PMID- 16469360
OWN - NLM
STAT- MEDLINE
DCOM- 20060818
LR  - 20121115
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 64
IP  - 3
DP  - 2006 Jun
TI  - Biodegradation of 2,4,6-trichlorophenol and associated hydraulic conductivity 
      reduction in sand-bed columns.
PG  - 339-49
AB  - The aim of this research was to investigate the long-term hydraulic conductivity 
      changes in sand-bed columns exposed to 2,4,6-trichlorophenol (TCP). Continuous 
      flow laboratory studies were conducted using sand-bed columns (15 cm i.d.; 200 cm 
      length) at 20+/-1 degrees C during 365 d. The influence of (i) initial loads of 
      2,4,6-TCP (15, 30, 45 and 60 mg kg(-1) of 2,4,6-TCP), and (ii) recirculating 
      water velocity (0.09, 0.56 and 1.18 cm min(-1)) on the biodegradation of 
      2,4,6-TCP and hydraulic conductivity changes in the sand-bed columns were 
      investigated. The experimental results indicated that biodegradation of 2,4,6-TCP 
      followed pseudo-first-order kinetics in the range of k(1)=0.01-1.64 d(-1), and it 
      was influenced by initial load (p<0.01) and recirculating water velocity 
      (p<0.01). Indigenous microbial biomass growth and changes resulted in a spatial 
      (180 cm) and temporal (365 d) reduction of hydraulic conductivity in the sand-bed 
      columns by up to two orders of magnitude during biodegradation of 2,4,6-TCP. The 
      fastest hydraulic conductivity reductions were observed in the sand-bed column 
      operated at the highest recirculating water velocity and highest cumulative load 
      of 2,4,6-TCP following 365 d of continuous treatment (p<0.05).
FAU - Antizar-Ladislao, Blanca
AU  - Antizar-Ladislao B
AD  - Imperial College London, Wye campus, Wye, Ashford, Kent TN25 5AH, UK. 
      b.antizar@imperial.ac.uk
FAU - Galil, Noah I
AU  - Galil NI
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20060215
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Chlorophenols)
RN  - 0 (Water Pollutants, Chemical)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Biodegradation, Environmental
MH  - *Biofilms/growth & development
MH  - Biomass
MH  - Chlorophenols/*analysis
MH  - Electric Conductivity
MH  - Flame Ionization
MH  - *Models, Chemical
MH  - Porosity
MH  - *Silicon Dioxide
MH  - Water Pollutants, Chemical/*analysis
EDAT- 2006/02/14 09:00
MHDA- 2006/08/19 09:00
CRDT- 2006/02/14 09:00
PHST- 2005/09/06 00:00 [received]
PHST- 2005/12/18 00:00 [revised]
PHST- 2005/12/20 00:00 [accepted]
PHST- 2006/02/14 09:00 [pubmed]
PHST- 2006/08/19 09:00 [medline]
PHST- 2006/02/14 09:00 [entrez]
AID - S0045-6535(05)01463-3 [pii]
AID - 10.1016/j.chemosphere.2005.12.047 [doi]
PST - ppublish
SO  - Chemosphere. 2006 Jun;64(3):339-49. doi: 10.1016/j.chemosphere.2005.12.047. Epub 
      2006 Feb 15.