Effects of phytoremediation and application of organic amendment on the mobility of heavy metals in a polluted soil profile

This research aims to assess the effect of the application of biosolids compost and phytoremediation on the mobility of total and biodisponibles (DTPA) fractions of cadmium, copper, lead, and zinc from different horizons of a superficially contaminated soil. Leaching experiment in soil columns was p...

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Bibliographic Details
Published in:International journal of phytoremediation 2012-03, Vol.14 (3), p.212-220
Main Authors: Zubillaga, Marta Susana, Bressan, Emiliano, Lavado, Raúl S
Format: Article
Language:English
Subjects:
B horizons
Bacillus thuringiensis
Biodegradation, Environmental
biosolid compost
biosolids
Cadmium
Cadmium - metabolism
clay fraction
Composting
composts
Copper
Copper - metabolism
Environmental Monitoring
heavy metals
Horizon
Leaching
lead
Lead - metabolism
Metals, Heavy - metabolism
nutrients
Phytoremediation
Plants - metabolism
polluted soils
Soil (material)
Soil - chemistry
Soil Pollutants - metabolism
soil profiles
Zinc
Zinc - metabolism
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Summary:This research aims to assess the effect of the application of biosolids compost and phytoremediation on the mobility of total and biodisponibles (DTPA) fractions of cadmium, copper, lead, and zinc from different horizons of a superficially contaminated soil. Leaching experiment in soil columns was proposed. Treatments contemplated application of compost biosolid and phytoremediation. Two destructive samplings were performed. Total and DTPA trace metals were identified in each horizon. The overall performance of the various elements in its total and DTPA forms show greater concentration in horizon A and fewer gradients between horizons Bt and BC, thus assuming that the high content of clay in horizon Bt (62.9%) limits its movement through the horizons. In the mobile nutrients, a greater mobility was evidenced in DTPA fractions if compared to Total fractions. In the horizon A, the more mobile metals, such as Zn and Cd, evidenced a greater percentage of DTPA/Total fractions in all treatments. The application of compost with or without plant diminished the mobilization of Zn, Cu, and Cd Total, thus limiting a potential leaching to inferior horizons. However, this effect was not observed in the DTPA fraction.
ISSN:1549-7879
1522-6514
1549-7879
DOI:10.1080/15226514.2011.587848