David Azanu - Academia.edu (original) (raw)

Papers by David Azanu

Technological Innovation Driving Sustainable Entrepreneurial Growth in Developing Nations

The use of antibiotics is widespread throughout the world, and Ghana is not an exception. They ar... more The use of antibiotics is widespread throughout the world, and Ghana is not an exception. They are one of the most frequently prescribed medications. Antibiotic residue concentrations are rising in the environment and are found in practically all water bodies, including lakes and rivers, because of inadequate management of residential and medical wastes. Contrarily, there is a substantial chance of medication toxicity and resistance. Therefore, removal of these pollutants from water bodies is essential, yet conventional wastewater or water treatment methods frequently fall short of efficiently removing these chemicals. Antibiotics will be used as a case study in this chapter to discuss the concentration of pharmaceutical pollutants in the environment, specifically in Ghanaian waterbodies, and risk evaluations of these pollutants. Additionally, this chapter will look into the possible removal technologies report and establish the present investigation on removing these pollutants wit...

Science of The Total Environment, May 1, 2018

Polymer Journal, Apr 1, 2017

The present paper has determined the radioactivity concentrations, which are due to natural occur... more The present paper has determined the radioactivity concentrations, which are due to natural occurrence of radionuclides along with heavy metal concentration in water, sediment, and fish from 2 reservoirs in Ghana. Heavy metal concentrations in all samples were generally within the WHO safe limits with the average activity concentrations of 238 U, 232 Th, and 40 K in water being respectively 0.42±0.20, 0.33±0.31, and 1.59±1.07 Bq/L in case of Lake Bosomtwe and 0.26±0.14, 0.67±0.34 and 1.47±0.62 Bq/L for Bui Dam in Ghana. The average annual effective dose due to ingestion of radionuclides in water ranged from 20.5 to 156 for Lake Bosomtwe and 26.5 to 162 μSv/year for Bui dam and the absorbed dose rate and annual effective dose, measured for Lake Bosomtwe, was 15.45±2.00 nGy/year and 18.95±2.95 S/year respectively while in case of Bui dam it accounted to 10.44±4.11 nGy/year and 12.88±5.01 S/year respectively, found to be within the UNSCEAR recommended limits of 59 nGy/year and 100 S...

An article published by International Journal of Advanced Research (2014), Volume 2, Issue 5, 113... more An article published by International Journal of Advanced Research (2014), Volume 2, Issue 5, 1132-1141

An article published by International Journal of Environmental Science and Toxicology Research (I... more An article published by International Journal of Environmental Science and Toxicology Research (ISSN: 2408-7262) Vol. 2(6) pp. 130-135, June, 2014

A study which aimed at identifying practices of street sugar cane vendors, heavy metals, and micr... more A study which aimed at identifying practices of street sugar cane vendors, heavy metals, and microbial food contaminants which could pose a public health risk concern was done in the Kumasi Metropolis in Ghana. Thirty sugar cane vendors were interviewed and representative samples were purchased for analysis. Lead (Pb), cadmium (Cd), copper (Cu), zinc (Zn), manganese (Zn), iron (Fe) were analyzed with AAS. Total coliform, fecal coliform, and E. coli were determined by the standard most probable number method. The sugar cane selling business from the survey is generally dominated by females within the working age group. From the field survey it was realized that packaged sugar cane was patronized mostly in the evening period. Out of the total of 30 vendors, 12 of them just peel the sugar cane and cut into pieces for package and sales while 18 of the vendors washed the product before peeling and cutting it into pieces for packaging. All the metals analyzed were detected in the various ...

Journal of Science and Technology (Ghana), 2014

The International Journal of Science & Technoledge, 2021

Journal of Chemistry, 2021

Pharmaceuticals, among the emerging contaminants, are pseudopersistent and recently of serious co... more Pharmaceuticals, among the emerging contaminants, are pseudopersistent and recently of serious concern due to universal use, toxicity, and resistance development at low concentrations. This study was aimed at assessing the prevalence and risk of eight pharmaceuticals in surface water used for vegetable irrigation in Ghana’s Kumasi and Sunyani metropolises, which are influenced by hospitals, sewage treatment facilities, and market effluents. Samples were concentrated via solid-phase extraction (SPE) while liquid chromatography was used to identify and quantify the analytes. Ibuprofen, acetaminophen, and diclofenac were the detected analgesics in this study, with concentrations stretching from below detection limit (not detected) to 319.0 ng/L, while amoxicillin, trimethoprim, and cefuroxime were the detected antibiotics with a concentration range of no detection to 840.0 ng/L. Based on the available long-term data, an environmental risk assessment was conducted. Because of the presen...

$Research paper thumbnail of Evolution of Hall coefficient and thermoelectric power in <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>N</mi><msub><mi>d</mi><mrow><mn>2</mn><mo>−</mo><mi>x</mi></mrow></msub><mi>C</mi><msub><mi>e</mi><mi>x</mi></msub><mi>C</mi><mi>u</mi><msub><mi>O</mi><mrow><mn>4</mn><mo>+</mo><mspace linebreak="newline"></mspace><mi>d</mi><mi>e</mi><mi>l</mi><mi>t</mi><mi>a</mi></mrow></msub></mrow><annotation encoding="application/x-tex">Nd_{2-x}Ce_xCuO_{4+\\delta}</annotation></semantics></math>Nd2−xCexCuO4+delta$

A thesis submitted to the Department of Chemistry, College of Science, Kwame Nkrumah University o... more A thesis submitted to the Department of Chemistry, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi in partial fulfilment of the requirements for the award of the degree Doctor of Philosophy in Analytical Chemistry, 2016

Environmental Modeling & Assessment, 2020

A model for predicting the uptake of tetracycline and amoxicillin by vegetable plants using STELL... more A model for predicting the uptake of tetracycline and amoxicillin by vegetable plants using STELLA® was developed. Simulations were performed for a 30-day period during which lettuce and carrot were irrigated with the two antibiotics of known concentrations. The model predicts antibiotic concentrations in several compartments, including porewater, soil, and plant tissues. Simulations showed that the number of antibiotics found in soil fraction was larger than the amount in plant tissues. The developed model for tetracycline uptake by carrot gave a chi-square ( χ 2 ) value of 0.2 and by lettuce recorded a χ 2 value of 0.6. The model was considered efficient based on the χ 2 values. Validation of the antibiotic’s uptake model showed an appreciable agreement between simulated and measured experimental data with deviation expressed as percentage being 2.6% for tetracycline uptake by carrot model and 37.9% for tetracycline uptake by lettuce model. Leaching and evaporation processes of antibiotics were found from the sensitivity analysis of the model to be the most important processes influencing the uptake model. These processes could be determined accurately and hence makes the model easily adoptive for other antibiotics. Further antibiotic uptake studies should focus on the physical-chemical properties of the antibiotics and abiotic environmental condition effect on the uptake model developed.

International Journal of Food Contamination, 2019

Cogent Environmental Science, 2018

Journal of Science and Technology (Ghana), 2016

Cogent Environmental Science, 2016