PMID- 21917290
OWN - NLM
STAT- MEDLINE
DCOM- 20120118
LR  - 20131121
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 45
IP  - 17
DP  - 2011 Nov 1
TI  - Long-term effect of ZnO nanoparticles on waste activated sludge anaerobic 
      digestion.
PG  - 5612-20
LID - 10.1016/j.watres.2011.08.022 [doi]
AB  - The increasing use of zinc oxide nanoparticles (ZnO NPs) raises concerns about 
      their environmental impacts, but the potential effect of ZnO NPs on sludge 
      anaerobic digestion remains unknown. In this paper, long-term exposure 
      experiments were carried out to investigate the influence of ZnO NPs on methane 
      production during waste activated sludge (WAS) anaerobic digestion. The presence 
      of 1 mg/g-TSS of ZnO NPs did not affect methane production, but 30 and 150 
      mg/g-TSS of ZnO NPs induced 18.3% and 75.1% of inhibition respectively, which 
      showed that the impact of ZnO NPs on methane production was dosage dependant. 
      Then, the mechanisms of ZnO NPs affecting sludge anaerobic digestion were 
      investigated. It was found that the toxic effect of ZnO NPs on methane production 
      was mainly due to the release of Zn(2+) from ZnO NPs, which may cause the 
      inhibitory effects on the hydrolysis and methanation steps of sludge anaerobic 
      digestion. Further investigations with enzyme and fluorescence in situ 
      hybridization (FISH) assays indicated that higher concentration of ZnO NPs 
      decreased the activities of protease and coenzyme F(420), and the abundance of 
      methanogenesis Archaea.
CI  - Copyright (c) 2011 Elsevier Ltd. All rights reserved.
FAU - Mu, Hui
AU  - Mu H
AD  - State Key Laboratory of Pollution Control and Resources Reuse, School of 
      Environmental Science and Engineering, Tongji University, Shanghai, China.
FAU - Chen, Yinguang
AU  - Chen Y
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110823
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Reactive Oxygen Species)
RN  - 0 (Sewage)
RN  - 64885-97-8 (coenzyme F420)
RN  - EC 2.7.2.1 (Acetate Kinase)
RN  - EC 3.4.- (Peptide Hydrolases)
RN  - OP0UW79H66 (Methane)
RN  - SOI2LOH54Z (Zinc Oxide)
RN  - TLM2976OFR (Riboflavin)
SB  - IM
MH  - Acetate Kinase/metabolism
MH  - Anaerobiosis/drug effects
MH  - Biomass
MH  - Bioreactors/microbiology
MH  - In Situ Hybridization, Fluorescence
MH  - Metabolic Networks and Pathways/drug effects
MH  - Methane/metabolism
MH  - Nanoparticles/*chemistry/ultrastructure
MH  - Peptide Hydrolases/metabolism
MH  - Reactive Oxygen Species/metabolism
MH  - Riboflavin/analogs & derivatives/metabolism
MH  - Sewage/*microbiology
MH  - Time Factors
MH  - Waste Disposal, Fluid
MH  - *Water Purification
MH  - Zinc Oxide/*toxicity
EDAT- 2011/09/16 06:00
MHDA- 2012/01/19 06:00
CRDT- 2011/09/16 06:00
PHST- 2011/05/09 00:00 [received]
PHST- 2011/08/10 00:00 [revised]
PHST- 2011/08/14 00:00 [accepted]
PHST- 2011/09/16 06:00 [entrez]
PHST- 2011/09/16 06:00 [pubmed]
PHST- 2012/01/19 06:00 [medline]
AID - S0043-1354(11)00459-3 [pii]
AID - 10.1016/j.watres.2011.08.022 [doi]
PST - ppublish
SO  - Water Res. 2011 Nov 1;45(17):5612-20. doi: 10.1016/j.watres.2011.08.022. Epub 
      2011 Aug 23.