Phytoremediation of heavy metal copper (Cu2+) by sunflower (Helianthus annuus l.)

[摘要] A study in microcosmic condition has been carried out to determine the effectiveness of Helianthus annuus as a hyperaccumulator plant for heavy metal, Copper (Cu2+), that exposed in the soil. Artificial pollutants containing Copper (Cu2+) 0, 60, 120, 180 ppm are exposed to uncontaminated soil. The 12-weeks old H. annuus seedling were grown in Cu2+contaminated soil, with variations of absorption time 3, 6, and 9 weeks. Analysis of Cu2+concentration on soil and H. annuus (root, stem, leaf) was analised by Atomic Absorbtion Spectrometry (AAS). H. annuus are capable for Cu2+removal, and the highest removal of Cu2+is 85.56%, the highest metal accumulation/bioconcentration factor (BCF) is 0.99 occurred at roots with 9 weeks of exposure time and the highest translocation factor (TF) is 0.71. This highest removal is five times better than absorption by stems and leaves. The results concluded, the use of H. annuus for phytoextraction of heavy metals Cu2+in contaminated soil can be an alternative to the absorption of heavy metal Cu2+with low concentration metals which is generally very difficult to do in physical-chemical removal.

[发布机构] Environmental Engineering Department, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia^1

[效力级别] 经济学

[关键词] Bio-concentration factors;Helianthus annuus;Hyperaccumulator;Phytoremediation;Translocation factor