Abstract This study aims to evaluate the effects of plant density on the degradation of polyaromatic hydrocarbon (PAH) compounds in soils contaminated with crude oil. In this work, Axonopus compressus was applied as a bioremediator given... more
Abstract This study aims to evaluate the effects of plant density on the degradation of polyaromatic hydrocarbon (PAH) compounds in soils contaminated with crude oil. In this work, Axonopus compressus was applied as a bioremediator given its extensive and successful use in phytoremediation. A. compressus was planted at the density of three (pot-3), five (pot-5) or seven (pot-7) plants in pots containing soil contaminated with crude oil at the concentration of 20 g kg−1. Two pots were designated as controls: one containing unplanted soil contaminated with crude oil (pot-C) and one containing uncontaminated soil as control (pot-0). All planted and unplanted pots were irrigated with nutrient solution as needed. This study was performed for 2 months. The degradation of PAH compounds in soil was evaluated through ultraviolet fluorescence technique. Results showed that PAH degradation was enhanced as plant density increased. Specifically, after 2 months, PAH contents decreased by 69%, 75.8% and 82.3% in pot-3, pot-5 and pot-7, respectively, relative to those in pot-C. High plant densities mitigated the adverse effects of crude oil contamination on plant growth. Thus, this study demonstrated that high plant densities promote the phytoremediation of soil contaminated with hydrocarbon compounds.
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well... more
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well diffusion method for 72 hours.
Hydrocarbon contamination is one of the major environmental problems caused by different human activities related to the petrochemical industry. The accidental release of organic pollutants into the environment is a particular concern. In... more
Hydrocarbon contamination is one of the major environmental problems caused by different human activities related to the petrochemical industry. The accidental release of organic pollutants into the environment is a particular concern. In this study, 16 bacterial isolates were obtained from hydrocarbon-contaminated water and soil samples cultured for 48 hours in nutrient agar supplemented with 1% (vol/vol) crude oil. The growth requirements and crude-oil degradation ability of the isolates were determined. Micrococcus spp., Pseudomonas spp. and Bacillus spp. were obtained as common isolates from all of the water and soil samples. Some of the obtained isolates, specifically Micrococcus spp. and Pseudomonas spp., can utilise hydrocarbons as growth substrates in mineral salt medium (MSM) supplemented with type of crude oil, at 1% (vol/vol) concentration. Gas chromatography analysis revealed that Micrococcus spp. and Pseudomonas spp. provided crude oil degradation rates of 58% and 65%, ...
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well... more
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well diffusion method for 72 hours. The outcomes revealed that Balanites fruit contained saponins, tannins, glycosides, flavonoids, and terpenoids; whereas garlic bulbs contained glycosides, sterols, flavonoids, resins, and terpinoids.
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well... more
The phytochemical screening of both products was run following the standard methods. Polar extracts of both B. aegyptiaca fruits and A. sativum bulbs were prepared to test their inhibition activities on E. coli stain through agar well diffusion method for 72 hours.
