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Radiation levels of dumpsites within Imo State University, Owerri, Imo State, Nigeria

100%
Wirnkor V. A., Ebere E. C., Chukwunonso O. F., Ngozi V. E.
World News of Natural Sciences
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2017
|
vol. 11
45-64
EN
With increasing population and human activities, dumpsites experience diverse sources of waste with potential radiation hazards. Ionizing radiations have often been overlooked amongst researchers in third world countries, hence, information in this regard is lacking. In this study, nine dumpsites within Imo State University (IMSU) grounds were assessed for radiation levels using Geiger Muller counter Tube Mullard type ZP 1481 with assisted scalar and stopwatch. After calibration, the instrument was placed one meter above ground level and count rates recorded at 10 minutes interval for each location once in the morning, the afternoon and the evening for seven days. Results reveal higher dose equivalents in some morning periods than in the afternoon and evening. Site ETF2 had highest value of 0.69±0.08 mSv·yr-1, while Extension gate had lowest value of 0.56±0.01 mSv·yr-1. Compared to National Council for Radiation Protection maximum permissible level, these values are quite low. In conclusion, ionizing radiations levels at the studied dumpsites in Imo State University grounds are low and may not pose a threat to persons within the university.
2
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Water Quality Index and Human Health Risk Assessment of Class B Swimming Pools in Owerri Municipal, Nigeria

100%
Ngozi V. E., Nwachukwu J. I., Chidera Lydia U. C., Wirnkor V. A.
World News of Natural Sciences
|
2021
|
vol. 38
60-82
EN
Assessments of public swimming pools in Owerri municipal, Imo state, Nigeria was carried out for the purpose of determining the suitability of water for swimming in this fun loving town of Nigeria. Five public pools were selected by purposive sampling from more than 30 pools in the area. Water samples were collected in the morning and evening from pools and analyzed in triplicates for physicochemical properties and heavy metals content by using standard method for water analysis and Atomic Absorption Spectrometer. Data obtained were compared with WHO and EPA standards for drinking and recreational water and modeled on the Water Quality Index (WQI). Results revealed that pH ranged from 7.10±0.02 to 8.1±1.27 pH units, EC ranged from 40 ±3.11 µS/cm to 80±3.44 µS/cm, COD value ranged from 0.08±0.07 to 1.02 ±0.91, BOD value ranged from 0.03±0.02 to 3.14±0.13, dissolved oxygen (DO) ranged 3.9±1.77 mg/kg to 9.3±2.41 mg/kg, suspended solids ranged from 6.43±8.21 mg/l to 42.44±7.00 mg/l, total dissolved solids (TDS) ranged from 22±2.90 mg/l to 97.98±8.79 mg/l. The major cations were below the standard. Nitrate ranged from 0.91±0.02 mg/l to 0.96 mg/l, sulphate ranged from 2.34±0.10 mg/l to 2.81±0.11mg/l, phosphate ranged from 0.34±0.02 mg/l to 0.65±0.02 mg/l while chloride ranged from 12.75±1.89 mg/l to 31.89±2.04 mg/l with mean 24.23 mg/l. Except for chloride, all other studied anions were lower than the permissible limit set by WHO/EPA. Concentration of lead (Pb), iron (Fe), Copper (Cu) were also below the permissible limit. The individual WQ indexes showed A (3.32), B (5.44), C (10.08), D (12.40) and E (9.77) with average WQI of 8.20 suggesting that the swimming pools are of “Excellent water quality”, thereby suggesting safe swimming pools for recreational activities in the study area. Values of exposure pathways for all metals at all swimming.
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Determination and correlation of physicochemical properties of aqueous extracts from edible portions of common tropical fruits

88%
Ejiako E. J., Ngozi V. E., Ebele M. S., Wirnkor V. A., Ehirim F.
World News of Natural Sciences
|
2023
|
vol. 47
104-114
EN
The quantity and quality of these constituent may not usually be the same under certain conditions, so fruits sold in Owerri where heavy pollutant abound were analysed, three samples of each water melon, Pawpaw, pineapple and orange fruits were bought from Owerri commercial centre and their juices extracted and stored in screw cap bottles prior to analysis. The physiochemical parameters revealed that fruits were of good quality but showed positive and negative significant relationship correlation ships such as pH-FW (0.958), pH-SG (-0.025), TS-MC (-0.999), TA-FW (-0.987). Vitamin C content ranged from 13.14 ± 0.39 mg/100g to 75.46 ±1.72 mg/100g for water melon and orange respectively. In conclusion, fruits studied showed good quality and a good source of vitamin C and mineral content. Such analysis needs to be carried out periodically to ensure quality and create awareness to the public.
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