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Description: Book cover
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?
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Description: Book cover
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?

Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?

Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?

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Description: Book cover
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?
Abstract
The Fresno-Clovis Regional Water Reclamation Facilities discharge effluent to percolation ponds. Arsenic and manganese have been detected at concentrations greater than their MCLs in the downgradient groundwater. Core sampling and wet/dry pond cycling studies were conducted to better understand the processes that lead to these conditions, and to investigate strategies to decrease concentrations of arsenic and manganese in the groundwater. Core sampling studies showed the presence of alluvial arsenic and manganese. Modest decreases in arsenic concentrations were observed in the groundwater after a half-year of pond cycling, but no changes were observed in manganese concentrations. Low groundwater concentrations of metals were correlated with high concentrations of nitrate, and vice versa. These results support the hypothesis that reducing conditions caused by the effluent are responsible for mobilizing alluvial arsenic and manganese. However, when the groundwater migrates offsite and is reoxidized, the metals are removed from the plume.
The Fresno-Clovis Regional Water Reclamation Facilities discharge effluent to percolation ponds. Arsenic and manganese have been detected at concentrations greater than their MCLs in the downgradient groundwater. Core sampling and wet/dry pond cycling studies were conducted to better understand the processes that lead to these conditions, and to investigate strategies to decrease concentrations of...
Author(s)
Lorien FonoRosa Lau-StaggsMohammad MoaddabPenny Carlo
SourceProceedings of the Water Environment Federation
SubjectSession 29 - Mobilization and Leading Edge Treatment of Metals and Inorganic Pollutants for Ground and Surface Water Protection
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Jan, 2009
ISSN1938-6478
SICI1938-6478(20090101)2009:16L.1533;1-
DOI10.2175/193864709793956239
Volume / Issue2009 / 16
Content sourceWEFTEC
First / last page(s)1533 - 1541
Copyright2009
Word count163
Subject keywordsArsenicmanganesepond cyclingland dischargegroundwater contaminationredox conditions

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Description: Book cover
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?
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Description: Book cover
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?
Abstract
The Fresno-Clovis Regional Water Reclamation Facilities discharge effluent to percolation ponds. Arsenic and manganese have been detected at concentrations greater than their MCLs in the downgradient groundwater. Core sampling and wet/dry pond cycling studies were conducted to better understand the processes that lead to these conditions, and to investigate strategies to decrease concentrations of arsenic and manganese in the groundwater. Core sampling studies showed the presence of alluvial arsenic and manganese. Modest decreases in arsenic concentrations were observed in the groundwater after a half-year of pond cycling, but no changes were observed in manganese concentrations. Low groundwater concentrations of metals were correlated with high concentrations of nitrate, and vice versa. These results support the hypothesis that reducing conditions caused by the effluent are responsible for mobilizing alluvial arsenic and manganese. However, when the groundwater migrates offsite and is reoxidized, the metals are removed from the plume.
The Fresno-Clovis Regional Water Reclamation Facilities discharge effluent to percolation ponds. Arsenic and manganese have been detected at concentrations greater than their MCLs in the downgradient groundwater. Core sampling and wet/dry pond cycling studies were conducted to better understand the processes that lead to these conditions, and to investigate strategies to decrease concentrations of...
Author(s)
Lorien FonoRosa Lau-StaggsMohammad MoaddabPenny Carlo
SourceProceedings of the Water Environment Federation
SubjectSession 29 - Mobilization and Leading Edge Treatment of Metals and Inorganic Pollutants for Ground and Surface Water Protection
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Jan, 2009
ISSN1938-6478
SICI1938-6478(20090101)2009:16L.1533;1-
DOI10.2175/193864709793956239
Volume / Issue2009 / 16
Content sourceWEFTEC
First / last page(s)1533 - 1541
Copyright2009
Word count163
Subject keywordsArsenicmanganesepond cyclingland dischargegroundwater contaminationredox conditions

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Lorien Fono# Rosa Lau-Staggs# Mohammad Moaddab# Penny Carlo. Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?. Alexandria, VA 22314-1994, USA: Water Environment Federation, 2018. Web. 11 Oct. 2025. <https://www.accesswater.org?id=-296392CITANCHOR>.
Lorien Fono# Rosa Lau-Staggs# Mohammad Moaddab# Penny Carlo. Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?. Alexandria, VA 22314-1994, USA: Water Environment Federation, 2018. Accessed October 11, 2025. https://www.accesswater.org/?id=-296392CITANCHOR.
Lorien Fono# Rosa Lau-Staggs# Mohammad Moaddab# Penny Carlo
Mobilization of Arsenic and Manganese In the Soil-aquifer System Due to Wastewater Percolation - A Manageable Problem?
Access Water
Water Environment Federation
December 22, 2018
October 11, 2025
https://www.accesswater.org/?id=-296392CITANCHOR