Effects of various chelators on the uptake of Cu, Pb, Zn and Fe by maize and Indian mustard from sllty loam soil polluted by the emissions from copper smelter
Anna Karczewska , Bernard Gałka , Cezary Kabała , Katarzyna Szopka , Karolina Kocan , Kamila Dziamba
AbstractThree chelating compounds: EDTA, EDDS, and histidine, were tested as potential agents to mobilize Cu and three other metals: Pb, Zn, and Fe from polluted soil collected from arable land in the vicinity of copper smelter. Total concentrations of Cu and Pb in soil were: 395 and 212 mg/kg, respectively, and considerably exceeded soil quality standards. In extraction tests, Cu was mobilized with the following efficiency: EDTA > EDDS > histidine. Therefore, all those chelators were chosen for a pot experiment to examine induced phytoextraction of Cu by maize (Zea mays) and Indian mustard (Brassica juncea). Chelators were applied at the rate of 1.0 mmol/kg, and histidine was additionally used at doubled rate (2.0 mmol/kg). Experiment was carried out with two different watering regimes. EDTA and EDDS caused significant increase of Cu uptake from soils, but Cu concentrations in biomass were far below those required for efficient soil remediation. Moreover, Cu leaching from soil was much more intensive than plant uptake. Histidine did not prove to be an efficient chelator to induce intensive uptake of Cu by tested plants. Plant uptake of Pb, Zn and Fe was only poorly affected by chelate application, so was also the process of their leaching.
|Journal series||Fresenius Environmental Bulletin, ISSN 1018-4619, e-ISSN 1610-2304, (A 15 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||EDDS; EDTA; Heavy metals; Histidine; Leaching; Phytoextraction|
|ASJC Classification||; ;|
|Publication indicators||= 8; = 7; : 2009 = 0.41; : 2009 = 0.531 (2) - 2009=0.63 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.