PMID- 27364487
OWN - NLM
STAT- MEDLINE
DCOM- 20170227
LR  - 20181202
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 23
IP  - 19
DP  - 2016 Oct
TI  - Sorption of chlorophenols on microporous minerals: mechanism and influence of 
      metal cations, solution pH, and humic acid.
PG  - 19266-80
LID - 10.1007/s11356-016-7128-9 [doi]
AB  - Sorption of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), and 
      2,4,6-trichlorophenol (2,4,6-TCP) on a range of dealuminated zeolites were 
      investigated to understand the mechanism of their sorption on microporous 
      minerals, while the influence of common metal cations, solution pH, and humic 
      acid was also studied. Sorption of chlorophenols was found to increase with the 
      hydrophobicity of the sorbates and that of the microporous minerals, indicating 
      the important role of hydrophobic interactions, while sorption was also stronger 
      in the micropores of narrower sizes because of greater enhancement of the 
      dispersion interactions. The presence of metal cations could enhance chlorophenol 
      sorption due to the additional electrostatic attraction between metal cations 
      exchanged into the mineral micropores and the chlorophenolates, and this effect 
      was apparent on the mineral sorbent with a high density of surface cations (2.62 
      sites/nm(2)) in its micropores. Under circum-neutral or acidic conditions, 
      neutral chlorophenol molecules adsorbed into the hydrophobic micropores through 
      displacing the "loosely bound" water molecules, while their sorption was 
      negligible under moderately alkaline conditions due to electrostatic repulsion 
      between the negatively charged zeolite framework and anionic chlorophenolates. 
      The influence of humic acid on sorption of chlorophenols on dealuminated Y 
      zeolites suggests that its molecules did not block the micropores but created a 
      secondary sorption sites by forming a "coating layer" on the external surface of 
      the zeolites. These mechanistic insights could help better understand the 
      interactions of ionizable chlorophenols and metal cations in mineral micropores 
      and guide the selection and design of reusable microporous mineral sorbents for 
      sorptive removal of chlorophenols from aqueous stream.
FAU - Yang, Hui
AU  - Yang H
AD  - State Key Laboratory of Organic Geochemistry, Guangzhou Institute of 
      Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
AD  - University of Chinese Academy of Sciences, Beijing, 100049, China.
FAU - Hu, Yuanan
AU  - Hu Y
AD  - School of Water Resources and Environment, China University of Geosciences 
      (Beijing), Beijing, 100083, China.
FAU - Cheng, Hefa
AU  - Cheng H
AD  - MOE Laboratory for Earth Surface Processes, College of Urban and Environmental 
      Sciences, Peking University, Beijing, 100871, China. hefac@umich.edu.
LA  - eng
PT  - Journal Article
DEP - 20160630
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 (Environmental Pollutants)
RN  - 0 (Humic Substances)
RN  - 0 (Minerals)
RN  - 0 (Solutions)
RN  - 1318-02-1 (Zeolites)
RN  - 789U1901C5 (Copper)
RN  - E1UOL152H7 (Iron)
RN  - K9KAV4K6BN (2-chlorophenol)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Adsorption
MH  - Cations/chemistry
MH  - Chlorophenols/*chemistry
MH  - Copper/chemistry
MH  - Environmental Pollutants/*chemistry
MH  - Humic Substances/analysis
MH  - Hydrogen-Ion Concentration
MH  - Hydrophobic and Hydrophilic Interactions
MH  - Iron/chemistry
MH  - Minerals/chemistry
MH  - Porosity
MH  - Solutions
MH  - Zeolites/*chemistry
OTO - NOTNLM
OT  - Chlorophenol
OT  - Humic acid
OT  - Hydrophobic effect
OT  - Metal cations
OT  - Microporous minerals
OT  - Sorption
EDAT- 2016/07/02 06:00
MHDA- 2017/02/28 06:00
CRDT- 2016/07/02 06:00
PHST- 2016/02/09 00:00 [received]
PHST- 2016/06/20 00:00 [accepted]
PHST- 2016/07/02 06:00 [entrez]
PHST- 2016/07/02 06:00 [pubmed]
PHST- 2017/02/28 06:00 [medline]
AID - 10.1007/s11356-016-7128-9 [pii]
AID - 10.1007/s11356-016-7128-9 [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2016 Oct;23(19):19266-80. doi: 
      10.1007/s11356-016-7128-9. Epub 2016 Jun 30.