AI Article Synopsis
- Sludge application improves soil fertility but can lead to heavy metal contamination, necessitating their removal.
- The study assessed the ability of Brassica napus (canola) to extract metals from sludge-amended soil, finding that sludge boosts biomass production and increases metal concentrations in the plants.
- While EDTA did not significantly impact plant growth, it enhanced the plant's ability to accumulate heavy metals, making B. napus effective for soil decontamination.
Article Abstract
Sludge application is a reliable practice to ameliorate soil fertility. However, repetitive sludge addition represents a potential soil contamination source with heavy metals, which must be extracted. The aim of this study was to evaluate the capacity of Brassica napus to remove metals from soils amended with sludge, and to study the effect of EDTA on this process. Seedlings were cultivated in presence of sludge combined or not with EDTA. Results showed that sludge ameliorate significantly biomass production. This effect was accompanied with an increase in Pb, Zn and Mn shoot concentrations. EDTA application does not affect significantly plant growth. However, this chelator enhances shoot metals accumulation. It's therefore concluded that sludge has a beneficial effect on soil fertility, B. napus can be used for the decontamination of affected soils and that the EDTA addition increases the ability of B. napus to accumulate heavy metals.
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| http://dx.doi.org/10.1016/j.biortech.2010.01.035 | DOI Listing |
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