John Olusanya Jacob pf1015 - Academia.edu (original) (raw)
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Papers by John Olusanya Jacob pf1015
Properties and Applications of Superabsorbent Polymers, 2023
Environmental Monitoring and Assessment
Nano-Structures & Nano-Objects
Journal of Chemical Technology & Biotechnology
American Journal of Chemistry, 2012
The heavy metals levels in soil and the edible parts of three popular vegetables, widely consumed... more The heavy metals levels in soil and the edible parts of three popular vegetables, widely consumed in Nigeria; spinach (Amaranthus hybridus), jute mallow (Corchorus olitorius) and tomato (Lycopersicon esculentum) were assessed in farms within the city of Kaduna, Nigeria. The city was divided into 20 zones, for the purpose of this study, and composite samples of soils and vegetables were collected from farms and gardens in each zone and also from two rural villages, about 30 km from the city (as control). Samples were digested using a 3:1 mixture of concentrated HNO 3 and HClO 4 acids. Recovery test on method of digestion gave % recoveries > 95% while in the analysis of reference materials of soil and plant, t-test results (at 95% Confidence Interval) show that statistically, there exists no significant difference between certified and obtained values. Digests were analysed using Flame Atomic Absorption Spectrophotometer. The mean and range of heavy metals concentrations (µg/g dry weight) in digested soil samples were
International Journal of Chemistry, 2012
Groundwater has been recognized as playing a very important role in the development of Abuja, Nig... more Groundwater has been recognized as playing a very important role in the development of Abuja, Nigeria's Capital as many households, private and government establishments depends solely on hand-dug wells and boreholes for their daily water needs. Exploitation of groundwater is rather delicate because of its potency to contamination and difficulty to remediate when compared to surface water. The purpose of this paper is to present the occurrence of nitrate in groundwater of Abuja and discuss the implication and sources of the nitrate. High nitrate level in drinking water leads to infant methaemoglobinaemia (blue-baby syndrome), gastric cancer, metabolic disorder and livestock poisoning. A simplified map of nitrate occurrences in Abuja indicates that some areas have nitrate concentration above the WHO and NSDWQ guide limit of 50 mg/l and it is dominant in the rainy season than dry season. The number of people drinking water with nitrate concentration above the permissible level cannot be quantified presently. The sources of nitrate in the groundwater were attributed to bedrock dissolution in the course of groundwater migration and more importantly anthropogenic activities such as on-site sanitation, waste dumpsites and agricultural chemicals. Water treatment by bio-denitrification and nitrate pollution control programs should be introduced at local, state and federal levels in order to educate people on the need to protect groundwater from nitrate pollution caused by agricultural activity and indiscriminate disposal of wastes.
Pakistan Journal of Nutrition, 2014
Properties and Applications of Superabsorbent Polymers, 2023
Environmental Monitoring and Assessment
Nano-Structures & Nano-Objects
Journal of Chemical Technology & Biotechnology
American Journal of Chemistry, 2012
The heavy metals levels in soil and the edible parts of three popular vegetables, widely consumed... more The heavy metals levels in soil and the edible parts of three popular vegetables, widely consumed in Nigeria; spinach (Amaranthus hybridus), jute mallow (Corchorus olitorius) and tomato (Lycopersicon esculentum) were assessed in farms within the city of Kaduna, Nigeria. The city was divided into 20 zones, for the purpose of this study, and composite samples of soils and vegetables were collected from farms and gardens in each zone and also from two rural villages, about 30 km from the city (as control). Samples were digested using a 3:1 mixture of concentrated HNO 3 and HClO 4 acids. Recovery test on method of digestion gave % recoveries > 95% while in the analysis of reference materials of soil and plant, t-test results (at 95% Confidence Interval) show that statistically, there exists no significant difference between certified and obtained values. Digests were analysed using Flame Atomic Absorption Spectrophotometer. The mean and range of heavy metals concentrations (µg/g dry weight) in digested soil samples were
International Journal of Chemistry, 2012
Groundwater has been recognized as playing a very important role in the development of Abuja, Nig... more Groundwater has been recognized as playing a very important role in the development of Abuja, Nigeria's Capital as many households, private and government establishments depends solely on hand-dug wells and boreholes for their daily water needs. Exploitation of groundwater is rather delicate because of its potency to contamination and difficulty to remediate when compared to surface water. The purpose of this paper is to present the occurrence of nitrate in groundwater of Abuja and discuss the implication and sources of the nitrate. High nitrate level in drinking water leads to infant methaemoglobinaemia (blue-baby syndrome), gastric cancer, metabolic disorder and livestock poisoning. A simplified map of nitrate occurrences in Abuja indicates that some areas have nitrate concentration above the WHO and NSDWQ guide limit of 50 mg/l and it is dominant in the rainy season than dry season. The number of people drinking water with nitrate concentration above the permissible level cannot be quantified presently. The sources of nitrate in the groundwater were attributed to bedrock dissolution in the course of groundwater migration and more importantly anthropogenic activities such as on-site sanitation, waste dumpsites and agricultural chemicals. Water treatment by bio-denitrification and nitrate pollution control programs should be introduced at local, state and federal levels in order to educate people on the need to protect groundwater from nitrate pollution caused by agricultural activity and indiscriminate disposal of wastes.
Pakistan Journal of Nutrition, 2014