Retention of plant protection products (PPPs) by aquatic plants in flow-through systems

被引：3
|
作者：
Bakanov, Nikita [1 ]
Wieczorek, Matthias V. [1 ]
Schulz, Ralf [1 ]
机构：
[1] Univ Koblenz Landau, Inst Environm Sci, Fortstr 7, D-76829 Landau, Germany
来源：
CHEMOSPHERE | 2019年 / 216卷
关键词：
Dynamic sorption; Plant protection product; Pesticide; Specific surface area; Risk attenuation; Aquatic plants; SOURCE PESTICIDE POLLUTION; MYRIOPHYLLUM-SPICATUM; AZINPHOS-METHYL; ELODEA-CANADENSIS; RISK MITIGATION; SURFACE WATERS; STREAM; MACROPHYTES; CATCHMENT; EXPOSURE;
D O I：
10.1016/j.chemosphere.2018.10.186
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Understanding fate and transport of plant protection products (PPPs) that enter vegetated streams from agricultural fields is important for both exposure assessment and risk attenuation, yet limited knowledge is available. The present laboratory study investigated sorption processes governing mass transfer of three common PPPs between water and aquatic plant phases at flow-through exposure conditions (transient aqueous-phase PPP-peak of 4 h 25 min) using three temperature regimes. The exposure produced rapid sorption of PPPs to plants, followed by a gradual depuration from plants. Dynamic sorption kinetics depended on temperature, plant species, and physicochemical properties of the PPPs. Sorption to plants contributed to a 10% reduction of the water-phase peak concentrations of the PPPs. However, being reversible, the attenuation effect was limited to the residence time of the PPPs in the systems. Results of the present study highlight that effectivity of aquatic plants in the attenuation of PPP loads may vary greatly depending on hydrodynamic properties of aquatic systems. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：587 / 594
页数：8
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