聚苯乙烯塑料对三苯基锡对海洋硅藻中肋骨藻毒性的影响-塑料颗粒大小的影响。
The effect of polystyrene plastics on the toxicity of triphenyltin to the marine diatom Skeletonema costatum-influence of plastic particle size.
机构信息
School of Food and Environment, Dalian University of Technology, Panjin, 124221, China.
出版信息
Environ Sci Pollut Res Int. 2019 Sep;26(25):25445-25451. doi: 10.1007/s11356-019-05826-3. Epub 2019 Jul 1.
The effect of polystyrene (PS) particles on the toxicity of triphenyltin (TPT) to the marine diatom Skeletonema costatum was investigated. The 0.1-μm PS particles attached to the cell walls of S. costatum but did not cause adverse effects on the growth of the diatom. The adsorption of TPT to PS particles was negligible in seawater systems, but the presence of 0.1-μm PS significantly reduced the bioavailable concentrations of TPT in f/2-Si medium, indicating a potential three-way interaction between TPT, PS particles, and components of f/2-Si medium. The adsorption of TPT to PS of smaller size (i.e., 0.1 μm) was stronger than that of PS of larger size (i.e., 5 μm), which was probably attributed to larger surface areas of smaller PS particles. The presence of PS could reduce the toxicity of TPT. IC values of TPT increased from 0.56 to 0.85 and 0.71 μg/L at the presence of 20 mg/L 0.1-μm PS and 5-μm PS, respectively. The overall results of this study profiled the combined toxic effects of PS and TPT on marine phytoplankton species and highlighted the difference in adsorption of organic pollutants by microplastics in different ambient mediums.
研究了聚苯乙烯（PS）颗粒对三苯基锡（TPT）对海洋硅藻 Skeletonema costatum 毒性的影响。0.1μm 的 PS 颗粒附着在 S. costatum 的细胞壁上，但对硅藻的生长没有不良影响。在海水中，TPT 对 PS 颗粒的吸附可忽略不计，但 0.1μm 的 PS 的存在显著降低了 f/2-Si 培养基中 TPT 的生物可利用浓度，表明 TPT、PS 颗粒和 f/2-Si 培养基成分之间存在潜在的三方相互作用。较小尺寸（即 0.1μm）的 PS 对 TPT 的吸附比较大尺寸（即 5μm）的 PS 更强，这可能归因于较小 PS 颗粒具有更大的表面积。PS 的存在可以降低 TPT 的毒性。当存在 20mg/L 的 0.1μm PS 和 5μm PS 时，TPT 的 IC 值分别从 0.56μg/L 增加到 0.85μg/L 和 0.71μg/L。本研究的总体结果描述了 PS 和 TPT 对海洋浮游植物物种的联合毒性效应，并强调了微塑料在不同环境介质中对有机污染物吸附的差异。
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