Pharmaceutical bioaccumulation by periphyton and snails in an effluent-dependent stream during an extreme drought.

Abstract:

:Increasing evidence indicates that pharmaceutical bioaccumulate in fish collected downstream from municipal wastewater effluent discharges. However, studies of pharmaceutical bioaccumulation by other aquatic organisms, including primary producers (e.g., periphyton) and grazers (e.g., snails), are lacking in wadeable streams. Here, we examined environmental occurrence and bioaccumulation of a range of pharmaceuticals and other contaminants of emerging concern in surface water, a common snail (Planorbid sp.) and periphyton from an effluent-dependent stream in central Texas, USA, during a historic drought, because such limited dilution and instream flows may represent worst-case exposure scenarios for aquatic life to pharmaceuticals. Water and tissue samples were liquid-liquid extracted and analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) with electrospray ionization. Target analytes included 21 pharmaceuticals across multiple drug classes and 2 pharmacologically active metabolites. Several pharmaceuticals were detected at up to 4.7 μg kg(-1) in periphyton and up to 42 μg kg(-1) in Planorbid sp. We then identified limitations of several bioconcentration factor and bioaccumulation factor models, developed for other invertebrates, to assist interpretation of such field results. Observations from the present study suggest that waterborne exposure to pharmaceuticals may be more important than dietary exposure for snails.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Du B,Haddad SP,Scott WC,Chambliss CK,Brooks BW

doi

10.1016/j.chemosphere.2014.08.044

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

927-934

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(14)01017-0

journal_volume

119

pub_type

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