PMID- 27348186
OWN - NLM
STAT- MEDLINE
DCOM- 20170719
LR  - 20180501
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 50
IP  - 14
DP  - 2016 Jul 19
TI  - Adsorption Behavior of Extracellular Polymeric Substances on Graphene Materials 
      Explored by Fluorescence Spectroscopy and Two-Dimensional Fourier Transform 
      Infrared Correlation Spectroscopy.
PG  - 7364-72
LID - 10.1021/acs.est.6b01286 [doi]
AB  - Adsorption isotherms of extracellular polymeric substances (EPS) on graphene 
      oxide (GO) and reduced GO (rGO) were studied using fluorescence 
      excitation-emission matrix-parallel factor analysis (EEM-PARAFAC) and 
      two-dimensional correlation spectroscopy (2D-COS) combined with Fourier transform 
      infrared spectroscopy (FTIR). Chemical reduction of GO resulted in a greater 
      extent of carbon adsorption with a higher degree of isotherm nonlinearity, 
      suggesting that heterogeneous adsorption sites were additionally created by GO 
      reduction. Two protein-like and two humic-like components were identified from 
      EPS by EEM-PARAFAC. Adsorption of protein-like components was greater than that 
      of humic-like components, and the preferential adsorption was more pronounced for 
      GO versus rGO. Adsorption of protein-like components was more governed by 
      site-limiting mechanisms than humic-like components as shown by the higher 
      isotherm nonlinearity. 2D-COS provided further information on the adsorption of 
      secondary protein structures. Adsorption of the EPS structures related to amide I 
      and aromatic C-C bands was greater for rGO versus GO. Protein structures of EPS 
      were more favorable for adsorption in the order of alpha-helix --> amide II --> beta-sheet 
      structures with increasing site limitation. Our results revealed successful 
      applicability of EEM-PARAFAC and 2D-COS in examining the adsorption behavior of 
      heterogeneous biological materials on graphene materials.
FAU - Lee, Bo-Mi
AU  - Lee BM
AD  - Department of Environment and Energy, Sejong University , Seoul, 143-747, South 
      Korea.
FAU - Hur, Jin
AU  - Hur J
AD  - Department of Environment and Energy, Sejong University , Seoul, 143-747, South 
      Korea.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160711
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Polymers)
RN  - 7782-42-5 (Graphite)
SB  - IM
MH  - Adsorption
MH  - Fourier Analysis
MH  - *Graphite
MH  - Polymers/chemistry
MH  - *Spectrometry, Fluorescence
MH  - Spectroscopy, Fourier Transform Infrared
EDAT- 2016/06/28 06:00
MHDA- 2017/07/20 06:00
CRDT- 2016/06/28 06:00
PHST- 2016/06/28 06:00 [entrez]
PHST- 2016/06/28 06:00 [pubmed]
PHST- 2017/07/20 06:00 [medline]
AID - 10.1021/acs.est.6b01286 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2016 Jul 19;50(14):7364-72. doi: 10.1021/acs.est.6b01286. 
      Epub 2016 Jul 11.