Germination of Seeds of Selected Leguminous Tree Species Moistened with Varying Concentrations of Crude Oil-Contaminated Soil Water Extracts

Abstract

The study investigates the germination of selected leguminous tree species (LTS) native to the forest ecosystem and oil producing areas of Nigeria. Germination experiments of 250 seeds from each of the selected members of the Fabaceae family: Bauhinia monandra (Kurz), Delonix regia (Boj. ex Hook.) Raf. and Tetrapleura tetraptera (Schum. & Thonn.) Taubert were conducted in petri dishes double-layered with Whatman No. 1 filter papers for 10 days and moistened with varying concentrations of crude oil contaminated soil water extracts (0, 25, 50, 75 and 100 ml), with a view to determining the ability of these plants to germinate and establish in soil polluted with crude oil. The mean percentage germination of each tree species was thus determined. All the LTS germinated, but germination was concentration dependent, as percentage germination decreased with increased oil concentrations. Evaluation of the initial growth responses and tolerances of these LTS in oil-polluted soil may provide useful information about the potential of these plant species for phytoremediation.

A Water Purification System using Locally Sourced Materials and Removal of Total Petroleum Hydrocarbon in Contaminated Water

“…However, the availability of water continues to dwindle with increasing exploitation, changing climate, and pollution of sources, all of which have collectively compromised the quality of water for various uses including ecosystem services function, and domestic and commercial usage [1] Water pollution through the spillage of crude oil and its fractions is now an existing problem over the years in various parts of the world and has consequently drawn universal attention in recent years [5]. Surface and groundwater resources contamination via crude oil and related products is now commonplace in the oil-bearing regions of the world [2] A mean value of about 83 million barrels of crude-oil spillage took place yearly between 1994 and 1996 in the United States according to research records; every of this spill contributed about 50,000 barrels of crude oil [3]. According to research, about 9 to 13 million barrels of crude oil were spilled in 2010, and yet during the clean-up exercise, how about 70% of it was not recovered [4].…”

Assessing the Potential of Parkia biglobosa (Jacq.) R.Br. ex. G. Don - A Leguminous Plant Species commonly found in Nigeria to Decontaminate Crude Oil-polluted Soil in Terrestrial Ecosystem

“…The presence of crude oil in the environment has caused several adverse impacts on the environment (Seiyaboh and Izah, 2017;Onwuna et al, 2022), leading to variation in microbial, physiochemical, heavy metal and hydrocarbon content of the soil which in turn may affects the biological components of the ecosystem including microbes, insects, vegetation and wildlife, which in the case of the Niger Delta led to a reduction the productive quality of the terrestrial ecosystem (UNEP, 2011). It also leads to habitat alteration, and death and indirect leading to loss of food resources (Oyedeji et al, 2012;Oyedeji, et al, 2015). The volatile fraction of the crude oil has the tendency to aerosolize be inhaled by humans that reside close to the vicinities of oil and gas operation or where crude oil or its derivatives spill.…”