Avaliação quimiométrica da distribuição de metais pesados em composto de lixo urbano domiciliar

Fernando Barboza Egreja Filho, Efraim Lázaro Reis, Cláudio Pereira Jordão, João Tinoco Pereira Neto
1999 Química Nova  
Recebido em 23/3/98; aceito em 19/8/98 CHEMOMETRIC EVALUATION OF THE HEAVY METAL DISTRIBUTION IN COMPOST OF DOMICILIARY URBAN GARBAGE. The main obstacle to the use of compost from urban waste in agriculture is the presence of heavy metals. Once in the soil, their effect is accumulative and they may contaminate crops and water. The present study reports the evaluation of the chemical distributions of Cu, Pb, Mn and Zn in three different sized fractions (unsieved, < 1,18mm and > 1,18mm) of
more » ... , by means of a sequencial extraction procedure and a chemometric analysis of the total content of all metals in each fraction. The pattern recognition methods showed significant differences in total heavy metal contents for the different fractions. The finest one was the most contaminated. Meanwhile, this fraction presented lower amounts of metals in avaliable forms. This behavior can be attributed to the presence of metal particles in their elemental states in this fraction.
doi:10.1590/s0100-40421999000300007 fatcat:5nagitjfibfx3g4fqeu47qpuzy