Utilização de solos locais para tratamento de efluentes do refino de petróleo contendo metais

Midugno, Rafael; Roisenberg, Ari; Viero, Antonio Pedro; Sanberg, Eduardo


The employment of local soils for extraction of metallic elements was evaluated through batch tests to treat wastewaters generated in a petroleum refinery plant in southern Brazil. Clay and organic carbon content and clay mineralogy provide these soils, in principle, with moderate metal retention capacity. The following retention order was established: Cr3+ > Pb2+ > Cu2+ > Hg2+ > Cd2+, with total amount of metals retained varying from 36 to 65 meq kg-1. The results show the high efficiency of local soils for extracting metals from liquid effluents through sorption and precipitation processes under acid pH conditions.

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  • IO - Artigos publicados em periódicos