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Assimilable organic carbon release, ...

Connell, Matthew.

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Assimilable organic carbon release, chemical migration, and drinking water impacts of multiple brands of plastic pipes available in the USA.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Assimilable organic carbon release, chemical migration, and drinking water impacts of multiple brands of plastic pipes available in the USA./
作者:	Connell, Matthew.
面頁冊數:	50 p.
附註:	Source: Masters Abstracts International, Volume: 54-01.
Contained By:	Masters Abstracts International54-01(E).
標題:	Environmental engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1569394
ISBN:	9781321348392

Assimilable organic carbon release, chemical migration, and drinking water impacts of multiple brands of plastic pipes available in the USA.
Connell, Matthew.

Assimilable organic carbon release, chemical migration, and drinking water impacts of multiple brands of plastic pipes available in the USA. - 50 p.

Source: Masters Abstracts International, Volume: 54-01.

Thesis (M.S.)--University of South Alabama, 2014.

This item must not be sold to any third party vendors.

Increased installation of polymer potable water pipes in United States plumbing systems has created a need to thoroughly evaluate their water quality impacts. Eleven brands of new polymer drinking water pipe were evaluated for assimilable organic carbon (AOC) release at room temperature for 28 days. They included polyvinyl chloride (PVC), high-density polyethylene (HDPE), polypropylene (PP), and cross-linked polyethylene (PEX) pipes. Three of eight PEX pipe brands exceeded a 100 microg/L AOC threshold for microbial regrowth for the first exposure period and no brands exceeded this value on day 28. No detectable increase in AOC was found for PP and PEX-a1 pipes; the remaining pipe brands contributed marginal AOC levels. Water quality impacts were more fully evaluated for two brands of PEX-b and one brand of PP pipe. PEX pipes released more total organic carbon (TOC), volatile organic compounds (VOC), and semivolatile organic compounds (SVOC) and caused greater odor than the PP pipe. All three materials showed reductions in these water quality parameters over 30 days. Three PEX pipe field studies revealed that aged systems did not display more intense odors than distribution systems. However, the organic releases from polymer pipes may still alter water quality and contribute to rapid microbial growth, even though the aesthetic impacts are temporary.

ISBN: 9781321348392Subjects--Topical Terms:

548583
Environmental engineering.

Assimilable organic carbon release, chemical migration, and drinking water impacts of multiple brands of plastic pipes available in the USA.
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520 $a Increased installation of polymer potable water pipes in United States plumbing systems has created a need to thoroughly evaluate their water quality impacts. Eleven brands of new polymer drinking water pipe were evaluated for assimilable organic carbon (AOC) release at room temperature for 28 days. They included polyvinyl chloride (PVC), high-density polyethylene (HDPE), polypropylene (PP), and cross-linked polyethylene (PEX) pipes. Three of eight PEX pipe brands exceeded a 100 microg/L AOC threshold for microbial regrowth for the first exposure period and no brands exceeded this value on day 28. No detectable increase in AOC was found for PP and PEX-a1 pipes; the remaining pipe brands contributed marginal AOC levels. Water quality impacts were more fully evaluated for two brands of PEX-b and one brand of PP pipe. PEX pipes released more total organic carbon (TOC), volatile organic compounds (VOC), and semivolatile organic compounds (SVOC) and caused greater odor than the PP pipe. All three materials showed reductions in these water quality parameters over 30 days. Three PEX pipe field studies revealed that aged systems did not display more intense odors than distribution systems. However, the organic releases from polymer pipes may still alter water quality and contribute to rapid microbial growth, even though the aesthetic impacts are temporary.
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