A combined landfarming-phytoremediation system for remediation of petroleum hydrocarbons and metals from contaminated soils
Petroleum hydrocarbons are among the most common groups of persistent organic contaminants in the environment and are known to be toxic to many organisms. In this study, plant establishment and growth in two petroleum contaminated soils (S1 and S2), which were previously treated using landfarming technique, was evaluated. Investigation of phytoremediation technique for remediation of heavy metals in these petroleum contaminated soils was also part of the purpose.
Results showed that plants growth was significantly (P<0.05) reduced by the presence of petroleum hydrocarbons in the soils, however, plant establishment and development was much more facilitated in the soil in which the landfarming operations were carried out prior to phytoremediation. Microbial respiration in the rhizosphere of agropyron for both soils S1 and S2 was higher than that in the rhizosphere of tall fescue. Urease activity in the rhizosphere of agropyron and tall fescue in the landfarming treatment for soil S1 was about 47% higher than that in the unplanted control soil. More than 40 and 20% of total amount of hydrocarbons in the landfarming treatment were eliminated from soil S1 in the rhizosphere of agropyron and tall fescue as compared to unplanted soil, respectively. Furthermore, higher metal (Fe, Zn, Mn, Cu, and Ni) concentrations were found in the plant tissues from landfarming treatment than the control treatment (without landfarming operations). However, the average concentration of metals in the underground tissues of investigated plants was considerably greater than the aboveground tissues.
| Copyright: | © Aristotle University of Thessaloniki | |
| Quelle: | 2nd International Conference 2009 (Juni 2009) | |
| Seiten: | 6 | |
| Preis inkl. MwSt.: | € 5,00 | |
| Autor: | A.A. Besalatpour  Prof. Mohammad-Ali Hajabbasi V. Dorostkar G. Torabi | |
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