Effects of silver nanoparticles on biological nitrogen removal processes.
Water Sci Technol
; 65(7): 1298-303, 2012.
Article
in En
| MEDLINE
| ID: mdl-22437029
ABSTRACT
The effects of silver (Ag) nanoparticles (NPs) on activated sludge in a biological nitrogen removal (BNR) process were investigated under aerobic and anoxic conditions. We show that nitrification was more vulnerable to Ag NPs exposure than denitrification at the same Ag NPs concentration. In continuous operation of the BNR process, a higher inhibitory effect on nitrification was attributed to a smaller size of Ag NPs. About 70-90% of the Ag NPs supplied were embedded in the sludge matrix but 10-30% of the Ag NPs remained in the supernatant. This indicates that significant amounts of Ag NPs could be discharged from wastewater treatment plants and potentially impact on aquatic ecosystems.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Silver
/
Waste Management
/
Nanoparticles
/
Nitrogen
Type of study:
Evaluation_studies
Language:
En
Journal:
Water Sci Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2012
Document type:
Article