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The effects of a dilute (ionic strength = 5 × 10−3 M) plume of treated sewage, with elevated levels (3.9 mg/L) of dissolved organic carbon (DOC), upon the pH-dependency and magnitude of bacterial transport through an iron-laden, quartz sand aquifer (Cape Cod, MA) were evaluated using sets of replicate, static minicolumns. Compared with uncontaminated groundwater, the plume chemistry diminished bacterial attachment under mildly acidic (pH 5.0–6.5) in-situ conditions, in spite of the 5-fold increase in ionic strength and substantively enhanced attachment under more alkaline conditions. The effects of the hydrophobic neutral and total fractions of the plume DOC; modest concentrations of fulvic and humic acids (1.5...
Categories: Publication;
Types: Citation;
Tags: Aquifer,
Attachment,
Bacteria,
Calcium,
DOC, All tags...
Groundwater,
NOM,
Organic contaminants,
Plume,
Quartz sand,
Static minicolumns,
Subsurface,
Sulfate,
Transport,
Treated sewage,
pH, Fewer tags
The effects of a dilute (ionic strength = 5 × 10−3 M) plume of treated sewage, with elevated levels (3.9 mg/L) of dissolved organic carbon (DOC), upon the pH-dependency and magnitude of bacterial transport through an iron-laden, quartz sand aquifer (Cape Cod, MA) were evaluated using sets of replicate, static minicolumns. Compared with uncontaminated groundwater, the plume chemistry diminished bacterial attachment under mildly acidic (pH 5.0–6.5) in-situ conditions, in spite of the 5-fold increase in ionic strength and substantively enhanced attachment under more alkaline conditions. The effects of the hydrophobic neutral and total fractions of the plume DOC; modest concentrations of fulvic and humic acids (1.5...
Categories: Publication;
Types: Citation;
Tags: Aquifer,
Attachment,
Bacteria,
Calcium,
DOC, All tags...
Groundwater,
NOM,
Organic contaminants,
Plume,
Quartz sand,
Static minicolumns,
Subsurface,
Sulfate,
Transport,
Treated sewage,
pH, Fewer tags
The effects of a dilute (ionic strength = 5 × 10−3 M) plume of treated sewage, with elevated levels (3.9 mg/L) of dissolved organic carbon (DOC), upon the pH-dependency and magnitude of bacterial transport through an iron-laden, quartz sand aquifer (Cape Cod, MA) were evaluated using sets of replicate, static minicolumns. Compared with uncontaminated groundwater, the plume chemistry diminished bacterial attachment under mildly acidic (pH 5.0–6.5) in-situ conditions, in spite of the 5-fold increase in ionic strength and substantively enhanced attachment under more alkaline conditions. The effects of the hydrophobic neutral and total fractions of the plume DOC; modest concentrations of fulvic and humic acids (1.5...
Categories: Publication;
Types: Citation;
Tags: Aquifer,
Attachment,
Bacteria,
Calcium,
DOC, All tags...
Groundwater,
NOM,
Organic contaminants,
Plume,
Quartz sand,
Static minicolumns,
Subsurface,
Sulfate,
Transport,
Treated sewage,
pH, Fewer tags
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