Evaluating the sorption of organophosphate esters to different sourced humic acids and its effects on the toxicity to Daphnia magna

摘要: Because of large usage as flame retardants and additives, organophosphate esters (OPEs) are widely detected in the environment regarded emerging contaminants. However, sorption OPEs to organic matter its effects have scarcely been studied. In present study, 9 commonly used 4 representative humic acids—Elliott Soil acid, Suwannee River Aldrich Acros acid—in range 0 mg/L 50 mg/L dissolved carbon (DOC), was evaluated with negligible-depletion solid-phase microextraction verified by impacts on toxicity aquatic invertebrate Daphnia magna. Whereas a high octanol/water partition coefficient (log KOW = 4.51 − 6.64) were associated acids mainly hydrophobic interaction DOC (KDOC) 102.22 105.31, low-KOW (log KOW = −0.65 2.59) not interaction–dominant, KDOC 103.47 104.29. These results corroborated acute 3 high-KOW D. The acid weak had negligible OPEs; presence terrestrial (50 mg/L DOC), however, significantly decreased 53% 60%. indicated that strong between might affect their transportation bioavailability. Environ Toxicol Chem 2013;32:2755–2761. © 2013 SETAC