Tag Archives: Heavy Metals

Levels of Some Heavy Metals in Tissues of Crustaceans (Callinectes Amnicola and Macrobrachium Vollenhovenii) From a Tropical Ecosystem in Nigeria (Published)

Levels of Lead, Cadmium and Mercury were assessed in tissues of Callinectes amnicola and Macrobrachium vollenhovenii sampled for twelve months from the Cross River Estuary, Nigeria with the aim of evaluating their potential ecological risk. Results of analysis with Atomic Adsorption Spectrophotometry showed that for C. amnicola, Pb ranged from 0.02-0.19µg/g, Cd 0.01-0.049µg/g and Hg 0.01-0.071µg/g; for M. vollenhovenii, Pb ranged from 0.019-0.098µg/g, Cd 0.0085-0.04µg/g and Hg 0.01-0.058µg/g. Paired t-test showed no significant seasonal disparity (P>0.05) for both crustaceans. Observed linear relationships were expressed as y = 0.4825x 0.0137, y = 0.5661x+0.0053 and y = 0.6111x+0.0059 for Pb, Cd and Hg respectively. Also, the correlation coefficient of Pb (r= 0.87), Cd (r=0.78) and Hg (r=0.803) showed significant concentration relationship between the two studied crustaceans. Although the results of this study show minimal toxicity of shellfish in Cross River estuary, continuous surveillance and assessment were recommended for sustainable ecosystem management.

Keywords: Heavy Metals, crustaceans, tropical ecosystem

Assessment of Heavy Metals Contamination of Surface Water and Sediment of a Tropical Manmade Lake Southwestern Nigeria (Published)

Developing countries including Nigeria are faced with increase generation of domestic, industrial, and agricultural wastes that enter into the surrounding water bodies; and pollutants settle on the sediment (the ultimate sink of contaminant in aquatic environment). These large amount of chemical substances (including heavy metals) released into aquatic environments has put it at risk which could inadvertently pose serious public health hazard. This study assessed the heavy metal concentrations of the surface water and sediments of Dandaru Reservoir, in Ibadan, Nigeria. The level of contamination of lake water and sediment were use to determine the degree of pollution and its potential effects on the environment and public health. Physical and chemical parameters and heavy metals were determined in the lake water using standard methods from April, 2015 to March, 2016 at five different sites of human activities. The physico-chemical parameters determined were within the limits specified by NESREA and WHO.  All metals that were assessed were present in water and sediments (except nickel which was not determined in sediment). Metal concentration in the water followed the following trend Mn,>Fe>Pb>Ni>Zn>Cu>Co>Cd>Cr. Also, metal accumulation in sediments was Fe>Zn>Mn>Pb>Cu>Co>Cd>Cr. The average Igeo class for the sediments in all the stations was 0-2 indicating uncontaminated to moderately contaminated levels.  The concentrations of Pb, Cd, Ni and Mn in water exceeded the NESREA AND WHO standards for domestic water use and aquatic life. These could have adverse effects on the environment and health of people that utilize the water and fish of the Dandaru Reservoir.  Effective monitoring of the livelihood activities and discharges into the reservoir are recommended to prevent further deterioration of the reservoir.

Keywords: Contamination factor, Dandaru Reservoir, Geo-accumulation Index, Heavy Metals, Sediment

Physico-Chemical, Heavy Metal and Microbiological Concentrations in Soil and Water Samples around Veritas University Campus, Obehie, Southeastern Nigeria (Published)

This study aims at evaluating the physico-chemical, heavy and microbiological concentrations in soil and water samples around Veritas University, Obehie, Abia State, Nigeria to prevent the risk on the public health. Standard sampling and analytical methods were employed during the study.  Results of the study revealed that the concentrations of heavy metals in borehole water samples were low (mostly < 0.001), and hydrocarbon were also below detection limit in all borehole samples. The concentrations of heavy metals in surface water were also low, ranging from < 0.001 mg/l in some cases, with the highest single value being 0.165mg/l for iron. Total hydrocarbon content was also below detection levels in surface water showing unpolluted conditions. Heterotrophic bacteria densities were high in soil samples, ranging from 1.0 x 104 to 3.5 x 105 cfu/g soil. Densities of heterotrophic fungi were high in some locations, ranging from 1.0 x 103 to 1.5 x 105 cfu/g. Counts of petroleum degrading bacteria and fungi were generally high. Percentage petroleum degrading bacteria and fungi were greater than 1 % in all samples, except at one location. Microbial populations of soils particularly high in petroleum degraders (> 1 %) show that the soils have been exposed to contamination from petroleum products. High counts in some of the samples indicate normal microbial growth and activities. Heterotrophic bacteria and fungi contribute to good quality soil in terms of fertility. The quality of the borehole and surface water quality is fairly good hence, regular monitoring of water quality in the area is very necessary.

Keywords: Borehole, Heavy Metals, Obehie, Pollution, Soil Microbiology, Surface water

Assessment of the Excretion Levels of Heavy Metals Through the Litters of Chickens Fed Varying Prepared Concentrations of Selected Heavy Metals in Their Feeds (Published)

Studies were carried out to assess the excretion levels of selected heavy metals (Pb, As, and Cd) through the litters when varied prepared concentrations (10ppm, 20ppm, 30ppm) of the metals were administered to the poultry chickens ( Broilers and Layers) for eight weeks period. The poultry litter samples were digested accordingly and spectrometric analysis was followed. The analysis indicated that heavy metals once ingested into the system are not easily excreted. This bio-accumulative capability of the heavy metals in the specific organs in the body system underpines their reactivity and toxicity. The mean excretion level of the selected heavy metals in the litters was in the following decreasing order: As> Pb> Cd. Finally, the study observed that increased exposure of poultry chickens to heavy metals in the environment also increases the risk of its bioaccumulation and biomagnifications in the system.

Keywords: Bioaccumulation and Poultry Chickens. ________________________________________, Heavy Metals, Poultry litters

Environmental Impact of Microbes on Awba Dam: It’s Effect on Ecotourism (Published)

Recreational use of water is often given inadequate consideration and care. This is of particular concern as the recreational use of water is becoming  popular in Nigeria . Many of these are increasingly contaminated by domestic sewage and industrial effluents. This study is therefore relevant in assessing the environmental impact of microbes on ecotourism in Awba dam. A total of nine water (n=9) and soil (n= 9) samples were collected at entry, middle and the end of the Awba dam for heavy metal analysis and microbial assay. Samples were assessed for heavy metals using an official procedure and atomic absorption spectrophotometry. Total aerobic plate count, Isolation and characterization of strains was done using standard methods. For enumeration of E. coliO157:H7, colonies were characterized using standard methods. The direct slide agglutination technique was utilized for serology. The presumptive E. coli isolates  were subjected to agglutination tests with specific E. coli O157:H7 . For the antibiotic sensitivity test, the Bauer-Kirby disc diffusion method was used to test the sensitivity of the isolates. Statistical analysis of ANOVA was used  and Duncan multiple range test was used to separate the means. All the values obtained for the total aerobic count and total coliform count for soil and water  were higher than EPA recommended value for recreational waters. For the antibiotic Sensitivity Profile, isolates from Awba dam showed the highest sensitivity (16.17mm) to ciprofloxacin while lowest was with Augmentine (8.25mm).Furthermore the isolate from the control point showed highest sensitivity to  CPR and NIT ( 14mm) and least for AUG (5mm) Generally, E.coliO157:H7 isolates were highly sensitive to Oflatoxin and Ciproflaxin(93.3%) while the isolate was completely resistant to Ampicilin and Cefuroxime.  The presence of E.coliO157:H7 in the dam can make the dam unfit for recreational activities and also for the community household chores, if not well treated . The University management should device means of controlling waste water that enters into the dam by providing alternate channels of discharge .This will reduce the growth and spread of the microbes in the soil and water of the dam.

Keywords: E. coli O157:H7, Ecotourism, Heavy Metals, Microbes, Physico-chemical parameters, Total Coliform Count

Human Activities and Heavy Metal Concentrations in Aba River, Abia State, Nigeria (Published)

Water samples were collected from seven different locations along the Aba River close to various human, industrial, commercial and domestic activities. The heavy metals were analyzed using the Atomic Absorption Spectrometer (AAS). The result revealed that the concentration of some heavy metals like Iron, Copper, Manganese and Chromium are above the WHO and FMEnv Standard limits for surface water. These high values could be attributed to indiscriminate disposal of wastes into the river. The various parameters of the water samples from the control site (Okpu-Umuobu) were significantly different from those of locations close to the major industrial/commercial activities. This confirms the impact of human activities on the quality of the Aba River. The impacts of dredging and sand mining in and along the river bank were obvious. These activities have an adverse effect on the environment and ecology, speeding up flow and potentially increasing the risk of flooding downstream. This also has the potential to damage ecology by directly affecting its physical habitat, disrupting riverine processes and reduced connectivity with the floodplain. It is therefore recommended that effluent treatment plants be installed to treat waste generated before they are discharged into the stream as well as regular monitoring of the River should be encouraged by the regulatory bodies.

Keywords: Aba River, Anthropogenic Activities, Dredging, Effluents, Heavy Metals, Pollution

Environmental Impact of Microbes on Awba Dam; Its Effect on Ecotourism (Published)

Recreational use of water is often given inadequate consideration and care. This is of particular concern as the recreational use of water is becoming  popular in Nigeria. Many of these are increasingly contaminated by domestic sewage and industrial effluents. This study is therefore relevant in assessing the environmental impact of microbes on ecotourism in Awba dam. A total of nine water (n=9) and soil (n= 9) samples were collected at entry, middle and the end of the Awba dam for heavy metal analysis and microbial assay. Samples were assessed for heavy metals using an official procedure and atomic absorption spectrophotometry. Total aerobic plate count, Isolation and characterization of strains was done using standard methods. For enumeration of E. coliO157:H7, colonies were characterized using standard methods. The direct slide agglutination technique was utilized for serology. The presumptive E. coli isolates  were subjected to agglutination tests with specific E. coli O157:H7 . For the antibiotic sensitivity test, the Bauer-Kirby disc diffusion method was used to test the sensitivity of the isolates. Statistical analysis of ANOVA was used  and Duncan multiple range test was used to separate the means. All the values obtained for the total aerobic count and total coliform count for soil and water were higher than EPA recommended value for recreational waters. For the antibiotic Sensitivity Profile, isolates from Awba dam showed the highest sensitivity (16.17mm) to ciprofloxacin while lowest was with Augmentine (8.25mm).Furthermore the isolate from the control point showed highest sensitivity to  CPR and NIT ( 14mm) and least for AUG (5mm) Generally, E.coliO157:H7 isolates were highly sensitive to Oflatoxin and Ciproflaxin(93.3%) while the isolate was completely resistant to Ampicilin and Cefuroxime.  The presence of E.coliO157:H7 in the dam can make the dam unfit for recreational activities and also for the community household chores, if not well treated . The University management should device means of controlling waste water that enters into the dam by providing alternate channels of discharge .This will reduce the growth and spread of the microbes in the soil and water of the dam.

Keywords: E. coli O157:H7, Heavy Metals, Physico-chemical parameters, Total Coliform Count

Assessment of the Heavy Metals and Natural Radioactivity in Phosphate Mines and Occupational health effects at some Egyptian Regions (Published)

In this work the specific activities of natural radionuclides namely (238U series, 232Th series and 40K) has been measured in collected sedimentary phosphate deposits samples from El-Hamraween, El-Quser and Safaga phosphate mines in Egypt. HPGe γ-spectrometry were used. This study was undertaken to estimate the radiation hazard indices in phosphate mining at the studied mines on their occupational workers, and to establish correlation relationships between the some measured heavy metals such as As, Cd and Pb in blood workers and their concentration in phosphate rock ores. As well as determination the biomarkers in the blood workers such as malondialdehyde (MDA) and superoxide dismutase (SOD). The phosphate mine sample of El-Hamrawein has the lowest activity concentration of 226Ra, 232Th and 40K in compared to the phosphate mine samples of El-Quseir and Safaga (El-Hamrawein<El-Quseir<Safaga). The activity concentrations of all analyzed investigated radionuclides considerably fluctuated; for 226Ra activity concentrations varied from 222.4 to 255.8 Bq kg1, 122.4 to 188.3Bq kg1and 115.4 to 165.8Bq kg1 for Safaga,El-Quseir and El-Hamrawein, respectively. For 232Th activity concentrations varied from 135.6 to 212.3 Bq kg1, 112.8 to 167.4Bq kg1and 132.8 to 188.6 Bq kg1 for Safaga, El-Quseir and El-Hamrawein, respectively. For 40K activity concentrations varied from 225.2 to 312.8 Bq kg1, 168.7 to 268.9Bq kg1and 95.2 to 155.8Bq kg1 for Safaga, El-Quseir and El-Hamrawein, respectively. The workers of old ages have higher concentration of the investigated heavy metals than young ages. There is a good relation between the concentration of the investigated metals in phosphate mine samples and their concentration in blood of the occupational workers in these mines.

 

Keywords: Heavy Metals, Malondialdehyde, Natural radionuclides, occupational workers. Health effects, phosphate, superoxide dismutase

Assessment of the Effects of Cadmium and Lead on PH and Cation Exchange Capacity of Soil Under Different Plant Canopy in the Tropical Wet-And Dry Climate. (Published)

The effects  of heavy metals  pollution on agricultural produce can not be over emphasize. To estimate the effect of heavy metal on pH and Cation Exchange Capacities of soil on incubation, relationships between availability of metals in soil after contamination  were investigated for a range of soils and metals. Three rates (0 mg/kg, 2 mg/kg and 5 mg/kg) of lead and cadmium were added as nitrate solution as single and combine treatments to six  soil samples under different plant canopy. The soils-metal were incubated at field capacity for 8 weeks under 250C. The exchangeable bases  in soils were determined in IM ammonium acetate (pH 7.0) extract  by FAAS and pH by pH meter with a combination electrode. The treatment is arranged in randomised complete design each in triplicates. The pH decreased from 7.02 to 6.70 and 6.63. Cation Exchange Capacities decreased from range of of 6.62 to range of 4.71 and 3.10 C mol kg-1 under single and combined treatments respectively for the six locations. These results enable us to understand natural attenuation of metal contamination and also to assess the risk of soil contamination by determining effects of metals reactions with CEC and pH  in 8-weeks incubated soils after artificial contamination.

Keywords: Heavy Metals, Incubation process, pH and CEC

Heavy Metal Contamination of Top Soil at Auto-Repair workshops in Cape Coast, Ghana (Published)

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.

Keywords: Concentration, Contamination, Energy Dispersive X-ray Florescence, Enrichment Factor, Heavy Metals

Proximate and Elemental Analysis of Some Nigerian Coal Deposits (Published)

Studies were carried  out on the proximate and elemental contents of coal deposits in three Nigerian States (Enugu, Benue and Delta) employing standard laboratory procedures and instrumentation. The fixed carbon and ash contents of Benue and Enugu coal samples deposits were found higher than Delta coal deposits. Heavy metals like arsenic, lead and cadmium were present at higher concentrations in Delta coal sample deposits than in the other coal sample deposits studied. Trace mineral contents of Enugu coal deposits were found to be higher than others implying that it is of higher economic value.

Keywords: Coal Deposits., Heavy Metals, Trace Metals

Preliminary Assessment of Some Heavy Metals Pollution Status of Lisikili River Water in Zambezi Region, Namibia (Published)

Good water quality is fundamental to human health and sustenance of aquatic ecosystems. The Lisikili river in Zambezi region, Namibia is a major perennial river which serves diverse economic purposes in the host community. However, it is now receiving pollution threat from effluents discharge and surface run-off from large agricultural lands. Eight (8) water samples were collected at 8 random points within a stretch of approximately 2km on each extremity and median parts of the river. Two major economic fish from the river, tilapia fish (Oreochromis niloticus) and cat fish (Siluriformes) (8 samples of each) were collected using fish net at the points of water sampling. The samples were transported to analytical laboratory in ice boxes for processing and analyses for the levels of Pb, As, Cr, Cd, Cu, Zn, Mn and Fe using Inductively Coupled Plasma-Optical Emission Spectrophotometer (ICP: Perkin Elmer Optima 7000 DV). The results obtained showed wide mean concentrations of the heavy metals in the river water; iron recorded the highest level of 2.375 mg/l and arsenic (0.047 mg/l) recorded the lowest level. Apart from Zn (0.259 mg/l) and Cu (0.073 mg/l) with the present concentrations lower than their guideline permissible limits, the mean concentrations of the other heavy metals exceeded their maximum permissible guideline values for the protection of human and aquatic health. Based on the classification of metal pollution index (PI) for water, apart from Cu (PI = 0.03) and Zn (PI = 0.04); all the other heavy metals recorded pollution indices which suggest moderate to strong effect on the river water quality. In both the catfish and tilapia fish (wet weight whole sample), iron (4.926 mg/kg and 3.323 mg/kg) recorded the highest mean concentration while Cd (0.136 mg/kg and 0.078mg/kg) recorded the lowest level respectively. Generally, the present levels of the heavy metals were below their regulatory limits for the protection of human health. However, the fish’s bio-accumulation factors of the metals suggest that they have high potentials to bio-accumulate some of the heavy metals to high levels and this has adverse implication for human consumption. Because heavy metals are non-biodegradable and bio-accumulative in nature which therefore, make their presence in human foods even at very minute levels potential toxins, it is important to monitor their accumulations in the river and fish and advice precautionary measures to limit excessive human exposures to the heavy metals content.

Keywords: Fish, Heavy Metals, Human Health, Pollution, River Water

Environmental Impact of Microbes on Awba Dam; Its Effect on Ecotourism (Published)

Recreational use of water is often given inadequate consideration and care. This is of particular concern as the recreational use of water is becoming popular in Nigeria. Many of these are increasingly contaminated by domestic sewage and industrial effluents. This study is therefore relevant in assessing the environmental impact of microbes on ecotourism in Awba dam. A total of nine water (n=9) and soil (n= 9) samples were collected at entry, middle and the end of the Awba dam for heavy metal analysis and microbial assay. Samples were assessed for heavy metals using an official procedure and atomic absorption spectrophotometry. Total aerobic plate count, Isolation and characterization of strains was done using standard methods. For enumeration of E. coliO157:H7, colonies were characterized using standard methods. The direct slide agglutination technique was utilized for serology. The presumptive E. coli isolates were subjected to agglutination tests with specific E. coli O157:H7 . For the antibiotic sensitivity test, the Bauer-Kirby disc diffusion method was used to test the sensitivity of the isolates. Statistical analysis of ANOVA was used and Duncan multiple range test was used to separate the means. All the values obtained for the total aerobic count and total coliform count for soil and water were higher than EPA recommended value for recreational waters. For the antibiotic Sensitivity Profile, isolates from Awba dam showed the highest sensitivity (16.17mm) to ciprofloxacin while lowest was with Augmentine (8.25mm).Furthermore the isolate from the control point showed highest sensitivity to CPR and NIT ( 14mm) and least for AUG (5mm) Generally, E.coliO157:H7 isolates were highly sensitive to Oflatoxin and Ciproflaxin(93.3%) while the isolate was completely resistant to Ampicilin and Cefuroxime. The presence of E.coliO157:H7 in the dam can make the dam unfit for recreational activities and also for the community household chores, if not well treated . The University management should device means of controlling waste water that enters into the dam by providing alternate channels of discharge .This will reduce the growth and spread of the microbes in the soil and water of the dam.

Keywords: E. coli O157:H7, Heavy Metals, Physico-chemical parameters, Total Coliform Count

Using EF, PLI and Igeo for the Assessment of Heavy Metal Pollution and Sediment Quality of Asejire Reservoir, Southwest Nigeria (Published)

Asejire Reservoir is the largest lake in Southwest Nigeria, supplying domestic and industrial water to more than two million inhabitants of Ibadan and adjoining villages and towns in Oyo and Osun States. A study on the characteristic of sediment quality was conducted to evaluate the heavy metal content of the reservoir. Twenty stations were selected, sampled and analyzed using standard methods.Standard pollution indices such as Igeo, Enrichment Factor, Contamination Factor and Pollution Load Index were deployed to assess the level of heavy metals contamination in the reservoir. The result showed that the sediment was slightly acidic across the study stations, with low conductivity and organic matter content. The heavy metals order of dominance was: Fe>Pb>Cu>Zn>Mn>Ba>Ni>Cr. The mean concentration levels of all the heavy metals were lower than mean background value except Fe and Pb. Analysed data shows that the sediments in the area are rich in Fe with Igeo values > 6, high enrichment and contamination factor. Igeo and CF levels of Pb indicate moderate to no pollution, while other heavy metals indicated low calculated Igeo, EF and CF respectively. The calculated PLI values for all the heavy metals in all the location were < 1, indicating low anthropogenic contamination by these elements and suggesting that the heavy metals were derived mainly from natural sources such as bedrock materials and weathering processes.

Keywords: Asejire, Geo-accumulation Index, Heavy Metals, Pollution Load Index, Sediment

Assessment of Selected Heavy Metal Residues in the Kidney, Liver, Muscle and Gizzard of Chickens Raised Within Enugu Metropolis (Published)

Studies were carried out for possible bioaccumulation of the following heavy metals; Pb, As, Cd, Cr, Hg, Ni, V and Cu in the internal parts (kidney, liver, gizzard and muscle) of twenty seven (27) local and exotic chickens raised within Enugu metropolis after wet digestion of samples and subsequent use of atomic absorption spectrometer. All the selected heavy metals were found to be present in the studied parts of the chickens although at concentrations within their respective established permissible limits for meats consumption. The internal organs of experimental chickens accumulated heavy metals in the following increasing order: liver > kidney > gizzard > muscle. Except vanadium, the concentrations of all other metals in the studied parts of the chickens showed significance at p < 0.05 from the anova analysis. The mean concentrations of Pb, Cd and Hg were very much higher in the kidney and liver the chickens than other studied metals. The experimental chickens accumulated heavy metals in the following increasing order: local chicken > layer chicken > broiler chickens.

Keywords: Bioaccumulation, Chickens, Heavy Metals, Kidney, Liver

Estimation of the Dietary Intakes of Heavy Metals by Children, Adolescents, Adults and Seniors Consuming Chicken Meats within Awka and Enugu Metropolis and Its Environs. (Published)

This study was carried out to estimate the dietary intakes of heavy metals (Pb, As, Cd, Cr, Hg, Ni, V and Cu) by the inhabitants consuming chicken meats within Awka and Enugu metropolis and its environs. The concentration of the heavy metals were determined in the chicken samples collected from major farms and markets within Awka and Enugu metropolis and its environs. The kidney, liver, gizzard and muscle of chicken samples were analyzed for heavy metal concentrations using flame atomic absorption spectrometer. Heavy metal intakes on daily and weekly basis were determined for the five population groups; children, adolescents, male and female adults and seniors using food frequency questionnaire approach administered to six hundred (600) respondents in the population. The data obtained from the FFQ was subjected to Monte Carlo simulation analysis and mathematical evaluations. The analysis showed that the range of the total mean dietary intake of the heavy metals in mg/kg body weight/wk increased in the following order; seniors, (0.98 – 5.18) > male adults, (0.96 – 5.02) > adolescents, (0.96 – 4.75) > female adults, (0.81 – 4.05) > children, (0.50 – 3.06) The weekly intakes of heavy metals by the five population groups were compared with the established provisional tolerable weekly intakes set for these metals. The total mean dietary intakes of seven of the eight heavy metals estimated were below the established PTW1. On the other hand, the mean dietary intake of mercury by the five population groups consuming chicken liver and kidney exceeded the PTW1 by between 130 to 175.63%.

Keywords: Heavy Metals, PTW1, chicken meats, dietary intake

Accumulation and Contamination of Heavy Metals in Soil and Vegetation from Industrial Area of Ikirun, Osun State, Nigeria (Published)

Samples of soil and vegetation were analyzed for their heavy metal contents using standard methods. Samples were collected around a steel rolling mill along Ikirun, Osogbo road, Osun State. Results of vegetation revealed highest iron concentration (17305.00mg/kg), highest chromium concentration (1088.00mg/kg), highest nickel concentration (303.40mg/kg), and highest lead concentration (38.88mg/kg) at VG 7. Soil analysis showed highest iron concentration at SS3 (29895 mg/kg), highest cobalt concentration at SS6 (510 mg/kg), highest nickel concentration at SS6 (882 mg/kg), highest lead concentration at SS7 (2525 mg/kg) and highest chromium concentration at SS6 (2935 mg/kg). This suggests that the area was grossly contaminated mostly with iron, chromium, lead and nickel especially in soil. Plant concentration factor was in the range 0.03 – 0.63 for iron, 0.10 – 0.62 for cobalt, 0.01 -0.76 for nickel, 0.00002 – 0.02 for lead and 0.09 – 0.95 for chromium. Plant absorption of heavy metals from soil was in the order Cr>Ni>Fe>Co>Pb. Integrated pollution index of soil showed low to extreme high level of pollution. Statistical significant differences were observed between means of heavy metals in study area and control site. Strong positive correlations were observed between pairs of metal in vegetation and pairs of metal in soil. Inter-element correlations were however observed to be weak between the two media. Levels of metals in control sample were not as high as levels obtained at the steel rolling mill.

Keywords: Heavy Metals, Integrated Pollution Index, Plant Concentration Factor, Soil, Vegetation