Phytoremediation of contaminated soils containing gasoline using Ludwigia octovalvis (Jacq.) in greenhouse pots.
Greenhouse experiments were carried out to determine the phytotoxic effects on the plant Ludwigia octovalvis in order to assess its applicability for phytoremediation gasoline-contaminated soils. Using plants to degrade hydrocarbons is a challenging task. In this study, different spiked concentrations of hydrocarbons in soil (1, 2, and 3 g/kg) were tested. The results showed that the mean efficiency of total petroleum hydrocarbon (TPH) removal over a 72-day culture period was rather high. The maximum removal of 79.8 % occurred for the 2 g/kg concentration, while the removal rate by the corresponding unplanted controls was only (48.6 %). The impact of gasoline on plants included visual symptoms of stress, yellowing, growth reduction, and perturbations in the developmental parameters. The dry weight and wet weight of the plant slightly increased upon exposure to gasoline until day 42. Scanning electron microscopy (SEM) indicated change to the root and stem structure in plant tissue due to the direct attachment with gasoline contaminated compared to the control sample. The population of living microorganisms in the contaminated soil was found to be able to adapt to different gasoline concentrations. The results showed that L. octovalvis and rhizobacteria in gasoline-contaminated soil have the potential to degrade organic pollutants.
School of Environmental and Natural Resource Sciences, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia. asian.almansoory@yahoo.com.|Department of Biology, Science College, Basrah University, Basrah, Iraq. asian.almansoory@yahoo.com.
Asia Fadhile
AF
Al-Mansoory
Tasik Chini Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
Mushrifah
M
Idris
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
Siti Rozaimah Sheikh
SRS
Abdullah
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
Nurina
N
Anuar
D001673:Biodegradation, Environmental; D005742:Gasoline; D006838:Hydrocarbons / Q000378:metabolism; D029594:Onagraceae / Q000378:metabolism*; D059392:Petroleum Pollution; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism*
D005742:Gasoline; D006838:Hydrocarbons; D012987:Soil; D012989:Soil Pollutants
Gasoline-contaminated soil; Ludwigia octovalvis; Phytoremediation; SEM; TPH