Naslov
Partitioning of selected environmental pollutants into organic matter as determined by solid-phase microextraction

Autori
Prosen, Helena ; Fingler, Sanja ; Zupančič-Kralj, Lucija ; Drevenkar, Vlasta

Izvornik
Chemosphere (0045-6535) 66 (2007), 8; 1580-1589

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
polychlorinated biphenyls; organochlorine pesticides; triazine and amide herbicides; humic acids; soil; florisil

Sažetak
Partitioning/sorption of selected environmental pollutants (PCBs, organochlorine insecticides, triazine and amide herbicides) into dissolved humic acids (HA), soil and mineral substances was evaluated by measuring their free concentrations by solid phase microextraction (SPME). Compounds were chosen to cover a wide range of logKow (2.2-7.6). Two different types of partitioning behaviour for dissolved HA were observed. Compounds with logKow>5 partitioned almost instantly into HA fraction and the remaining free fraction remained rather constant. LogKHA and logKDOC were calculated and found to be similar for commercial HA, HA standard and isolated HA. The behaviour of these compounds in soil suspension was similar, but strong sorption on CaCO3 and Florisil was also noticed. For compounds with logKow<5, we have not noticed significant changes in free concentrations in HA solutions over time. In soil suspension, however, some sorption/partitioning was observed over time for some compounds, but it was matching the sorption on CaCO3 and Florisil.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA