J. Rivera et al., DETERMINATION OF PCDF PCDD IN SLUDGES FROM A DRINKING-WATER TREATMENT-PLANT - INFLUENCE OF CHLORINATION TREATMENT/, Chemosphere, 34(5-7), 1997, pp. 989-997
A preliminary study to assess the origin and evolution of polichlorodi
benzofurans (PCDFs) and polichlorodibenzo-p-dioxins (PCDDs) in a drink
ing water treatment plant (DWTP) was undertaken. Samples of coagulatio
n sludges and exhausted granular activated carbon (GAG) were collected
from a DWTP. Owing to the similar congener profiles obtained from slu
dges and GAG, a subsequent study of chlorination influence was carried
out. Sludge samples from a treatment with and without the chlorinatio
n step were analysed. A complementary study of the PCB content was mad
e. The results obtained did not reveal a marked influence of chlorinat
ion in the formation of PCDFs/PCDDs. (C) 1997 Elsevier Science Ltd.