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Role of Pentaclethra macrophylla Benth in crude oil-polluted soil remediation

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Oyedeji A. A., Oyedeji O. F., Immanuel O. M.
World News of Natural Sciences
|
2024
|
vol. 53
74-85
EN
ABSTRACT This study evaluated the role Pentaclethra macrophylla plays in the bioremediation of crude oil-contaminated soil in a controlled environment. Viable seeds P. macrophylla were planted in plant bags containing 3000 of clay-loamy soil to which varying amounts (0, 25, 50, 75 and 100 ml) of crude oil were added. Plant growth parameters (plant heights, girths, number of leaves, nodulation and germination rate) and soil physicochemical parameters (pH, organic matter, sodium, potassium, calcium, magnesium phosphorous, and nitrogen) were determined using standard methods. Results showed that the germination rate of P. macrophylla reduced progressively, 68%, 68%, 52%, 47% and 38% in that order, with increasing concentrations of crude oil, 0 ml, 25 ml, 50 ml, 75 ml and 100 ml. A similar pattern was observed for plant height, 16 weeks after planting, with values 52.80cm, 43.50 cm, 42.60 cm, 42.50 cm and 35.80 cm in that order; 0.37 mm, 0.26 mm, 0.24 mm, 0.22 mm and 0.21 mm in that order for girth; 15, 10, 8, 8 and 2 in that order for number of nodules and 16.00, 14.00, 14.00, 11.00 and 8.00 in that order for number of leaves. The physicochemical characteristics of the soil decreased corresponding to the concentration of crude oil, from 0-100 ml. Nevertheless, the plant exhibited the capability to endure the suppressive effect of crude oil with recorded relative growth rates ranging from 0-0.23 and percentage growth suppression of 0.00% - 32.20%. Being a native nitrogen-fixing plant, P. macrophylla could be utilised for the bioremediation of crude oil-contaminated soil in the Niger Delta.
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Trace metal, FTIR and phytochemical analysis of Viscum album leaves harvested from Pentaclethra macrophylla

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Chizoruo I. F., Onyekachi I. B., Ebere E. C.
World News of Natural Sciences
|
2019
|
vol. 25
61-71
EN
The leaves of mistletoe (Viscum album) harvested from oil bean tree (Pentaclethra macrophylla) in Imo State South Eastern Nigeria was studied. The study was aimed at carrying out trace metal, Fourier Transform Infra-red (FTIR) and phytochemical analysis of ethanol leave extracts of Viscum album harvested from Pentaclethra macrophylla. The sample for trace metal analysis was digested with a mixture of concentrated HNO3 and HClO4 at a ratio of 1:1 for 24 hours. Ethanol was then used to extract the sample meant for FTIR and phytochemical analysis. Herein, trace metal determination indicates the presence of Mg, Zn, Fe, Cu and Cr, and the concentration of Ca and Mn is at < 0.00 mg/kg. The result of the phytochemical screening demonstrates the presence of flavonoids, alkaloids, phenols, saponins and tannins. FTIR analysis confirmed the presence of alcohols, amides, aromatics and carbonyl compounds in ethanol extracts of Viscum album harvested from Pentaclethra macrophylla. The presence of some trace metals and phytochemicals, as well as some important functional groups in the plant sample, as indicated by the result of the study, authenticates its use in traditional medicine.
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