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International Journal of Soil Science
  Year: 2016 | Volume: 11 | Issue: 4 | Page No.: 130-136
DOI: 10.3923/ijss.2016.130.136
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Phytoextraction Efficiency of Lead by Arum (Colocasia esculenta L.) Grown in Soil

Md. Shoffikul Islam , Md. Abul Kashem and Khan Towhid Osman

Background and Objective: Lead (Pb) contamination of agricultural soil and water via anthropogenic sources have resulted serious problems in the food chain and consequently the health of organisms, including man. Phytoremediation has been touted as a promising alternative for the generally expensive and disruptive conventional remediation techniques to clean up Pb contaminated soil. Therefore, the aim of this study was to investigate the Pb tolerance and phytoextraction efficiency of arum (Pani Kachu; Colocasia esculenta L.) grown in soil spiked with different levels of Pb. Materials and Methods: The plant was grown for 105 days in soils spiked with Pb at the levels of 0, 300, 600 and 1200 mg kg–1. The plant parts were digested with HNO3-HClO4 (3:1) acid mixture. Lead in the digests was measured using atomic absorption spectrophotometer. Results: Dry weight of plant parts was not affected by any levels of Pb concentration while concentration of Pb increased in plant parts with the increase of Pb levels in soil. In shoots, concentration of Pb was 7748 mg kg–1 at the highest level of Pb concentration (1200 mg kg–1) in soil. This concentration (1200 mg kg–1) did not cause any growth retardation of arum plant which indicated that arum was a metal hyperaccumulator plant. However, translocations of Pb in arum parts at this high level was 62% of total Pb which indicated that a major portion of metal was translocated from roots to shoots. Transfer Factor (TF) greater than one as found in the present experiment confirmed the hyperaccumulation characteristics of arum for Pb in soil media. Conclusion: This study indicated that the growth of arum was unaffected by application of any levels of Pb in soil. The Pb concentration in the shoots of arum without growth retardation and TF of Pb in arum indicated that this plant was a suitable candidate for the phytoremediation of Pb contaminated soil.
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How to cite this article:

Md. Shoffikul Islam, Md. Abul Kashem and Khan Towhid Osman, 2016. Phytoextraction Efficiency of Lead by Arum (Colocasia esculenta L.) Grown in Soil. International Journal of Soil Science, 11: 130-136.

DOI: 10.3923/ijss.2016.130.136






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