Transfer of phthalates from c-polyvinyl chloride and cross-linked polyethylene pipe (PEX-b) into drinking water

dc.creatorFaust, Derek R.
dc.creatorWooten, Kimberly J.
dc.creatorSmith, Philip N.
dc.date.accessioned2021-07-28T17:23:23Z
dc.date.available2021-07-28T17:23:23Z
dc.date.issued2017
dc.descriptionCC BY 4.0en_US
dc.description.abstractSeveral different materials have been used for production of domestic water pipes throughout history. In recent years, the use of cross-linked polyethylene (PEX) pipe has increased dramatically, yet the potential for leaching of phthalates, which are endocrine disrupting compounds associated with adverse reproductive effects in humans, has not been examined. In this study, the potential of chlorinated polyvinyl chloride (cPVC) and red, blue, and heat PEX piping to leach phthalates into static hot and cold water after 2, 8, and 48 hours was evaluated. Concentrations of six phthalates, dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), benzyl-butyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP), and di(n-octyl) phthalate (DNOP), were determined by gas chromatography-mass spectrometry. Pipe type (F3,71 = 15.6, P = 0.001) contributed significantly to phthalate concentrations in water, while temperature (F4,71 = 1.74, P = 0.106) and time (F4,71 = 1.02, P = 0.427) were not significant factors. Significantly higher concentrations of DEP, DBP, and BBP were observed in cPVC pipe (<method detection limits (MDL) to 466 ng L−1, 252–4,219 ng L−1, 473–18,400 ng L−1, respectively) compared to blue PEX (T2 = 12.2, P < 0.001; <MDL, <MDL − 140 ng L−1, <MDL − 459 ng L−1, respectively), red PEX (T2 = 19.3, P < 0.001; <MDL, <MDL − 188 ng L−1, <MDL − 881 ng L−1, respectively), and heat PEX (T2 = 19.9, P < 0.001; <MDL, <MDL − 162 ng L−1, <MDL − 169 ng L−1, respectively). Phthalate exposure from drinking water via cPVC or PEX is low when compared to other dietary sources. Nonetheless, a shift from cPVC to PEX pipes in households would decrease potential exposure to phthalates.en_US
dc.identifier.citationDerek R. Faust, Kimberly J. Wooten, Philip N. Smith; Transfer of phthalates from c-polyvinyl chloride and cross-linked polyethylene pipe (PEX-b) into drinking water. Water Supply 1 March 2017; 17 (2): 588–596. doi: https://doi.org/10.2166/ws.2016.164en_US
dc.identifier.urihttps://doi.org/10.2166/ws.2016.164
dc.identifier.urihttps://hdl.handle.net/2346/87425
dc.language.isoengen_US
dc.publisherIWA Publishingen_US
dc.subjectCross-Linked Polyethyleneen_US
dc.subjectDrinking Wateren_US
dc.subjectLeachingen_US
dc.subjectPhthalatesen_US
dc.subjectPipeen_US
dc.titleTransfer of phthalates from c-polyvinyl chloride and cross-linked polyethylene pipe (PEX-b) into drinking wateren_US
dc.typeArticleen_US

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