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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 20, No. 4, 2016, pp. 1045-1050
Bioline Code: ja16110
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 20, No. 4, 2016, pp. 1045-1050

 en Effect of Giant Rat’s Tail Grass ( Sporobolus pyramidalis p. beauv check for this species in other resources ) on Total Petroleum Hydrocarbon (TPH) and Heavy Metals content of Crude Oil Polluted Soils
CHUKA, DONATUS BELONWU; CLEMENT, ODUMODU & COMFORT, CHINAZA MONAGO

Abstract

Soil contamination by crude oil has been an issue within the oil producing areas of the Niger Delta Nigeria and so, many remediation methods; including phytoremediation, the use of plants, have been adopted for the remediation of the affected soils. Such plants are expected to be safe and effective in the clean-up of hydrocarbons and heavy metals from oil polluted sites. Giant rat’s tail grass ( Sporobolus pyramidalis p. beauv check for this species in other resources ) is among the plants being proposed. This study therefore investigated in eight-weeks, the effects of giant rat’s tail grass (Sporobolus pyramidalis p.beauv) on the total petroleum hydrocarbon (TPH) and heavy metals content of contaminated soils. Residual TPH and heavy metals (chromium, Cr and lead, Pb) were quantified as an index for assessing the post-phytoremediated crude oil contaminated soils. Crude oil pollution levels of 25ml/kg, 50ml/kg and 100ml/kg on soils were respectively done alongside the unpolluted control. Remediation treatments of the test soils and the control with the plant were done after two weeks of pollution using three young seedlings of giant rat’s tail grass. Results from eight weeks remediation period showed that TPH (mg/kg) reduced from 496.55 to 257.90, 578.09 to 241.37, 602.61 to 198.80 and 21.27 to 6.22 on the test soils and the control respectively; Cr (mg/kg) from 5.86 to 1.23, 7.96 to 1.38, 9.76 to 1.65 and 4.26 to 0.63 on the test soils and the control respectively; and Pb (mg/kg) from 4.25 to 1.21, 5.26 to 2.31, 5.12 to 3.93 and 1.96 to 0.43 on the test soils and the control respectively. Soil analysis results from the study indicated that giant rat’s tail grass (Sporobolus pyramidalis p.beauv) has the potential to ameliorate crude oil toxicity at different crude oil contamination levels because of its ability to significantly (p>0.05) decrease the TPH and heavy metals content of the soil.

Keywords
Total Petroleum Hydrocarbon; Heavy Metals; Phytoremediation; giant rat’s tail; crude oil contamination

 
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