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首页> 外文期刊>Environmental toxicology and chemistry >BIOCONCENTRATION OF PERSISTENT ORGANIC POLLUTANTS IN FOUR SPECIES OF MARINE PHYTOPLANKTON
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BIOCONCENTRATION OF PERSISTENT ORGANIC POLLUTANTS IN FOUR SPECIES OF MARINE PHYTOPLANKTON

机译：四种海洋浮游植物中持久性有机污染物的生物富集

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摘要

The uptake of polychlorinated biphenyls (PCBs) was studied in four species pf marine algae. A novel experimental system to establish and maintain constant dissolved concentrations of PCBs was employed. Headspace sampling was used to verify that the freely dissolved concentrations remained constant with time. The headspace analysis also allowed sorption to dissolved organic carbon (DOC) to be quantified for all but the most lipophilic PCB congeners. Equilibration with the dissolved phase was rapid for three of the four algae species (< 1 d for the majority of congeners). Organic carbon-normalized algae/water partition coefficients (K_(AlgW)) were similar for three of the four species, but were lower by a factor of 10 to 20 for Phaeodactylum tricornutum. The K_(AlgW) values of the first three species were similar to the octanol/water partition coefficient (K_(OW)) for those PCB congeners for which DOC sorption could be quantified. These K_(AlgW) values also agreed well with organic carbon-normalized bioconcentration factors for PCBs in suspended particulate matter (BCF_(SPM)) sampled in Baltic Sea surface water during the summer.
机译：在四种藻类海藻中研究了多氯联苯（PCBs）的吸收。建立和维持恒定的多氯联苯溶解浓度的新型实验系统被采用。顶空进样用于验证自由溶解的浓度随时间保持恒定。顶空分析还允许对除亲脂性最强的PCB同类物质以外的所有其他物质对溶解有机碳（DOC）的吸附进行定量。对于四种藻类中的三种，溶解相的平衡很快（对于大多数同类物，<1 d）。有机碳归一化的藻类/水分配系数（K_（AlgW））对于四个物种中的三个相似，但对于三角角锥菌（Phaeodactylum tricornutum）则降低了10到20倍。前三个物种的K_（AlgW）值类似于那些可以定量DOC吸附的PCB同类物的辛醇/水分配系数（K_（OW））。这些K_（AlgW）值也与夏季在波罗的海地表水中采样的悬浮颗粒物（BCF_（SPM））中PCBs的有机碳归一化生物浓缩系数非常吻合。

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