Publication: Evaluation of Pb phytoremediation potential in Buddleja asiatica and B. paniculata
Issued Date
2008-09-01
Resource Type
ISSN
15732932
00496979
00496979
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2-s2.0-48149099099
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Mahidol University
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SCOPUS
Bibliographic Citation
Water, Air, and Soil Pollution. Vol.193, No.1-4 (2008), 79-90
Suggested Citation
Piyaporn Waranusantigul, Maleeya Kruatrachue, Prayad Pokethitiyook, Choowong Auesukaree Evaluation of Pb phytoremediation potential in Buddleja asiatica and B. paniculata. Water, Air, and Soil Pollution. Vol.193, No.1-4 (2008), 79-90. doi:10.1007/s11270-008-9669-0 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/19228
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Title
Evaluation of Pb phytoremediation potential in Buddleja asiatica and B. paniculata
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Abstract
The phytoremediation potential for Pb of Buddleja asiatica (a wild species) and a closely related cultivated species, B. paniculata, was investigated by means of field survey, hydroponic and pot experiments, and field trial experiments. Field surveys showed that B. asiatica had an extraordinary accumulation capacity and tolerance for Pb. Plants grown in soil with 2,369.8-206,152 mg kg-1total Pb accumulated 1,835.5-4,335.8 mg kg-1Pb in their shoots. Under hydroponic conditions (10, 20 mg l-1Pb), both B. asiatica and B. paniculata showed unusually high concentrations of Pb in their roots (12,133-21,667 mg kg-1) and increased biomass production. A pot experiment in a greenhouse without any soil amendments was conducted on three different soils with various Pb contents (10,652, 31,304, 89,083 mg kg-1) for 3 months. The results showed that both species of Buddleja had an increase in the biomass similar to the control plants. There was a slight decrease in survival rates of plants grown in soil with 89,083 mg kg-1Pb content. A field trial experiment was conducted for 6 months at three sites around the Pb mine area in which plants were provided with Osmocote fertilizer. Both Buddleja species showed 100% survival, increased biomass production and phytoextraction capacity (TF 1.1-2.3) when grown in soil with Pb content of 94,584-101,405 mg kg-1. Plants accumulated 2,273-3,675 mg kg-1Pb in their shoots. The results suggest these Buddleja plants are suitable for use in the phytoremediation of Pb-contaminated soil. © 2008 Springer Science+Business Media B.V.