Phytoremediation potential of Helianthus annuus L in sewage-irrigated Indo-Gangetic alluvial soils |
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Authors: | Mani Dinesh Sharma Bechan Kumar Chitranjan Pathak Niraj Balak Shiv |
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Institution: | Sheila Dhar Institute of Soil Science, Department of Chemistry, University of Allahabad, Allahabad, India. |
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Abstract: | The study of phytoremediation potential of Helianthus annuus L was conducted in the sewage-irrigated Indo-Gangetic alluvial soils, India. Calcium @ 1.0% and Zn @ 40 ppm enhanced the yield of H. annuus L and minimized the toxicity of Cr in the investigated soils. The study indicated that H. annuus L is highly sensitive to Cr and Zn in terms of metallic pollution; and may be used as indicator plant. For Cr-phytoremediation, humic acid treatment @ 500 mL/acre induced the Cr-accumulation in roots (p < 0.007) and in shoots (p < 0.015), which was recorded 3.21 and 3.16 mg/kg in root and shoot of H. annuus L, respectively. We suggest that H. annuus L fulfils the necessary condition for efficiently increasing species bioaccumulation after soil treatment with humic acid in Cr-polluted sewage-irrigated soils through soil- plant rhizospheric processes. |
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Keywords: | chromium Helianthus annuus L humic acid phytoremediation soil amelioration |
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