Plant Soil Environ., 2019, 65(9):463-469 | DOI: 10.17221/322/2019-PSE

Assessment of plants for phytoremediation of hydrocarbon-contaminated soils in the Sudd Wetland of South SudanOriginal Paper

Jane Alexander Ruley*,1,2, John Baptist Tumuhairwe1, Alice Amoding1, Emmanuel Opolot1, Hannington Oryem-Origa3, Twaha Basamba1
1 Department of Agricultural Production, Makerere University, Kampala, Uganda
2 Department of Agricultural Sciences, University of Juba, Juba, South-Sudan
3 Department of Natural Sciences, Makerere University, Kampala, Uganda

Hydrocarbon contaminants have become a global concern due to their long-term adverse effects on soil ecosystems and human health. Successful implementation of phytoremediation to clean up hydrocarbon contaminants requires the identification of the most effective remediation plant species. Twelve native plant species of the Sudd Wetland in South Sudan were evaluated for their potential application as phytoremediators. The treatments included six total petroleum hydrocarbon (TPH) concentrations of 0, 25, 50, 75, 100 and 125 g/kg soil. The twelve native plant species tested were: Sorghum arundinaceum Desv., Oryza longistaminata A. Chev. & Roehrich, Hyparrhenia rufa Nees, Abelmoschus ficulneus L., Gossypium barbadense L., Nicotiana tabacum L., Sorghum bicolour L. Moench, Eleusine coracana Gaertn., Capsicum frutescens L., Zea mays L., Tithonia diversifolia Hemsl. and Medicago sativa L. Significant differences in phytoremediation rates were observed amongst the treatments with exception of the 125 g/kg soil concentration of hydrocarbon that was lethal to all the plant species. Over 50% TPH reduction in the 75 g/kg soil concentration was observed in contaminated soil phytoremediation in H. rufa, G. barbadense, O. longistaminata, T. diversifolia and S. arundinaceum, making them potential phytoremediators of hydrocarbon-contaminated soil in the Sudd-Wetland of South-Sudan.

Keywords: crude oil; soil contamination; toxicity; seed germination; Sudd native plants

Published: September 30, 2019  Show citation

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Ruley JA, Tumuhairwe JB, Amoding A, Opolot E, Oryem-Origa H, Basamba T. Assessment of plants for phytoremediation of hydrocarbon-contaminated soils in the Sudd Wetland of South Sudan. Plant Soil Environ. 2019;65(9):463-469. doi: 10.17221/322/2019-PSE.
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