2 results

Heavy metals availability for corn cultivated in a Latosol sucessively amended with sewage sludges

Carlos Alberto Silva, Otacílio José Passos Rangel, José Flávio Dynia, Wagner Bettiol, Celso Vainer Manzatto

01/Apr/2006

This study carried out in order to evaluate the effect of sewage sludge (from Barueri: industrial and residential sewage, and Franca (SP) State: residential sewage) doses on soil heavy metal contents and their availability to corn. Three successive experiments were installed in a Latosol at the Experimental Field of Embrapa Environment, in Jaguariúna (SP), from 1999 to 2001. The treatments investigated consisted of: control (without sewage sludge); mineral fertilization (NPK) recommended for corn; and application of both sewage sludge sources […]

Zinc fractionation and availability by different extractants in sewage sludge-incubated soils

Josângela do Carmo Trezena de Araújo, Clístenes Williams Araújo do Nascimento

01/Dec/2005

The final disposal of sewage sludge has become a cause of environmental concern. Because of its high content of both organic matter and plant nutrients, sewage sludge has been used as fertilizer. However, it is important to know the fractions and bioavailability of heavy metals in sludge-amended soils. In the case of zinc, one of the most abundant metals in sewage sludge, knowledge on forms and plant availability are important to predict its behavior in soils. The present experiment was […]