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Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment

Mass balances are an instructive means for investigating the fate of chemicals during wastewater treatment. In addition to the aqueous-phase removal efficiency (Φ), they can inform on chemical partitioning, transformation, and persistence, as well as on the chemical loading to streams and soils rece...

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Detalles Bibliográficos
Autores principales: Heidler, Jochen, Halden, Rolf U.
Formato: Texto
Lenguaje:English
Publicado: American Chemical Society 2008
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2665886/
https://www.ncbi.nlm.nih.gov/pubmed/18800497
http://dx.doi.org/10.1021/es703008y
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author Heidler, Jochen
Halden, Rolf U.
author_facet Heidler, Jochen
Halden, Rolf U.
author_sort Heidler, Jochen
collection PubMed
description Mass balances are an instructive means for investigating the fate of chemicals during wastewater treatment. In addition to the aqueous-phase removal efficiency (Φ), they can inform on chemical partitioning, transformation, and persistence, as well as on the chemical loading to streams and soils receiving, respectively, treated effluent and digested sewage sludge (biosolids). Release rates computed on a per-capita basis can serve to extrapolate findings to a larger scale. This review examines over a dozen mass balances conducted for various organic wastewater contaminants, including prescription drugs, estrogens, fragrances, antimicrobials, and surfactants of differing sorption potential (hydrophobicity), here expressed as the 1-octanol−water partition coefficient (K(OW)) and the organic carbon normalized sorption coefficient (K(OC)). Major challenges to mass balances are the collection of representative samples and accurate quantification of chemicals in sludge. A meta-analysis of peer-reviewed data identified sorption potential as the principal determinant governing chemical persistence in biosolids. Occurrence data for organic wastewater compounds detected in digested sludge followed a simple nonlinear model that required only K(OW) or K(OC) as the input and yielded a correlation coefficient of 0.9 in both instances. The model predicted persistence in biosolids for the majority (>50%) of the input load of organic wastewater compounds featuring a log(10)K(OW) value of greater than 5.2 (log(10)K(OC) > 4.4). In contrast, hydrophobicity had no or only limited value for estimating, respectively, Φ and the overall persistence of a chemical during conventional wastewater treatment.
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spelling pubmed-26658862009-04-06 Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment Heidler, Jochen Halden, Rolf U. Environ Sci Technol Mass balances are an instructive means for investigating the fate of chemicals during wastewater treatment. In addition to the aqueous-phase removal efficiency (Φ), they can inform on chemical partitioning, transformation, and persistence, as well as on the chemical loading to streams and soils receiving, respectively, treated effluent and digested sewage sludge (biosolids). Release rates computed on a per-capita basis can serve to extrapolate findings to a larger scale. This review examines over a dozen mass balances conducted for various organic wastewater contaminants, including prescription drugs, estrogens, fragrances, antimicrobials, and surfactants of differing sorption potential (hydrophobicity), here expressed as the 1-octanol−water partition coefficient (K(OW)) and the organic carbon normalized sorption coefficient (K(OC)). Major challenges to mass balances are the collection of representative samples and accurate quantification of chemicals in sludge. A meta-analysis of peer-reviewed data identified sorption potential as the principal determinant governing chemical persistence in biosolids. Occurrence data for organic wastewater compounds detected in digested sludge followed a simple nonlinear model that required only K(OW) or K(OC) as the input and yielded a correlation coefficient of 0.9 in both instances. The model predicted persistence in biosolids for the majority (>50%) of the input load of organic wastewater compounds featuring a log(10)K(OW) value of greater than 5.2 (log(10)K(OC) > 4.4). In contrast, hydrophobicity had no or only limited value for estimating, respectively, Φ and the overall persistence of a chemical during conventional wastewater treatment. American Chemical Society 2008-07-22 2008-09-01 /pmc/articles/PMC2665886/ /pubmed/18800497 http://dx.doi.org/10.1021/es703008y Text en Copyright © 2008 American Chemical Society http://pubs.acs.org This is an open-access article distributed under the ACS AuthorChoice Terms & Conditions. Any use of this article, must conform to the terms of that license which are available at http://pubs.acs.org. 40.75
spellingShingle Heidler, Jochen
Halden, Rolf U.
Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title_full Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title_fullStr Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title_full_unstemmed Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title_short Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment
title_sort meta-analysis of mass balances examining chemical fate during wastewater treatment
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2665886/
https://www.ncbi.nlm.nih.gov/pubmed/18800497
http://dx.doi.org/10.1021/es703008y
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