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EC number: 204-427-5
CAS number: 120-80-9
The adsorption potential of catechol was
studied according to the batch equilibrium method (OECD guideline 106),
except that only one soil type was used. It was a clay loam soil
containing 5.10% of organic matter and presenting a pH of 5.7 and a
cation exchange capacity of 22.22 meq/100 g. A 1:10 soil:solution ratio
was used together with five catechol concentrations (5, 10, 20, 30 and
50 ppm). Based on preliminary experiment, an equilibration period of 24
hours was applied. after 24 hours, the samples were collected and
analyzed using HPLC. Measurements concluded to a Koc of 118.44 and a Log
Koc of 2.07; implying that catechol is not considered as presenting a
strong binding behaviour to particles of a clay loam soil.
Catechol is not considered as presenting a strong binding behaviour to organic or mineral soils.
Two studies are available (Boyd, 1982;
Haderlein & Schwarzenbach, 1993). The first of them, scored as
reliability 2 according to Klimisch, was flagged as a key study. It was
performed accordingly to OECD guideline 106, except that one soil type
was used. A Koc value of 118.44 and an associated Log Koc of 2.07 were
reported; implying that catechol is not considered as presenting a
strong binding behaviour to soil organic particles. The second study,
also scored as Klimisch 2, investigated the adsorption potential of
catechol to mineral surfaces. A Kd value of 25 L/kg was reported;
supporting a low potential for adsorption in mineral soils also. This
study was selected as a supporting study.
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