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Effect of Medicago sativa L. and compost on organic and inorganic pollutant removal from a mixed contaminated soil and risk assessment using ecotoxicological tests.
- Source :
-
International journal of phytoremediation [Int J Phytoremediation] 2016 Nov; Vol. 18 (11), pp. 1136-47. - Publication Year :
- 2016
-
Abstract
- Several Gentle Remediation Options (GRO), e.g., plant-based options (phytoremediation), singly and combined with soil amendments, can be simultaneously efficient for degrading organic pollutants and either stabilizing or extracting trace elements (TEs). Here, a 5-month greenhouse trial was performed to test the efficiency of Medicago sativa L., singly and combined with a compost addition (30% w/w), to treat soils contaminated by petroleum hydrocarbons (PHC), Co and Pb collected at an auto scrap yard. After 5 months, total soil Pb significantly decreased in the compost-amended soil planted with M. sativa, but not total soil Co. Compost incorporation into the soil promoted PHC degradation, M. sativa growth and survival, and shoot Pb concentrations [3.8 mg kg(-1) dry weight (DW)]. Residual risk assessment after the phytoremediation trial showed a positive effect of compost amendment on plant growth and earthworm development. The O2 uptake by soil microorganisms was lower in the compost-amended soil, suggesting a decrease in microbial activity. This study underlined the benefits of the phytoremediation option based on M. sativa cultivation and compost amendment for remediating PHC- and Pb-contaminated soils.
Details
- Language :
- English
- ISSN :
- 1549-7879
- Volume :
- 18
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- International journal of phytoremediation
- Publication Type :
- Academic Journal
- Accession number :
- 27216854
- Full Text :
- https://doi.org/10.1080/15226514.2016.1186594