Implication of roasting goats with tyre on human health and the environment in Abakaliki metropolis, Ebonyi State was reviewed in this study. Tyre has 45.49, 40, 0.23 and 1.17% composition for carbon black, zinc oxide, wax and sulphur toxic materials which could pose health threats to human being and the environment. Most of the butchers in Abakaliki and its environs roast slaughtered goats with scrap car tyres. Scraped soot from the roasted goats have significant (P<0.05) high levels of 5.40, 96.10, 38.03 and 61.00 mg kg-1 heavy metal residues for pb, Zn, Cu, and Fe which are washed into the soil, water bodies and air that cause their contamination. These heavy metals concentrations are higher than maximum permissible limit (MPL). Appropriate laws should be made and enforced in Ebonyi State to stop local butchers from using tyres as roasting materials. Scraped soot should also be disposed off safely as is done elsewhere in order to reduce the risk of contamination of soils, water bodies and air with heavy metals in Abakaliki metropolis of Ebonyi State.
Remediation of crankcase oil contaminated soil with different sources of manure was studied using randomized complete block design with four treatments which were replicated five times. Oba super ∏ hybrid variety of maize was used as a test crop. Results showed significant (P<0.05) treatment effect on aggregate stability, gravimetric moisture content (GMC), available phosphorus, calcium and cation exchange capacity (CEC) as well as plant height and grain yield of maize relative to control. Significantly (P<0.05) higher aggregate stability, GMC, Calcium and CEC were obtained in plots receiving a combination of poultry droppings and NPK fertilizer compared to other sources of manure and control. Aggregate stability, GMC, Ca, CEC and organic carbon were higher by 12, 47, 75, 66 and 20% respectively in plots amended with combination of poultry droppings and NPK fertilizer when compared to the control. Grain yield of maize was 44, 36 and 40% higher in plots amended with combined poultry droppings and NPK fertilizer compared to the control, poultry droppings and NPK fertilizer amended plots. Remediation of crankcase oil contaminated soil could be achieved through manure amendment for increased and sustainable productivity.
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