Competitive adsorption of aromatic nitrogen bases on subsurface materials

Conference · Sat Aug 01 04:00:00 EDT 1987

OSTI ID:5632035

Zachara, J M; Thomas, B L

The inorganic sorbate pairs quinoline-acridine and quinoline-pyridine were contacted at micromolar concentrations with two low-organic subsoils to determine if competitive sorption occurred. Using quinolines as the reference compound, competition was observed between sorbates in the acidic subsoil when the soil-water pH promoted compound ionization. Pyridine and quinoline mutually competed while acridines sorbed independently. Acridine was the least soluble and most strongly adsorbed compound and induced the greatest reduction in quinoline binding. Competitive sorption was minimal in the higher pH subsoil where the compounds are neutral. It is suggested that competition occurred between the protonated species for a subset of reactive charged sites that exhibited high affinity for the organic cations. 17 refs., 7 figs., 3 tabs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5632035
• Report Number(s): PNL-SA-13393; CONF-851027-14; ON: DE88000992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACRIDINES
ADSORPTION
AFFINITY
AROMATICS
AZAARENES
AZINES
CHEMICAL WASTES
CONTAMINATION
HETEROCYCLIC COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
PYRIDINE
PYRIDINES
QUINOLINES
SOILS
SOLUTES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WASTES