Detail of "36559-22-5"

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Evaluation of polychlorinated biphenyl bioaccumulation patterns in white sea urchins (Lytechinus pictus) using multiple approaches

Evaluation of polychlorinated biphenyl bioaccumulation patterns in white sea urchins (Lytechinus pictus) using multiple approaches. Noblet, James A.; Zeng, Eddy Y.; Ritter, Kerry J. (Southern California Coastal Water Research Project, Westminster, CA 92683, USA). Environmental Toxicology and Chemistry, 22(11), 2719-2726 (English) 2003 SETAC Press. CODEN: ETOCDK. ISSN: 0730-7268. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) Section cross-reference(s): 19 The bioaccumulation of polychlorinated biphenyls (PCBs) from 3 amended field-contaminated sediments (with total PCB concns. of ~4, 10, and 100 mg/g dry wt) by white sea urchins (Lytechinus pictus) was evaluated using multiple statistical and theor. approaches. 33146-45-1 and 36559-22-5 are cas registry numbers. These chemicals are also mentioned in this article. Similarity anal. of the PCB bioaccumulation patterns, based on the concept of ecol. communities, showed that the PCB patterns in the sea urchins and source sediments were essentially identical for all 3 sediment concns. However, affinity anal. did show some preference for bioaccumulation of higher-mol.-wt. and more hydrophobic congeners by the urchins. The affinity anal. also showed that within a homologous series, bioaccumulation increased with increasing hydrophobicity. The biota-sediment accumulation factor (BSAF) profiles for the 2 lower concn. sediments (A and B) were found to be statistically different from the high concn. sample (sediment C) by a multivariate anal. of variance (MANOVA). The relationship between the measured apparent org. C--normalized partition coeffs. (KOC) and octanol-water partition coeff. (KOW) (log based) suggested a significant departure from thermodn. equil. A nonequil., steady-state bioaccumulation model was found to correctly predict the obsd. exptl. bioaccumulation patterns. To improve the model performance, a hydrophobic term was introduced to account for the drop-off in BSAF profiles with log KOW 36.5. This study showed that nonequil., steady-state models are far superior to equil. partitioning-based models for understanding the bioaccumulation of org. chems. by sea urchins. .