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Fate of Volatile Organic Compounds in Constructed Wastewater Treatment Wetlands

Environmental Science and Technology

By:
, , , and
DOI: 10.1021/es034661i

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Abstract

The fate of volatile organic compounds was evaluated in a wastewater-dependent constructed wetland near Phoenix, AZ, using field measurements and solute transport modeling. Numerically based volatilization rates were determined using inverse modeling techniques and hydraulic parameters established by sodium bromide tracer experiments. Theoretical volatilization rates were calculated from the two-film method incorporating physicochemical properties and environmental conditions. Additional analyses were conducted using graphically determined volatilization rates based on field measurements. Transport (with first-order removal) simulations were performed using a range of volatilization rates and were evaluated with respect to field concentrations. The inverse and two-film reactive transport simulations demonstrated excellent agreement with measured concentrations for 1,4-dichlorobenzene, tetrachloroethene, dichloromethane, and trichloromethane and fair agreement for dibromochloromethane, bromo-dichloromethane, and toluene. Wetland removal efficiencies from inlet to outlet ranged from 63% to 87% for target compounds.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fate of Volatile Organic Compounds in Constructed Wastewater Treatment Wetlands
Series title:
Environmental Science and Technology
DOI:
10.1021/es034661i
Volume
38
Issue:
7
Year Published:
2004
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Science and Technology
First page:
2209
Last page:
2216
Number of Pages:
8