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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Bryson, Gretchen M.;
Barker, Allen V. |
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| Author Affiliation: | Department of Plant and Soil Sciences, University of Massachusetts, Amherst, Massachusetts |
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| Title: | Development and analysis of a zinc-contaminated soil |
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| Section: | Abstracts
Other records with the "Abstracts" Section
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| Source: | HortScience. Vol. 38, No. 3, June 2003, p. 489. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Zinc; Soil contamination; Soil texture; Festuca arundinacea
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| Abstract/Contents: | "For phytoremediation studies to be conducted a contaminated soil must be accessible. If an in-situ soil is not available a contaminated soil must be developed. The focus of this experiment was to develop a Zn-contaminated soil. Concerns in developing a Zn-contaminated soil are determining the amount of Zn to add and an incubation period that will allow sufficient time for the added Zn to react with the soil. Two soils of the Hadley series were used for this experiment each with a textural classification of silt loam. Soil 1 has a higher sand content (39%) than soil 2 (23%) and soil 2 has a higher organic matter content (11%) than soil 1 (4%). About 1-kg portions of soil were placed into 6-inch pots, and zinc sulfate was added and mixed with the soil to give Zn at 125, 250, 500, 1000, and 2000 mg路kg-1. Soil samples were taken after 7, 14, 21, and 28 days and extracted with Morgan's universal solution. Soil samples taken after 7 and 21 days were also sequentially extracted with water, Morgan's solution, and Mehlich 3 solution. All of the extracts were analyzed for Zn by atomic absorption spectroscopy. Morgan's extractable Zn increased linearly as the treatment levels increased, ranging from 41 mg路kg-1 Zn, at a treatment of 125 mg路kg-1 Zn, to 648 mg路kg-1 Zn, at a treatment of 2000 mg路kg-1 Zn. Mean Morgan's extractable Zn concentrations were highest at Day 7. The total concentrations of Zn, calculated from sums of the sequential extractions, increased linearly as treatment levels increased, ranging from 51 mg路kg-1 Zn, at a treatment of 125 mg路kg-1 Zn, to 719 mg路kg-1 Zn, at a treatment of 2000 mg路kg-1 Zn. The removal of Zn by Morgan's solution or by sequential extraction was not significantly different between the two soils; however, percent recoveries of Zn were higher for soil 2 (42%) than in soil 1 (34%). Also, as the incubation period progressed, the percent recoveries of Zn added decreased from 44%, on day 7, to 32%, on day 21. A viability study was conducted to assess the germination of Brassica juncea and Festuca arundinacea in Zn-contaminated soils. Brassica juncea germinated without mortality up to 1000 mg路kg-1 Zn. Festuca arundinacea germinated without mortality up to 2000 mg路kg-1 Zn. It was concluded that an appropriate incubation period would be 7 days, since any further incubation periods gave no significant differences in extractable Zn concentrations. Also, it was determined that soil Zn concentrations up to 1000 mg路kg-1 Zn would be suitable for phytoextraction studies with B. juncea and F. arundinacea." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bryson, G. M., and A. V. Barker. 2003. Development and analysis of a zinc-contaminated soil. HortScience. 38(3):p. 489. |
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