Estimating pesticide sampling rates by the polar organic chemical integrative sampler (POCIS) in the presence of natural organic matter and varying hydrodynamic conditions

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• 作者：Lucner Charlestra ; Aria Amirbahman ; David L. Courtemanch ; David A. Alvarez ; Howard Patterson
• 关键词：Pesticide ; Polar organic chemical integrative sampler (POCIS) ; Sampling rate ; Passive sampling ; Natural organic matter
• 刊名：Environmental Pollution
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：169
• 期：Complete
• 页码：98-104
• 全文大小：307 K

文摘

The polar organic chemical integrative sampler (POCIS) was calibrated to monitor pesticides in water under controlled laboratory conditions. The effect of natural organic matter (NOM) on the sampling rates (R<sub>ssub>) was evaluated in microcosms containing <0.1-5?mg?L<sup>?1sup> of total organic carbon (TOC). The effect of hydrodynamics was studied by comparing R<sub>ssub> values measured in stirred (SBE) and quiescent (QBE) batch experiments and a flow-through system (FTS). The level of NOM in the water used in these experiments had no effect on the magnitude of the pesticide sampling rates (p?>?0.05). However, flow velocity and turbulence significantly increased the sampling rates of the pesticides in the FTS and SBE compared to the QBE (p?<?0.001). The calibration data generated can be used to derive pesticide concentrations in water from POCIS deployed in stagnant and turbulent environmental systems without correction for NOM.