Abstract
Automobile workshops are the hub of waste oil sources among other sources of pollution with it attendance consequence of physico-edaphic alterations of the terrestrial soil habitat. This research was aimed at reevaluating the demonstrated potential of three hydrocarbon tolerant leguminous species; in view of their application in automobile workshop surroundings. Field and laboratory analysis of the physico-edaphic parameters were carried out using universally acceptable standard methods. Result has recorded enhanced infiltration rate by phytotechnology among Peltophorum pterocarpium (Pp), Leucaena leucocephala (Ll) and Crotolaria retusa (Cr) waste oil soils in the order Pp<Cl<Ll ; in which P. pterocarpum has increased infiltration at lesser time rate of 1.07 ± 0.31, 1.51 ± 0.02, 2.48 ± 0.35 and 3.13 ± 1.45 across levels of treatment with significant difference ( p<0.05 ). This was correspondingly in direct relationship with the significantly enhanced particle size (87.73%) of sand, and 2.61g/cm 3 particle density, reduced bulk density (0.83g/cm 3 ), 68% porosity increase and reduced organic matter content of 2.65%, total hydrocarbon content reduction of 1.8mg/g, high efficiency of 55% hydrocarbon removal, 34.40 bioaccumulation quotient and 24.63% reduction in crusting hazard of sealing recorded. Conclusively, P. pterocarpum can be proposed for automobile workshops as a proactive measure and containment absorbent among other hydrocarbon restoration approach against envisaged waste oil discharge. Keywords: Crusting hazard, total hydrocarbon, root formation, bioaccumulation quotient and particle size. DOI : 10.7176/JEES/9-3-07 Publication date :March 31 st 2019
Highlights
Environmental pollution by hydrocarbon and its products especially with the spent lubricating oil (SLO) or waste engine oil (WEO) has become the most prevalent and major source of diffuse or non-point source of oil pollution to the environment because of its strong toxic properties (Rudko and Rybczynski, 2010; Anna et al, 2015)
It contains a mixture of different chemicals including low to high molecular weight (C) compounds, lubricative additives, and decomposition products with significant levels of hydrocarbons, chlorinated biphenyls, chlorodibenzofurans and other properties present in all petroleum products and heavy metals which have been found to be harmful to the soil biotic and abiotic environmental factors (Dauda and Obi, 2000; Wang et al, 2000; Duffus, 2002; Adedokun and Ataga, 2007; Adu et al, 2015)
The waste oil was obtained from an automobile workshop in Port Harcourt, Rivers State, Nigeria. 2.1.2.Experimental design and pollution of the study micro-sites with waste oil A double split “nested design” plot according to Akindele (1996) was adopted in which a nested analysis of variance procedures
Summary
Environmental pollution by hydrocarbon and its products especially with the spent lubricating oil (SLO) or waste engine oil (WEO) has become the most prevalent and major source of diffuse or non-point source of oil pollution to the environment because of its strong toxic properties (Rudko and Rybczynski, 2010; Anna et al, 2015). It is a common and toxic environmental contaminant not naturally found in the environment (Dominguez-Rosado and Pitchel, 2004) It contains a mixture of different chemicals including low to high molecular weight (C) compounds (mono and multi-grade crankcase oils from petrol and diesel engines), lubricative additives (gear oils and transmission fluids), and decomposition products with significant levels of hydrocarbons, chlorinated biphenyls, chlorodibenzofurans and other properties present in all petroleum products and heavy metals which have been found to be harmful to the soil biotic and abiotic environmental factors (Dauda and Obi, 2000; Wang et al, 2000; Duffus, 2002; Adedokun and Ataga, 2007; Adu et al, 2015). It is usually obtained after servicing and greasing of motor parts and subsequent drainage from engines, changing of lubricating oil, and replacement of worn-out parts and generators by auto-repairers (Anoliefo and Vwioko, 2001; Ajayi, 2005; Sharifi et al, 2007)
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