PMID- 20390956
OWN - NLM
STAT- MEDLINE
DCOM- 20100712
LR  - 20131121
IS  - 1532-4109 (Electronic)
IS  - 0360-1234 (Linking)
VI  - 45
IP  - 3
DP  - 2010 Apr
TI  - Reductive transformation of 2,4-dichlorophenoxyacetic acid by nanoscale and 
      microscale Fe3O4 particles.
PG  - 233-41
LID - 10.1080/10934520903430020 [doi]
AB  - Reductive transformation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nanoscale 
      and microscale Fe(3)O(4) was investigated and compared. Disappearance of the 
      parent species and formation of reaction intermediates and products were 
      kinetically analyzed. Results suggest that the transformation of 2,4-D followed a 
      primary pathway of its complete reduction to phenol and a secondary pathway of 
      sequential reductive hydrogenolysis to 2,4-dichlorophenol (2,4-DCP), chlorophenol 
      (2-CP, 4-CP) and phenol. About 65% of 2,4-D with initial concentration of 50 
      micro M was transformed within 48 h in the presence of 300 mg L(-1) nanoscale 
      Fe(3)O(4), and the reaction rates increased with increasing dosage of nanoscale 
      Fe(3)O(4). The decomposition of 2,4-D proceeded rapidly at optimum pH 3.0. 
      Chloride was identified as a reduction product for 2,4-D in the magnetite-water 
      system. Reductive transformation of 2,4-D by microscale Fe(3)O(4) was slower than 
      that by nanoscale Fe(3)O(4). The reactions apparently followed pseudo-first-order 
      kinetics with respect to the 2,4-D transformation. The degradation rate of 2,4-D 
      decreased with the increase of initial 2,4-D concentration. In addition, anions 
      had a significant adverse impact on the degradation efficiency of 2,4-D.
FAU - Si, You B
AU  - Si YB
AD  - School of Resources and Environment, Anhui Agricultural University, Hefei, China.
FAU - Fang, Guo D
AU  - Fang GD
FAU - Zhou, Jing
AU  - Zhou J
FAU - Zhou, Dong M
AU  - Zhou DM
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Environ Sci Health B
JT  - Journal of environmental science and health. Part. B, Pesticides, food 
      contaminants, and agricultural wastes
JID - 7607167
RN  - 0 (Ferric Compounds)
RN  - 0 (Water Pollutants, Chemical)
RN  - 2577AQ9262 (2,4-Dichlorophenoxyacetic Acid)
RN  - 4R7X1O2820 (Chlorine)
SB  - IM
MH  - 2,4-Dichlorophenoxyacetic Acid/*chemistry
MH  - Chlorine/chemistry
MH  - Ferric Compounds/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Metal Nanoparticles/*chemistry/ultrastructure
MH  - Microscopy, Electron, Scanning
MH  - Nanoparticles
MH  - Oxidation-Reduction
MH  - Surface Properties
MH  - Water Pollutants, Chemical/*chemistry
MH  - Water Purification/*methods
EDAT- 2010/04/15 06:00
MHDA- 2010/07/14 06:00
CRDT- 2010/04/15 06:00
PHST- 2010/04/15 06:00 [entrez]
PHST- 2010/04/15 06:00 [pubmed]
PHST- 2010/07/14 06:00 [medline]
AID - 919880413 [pii]
AID - 10.1080/10934520903430020 [doi]
PST - ppublish
SO  - J Environ Sci Health B. 2010 Apr;45(3):233-41. doi: 10.1080/10934520903430020.