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Influence of Some Chelators on the Phytoextraction Ability of Sunflower ( Helianthus annuus) for Nickel‐Contaminated Soil
Author(s) -
Lotfy Siad M.,
Zhran Mostafa A.,
AbdelSabour Mamdouh
Publication year - 2014
Publication title -
remediation journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.762
H-Index - 27
eISSN - 1520-6831
pISSN - 1051-5658
DOI - 10.1002/rem.21417
Subject(s) - helianthus annuus , sunflower , phytoremediation , citric acid , nickel , chelation , chemistry , shoot , nitrate , soil contamination , agronomy , soil water , environmental chemistry , horticulture , heavy metals , inorganic chemistry , environmental science , food science , biology , soil science , organic chemistry
Chelation and complexation of nickel were evaluated as practical ways to solubilize, detoxify, and enhance nickel accumulation by plants. Sunflower ( Helianthus annuus ) was selected as a potential nickel accumulator in two selected soils with different textures and nickel‐contamination levels. To enhance metal phytoextraction, ammonium nitrate and organic chelators (EDTA and citric acid) were added to soils in pots at rates of 0, 5, 10, and 20 mmol/kg. The pot experiments were run for eight weeks. The highest nickel uptake was obtained in plants grown on clayey soil, and the lowest uptake was observed in sandy soil. Citric acid was the most effective chelator of nickel metals that could enhance nickel accumulation in the sunflower shoots. The ammonium nitrate application showed a low effect on metal translocation into the sunflower shoots. © 2014 Wiley Periodicals, Inc.