Abstract:
:Hexachlorocyclohexanes (HCHs) are currently considered potentially carcinogenic to humans. In Brasil, severe soil contamination by HCHs has been identified at Cidade dos Meninos, Duque de Caxias, Rio de Janeiro, where an old HCH factory was abandoned 40 years ago, leaving 1,700 local residents at risk. Calcium oxide treatment was performed on the most heavily contaminated (focus) area. Analysis of superficial soil samples collected years after treatment still showed high residual HCH. Contamination levels as high as 6,200mg/Kg and 7,320mg/Kg were found for alpha- and beta-HCH isomers. For the gamma- and delta-HCH isomers, concentrations reached up to 140mg/Kg and 530mg/Kg, respectively. The results showed that calcium oxide treatment was not efficient to decontaminate the soil in this area.
journal_name
Cad Saude Publicajournal_title
Cadernos de saude publicaauthors
de Oliveira RM,Bastos LH,de Oliveira e Dias AE,da Silva SA,Moreira JCdoi
10.1590/s0102-311x2003000200011keywords:
subject
Has Abstractpub_date
2003-03-01 00:00:00pages
447-53issue
2eissn
0102-311Xissn
1678-4464pii
S0102-311X2003000200011journal_volume
19pub_type
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