Philip T Gidley, Guilherme R Lotufo, Alan J Kennedy, Loretta A Fernandez, Charles H Laber, Nicolas L Melby, Allyson H Wooley, Robert M Burgess
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引用次数: 0
摘要
通过水体重复添加活性碳(AC),以恢复中观模拟器中被多氯联苯(PCB)污染的海洋床层沉积物上的薄 AC 修正砂盖的吸附能力,这些沉积物会不断接受沉积物(污染的或干净的)的输入。当持续输入的沉积物受到污染时,羊头鲦鱼(Cyprinodon variegatus)体内多氯联苯的生物累积量会因反复施用再生 AC 而减少。然而,当输入的沉积物清洁时,在 90 天实验的前 60 天,添加新型 AC 会增加鱼类对床层多氯联苯的吸收。与受污染的输入物相比,清洁输入物中的多氯联苯在鱼类中的生物累积量增加了 79%,这在统计学上具有显著意义(p
Bioaccumulation in fish (Cyprinodon variegatus) during rejuvenations of a thin active cap over field-aged PCB contaminated sediment: The effect of clean versus contaminated ongoing influx.
Repeated addition of activated carbon (AC) via the water column was applied to rejuvenate sorption capacity of thin AC-amended sand caps placed over polychlorinated biphenyl- (PCB) contaminated marine bed sediment receiving ongoing input of sediment (contaminated or clean) in mesocosms. Bioaccumulation of PCBs in sheepshead minnows (Cyprinodon variegatus) from bed sediment was reduced by repeated application of rejuvenating AC when the ongoing input was contaminated. However, when the input sediment was clean, the novel AC addition increased fish uptake of bedded PCBs in the first 60-days of the 90-day experiments. The 79 % increase of bedded PCB bioaccumulation in fish, for clean versus contaminated inputs, was statistically significant (p < 0.05) in experiments where the rejuvenating AC was applied. Equilibrium concentrations in low-density polyethylene (LDPE) passive samplers did not fully explain bioaccumulation. Field implications of this research include setting appropriate temporal expectations of this novel remediation strategy regarding the primary desired effect (i.e., PCB bioavailability reductions).
期刊介绍:
The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere.
The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.