Use of amaranth (Amaranthus paniculatus) and Indian mustard (Brassica juncea) for phytoextraction of lead and copper from contaminated soil. | [International Journal of Agriculture and Biology • 2013]

Author(s):

1. Motior M. Rahman: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

2. P. J. Tan: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

3. G. Faruq: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

4. A. M. Sofian: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

5. H. Rosli: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

6. A. N. Boyce: Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

Abstract:

This study investigated the use of contaminated soils with nitrogen (N) fertilizer at rates of 0, 2 and 4 g m-2 on copper (Cu) and lead (Pb) uptake by Indian mustard and amaranth. Addition of N fertilizer acidified the contaminated soil and caused the pH decrease to 5.5−5.6 from an initial pH 6.9. Total Cu uptake (15.7−21.4 mg kg-1) was appreciably higher than Pb uptake (12.7−16.9 mg kg-1) in both plant species with N amended soil. Contaminated soil amended with N fertilizer displayed maximum shoot concentration of Pb (10.1−11.6 mg kg-1) and Cu (11.6−14.3 mg kg-1), being two to four folds higher relative to roots (2.6−5.7 mg kg-1 for Pb; 3.5−4.7 mg kg-1 for Cu). Amaranth removed appreciably higher Pb (39.8−42.0%) and Cu (28.6−30.6%) than Indian mustard (31.6−35.6% for Pb; 27.9−32.2% for Cu) from contaminated soils with the application of N fertilizer. Shoot and root concentration (SC/RC) ratio of Pb and Cu was 1.9−4.3 and 2.6−3.8, respectively in both plant species with application of N fertilizer. The results suggest that N fertilizer is an effective amendment for phytoextraction of Pb and Cu from contaminated soils.

Page(s): 903-908

DOI: DOI not available

Published: Journal: International Journal of Agriculture and Biology, Volume: 15, Issue: 5, Year: 2013

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