PMID- 20397412
OWN - NLM
STAT- MEDLINE
DCOM- 20100504
LR  - 20190911
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 22
IP  - 2
DP  - 2010
TI  - Selective removal of 2,4-dichlorophenoxyacetic acid from water by 
      molecularly-imprinted amino-functionalized silica gel sorbent.
PG  - 237-41
AB  - A molecularly-imprinted amino-functionalized sorbent for selective removal of 
      2,4-dichlorophenoxyacetic acid (2,4-D) was prepared by a surface imprinting 
      technique in combination with a sol-gel process. The 2,4-D-imprinted 
      amino-functionalized silica sorbent was characterized by FT-IR, nitrogen 
      adsorption and static adsorption experiments. The selectivity of the sorbent was 
      investigated by a batch competitive binding experiment using an aqueous 2,4-D and 
      2,4-dichlorophenol (2,4-DCP) mixture or using an aqueous 2,4-D and 
      2,4-dichlorophenylacetic acid (DPAC) mixture. The largest selectivity coefficient 
      for 2,4-D in the presence of 2,4-DCP was found to be over 18, the largest 
      relative selectivity coefficient between 2,4-D and 2,4-DCP over 9. The static 
      uptake capacity and selectivity coefficient of the 2,4-D-imprinted functionalized 
      sorbent are higher than those of the non-imprinted sorbent. The imprinted 
      functionalized silica gel sorbent offered a fast kinetics for the 
      extraction/stripping of 2,4-D, 73% of binding capacity (200 mg/L 2,4-D onto 20 mg 
      of imprinted sorbent) was obtained within 5 min and the adsorbed 2,4-D can be 
      easily stripped by the mixture solution of ethanol and 6 mol/L HCl (V:V = 1:1). 
      In a test of five extraction/stripping cycles, the adsorption capacity of the 
      sorbent was all above 93% of that of the fresh sorbent. Experimental result 
      showed the potential of molecularly-imprinted amino-functionalized sorbent for 
      selective removal of 2,4-D.
FAU - Han, Deman
AU  - Han D
AD  - Department of Chemistry, Taizhou University, Linhai 317000, China. hdm@tzc.edu.cn
FAU - Jia, Wenping
AU  - Jia W
FAU - Liang, Huading
AU  - Liang H
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
RN  - 2577AQ9262 (2,4-Dichlorophenoxyacetic Acid)
RN  - 60650-90-0 (Silica Gel)
RN  - 7631-86-9 (Silicon Dioxide)
SB  - IM
MH  - 2,4-Dichlorophenoxyacetic Acid
MH  - Adsorption
MH  - Hydrogen-Ion Concentration
MH  - Silica Gel
MH  - Silicon Dioxide/*chemistry
MH  - Water/*chemistry
MH  - Water Pollutants, Chemical
MH  - Water Purification
EDAT- 2010/04/20 06:00
MHDA- 2010/05/05 06:00
CRDT- 2010/04/20 06:00
PHST- 2010/04/20 06:00 [entrez]
PHST- 2010/04/20 06:00 [pubmed]
PHST- 2010/05/05 06:00 [medline]
AID - 10.1016/s1001-0742(09)60099-1 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2010;22(2):237-41. doi: 10.1016/s1001-0742(09)60099-1.