Effect of temperature on removal of trace organic chemicals in managed aquifer recharge systems

Handle URI:
http://hdl.handle.net/10754/564082
Title:
Effect of temperature on removal of trace organic chemicals in managed aquifer recharge systems
Authors:
Alidina, Mazahirali; Shewchuk, Justin Matthew; Drewes, Jorg
Abstract:
This study was undertaken to investigate whether changes in temperature experienced in MAR systems affect attenuation of trace organic chemicals (TOrCs). A set of laboratory-scale soil columns were placed in a temperature-controlled environmental chamber and operated at five different temperature set-points (30, 20, 10, 8 and 4. °C) covering the range of typical groundwater temperatures in cold, moderate and arid climate regions. Removal of bulk organic carbon both in the infiltration zone as well as during deeper infiltration was independent of temperature. Of the 22 TOrCs investigated, only six chemicals exhibited changes in attenuation as a function of temperature. Attenuation of four of the compounds (diclofenac, gemfibrozil, ketoprofen and naproxen) decreased as the temperature was reduced from 30. °C to 4. °C, likely due to decreased microbial activity at lower temperatures. As the temperature was decreased, however, attenuation of oxybenzone and trimethoprim were noted to increase. This increased attenuation was likely due to more efficient sorption at lower temperatures, though possible changes in the microbial composition as the temperature decreased may also have contributed to this change. Changes in rate constants of attenuation (. ka) for the biotransformed TOrCs with temperature suggested the existence of a critical temperature at 10. °C for three of the four TOrCs, where significant changes to rates of attenuation occurred. Results from this study indicated that for most TOrCs, changes in temperature do not impact their attenuation. Thus, seasonal changes in temperature are not considered to be a major concern for attenuation of most TOrCs in MAR systems.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination & Reuse Research Cntr; Environmental Science and Engineering Program
Publisher:
Elsevier BV
Journal:
Chemosphere
Issue Date:
Mar-2015
DOI:
10.1016/j.chemosphere.2014.10.064
Type:
Article
ISSN:
00456535
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAlidina, Mazahiralien
dc.contributor.authorShewchuk, Justin Matthewen
dc.contributor.authorDrewes, Jorgen
dc.date.accessioned2015-08-03T12:31:19Zen
dc.date.available2015-08-03T12:31:19Zen
dc.date.issued2015-03en
dc.identifier.issn00456535en
dc.identifier.doi10.1016/j.chemosphere.2014.10.064en
dc.identifier.urihttp://hdl.handle.net/10754/564082en
dc.description.abstractThis study was undertaken to investigate whether changes in temperature experienced in MAR systems affect attenuation of trace organic chemicals (TOrCs). A set of laboratory-scale soil columns were placed in a temperature-controlled environmental chamber and operated at five different temperature set-points (30, 20, 10, 8 and 4. °C) covering the range of typical groundwater temperatures in cold, moderate and arid climate regions. Removal of bulk organic carbon both in the infiltration zone as well as during deeper infiltration was independent of temperature. Of the 22 TOrCs investigated, only six chemicals exhibited changes in attenuation as a function of temperature. Attenuation of four of the compounds (diclofenac, gemfibrozil, ketoprofen and naproxen) decreased as the temperature was reduced from 30. °C to 4. °C, likely due to decreased microbial activity at lower temperatures. As the temperature was decreased, however, attenuation of oxybenzone and trimethoprim were noted to increase. This increased attenuation was likely due to more efficient sorption at lower temperatures, though possible changes in the microbial composition as the temperature decreased may also have contributed to this change. Changes in rate constants of attenuation (. ka) for the biotransformed TOrCs with temperature suggested the existence of a critical temperature at 10. °C for three of the four TOrCs, where significant changes to rates of attenuation occurred. Results from this study indicated that for most TOrCs, changes in temperature do not impact their attenuation. Thus, seasonal changes in temperature are not considered to be a major concern for attenuation of most TOrCs in MAR systems.en
dc.publisherElsevier BVen
dc.subjectLC-MS/MSen
dc.subjectManaged aquifer rechargeen
dc.subjectTemperatureen
dc.subjectTrace organic chemicalsen
dc.subjectWater reuseen
dc.titleEffect of temperature on removal of trace organic chemicals in managed aquifer recharge systemsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.identifier.journalChemosphereen
dc.contributor.institutionChair of Urban Water Systems Engineering, Technische Universität MünchenGarching, Germanyen
kaust.authorAlidina, Mazahiralien
kaust.authorDrewes, Jorgen
kaust.authorShewchuk, Justin Matthewen
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