PMID- 24019142
OWN - NLM
STAT- MEDLINE
DCOM- 20140613
LR  - 20211021
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 21
IP  - 3
DP  - 2014 Feb
TI  - Adsorption and desorption of 2,4,6-trichlorophenol onto and from ash as affected 
      by Ag(+), Zn (2+), and Al (3+).
PG  - 2002-2008
LID - 10.1007/s11356-013-2122-y [doi]
AB  - Metal cations and organic pollutants mostly co-exist in the natural environment. 
      However, their interactions in adsorption processes have yet to be adequately 
      addressed. In the current study, the effect of inorganic cations with different 
      charges (Ag(+), Zn(2+), and Al(3+)) on the adsorption and desorption of 
      2,4,6-trichlorophenol (TCP) onto and from processed ash derived from wheat 
      (Triticum aestivum L.) straw was investigated. The adsorption and desorption of 
      TCP were both nonlinear; the isotherm and kinetics curves fitted well using the 
      Freundlich equation and a pseudo-second-order model, respectively. The presence 
      of Ag(+) promoted TCP adsorption, while Zn(2+) and Al(3+) reduced TCP adsorption 
      onto ash. The desorption of TCP from ash showed obvious hysteresis, and the 
      presence of Ag(+), Zn(2+), and Al(3+) caused the desorption to be less 
      hysteretic. The suppression of TCP adsorption by Zn(2+) and Al(3+) was ascribed 
      to the partial overlapping of adsorption groups between TCP and metal ions. 
      Al(3+) had a stronger inhibition effect than that of Zn(2+) due to its higher 
      binding capacity and larger hydrated ionic radius than those of Zn(2+). Enhanced 
      adsorption of TCP onto ash by Ag(+) was ascribed to its ability to reduce the 
      competitive adsorption of water molecules on ash surface by replacing the 
      original ions, such as Na(+) and Ca(2+), and compressing the hydrated ionic 
      radius of these metal ions. In addition, Ag(+) was able to bind with the aromatic 
      organic compounds containing pi-electrons, which resulted in a further increase of 
      TCP adsorption by ash.
FAU - Chen, Guangcai
AU  - Chen G
AD  - Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, 
      Zhejiang, 311400, China. guangcaichen@sohu.com.
FAU - Wang, Yusheng
AU  - Wang Y
AD  - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research 
      Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 
      100085, China.
FAU - Pei, Zhiguo
AU  - Pei Z
AD  - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research 
      Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 
      100085, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130910
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Cations)
RN  - 0 (Chlorophenols)
RN  - 0 (Coal Ash)
RN  - 0 (Metals)
RN  - 3M4G523W1G (Silver)
RN  - CPD4NFA903 (Aluminum)
RN  - J41CSQ7QDS (Zinc)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Adsorption
MH  - Aluminum/chemistry
MH  - Cations
MH  - Chlorophenols/*chemistry
MH  - Coal Ash/*chemistry
MH  - Kinetics
MH  - Metals/*chemistry
MH  - Silver/chemistry
MH  - Zinc/chemistry
EDAT- 2013/09/11 06:00
MHDA- 2014/06/15 06:00
CRDT- 2013/09/11 06:00
PHST- 2013/06/06 00:00 [received]
PHST- 2013/08/29 00:00 [accepted]
PHST- 2013/09/11 06:00 [entrez]
PHST- 2013/09/11 06:00 [pubmed]
PHST- 2014/06/15 06:00 [medline]
AID - 10.1007/s11356-013-2122-y [pii]
AID - 10.1007/s11356-013-2122-y [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2014 Feb;21(3):2002-2008. doi: 
      10.1007/s11356-013-2122-y. Epub 2013 Sep 10.