title: Effects of phytoremediation and application of organic amendment on the mobility of heavy metals in a polluted soil profile.
abstract: 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.
authors.affiliation: Fertility and Fertilizers Class, School ofAgronomy, City of Buenos Aires, Argentina. zubillag@agro.uba.ar
authors.forename: Marta Susana
authors.initials: MS
authors.lastname: Zubillaga
authors.forename: Emiliano
authors.initials: E
authors.lastname: Bressan
authors.forename: Raúl S
authors.initials: RS
authors.lastname: Lavado
mesh_terms: D001673:Biodegradation, Environmental; D002104:Cadmium / Q000378:metabolism; D003300:Copper / Q000378:metabolism; D004784:Environmental Monitoring; D007854:Lead / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism*; D010944:Plants / Q000378:metabolism; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead; D003300:Copper; D015032:Zinc