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Transport and fate of organic wastew...

Wilcox, Jeffrey Douglas.

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Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions./
作者:	Wilcox, Jeffrey Douglas.
面頁冊數:	183 p.
附註:	Adviser: Jean M. Bahr.
Contained By:	Dissertation Abstracts International68-08B.
標題:	Engineering, Sanitary and Municipal. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3278899
ISBN:	9780549198512

Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions.
Wilcox, Jeffrey Douglas.

Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions. - 183 p.

Adviser: Jean M. Bahr.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2007.

Household chemicals have been detected in domestic wastewater, streams, lakes, and groundwater, and there is concern that even low doses of some compounds may pose long-term risks to nontarget organisms. On-site wastewater treatment systems discharge more than a trillion gallons to the subsurface each year in the United States (U.S. EPA, 2002), and the use of septic systems is increasing as more rural residential subdivisions are developed. This research project incorporated field investigations, laboratory experiments, and numerical modeling to develop a better understanding of processes and conditions that control the transport and fate of organic wastewater contaminants (OWCs) from on-site wastewater treatment systems and to assess the implications for unsewered development.

ISBN: 9780549198512Subjects--Topical Terms:

1018731
Engineering, Sanitary and Municipal.

Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions.
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245 1 0 $a Transport and fate of organic wastewater contaminants beneath unsewered residential subdivisions.
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520 $a Household chemicals have been detected in domestic wastewater, streams, lakes, and groundwater, and there is concern that even low doses of some compounds may pose long-term risks to nontarget organisms. On-site wastewater treatment systems discharge more than a trillion gallons to the subsurface each year in the United States (U.S. EPA, 2002), and the use of septic systems is increasing as more rural residential subdivisions are developed. This research project incorporated field investigations, laboratory experiments, and numerical modeling to develop a better understanding of processes and conditions that control the transport and fate of organic wastewater contaminants (OWCs) from on-site wastewater treatment systems and to assess the implications for unsewered development.
520 $a Estrogenic activity and six organic wastewater contaminants were detected in septic-effluent samples from 15 households in southeastern Wisconsin at part-per-trillion to part-per-billion concentrations. Results from field tracer tests and laboratory column experiments showed that sorption and/or degradation of OWCs beneath septic leach fields can be significant. The subsurface mobility of OWCs appears to be controlled by a combination of compound-specific properties and site-specific aquifer conditions.
520 $a Sorption coefficients measured in this study (0-9 L/kg) were generally lower than those reported in previous studies, owing to the low clay and organic carbon content of glacial sediments typically found in southern Wisconsin. Transport model results indicated that even relatively-low sorption coefficients can result in significant compound retardation in the subsurface and that most compounds would take years to reach downgradient wells. Considering these long transport times in the subsurface, only compounds that are very stable (resistant to degradation) would be expected to significantly impact groundwater quality. For compounds that are stable and mobile, it is unlikely that minimum separation distances alone can prevent cross-contamination between septic systems and private wells. Thus, addressing well construction, not subdivision design or well location, appears to be the best way to protect drinking -water quality from OWCs in unsewered areas.
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