal poinciana Delonix regia , Pink bauhinia Bauhinia monandra , Barbados lily or Easter lily Hippeastrum puniceum were adopted to monitor the absorbance and corresponding concentrations of serially prepare F - concentrations in the range of 0.001 to 0.012 ppm. Dye from Hibiscus flower Hibiscus rosa-sinensis gave an optimal performance with R 2 = 0.9792. Using this dye, the F - content in water samples obtained from tap waters from Moremi Estate, Modomo, Asherifa, Postgraduate PG Hall of Obafemi Awolowo University OAU , Ile-Ife and well water sample from Modomo gave 0.052, 0.053, 0.053, 0.058 and 0.061 ppm respectively as F - concentrations. Comparison of these values indicated that all the water samples monitored were safe for human consumption without experiencing health challenges, such as fluorosis, or lowered IQ in children as the 1.50 ppm maximum F - limit for potable water recommended by WHO was not exceeded. This study concluded that dye from Hibiscus flower Hibiscus rosa-sinensis could satisfactorily assist in monitoring F - content in water where ion-selective electrodes are not readily accessible.
TOVIDE OLUWAKEMI is a Senior Lecturer at the Department of Chemistry
TOVIDE has a Ph.D in ELECTROANALYTICAL /ENVIRONMETAL NANO CHEMISTRY from NATURAL SCIENCE, UNIVERSITY OF THE WESTERN CAPE, SOUTH AFRICA