Biofilm in water pipelines; a potential source for off-flavours in the drinking water

2004 ◽  
Vol 49 (9) ◽  
pp. 211-217 ◽  
Author(s):  
I. Skjevrak ◽  
V. Lund ◽  
K. Ormerod ◽  
A. Due ◽  
H. Herikstad
Keyword(s):  
Drinking Water ◽  
Volatile Organic Compounds ◽  
Water Supply ◽  
Organic Compounds ◽  
Water Source ◽  
Raw Water ◽  
Potential Source ◽  
Volatile Organic ◽  
Water Pipelines ◽  
Water Test

Volatile organic compounds (VOC) are identified in natural biofilm established in plastic pipes used at the drinking water supply. Odour potent VOCs such as ectocarpene, dictyopterene A and C′, geosmin, beta-ionone, 6-methyl-5-hepten-2-one, menthol and menthone were prominent compounds in biofilm in the distribution network and at raw water test sites, and are associated with algae and cyanobacteria present in the raw water source.

scholarly journals Study on the change of organic matter along the Processes of Drinking Water Plant

2019 ◽  
Vol 118 ◽  
pp. 03023
Author(s):  
Shuo Zhang ◽  
Ruhua Wang
Keyword(s):  
Drinking Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Raw Water ◽  
Water Safety ◽  
Anthropogenic Pollutants ◽  
Drinking Water Safety ◽  
Water Plant ◽  
Volatile Organic ◽  
Drinking Water Purification

According to contaminated raw water and drinking water purification processes, volatile/semi-volatile organic compounds in water are determined by GC-MS. The changes of the organic along the process and water quality from unsafe to safe process were revealed. The results show that there are odorous substances such as heptanal in raw water, which are not detected after the filtration. The composition of volatile organic compounds changes a lot after the ozone activated carbon process, thus anthropogenic pollutants are no longer detected such as 5-ethyl-5-(3-hydroxy isopentyl)-barbituric acid. However, biological metabolites that are not present in raw water such as cedrenol appear. Except disinfection by-products after disinfection, there are a variety of halogenated compounds as 1-1-dichlorocyclobutane and 1-chloro-3, 3-dimethyl-butane. Some hydrocarbons and alcohols in the finished water have little impact on drinking water safety.

scholarly journals Migration of Volatile Organic Compounds (VOCs) from PEX-a Pipes into the Drinking Water during the First Five Years of Use

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 746
Author(s):  
Aino Pelto-Huikko ◽  
Merja Ahonen ◽  
Mia Ruismäki ◽  
Tuija Kaunisto ◽  
Martti Latva
Keyword(s):  
Drinking Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Water Samples ◽  
Cold Water ◽  
Butyl Alcohol ◽  
Pipe Material ◽  
Tert Butyl Alcohol ◽  
Volatile Organic ◽  
Water Pipelines

A brand-new office building in Rauma, Finland, was used to study the first five years of PEX-a drinking water pipes in normal use. Both pipe material and water samples from hot and cold-water pipelines were analyzed. Migration of volatile organic compounds (VOC) from the PEX-a pipes into the drinking water was observed to decrease rapidly during the first months. Deterioration of the PEX-a material was observed to take place due to the wearing down of organic antioxidants added into the PEX-a material during the manufacturing of the pipes. Tert-butyl alcohol (TBA) concentrations were high during the first months after commissioning of use. The stagnation time of the drinking water in contact with the PEX-a material before the actual water sample was taken had a major impact on analyzed migration of organic compounds. Hence, the amount of organic compounds able to migrate from materials into the drinking water will increase when the stagnation time increases. In this study, the water samples were taken after overnight stagnation, whereas in normal use it is advisable to run water properly before drinking it. Instructions will be needed for the average user to avoid harmful health effects.

scholarly journals Volatile organic compounds in the nation's ground water and drinking-water supply wells

Circular ◽  
2006 ◽  
Author(s):  
John S. Zogorski ◽  
Janet M. Carter ◽  
Tamara Ivahnenko ◽  
Wayne W. Lapham ◽  
Michael J. Moran ◽  
...  
Keyword(s):  
Drinking Water ◽  
Volatile Organic Compounds ◽  
Water Supply ◽  
Ground Water ◽  
Organic Compounds ◽  
Drinking Water Supply ◽  
Volatile Organic

GC-MS determination of volatile organic compounds in drinking water supplies in Mexico

2000 ◽  
Vol 15 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Silvia Gelover ◽  
Erick R. Bandala ◽  
Teresa Leal-Ascencio ◽  
Sixto P�rez ◽  
Evaristo Mart�nez
Keyword(s):  
Drinking Water ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Water Supplies ◽  
Volatile Organic
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