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King Fahd University of Petroleum and Minerals. (KFUPM) 2015

INVESTIGATING THE PHYTOREMEDIATION POTENTIAL OF SELECTED SAUDI PLANTS IN REMOVING POLLUTANTS FROM CONTAMINATED WATERS

AKEEM BELLO

Titre : INVESTIGATING THE PHYTOREMEDIATION POTENTIAL OF SELECTED SAUDI PLANTS IN REMOVING POLLUTANTS FROM CONTAMINATED WATERS

Auteur : AKEEM BELLO

Université de soutenance : King Fahd University of Petroleum and Minerals. (KFUPM)

Grade : Master of Science (MS) 2015

Résumé
This study was carried out to demonstrate the phytoremediation potential of two Saudi plant species - Bolboschoenus maritimus and Phragmites australis, in removing selected organic and inorganic pollutants in water. Naphthalene was used as a target organic pollutant while cadmium (Cd), lead (Pb) and nickel (Ni) were used as target inorganic pollutants. The experiments were carried out in a hydroponic medium and 5ppm was used as concentration of each of the heavy metals whereas 10ppm was used as the concentration of naphthalene. The mechanisms employed by each of the plants to carry out the phytoremediation were also investigated as well as the microbial community present in the spiked water and rhizosphere of the plants. The results of the study showed that B. maritimus had a residual of 1% (99% removal) of cadmium, 6% (94% removal) of lead and 17% (83% removal) of nickel over a 6-week period. P. australis on the other hand, had a residual of 7% (93% removal) of cadmium, 5% (95% removal) of lead and 16% (84% removal) of nickel over a 6-week period. The results of the phytoremediation of naphthalene revealed a residual of 4% (96% removal) and 9% (91% removal) for B. maritimus and P. australis respectively over a period of 6 weeks. The major mechanisms employed by the two plants were probably phytostabilization and rhizodegradation and four distinct bacteria colonies were identified in planted media, namely : Enterobacter spp., Staphylococcus spp., Pseudomonas spp. and Bacillus spp.

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Page publiée le 24 novembre 2017, mise à jour le 18 janvier 2019