Model studies of corrosion induced copper runoff fate in soil

• Laboratory experiments have been performed with 3-cm soil columns simulating the fate of corrosion-induced copper runoff in contact with soil. The investigation simulates approximately 30 years (assuming an infiltration surplus of 25 cm/year) of continuous percolation of copper containing runoff water of a concentration realistic at the immediate release situation (4.8 mg/L) into four soils representative of urban conditions. Two of the three investigated topsoils reached their breakthrough of copper within the simulated time, while the third topsoil did not show a breakthrough. The subsoil reached a breakthrough after approximately 10 years of simulated exposure. To simulate more realistic outdoor scenarios, the laboratory-obtained breakthrough curves were modeled with Hydrus-1D (R) using a Langmuir-Freundlich model to describe copper sorption, the parameters of which were estimated from soil properties (pH, organic carbon content). The model predicts longer breakthrough times with increasing pH and organic content of the soil and with decreasing concentrations of copper and dissolved organic carbon in the runoff water. The time span for copper in runoff water (at concentrations of 0.01-10 mg/L) to reach a soil depth of 50 cm varied between 170 and more than 8,000 years for the predicted field scenarios.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Annan naturresursteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Other Environmental Engineering (hsv//eng)

Keyword

Copper

Hydrus-1D

Risk assessment

Runoff

Solute transport

Computer simulation

Mathematical models

pH effects

Risk assessment

Runoff

Hydrus-ID

Solute transport

Soils

organic carbon

runoff

environmental fate

runoff

solute transport

chemical composition

concentration (parameters)

conference paper

corrosion

environmental impact

environmental parameters

model

pH

prediction

priority journal

risk assessment

sediment transport

simulation

soil analysis

soil pollution

soil property

Agriculture

Environmental Monitoring

Environmental Pollutants

Hydrogen-Ion Concentration

Rain

Risk

Risk Assessment

Soil

Soil Pollutants

Sweden

Time Factors

Water

Water Movements

Environmental engineering

Miljöteknik

Publication and Content Type

ref (subject category)

art (subject category)