← Return
FINAL DESTINATION OF CADMIUM FOUND IN CONTAMINATED SEWAGE SLUDGE IN MAIZE-CULTIVATED RED NITOSOIL
Volume: 11
Number: 12
Year: 2003
Pages: 1-11
Brvim Lenzi; Silvia Naves de Souza
Abstract:
<p align="justify"> Remains of human activity, such as sewage sludge, caused by population growth, ate a challenge to the environment and need urgent solutions. Cadmium from contaminated biosolid (sewage sludge) in Red Nitosoil, in PVC tubes (10 cm diameter and 80 cm height) located in the greenhouse, has been analyzed. Natural biosolid in one treatment (control), cadmium-and-lead contaminated biosolid in other two treatments (2,500 and 5,000 &#956;g.g<sup>-1</sup>); cadmium-and-lead contaminated biosolid in other two treatments (2,500 Cd<sup>+</sup> 2,500 Pb and 5,000 Pb &#956;g.g<sup>-1</sup>, respectively) were added to the 0- 20 cm soil surface layer. Maize was the test plant in the triple replication experiment. The aerial part of maize plants, samples of surface soil (0 - 20 cm), and that within the tubes, divided into internal and external samples of each tube, were harvested seventy-five days after sowing. After the preparation and nitro perchloric digestion of samples, Cd concentrations were measured by atomic absorption spectrometry. Cd concentrations in maize were within phytotoxic tolerance. There was no significant difference among treatments in the production of plant dry matter. The highest Cd concentration was found in the 0-20 cm soil layer and differed significantly from the rest. </p>
DOI: 10.48141/SBJCHEM.v11.n12.2003.6_2003_2004.pdf
Download PDF