PMID- 22995246
OWN - NLM
STAT- MEDLINE
DCOM- 20130411
LR  - 20131121
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 90
IP  - 2
DP  - 2013 Jan
TI  - Sorption of Pb2+ on mercapto functionalized sepiolite.
PG  - 548-55
LID - S0045-6535(12)01065-X [pii]
LID - 10.1016/j.chemosphere.2012.08.027 [doi]
AB  - Mercapto functionalized sepiolite (MSEP) was prepared by nanotexturization method 
      and applied for the sorption of Pb(2+) from aqueous solution. These samples 
      before and after sorption were characterized through XRD, FT-IR, (29)Si and (13)C 
      CP/MAS NMR and XPS. The sorption behaviors including thermodynamic and kinetic 
      parameters, effect factors and mechanisms of Pb(2+) sorption on MSEP were 
      studied. The maximum sorption amounts of 97 mg g(-1). The parameters DeltaH(0) and 
      DeltaS(0) were 33.637 kJ mol(-1) and 202.697 J mol(-1) K(-1), respectively. 
      Freundlich isotherm was proved to describe the sorption data better than other 
      isotherms and pseudo second order kinetic model could fit the sorption kinetic 
      processes well. The pH influenced the sorption of Pb(2+) on MSEP significantly 
      but background electrolytes have relative weak effect. Based on hard and soft 
      acids and bases theory and the results analyzed from XPS, the sorption mechanisms 
      could be explained as primarily chemical adsorption and secondary physical 
      adsorption.
CI  - Copyright (c) 2012 Elsevier Ltd. All rights reserved.
FAU - Liang, Xuefeng
AU  - Liang X
AD  - Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental 
      Protection Institute of Ministry of Agriculture, Tianjin 300191, PR China.
FAU - Xu, Yingming
AU  - Xu Y
FAU - Wang, Lin
AU  - Wang L
FAU - Sun, Yuebing
AU  - Sun Y
FAU - Lin, Dasong
AU  - Lin D
FAU - Sun, Yang
AU  - Sun Y
FAU - Qin, Xu
AU  - Qin X
FAU - Wan, Qian
AU  - Wan Q
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120917
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Magnesium Silicates)
RN  - 0 (Water Pollutants, Chemical)
RN  - 2P299V784P (Lead)
RN  - C2E1CI501T (magnesium trisilicate)
SB  - IM
MH  - Adsorption
MH  - Kinetics
MH  - Lead/analysis/*chemistry
MH  - Magnesium Silicates/*chemistry
MH  - Models, Chemical
MH  - Spectroscopy, Fourier Transform Infrared
MH  - Temperature
MH  - Thermodynamics
MH  - Water Pollutants, Chemical/analysis/*chemistry
MH  - Water Purification/*methods
EDAT- 2012/09/22 06:00
MHDA- 2013/04/12 06:00
CRDT- 2012/09/22 06:00
PHST- 2012/05/29 00:00 [received]
PHST- 2012/08/06 00:00 [revised]
PHST- 2012/08/13 00:00 [accepted]
PHST- 2012/09/22 06:00 [entrez]
PHST- 2012/09/22 06:00 [pubmed]
PHST- 2013/04/12 06:00 [medline]
AID - S0045-6535(12)01065-X [pii]
AID - 10.1016/j.chemosphere.2012.08.027 [doi]
PST - ppublish
SO  - Chemosphere. 2013 Jan;90(2):548-55. doi: 10.1016/j.chemosphere.2012.08.027. Epub 
      2012 Sep 17.