Water Pollution Scenario at River Uramurukwa Flowing Through Owerri Metropolis, Imo State, Nigeria (Published)
Pollution scenario of water from River Uramurukwa was investigated. In both rainy and dry season, 5 water samples each taken from different points were analysed to determine physico-chemical parameters and heavy metals (using Atomic Absorption Spectrophotometer). The investigated physico-chemical parameters for both dry and rainy season respectively ranges from: temperature (32-32.4oC, 29-29.8oC), electrical conductivity (15.67-2.00 µS/cm, 7.31-61 µS/cm), pH(5.2-5.7, 5.9-6.7), total dissolved solids (2.67-3.98 mg/L, 3.29-5.33 mg/L) and TSS (4.43-6.64 mg/L,4.88-5.84 mg/L). The analysed major ions were: sodium (Na+)(1.30-1.67 mg/L, 1.76-2.38 mg/L), potassium (K+)(0.819-0.898 mg/L, 0.08-1.89 mg/L), magnesium (Mg2+)(1.13-2.78 mg/L, 1.23-2.86 mg/L), calcium (Ca2+)(22.92-24.6 mg/L, 13.9-43.9 mg/L), nitrate (NO3–)(0.91-0.96 mg/L, 0.56-0.97 mg/L), phosphate (PO43- )(0.34-1.65 mg/L, 1.07-2.17 mg/L) and sulphate (SO42-)(23.4-24.8 mg/L, 21.02-29.18 mg/L). The investigated heavy metals were: lead (Pb), zinc (Zn)(1.2-2.63 mg/L, 1.60-3.33 mg/L), copper (Cu)(0.13-0.79 mg/L,0.001-0.61 mg/L), iron (Fe)(0.091-0.19 mg/L,0.017-1.97 mg/L), cadmium (Cd)(0.002-0.180 mg/L, 0.002-0.025 mg/L), manganese (Mn)(0.08-1.02 mg/L, 0.008-0.091 mg/L). Temperature, Ec, DO,TDS and TSS were found to compile with WHO guidelines for domestic drinking water except for pH. Cu, Mn, Fe, in the water samples were all within the recommended guidelines of FEPA and WHO for domestic water use. High concentrations of Cd, Mn and Fe were observed at point 2 while all points for Zn and Pb exhibited high concentration. Water quality Index showed the area is unpolluted and safe for use. No ecological risk was observed except for Cd and Pb. PLI was all within recommended limit except for point 2 during the dry season. It should be observed that the River is polluted with Cd and Pb, this are highly toxic metals which can cause serious health damages even at low concentration.
Assessment of Some Selected Automated Teller Machines in Kaduna Metropolis for Pathogenic Bacteria Contamination (Published)
Selected Automated Teller Machines in Kaduna Metropolis were assessed for pathogenic bacteria contamination. Pathogenic bacteria such as Escherichia coli, Pseudomonas aeruginosa, Shigella dysenteriae, Salmonella typhimurium, Staphylococcus aureus and Klebsiella pneumonia were isolated using standard methods. Kano Road and Ahmadu Bello Way had the highest number of isolates as well as sample size because of the concentration of the banks around these roads and the influx of people within and around this area who do business on a daily basis. K. pneumoniae had the largest percentage of isolates with 46 (23.0%), followed by S. dysenteriae with 37 (18.50%). S. aureus, S. tyhimurium, and P. aeruginosa had 33 (16.50%), 32 (16.0%) and 29 (14.5%) respectively while E. coli had the smallest percentage of isolates with 22 (11.0%). The correlation coefficient (r) of 0.60 obtained showed that there is a strong relationship between the isolated pathogenic bacteria and the Automated Teller Machines.
This study evaluates the physico-chemical properties of groundwater in Ogbia, Bayelsa State, Nigeria. Standard field and laboratory methods were followed. The results of the study revealed that the pH value ranges from 6.4 to 7.1 with an average of 6.86 indicating a slightly acidic condition. The concentration level of iron in the study area ranges from 0.1mg/l to 4.2mg/l with a mean value of 1.89mg/l. 13.3% of iron in sampled locations satisfy the World Health Organization (WHO) and Nigerian Standards for Drinking Water Quality (NSDWQ) highest desirable level of 0.3mg/l. The concentration of calcium ranges between 3.0mg/l to 13.1mg/l, with a mean value of 8.83mg/l, while magnesium concentration was from 1.8mg/l to 9.0mg/l, with a mean value of 5.6mg/l. The concentration level of phosphate in the study area ranges from 0.02mg/l to 0.19mg/l, with a mean value of 0.12mg/l. Chloride concentration level in the sampled locations was between 10mg/l to 39mg/l, with a mean of value of 23.8mg/l, all the values recorded were within the permissible WHO and NSDWQ standard of 250mg/l. The low concentration level of chloride in the area indicates that there is no salt water intrusion, hence all the locations have freshwater. The cations were in order of abundance as Na+ > Ca 2+ > Mg 2+ > Fe 2+ > Mn 2+, while anions were in the order of abundance as SO4 > Cl > NO3 > F > NH3 > PO4. Piper Trilinear Diagram for the study area showed that there were mixtures of two types of water with variable concentrations of major ions. These were sodium-chloride type and sodium- sulphate type of water, an indication that the water was from a marine source. Based on the result from this study, there is the need for regular ground water quality monitoring and effective management strategies in the area.
Since petroleum production began, pollution of natural environments by crude oil and its products had been devastitating; exposure of microorganisms to the crude oil contamination could have some measurable effects on soil microbial community and in turn alter soil fertility. This study therefore focused on the response of fungi to diesel oil contamination in a soil. Soil samples (3kg weight) were contaminated with 90ml, 180ml, and 270ml volumes of diesel oil; uncontaminated soil (0ml volume) served as control. Microbiological analysis of the soil samples was carryout on saboraud dextrose agar and mineral salts oil ager at days 1, 7, 14 and 21 intervals after addition of diesel oil to the soils. Mean counts of heterotrophic fungi (X103CFU G-1 soil) were: 0ml, 7.0, 90ml, 4.5, 180ml, 4.5, and 270ml, 4.0. Mean densities of hydrocarbon-utilizing fungi (X102CFU G-1 soil) for 0ml, 90ml, 180ml, and 270ml soil options were: 5.0, 3.5, 6.8 and 3.0 respectively. Fungal organisms isolated include Aspergillus niger, Aspergillus species, Fusarium species, Mucor species, Rhizopus species and Saccharomyces species, which occurred in control soil and polluted soils but Mucor species did not occur in 90ml soil option. The study showed that heterotrophic fungi responded negatively to addition of diesel oil to soil while hydrocarbon-utilizing fungi showed both positive and negative response depending on the volume of diesel added to soil. Occurrence of fungal organisms in polluted soils explained the fact that fungi are capable of utilizing diesel oil and can be used in cleanup operations in crude oil spillage sites.
Trace metal contamination at 4 selected auto workshops at cape coast Ghana has been ascertained in this study. A total of 18 soil samples from auto-repair workshops and 44 soil samples from control sites were sampled and analyzed using energy dispersive x-ray fluorescence technique (EDXRF). Heavy metals like Fe ,Cu, Zn ,Cr, Pb and Mn were analyzed .Mn concentrations were between 364.6713g/g and 1934.063g/g. Cu concentrations were between 42.33g/g and 299.36g/g, Zn concentrations fell between 67.08g/g and 544.26g/g, Cr concentration were between 93.54g/g and 1266.23, Ni concentrations were between75.89g/g and 217.52, Pb concentrations were also between 73.89g/g and 713.65g/g, Fe concentrations were between 21485g/g and 47317.50g/g, which is below its natural occurrence. The enrichment factor (EF) was also used to identify possible levels of contamination from anthropogenic sources. Mechanical shop, Spraying shop, Wielding shop and Electrical shop were contaminated with Fe, Ni, Cu and Mn.
Hydrochemistry and Sanitary Risk Assessment of Domestic Hand-Dug Wells in Ado-Ekiti, Southwestern Nigeria (Published)
This research focused on hydrochemistry and sanitary risk assessment of domestic hand-dug wells in Ado-Ekiti, southwestern Nigeria with a view to improve/ensure the safety of the drinking water supply in the study area. To carry out the sanitary risk assessment, all the hazards and hazardous events that can affect the safety of water supply from the shallow wells through treatment and distribution to the consumers’ point of use were identified and evaluated. Subsequently, 30 water samples fairly spread over the catchment area were taken and analyzed for chemical constituents employing Atomic Absorption Spectrometer for the cations and ion chromatography for the anions. E-coli of another set of the 30 water samples were determined using standard method. Result of the sanitary survey revealed that 14 of the sampled wells were at high risk with 13 and 3 of them in intermediate and low risk respectively. The hydrochemistry of the groundwater revealed that most of the wells in the study area were at risk of contamination as indicated by the high chemical concentrations of NO3- (>50mg/L) and Cl-(>250mg/L) in 43% and 70% of the sampled water respectively. All other chemical parameters have concentrations within approved WHO standard for drinking water. E-coli were present in 90% (27out of 30 samples) of the water samples and this clearly support the sanitary survey of which 27 of the sampled well water fell into high to intermediate risk category. The study indicated that 90% of the wells in the study area are at risk of contamination. High concentrations of NO3- and Cl- from hydrochemical evaluation of the well water as well as presence of e-coli in 90% of the water indicated that the sources of pollution are from anthropogenic sources related to human and animal wastes at close proximity to wells. Safety of the water from the hand dug wells can be improved if health education is intensified in the area.
Quantifying the Productivity of Spent Oil Contaminated Soil Amended With Organic Wastes Using Productivity Index in Abakaliki, South Eastern Nigeria (Published)
A study on quantifying the productivity of spent oil contaminated soil amended with organic wastes using productivity index (PI) was carried out at the Teaching and Research Farm of the Faculty of Agriculture and Natural Resources Management, Ebonyi State University, Abakaliki. The study involved a modification of Pierce et al. productivity index model with simultaneous exclusion of sufficiencies for aeration and electrical conductivity. The applicability and validity of the modified Pierce et al. productivity index model were determined using maize as a test crop. Result showed highly significant (r=0.96 at P<0.01) relationship between PI and grain yield of maize. The general mean PI and grain yield of maize were 0.32 and 0.94 tha-1for the treatments. The mean productivity indices with grain yield of maize were 0.20 and 0.50tha-1, 0.40 and 1.2otha-1, 0.26 and 0.80 tha-1 and 0.42 and 1.3tha-1 for control, burnt rice husk dust, unburnt rice husk dust and saw dust amended soils, respectively. The burnt rice husk dust which had highest prediction of 0.58 also predicted highest grain yield of maize of 2.2tha-1. The grain yield of maize followed productivity index predictions. Organic wastes could be recommended for attenuating problem of spent oil contamination of soil in Abakaliki.