The fate of steroid estrogens: partitioning during wastewater treatment and onto river sediments.
Environ Monit Assess
; 175(1-4): 431-41, 2011 Apr.
Article
em En
| MEDLINE
| ID: mdl-20556648
ABSTRACT
The partitioning of steroid estrogens in wastewater treatment and receiving waters is likely to influence their discharge to, and persistence in, the environment. This study investigated the partitioning behaviour of steroid estrogens in both laboratory and field studies. Partitioning onto activated sludge from laboratory-scale Husmann units was rapid with equilibrium achieved after 1 h. Sorption isotherms and Kd values decreased in the order 17α-ethinyl estradiol>17α-estradiol>estrone>estriol without a sorption limit being achieved (1/n>1). Samples from a wastewater treatment works indicated no accumulation of steroid estrogens in solids from primary or secondary biological treatment, however, a range of steroid estrogens were identified in sediment samples from the River Thames. This would indicate that partitioning in the environment may play a role in the long-term fate of estrogens, with an indication that they will be recalcitrant in anaerobic conditions.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Sedimentos Geológicos
/
Rios
/
Estrogênios
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article