PMID- 21684082
OWN - NLM
STAT- MEDLINE
DCOM- 20111018
LR  - 20151119
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 192
IP  - 1
DP  - 2011 Aug 15
TI  - Interaction of silver nanoparticles (SNPs) with bacterial extracellular proteins 
      (ECPs) and its adsorption isotherms and kinetics.
PG  - 299-306
LID - 10.1016/j.jhazmat.2011.05.024 [doi]
AB  - Indiscriminate and increased use of silver nanoparticles (SNPs) in consumer 
      products leads to the release of it into the environment. The fate and transport 
      of SNPs in environment remains unknown. We have studied the interaction of SNPs 
      with extracellular protein (ECP) produced by two environmental bacterial species 
      and the adsorption behavior in aqueous solutions. The effect of pH and salt 
      concentrations on the adsorption was also investigated. The adsorption process 
      was found to be dependent on surface charge (zeta potential). The capping of SNPs 
      by ECP was confirmed by Fourier transform infrared spectroscopy and X-ray 
      diffraction. The adsorption of ECP on SNPs was analyzed by Langmuir and 
      Freundlich models, suggesting that the equilibrium adsorption data fitted well 
      with Freundlich model. The equilibrium adsorption data were modeled using the 
      pseudo-first-order and pseudo-second-order kinetic equations. The results 
      indicated that pseudo-second-order kinetic equation would better describe the 
      adsorption kinetics. The capping was stable at environmental pH and salt 
      concentration. The destabilization of nanoparticles was observed at alkaline pH. 
      The study suggests that the stabilization of nanoparticles in the environment 
      might lead to the accumulation and transport of nanomaterials in the environment, 
      and ultimately destabilizes the functioning of the ecosystem.
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Khan, S Sudheer
AU  - Khan SS
AD  - Centre for Nano-Biotechnology, School of Bio-Sciences and Technology, VIT 
      University, Katpadi Road, Vellore 632014, Tamilnadu, India.
FAU - Srivatsan, P
AU  - Srivatsan P
FAU - Vaishnavi, N
AU  - Vaishnavi N
FAU - Mukherjee, Amitava
AU  - Mukherjee A
FAU - Chandrasekaran, N
AU  - Chandrasekaran N
LA  - eng
PT  - Journal Article
DEP - 20110601
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Bacterial Proteins)
RN  - 3M4G523W1G (Silver)
RN  - 451W47IQ8X (Sodium Chloride)
SB  - IM
MH  - Adsorption
MH  - Bacterial Proteins/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - *Metal Nanoparticles
MH  - *Silver
MH  - Sodium Chloride/analysis
MH  - Spectrophotometry, Ultraviolet
MH  - Thermodynamics
MH  - X-Ray Diffraction
EDAT- 2011/06/21 06:00
MHDA- 2011/10/19 06:00
CRDT- 2011/06/21 06:00
PHST- 2010/12/23 00:00 [received]
PHST- 2011/03/31 00:00 [revised]
PHST- 2011/05/09 00:00 [accepted]
PHST- 2011/06/21 06:00 [entrez]
PHST- 2011/06/21 06:00 [pubmed]
PHST- 2011/10/19 06:00 [medline]
AID - S0304-3894(11)00662-5 [pii]
AID - 10.1016/j.jhazmat.2011.05.024 [doi]
PST - ppublish
SO  - J Hazard Mater. 2011 Aug 15;192(1):299-306. doi: 10.1016/j.jhazmat.2011.05.024. 
      Epub 2011 Jun 1.