PMID- 26322761
OWN - NLM
STAT- MEDLINE
DCOM- 20151106
LR  - 20150901
IS  - 1477-8920 (Print)
IS  - 1477-8920 (Linking)
VI  - 13
IP  - 3
DP  - 2015 Sep
TI  - Modeling benzene permeation through drinking water high density polyethylene 
      (HDPE) pipes.
PG  - 758-72
LID - 10.2166/wh.2015.183 [doi]
AB  - Organic compounds such as benzene, toluene, ethyl benzene and o-, m-, and 
      p-xylene from contaminated soil and groundwater may permeate through 
      thermoplastic pipes which are used for the conveyance of drinking water in water 
      distribution systems. In this study, permeation parameters of benzene in 25 mm (1 
      inch) standard inside dimension ratio (SIDR) 9 high density polyethylene (HDPE) 
      pipes were estimated by fitting the measured data to a permeation model based on 
      a combination of equilibrium partitioning and Fick's diffusion. For bulk 
      concentrations between 6.0 and 67.5 mg/L in soil pore water, the 
      concentration-dependent diffusion coefficients of benzene were found to range 
      from 2.0x10(-9) to 2.8x10(-9) cm2/s while the solubility coefficient was 
      determined to be 23.7. The simulated permeation curves of benzene for SIDR 9 and 
      SIDR 7 series of HDPE pipes indicated that small diameter pipes were more 
      vulnerable to permeation of benzene than large diameter pipes, and the 
      breakthrough of benzene into the HDPE pipe was retarded and the corresponding 
      permeation flux decreased with an increase of the pipe thickness. HDPE pipes 
      exposed to an instantaneous plume exhibited distinguishable permeation 
      characteristics from those exposed to a continuous source with a constant input. 
      The properties of aquifer such as dispersion coefficients (DL) also influenced 
      the permeation behavior of benzene through HDPE pipes.
FAU - Mao, Feng
AU  - Mao F
AD  - Arizona Department of Environmental Quality, 1110 West Washington Street, 
      Phoenix, AZ 85007, USA E-mail: mf8@azdeq.gov.
FAU - Ong, Say Kee
AU  - Ong SK
AD  - Department of Civil, Construction and Environmental Engineering, Iowa State 
      University, Ames, IA 50010, USA.
FAU - Gaunt, James A
AU  - Gaunt JA
AD  - Department of Civil, Construction and Environmental Engineering, Iowa State 
      University, Ames, IA 50010, USA.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Water Health
JT  - Journal of water and health
JID - 101185420
RN  - 0 (Drinking Water)
RN  - 9002-88-4 (Polyethylene)
RN  - J64922108F (Benzene)
SB  - IM
MH  - Benzene/*analysis/*chemistry
MH  - Diffusion
MH  - Drinking Water/standards
MH  - Kinetics
MH  - Models, Chemical
MH  - Permeability
MH  - Polyethylene/*chemistry
MH  - Water Quality/standards
MH  - *Water Supply
EDAT- 2015/09/01 06:00
MHDA- 2015/11/07 06:00
CRDT- 2015/09/01 06:00
PHST- 2015/09/01 06:00 [entrez]
PHST- 2015/09/01 06:00 [pubmed]
PHST- 2015/11/07 06:00 [medline]
AID - 10.2166/wh.2015.183 [doi]
PST - ppublish
SO  - J Water Health. 2015 Sep;13(3):758-72. doi: 10.2166/wh.2015.183.