Sorption of chlorobenzenes to mineralizing phytoplankton

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1002/etc.5620120811· OSTI ID:7017091

Koelmans, A A; Lijklema, L ^[1]; Jimenez, C S ^[2]

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1. Wageningen Agricultural Univ. (Netherlands). Dept. of Nature Conservation
2. Univ. of Salamanca (Spain). Dept. of Physical Chemistry

The influence of mineralization of phytoplankton (laboratory Scenedesmus spp.) on the desorption characteristics of 1,2,3,4-tetrachlorobenzene (TeCB) and hexachlorobenzene (HCB) was studied using a purge and trap method. For comparison several field samples, including a sediment, algae at different growth stages, and freeze-dried algae, were used. The desorption characteristics were evaluated using multiple box models similar to those generally used for desorption from sediments. It was found for all adsorbent that the desorption could adequately be described using a two-compartment nonequilibrium biosorption model. Generally, HCB was bound more strongly and released more slowly than TeCB. Aging and mineralization of unicell and coenobian forms of the algal species resulted in a significant 60 to 100% increase of OC-normalized partition coefficients. Generally, sorption affinity as quantified by the OC-normalized partition coefficient (K[sub oc]) was lower, and desorption kinetics faster for algae than for soils and sediments. Evaluation of the biosorption rate parameters using a log k[sub 2] vs. log K[sub p] plot showed that in contrast to sediments and soils, no clear inverse relationship between K[sub p] and k[sub 2] exists. A bioconcentration experiment with four chlorobenzenes showed good agreement with the sorption parameters measured with the purge method, and showed a linear correlation of the bioconcentration factor with the octanol/water partition coefficient.

• OSTI ID: 7017091
• Journal Information: Environmental Toxicology and Chemistry; (United States), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 12:8; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AQUATIC ORGANISMS
AROMATICS
CHLORINATED AROMATIC HYDROCARBONS
ENVIRONMENTAL TRANSPORT
HALOGENATED AROMATIC HYDROCARBONS
MASS TRANSFER
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYTOPLANKTON
PLANKTON
PLANTS
POLLUTION
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WATER POLLUTION