PMID- 19324390
OWN - NLM
STAT- MEDLINE
DCOM- 20090625
LR  - 20131121
IS  - 0043-1354 (Print)
IS  - 0043-1354 (Linking)
VI  - 43
IP  - 9
DP  - 2009 May
TI  - Adsorption of 2,4,6-trichlorophenol by multi-walled carbon nanotubes as affected 
      by Cu(II).
PG  - 2409-18
LID - 10.1016/j.watres.2009.03.002 [doi]
AB  - Adsorption equilibrium of 2,4,6-trichlorophenol (TCP) on multi-walled carbon 
      nanotubes (MWCNTs) was investigated to explore the possibility of using MWCNTs 
      for concentration, detection and removal of TCP from contaminated water. The 
      adsorption of TCP on MWCNTs at pH 4 was nonlinear, reversible and best fit by a 
      Polanyi-Manes model. Oxidation treatment increased surface area and introduced 
      hydrophilic carboxylic groups to the defect sites of MWCNTs, hence increased the 
      sorption of TCP and Cu(II) individually. Cu(II) suppressed the sorption of TCP on 
      oxidized MWCNTs15A, but had little effect on as-grown MWCNTs15. TCP had no 
      influence on Cu(II) sorption to either. The mechanisms of Cu(II) suppression 
      effect on TCP adsorption are ascribed to the formation of surface complexes of 
      Cu(II), which was verified by X-ray absorption spectroscopy. Cu(II) exerts a 
      cross-linking effect of functional groups on adjacent tubes, creating a more 
      tightly knit bundle and suppressing the condensation of TCP in the pore spaces 
      between the tubes. The large hydration sphere around surface complexes of Cu(II) 
      may also intrude or shield hydrophilic sites, leading to the "crowding out" of 
      TCP around the Cu(II)-complexed sites.
FAU - Chen, Guang-Cai
AU  - Chen GC
AD  - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research 
      Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Haidian 
      District, Beijing, China.
FAU - Shan, Xiao-Quan
AU  - Shan XQ
FAU - Wang, Yu-Sheng
AU  - Wang YS
FAU - Wen, Bei
AU  - Wen B
FAU - Pei, Zhi-Guo
AU  - Pei ZG
FAU - Xie, Ya-Ning
AU  - Xie YN
FAU - Liu, Tao
AU  - Liu T
FAU - Pignatello, Joseph J
AU  - Pignatello JJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20090311
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Chlorophenols)
RN  - 0 (Nanotubes, Carbon)
RN  - 0 (Nitrates)
RN  - 789U1901C5 (Copper)
RN  - 9TC879S2ZV (copper(II) nitrate)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Absorptiometry, Photon
MH  - Adsorption
MH  - Chlorophenols/*isolation & purification
MH  - *Copper/chemistry
MH  - Nanotubes, Carbon/*chemistry
MH  - *Nitrates/chemistry
MH  - Oxidation-Reduction
MH  - Spectroscopy, Fourier Transform Infrared
MH  - Water Purification/*methods
EDAT- 2009/03/28 09:00
MHDA- 2009/06/26 09:00
CRDT- 2009/03/28 09:00
PHST- 2008/11/17 00:00 [received]
PHST- 2009/02/27 00:00 [revised]
PHST- 2009/03/02 00:00 [accepted]
PHST- 2009/03/28 09:00 [entrez]
PHST- 2009/03/28 09:00 [pubmed]
PHST- 2009/06/26 09:00 [medline]
AID - S0043-1354(09)00144-4 [pii]
AID - 10.1016/j.watres.2009.03.002 [doi]
PST - ppublish
SO  - Water Res. 2009 May;43(9):2409-18. doi: 10.1016/j.watres.2009.03.002. Epub 2009 
      Mar 11.