Irreversible binding of chlorophenols to soil and its impact on bioavailability

Journal Article · Thu May 01 04:00:00 EDT 1997 · Journal of Environmental Engineering

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1997)123:5(506)· OSTI ID:495403

Bhandari, A ^[1]; Novak, J T; Berry, D F ^[2]; Burgos, W D ^[3]

---

1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Civil and Environmental Engineering
2. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
3. Pennsylvania State Univ., University Park, PA (United States). Dept. of Civil and Environmental Engineering

Experiments were conducted to quantify binding of phenol, 4-chlorophenol (4-CP), 2,4,6-trichlorophenol (TCP), and pentachlorophenol (PCP) to a sandy surface soil under aerobic and anoxic conditions, with and without autoclaving. Water and methylene chloride were used to extract the physisorbed contaminants. The chemically bound contaminant was characterized as biologically or abiotically coupled. A portion of the residual contamination on soil was attributed to the presence of a desorbable but mass transfer-rate limited component of the sorbate. Autoclaving the soil or eliminating O{sub 2} from the system had no observable effect on the total sorption of chlorophenols. However, the amount of bound material that was resistant to extraction was at least twice as high in nonautoclaved soils under oxic conditions as compared to soil in systems from which O{sub 2} or biochemical activity, or both had been eliminated. The initial aqueous concentration of the contaminant appeared to govern the amount of nonextractable material. A biodegradation study found that approximately 50% of the coupled contaminant was bioavailable.

• Sponsoring Organization: USDOE
• OSTI ID: 495403
• Journal Information: Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 5 Vol. 123; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROBIC CONDITIONS
ANAEROBIC CONDITIONS
BIOLOGICAL AVAILABILITY
CHLORINATED AROMATIC HYDROCARBONS
SOIL CHEMISTRY
SOILS