Fate and removal of permethrin by conventional activated sludge treatment.
Environ Technol
; 32(11-12): 1367-73, 2011.
Article
en En
| MEDLINE
| ID: mdl-21970178
The fate and removal of permethrin during conventional wastewater treatment were evaluated at pilot-plant scale at different concentrations of mixed liquor suspended solids (MLSS) and, hence, different solids retention times (SRT). At feed concentrations of 0.26-0.86 microg L(-1), the permethrin was removed by primary treatment at an efficiency rate of 37%, similar to previously reported data, and from 40% to 83% for secondary treatment, decreasing with decreasing SRT. Comparable ranges, from 37% up to 98%, have been reported for micropollutants with similar physicochemical properties to permethrin, such as galaxolide and tonalide. Little difference in removal was noted between the medium and low MLSS concentrations trials, the main difference in treated effluent permethrin concentration arising on changing from high to medium MLSS levels. This was attributed to the limited acclimatization period employed in these two trials, leading to higher levels of soluble organic matter in the treated water, with which the permethrin appeared to be associated.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aguas del Alcantarillado
/
Contaminantes Químicos del Agua
/
Purificación del Agua
/
Permetrina
Idioma:
En
Revista:
Environ Technol
Asunto de la revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Año:
2011
Tipo del documento:
Article
Pais de publicación:
Reino Unido