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Articles by V.O. Ajibola
Total Records ( 7 ) for V.O. Ajibola
  O.A. Babatunde and V.O. Ajibola
  Concentrations of Phosphates (PO43-), Nitrates (NO3-), Sulphates (SO42-), Chlorides (Cl-), soil pH and organic matter were measured along the profile of irrigated agricultural soils collected in Zaria, a town in Northern Nigeria. The result showed that the irrigated factor, agricultural factor and anthropogenic factor all contributed to the relations between selected chemical properties. The results showed that only chlorides seem to intrinsically relate to the soils.
  V.O. Ajibola and M.K. Ladipo
  A study was conducted for the analysis of pollution load in industrial effluents from 6 industries in Ilupeju Industrial Estate, Lagos. Main drains from these industrial units which included chemical, soap and oil, textile, pharmaceutical and steel industries were analyzed for various physical and chemical parameters like temperature, pH, salinity, anions and heavy metals content. Analysis of the samples collected over a period of 7 months showed that most of the parameters investigated exceeded the federal environmental protection standards for effluents.
  M.K. Ladipo , V.O. Ajibola and S.J. Oniye
  Multivariate statistical methods, i.e., Cluster Analysis (CA), Principal Component Analysis (PCA) and Discriminant Analysis (DA) were used to assess temporal and spatial variations in the water quality of the Lagos Lagoon during the wet period (July 2007 and 2008) anddry seasons (February 2008 and 2009). The study was focused on nine locations of the lagoon, specifically to describe the distribution of water physicochemical parameters and identify the parameter (s) that most influence the distributions observed. Physicochemical parameters (pH, EC, salinity, turbidity, DO, BOD5, COD, TSS, TDS, alkalinity, NO3, PO4 and SO4) were used to study spatial and temporal variations in water quality of these locations. The descriptive statistics of the average values obtained for each location during the period of study were discussed. The results obtained from the detailed chemical analysis of water from the different sections of the lagoon confirmed the dynamic nature and diverse chemistry of the water. Multivariate analysis of obtained data during the periods of study further reflects this diversity during each of the periods samples were collected. The loading pattern of principal components showed some variations during each of the period of sample collection. The processes or sources associated with the principal components obtained during the different sampling periods are highly localized and contributed mainly by anthropogenic sources. Hierarchical CA grouped the nine locations into three based on the water characteristics during each period of sample collection. Hierarchical CA and PCA did not give a clear trend in temporal distribution of the parameters. As a result it was difficult to determine a constant similarity between locations during these periods however, DA showed EC and TDS were the only good predictors or discriminant variables in all the locations during the period of investigation.
  S.E. Elaigwu , V.O. Ajibola and F.M. Folaranmi
  Atmospheric pollution from municipal refuse dumps and vehicular traffic are matters of growing interest, often leading to temporary restrictions in urban areas. This study aimed at evaluating bioaccumulation and effects caused by airborne pollutants from refuse dumps. Specimens of the moss Funaria capsularis collected in five sites in the urban areas of Zaria and Kaduna, Nigeria and trace metals (cadmium, chromium, copper, iron, lead and zinc) were measured. The overall results of this exploratory study suggest the utility of F. capsularis as a lower plant for biomonitoring the environmental impact of atmospheric pollution in urban areas. The impact of these dump sites on surrounding soils was also studied.
  M. Haliru , V.O. Ajibola and E.B. Agbaji
  The uptake of some trace elements namely, chromium, nickel, cadmium and lead by some vegetables commonly irrigated were studied under glasshouse conditions. Experiments were conducted in plastic pots using some selected vegetables, lettuce (Lactuca sativa), okra (Abelmoschus esculentus) and pepper (Capsicum annum) grown on sandy loam soils treated with different concentrations of these metals. The treatments investigated include zero application (control), 10, 50 and 100 μg dm-3 metal applications. In general, each plant showed similar growth responses and tolerance but different metal uptake patterns in the same metal contaminated media for eight weeks. The enrichment factor of each metal in the different parts of the vegetables was highly varied. However, the fruits of pepper were more enriched with these metals than the okra fruits. Despite the concentration of metals used, the plants were still capable of controlling the metal uptake, no matter the concentration of metal solution applied to the soil.
  V.O. Ajibola , S.J. Oniye , C.E. Odeh , T. Olugbodi and U.G. Umeh
  The ability of Staphylococcus aureus, Bacteroides fragilis, Bacillus subtilis, Bacillus cereus, Clostridium perfringens, Escherichia coli and Peptostreptococcus spp. to reduce and stabilize textile effluents containing predominantly indigo blue was carried out. The primary objective was to reduce the colour of the effluent to an intensity that complies with the Environmental Protection Agency limits for discharge to surface water. Maximum color removal was achieved with anaerobic biodegradation during 45 days of incubation, while aerobic degradation took 90 days. It was found that Peptostreptococcus spp. among the anaerobes and E. coli among the aerobes ranked best among the bacteria strains used. In general however, aerobic microbes do not have the ability to substantially decolorize the textile effluent but the converse applies to anaerobic microbes. This result shows that the sequential use of both can completely decolorize effluents containing indigo dye.
  V.O. Ajibola , O.A. Babatunde and S. Suleiman
  Loss in vitamin C contents of some fruit juices namely, orange, lemon, lime, pineapple, paw-paw and carrot stored under different conditions was investigated. The juice from the fruit samples were extracted, stored at room temperature (29±1°C) in plastic bottles and in the refrigerator (4±1°C) for 4 weeks. The juices were all analysed for their vitamin C content by oxidation and reduction method. Results revealed that the rate at which vitamin C is lost during storage depends on the type of fruit and the storage method employed. The citrus fruits were found to follow a similar pattern of loss, while other fruits differ from this and among themselves. Loss of vitamin C correlated with pH only for pineapple, pawpaw and carrot, however, this cannot be said to be the controlling factor. Bacillus subtilis and Candida sp. were isolated from all the juices under both storage conditions, except for orange juice.
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