Abstract
This study compares the efficiency of a synthetic chelate (ethylenediaminetetraacetic acid-EDTA), a natural low-molecular-weight organic acid (citric acid), and their combination for phytoremediation of Cu-pyrene co-contaminated soils. Zea mays was grown in each soil and amended with citric acid and/or EDTA to understand the effect of chelates during phytoremediation of contaminated soils. In Cu or pyrene-contaminated soil, plant growth was negatively affected by EDTA (43 %) and citric acid (44 %), respectively, while EDTA + citric acid promoted (41 %) plant growth in co-contaminated soil. EDTA and EDTA + citric acid increased the phytoextraction of Cu in Cu-contaminated and co-contaminated soils, respectively. In pyrene-contaminated soil, all tested chelates increased the dissipation of pyrene reaching 90.4 % for citric acid, while in co-contaminated soil, only citric acid or EDTA + citric acid enhanced pyrene dissipation. These results show that Z. mays can be effective with the help of chelates in phytoextraction of Cu and dissipation of pyrene in co-contaminated soil.
Original language | English |
---|---|
Article number | 74 |
Number of pages | 10 |
Journal | Water Air and Soil Pollution |
Volume | 226 |
Issue number | 3 |
Early online date | 25 Feb 2015 |
DOIs | |
Publication status | Published - Mar 2015 |
Keywords
- Citric acid
- EDTA
- Phytoremediation
- Z. mays
ASJC Scopus subject areas
- Pollution
- Environmental Chemistry
- Environmental Engineering
- Ecological Modelling
- Water Science and Technology