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Articles by Chukwujindu M.A. Iwegbue
Total Records ( 5 ) for Chukwujindu M.A. Iwegbue
  Chukwujindu M.A. Iwegbue , S.O. Nwozo , E.K. Ossai and G.E. Nwajei
  Concentrations of cadmium, lead, chromium, nickel, copper, manganese and zinc in six brands of fruit drinks was investigated. The concentration of the heavy metals showed appreciable (p<0.05) variability within a brand except for Pb and Zn in orange brand. However, apparent and significant variability exist when brands are compared. The mean levels of the studied metals varies between 2.29-18.29 ppm for Fe, 1.41-7.19 ppm for Cu, 0.002-0.89 ppm for Cr, 0.06-1.93 ppm for Pb, 0.21-1.00 ppm for Ni, 0.006-11.29 ppm for Mn, 0.69-1.25 ppm for Zn and 0.002-0.49 ppm for Cd, the levels of these metals exceeded statutory safe limits except for Mn, Zn and Fe.
  Chukwujindu M.A. Iwegbue , Chukwudumebi L. Overah , Sarah O. Nwozo and Godwin E. Nwajei
  Concentrations of metals (copper, zinc, lead and iron) were examined in some popular brands of canned tomato paste in Nigerian markets with a view of providing information on the risk associated with the consumption of these products. Samples of some popular brands of tomato pastes canned in metallic containers were analyzed for levels of copper, zinc, lead and iron after acid digestion by atomic absorption spectrophotometry. The mean concentrations (mg kg-1) ranged from <0.9-4.28 for Cu, 0.25-10.75 for Zn, <0.3-1.82 for Pb and <1.0-112.8 for Fe. The concentrations of the metals examined in the samples were present at levels below statutory limits in foods except for lead. This may pose a real danger to consumers, since tomato paste is so commonly consumed and bioaccumulation of Pb can have serious consequence to human health.
  Chukwujindu M.A. Iwegbue , E.S. Williams and G.E. Nwajei
  This communication present the results of the determination of total petroleum hydrocarbon content of soil profiles of automobile mechanic waste dumps. The levels of petroleum hydrocarbon in all sites ranged from 486-4438.7, 116.3-433.4 and 54.5-244.2 mg kg-1 for 0-15, 15-30 and 30-60 cm depths, respectively. The concentrations of petroleum hydrocarbon in automobile waste dump sites are relatively high and represent elevated concentrations above background levels found in unpolluted soils. The hydrocarbon concentrations show no relationship with the soil physicochemical characteristics and ages of the dumpsites. Automobile mechanic waste dumps represent a potential sources of petroleum hydrocarbon contamination in soils, sediments, surface water and groundwater in areas remote from oil exploration and production sites.
  Chukwujindu M.A. Iwegbue , A.C Egun , F.N. Emuh and N.O. Isirimah
  One of the main obstacles to the successful utilization of compost in agriculture is the lack of reliable quality criteria and understanding the transformation of organic matter, which take place throughout the whole process. Proper evaluation of composts maturity essential for establishment of such criteria. Because of the diversity of origin of composts. It is impossible to use a single method to evaluate compost maturity. It is best done by a combination of methods. A good index of compost maturity should have an overall trend describable by a monotonic function. Methods for evaluating composts maturity can be categorized into (1) chemical analysis (C/N, CEC and nitrification) (2) physical analysis (odour and temperature) (3) spectroscopic analysis (FTIR and 13C-NMR) (4) plant bioassay (germination and plant growth) (5) chromatographic analysis (sephadex fractionation) (6) degree of humification (HI, DH and HR) (7) microbial analysis (respiration). These tests vary in precision, simplicity, costs, duration and approach. Plant bioassays are considered the most direct test for compost maturity since it shows the effect of compost maturity on plant growth and other maturity tests are correlated with plant growth performance. Spectroscopic methods, sephadex fractionation and degree of humification give an insight to the feasibility of starting material to be transformed, the level of humification and the quality of the humic fraction and the efficiency of a given composting process.
  Francis O. Arimoro , Robert B. Ikomi and Chukwujindu M.A. Iwegbue
  A study of the aquatic oligochaetes of an organically polluted segment of an urban stream in Southern Nigeria was carried out to assess the ecological impact of abattoir effluent. Three stations 1, 2 and 3 were selected from upstream of the site receiving abattoir effluent, the impacted site and its down stream, respectively. Among the water quality variables, conductivity, dissolved oxygen, BOD5, Nitrate-nitrogen, Phosphate-phosphorus and water hardness were significantly different (p<0.05) among the stations. Orthogonal comparison using Duncan’s multiple range test showed that station 2 (the impacted site) was the cause of the difference. A total of 14 species of oligochaetes were identified with 13 (92.8%) occurring in the impacted station. Tubifex, Dero limnosa and Nais communis were the dominant taxa, less frequent were Stylaria, Aelosoma and Lumbriculus variegatus (Muller). Pistina and Chaetogaster species were sporadically present. The density of the different taxonomic groups differed among the stations with the impacted station accounting for the greatest abundance and diversity of the organisms. The organic wastes from the abattoir not only altered the water chemistry but also stimulated the abundance of oligochaete worms.
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