TY - JOUR
T1 - Lipid-water partition coefficients and correlations with uptakes by algae of organic compounds
AU - Hung, Wei Nung
AU - Chiou, Cary T.
AU - Lin, Tsair Fuh
N1 - Funding Information:
This work is supported by the National Science Council of Taiwan ( NSC 99-2221-E-006-053 ), the National Cheng Kung University Project ( D101-33B01 ), and the Industrial Technology Research Institute Project ( CF55RN8000 ). We thank Ms. Chin-Fang Tsai and Ms. Yu-Shi Liu for their technical assistance.
PY - 2014/8/30
Y1 - 2014/8/30
N2 - In view of the scarcity of the lipid-water partition coefficients (Ktw) for organic compounds, the logKtw values for many environmental contaminants were measured using ultra-pure triolein as the model lipid. Classes of compounds studied include alkyl benzenes, halogenated benzenes, short-chain chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and organochlorine pesticides. In addition to logKtw determination, the uptakes of these compounds from water by a dry algal species were measured to evaluate the lipid effect on the algal uptake. The measured logKtw are closely related to their respective logKow (octanol-water), with logKow=1.9 to 6.5. A significant difference is observed between the present and early measured logKtw for compounds with logKow>~5, which is attributed to the presence and absence of a triolein microemulsion in water affecting the solute partitioning. The observed lipid-normalized algae-water distribution coefficients (logKaw/lipid) are virtually identical to the respective logKtw values, which manifests the dominant lipid-partition effect of the compounds with algae.
AB - In view of the scarcity of the lipid-water partition coefficients (Ktw) for organic compounds, the logKtw values for many environmental contaminants were measured using ultra-pure triolein as the model lipid. Classes of compounds studied include alkyl benzenes, halogenated benzenes, short-chain chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and organochlorine pesticides. In addition to logKtw determination, the uptakes of these compounds from water by a dry algal species were measured to evaluate the lipid effect on the algal uptake. The measured logKtw are closely related to their respective logKow (octanol-water), with logKow=1.9 to 6.5. A significant difference is observed between the present and early measured logKtw for compounds with logKow>~5, which is attributed to the presence and absence of a triolein microemulsion in water affecting the solute partitioning. The observed lipid-normalized algae-water distribution coefficients (logKaw/lipid) are virtually identical to the respective logKtw values, which manifests the dominant lipid-partition effect of the compounds with algae.
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U2 - 10.1016/j.jhazmat.2014.06.071
DO - 10.1016/j.jhazmat.2014.06.071
M3 - Article
C2 - 25064256
AN - SCOPUS:84904865702
SN - 0304-3894
VL - 279
SP - 197
EP - 202
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -