Diffusion and sorption of hexachlorobenzene in sediments and saturated soils

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Journal of Environmental Engineering

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1999)125:8(689)· OSTI ID:680115

Deane, G; Chroneer, Z; Lick, W ^[1]

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1. Univ. of California, Santa Barbara, CA (United States). Dept. of Mechanical and Environmental Engineering

In order to understand the transport and fate of hydrophobic organic chemicals (HOCs) in consolidated sediments and saturated soils, long-term (up to 512 d), one-dimensional, time-dependent diffusion experiments were done with a representative HOC, hexachlorobenzene (HCB), in three different sediments and soils. In addition, long-term HCB partitioning experiments in suspended sediments at high concentrations and tritiated water diffusion experiments in consolidated sediments were done in order to more accurately interpret the HCB diffusion experiments. Numerical models were used to analyze the results. Good agreement between the experimental data and calculated results was obtained. Despite the length of the experiments, the experimental results demonstrate that the HCB in the consolidated sediments was far from a steady-state chemical equilibrium. Experiments and theoretical results also indicate that the assumption of local chemical equilibrium was not valid, and sorption rates must therefore be considered for a valid analysis of transport.

• OSTI ID: 680115
• Journal Information: Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 8 Vol. 125; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHLORINATED AROMATIC HYDROCARBONS
DIFFUSION
ENVIRONMENTAL TRANSPORT
SEDIMENTS
SOILS
SORPTION
SORPTIVE PROPERTIES